MAXING out our Cheap Race Car on the Dyno! (Cheap Race Car Ep.7)
1 Video View·Oct 19, 2026
Real quick, I just want to let you guys know that we're discontinuing
our "Don't Worry, I Got This" and our CJRC graffiti logo shirts.
So, from now until they're sold out, they're 20% off.
Go to cjracecars.com.
Get one of those designs before they're gone.
Hey, guy.
Josh, what you got there, Josh?
Those are my favorite pants, bro.
Huh?
She gave you the good ones.
Hey!
She gave you the good ones, bro.
Those are driving pants?
Dude, you know how much I've won a lot of races
in those, working in the pits in those.
Those are good pants.
Well, hopefully they give me some good luck.
I like those.
I don't know whose jacket this is.
Are those corduroys?
is that what they're called i don't know i'm
surprised they don't get it a lot of race has
been one of those if you left your jacket
in my race trailer we got it for about five years
josh are you ready i'm ready buddy you sure all
right all right hey man we we were struggling
over here you you're one with that car right
which me and taylor were trying to crank it and
we could hardly get it started it
was puffing puffing puffing about ran the battery dead
you know i knew josh wasn't in the seat was what it
was that's what it was didn't want to run
right didn't want to act right without josh
in there the best part about this is that thing's
got that front exit cable shifter
and i can't wait to see you in there grabbing them gears
oh he's gonna be struggling well we already talked about
that that's got the wrong gate
it's got the wrong gate in it
so it's gonna be awesome it's gonna be awesome he's got a feel
for it in there in the middle high end
car too we got three cameras just on Josh
you better hope you do high gear only pulls
on the dyno you gotta put one on the dashboard
straight in his face yeah at his beard out eyes like
this yeah that's normal let him borrow your
glasses this is Eli
Troy's dog and like a lot
of other dogs he's dealt
with some annoying allergy
issues scratching licking
and just being uncomfortable at times one thing i didn't
realize was how closely a dog's digestive health can
be connected to their allergies and immune
system that's one of the reasons we started using
better wild allergy relief soft chews with Eli
Better Wild makes veterinary
and formulated supplements designed to support your dog's immune system
and overall health using natural ingredients.
Their allergy chews are designed to strengthen digestive health
and support your dog's allergy defense system.
They use science-backed prebiotics, probiotics,
and postbiotics to help support a healthy gut microbiome.
The formula also includes ingredients like salmon oil,
colostrum, and L-saki to support
healthy skin, immune function,
and help with things like itching and redness.
And probably the biggest thing for us is they're easy to give to Eli.
We just give him the chews and he's happy to eat them.
So if your dog struggles with allergies too,
make sure to check out the link in the description
below or scan the QR code on screen
and use promo code CJRACECARS at checkout.
That code stacks on top of their already discounted subscription price.
So make sure you use the link below to get that offer.
Thanks, Better Wild, for sponsoring today's video.
Put some race gas in because we're over here on a dyno.
That's race gas.
One thing I'm starting to realize, when we were building this,
we probably could have moved the fuel cell back a little bit.
Just a little bit. Look at that.
Yeah, it's a little tough.
Cut this out.
Yeah, but, I mean, it's going to work, you know?
Yeah, that'll work.
So when we drive this, we can run E85.
We'd probably be okay on a dyno, but it does make 12-to-1 compression
because we found the cheapest engine we
could find that would make some power,
which is a little bit more than we probably need
for having some boost going in there so we got
some real VP X85 so we're going to start there just
to make sure we don't have any detonation
John is here from IRD Carvers, he's gonna help us with a tune
and we're at Blacklist Performance
on their hub dyno which is way
to go you know i mean it's not this thing is serious
hub dyno hub dyno is really a way to go
because you don't want if you're on a rollers which the
rollers work okay but if it's spinning
or moving it this is real deal right to the right to the
source so we're going to know for sure we got going
on Tom what's your horsepower guess before
we leave here today the highest horsepower
the highest horsepower yeah 1050 1050 thousand
fifty okay that seems a little well i don't want
to overshoot it if you go over you lose
to be honest that seems too high
if you go over you lose seems too high already it does i don't
we'll see a thousand fifty i would
be super excited about that that means we definitely
got eight second hot rod easy if it makes a thousand fifty
so we'll see Josh what do you
horsepower wise on doesn't matter before we leave
highest before we leave 1185 1185 we're on a hub
dyno you guys must know something i don't know
that's a hub dyno man they're a little more uh
how do you say relaxed
on numbers i guess okay we'll see i guess i'm thinking like a thousand
thousand nine ninety five i've got two numbers nine
but you got two numbers you said one number
i got a 650 number 650
and we make 650 we're leaving it here well something goes you know
so yeah that's what i'm saying it still might make 650. yeah hopefully
on its way to a thousand on
its way to 10 yeah hopefully like 650
a thousand same round somewhere in there we'll make 650. so
if it if it hits 650 you owe me a coke i'll get you
a coke anyways tom just because i like it
okay all right john so you built this carburetor
yeah unfortunately we don't know anything about
this engine yeah so we're just kind of guessing
on everything really educated guesses i've got a lot
lot of data on small block Ford engines
so let's just say i erred to the side of caution on this
carburetor with some spare parts i had in the shop
so i mean they ain't pretty but they'll work
well let me ask you a question
because i've never done any carbureted stuff that's just
just haven't okay now when we do fuel injected stuff
and we need more fuel we just type in some
numbers when you need more fuel to the carburetor how
do you tell it it needs more fuel as it builds
boost well besides just boost reference
or is that the thing that i do is is that even though
you have a Holley Dominator setup in there
or Terminator X or whatever you're running your
data log is going to show you like where you want
your proposed air fuel numbers to be so
sometimes what i'll do is i'll go in there
and i'll use target air fuel and then i'll get it as
close as i can to where i want to see it drop
and then as we get into a load to make sure that we
have enough fuel to keep this thing rolling if it doesn't
then we have options to add fuel either be
boost reference power valve if the car's equipped
this one is or sometimes we'll use a high speed
air bleed we'll manipulate that make three thousand smaller
or four thousand bigger depending on what
the car needs and a lot of people overlook
that and that is a huge adjustment because let's just
use it as an example let's say your air fuel ratio is 10 to 1
and you have a 35,000 speed in it and
you want it to be leaner you would go from let's just say that 35
and you want it to get up to
let's say 11 or 12 you would go from 35 to maybe 38
or 40 and take a swing and what that does is
it takes your overall fuel table
for you injected guys out there we will take the fuel table and we
will go from 10.0 to 11.0 okay
so it'll bring the whole thing up across the board and then obviously
we have low speed stuff that we can
do on the motion package for again EFI guys uh that is
our fuel table so we have to play in thousands you guys get
to play with numbers so it's a little
different but the ending result is the same
um as long as the motor is what you guys somewhat
know it to be i guess because we're all
in this we're all in this uh predicament right now but
you know if we creep up on it a little
at a time we should be all right yeah we'll just need to
see i mean obviously we don't have the choice
of fuel that we want i would have preferred to see
some x85l in it only because of the compression being 12
to 1 um if it's actually 12 to 1 yeah
we don't know we don't really even know but that's
what we we bought the engine that's what we're
told yeah so you know at that point you know we'll go
and read the plug that's that's it man a lot of
guys like following that air fuel sensor man the plug
is the real measurement yeah that's the real
deal that's it it's it's in the middle of the chaos
and that tells you everything right there
so for sure well now knowing what you know what
do you think we can make before we leave here today
I don't know.
If we get saucy with it and the motor shows us it's happy,
oil pressure's great, we don't have a problem with any of the fueling.
And, I mean, like I said, you know,
the fuel pump in this car is what I'm worried about.
Yeah.
I don't know if it's going to have enough for us to do what we want.
But if we can get it 12 pounds, I'm going to be cautiously optimistic.
Let's go 930 to 950 at the hub.
And then if we decide we want to get froggy and go 15, maybe 1,200.
Wow, 1,200.
If this thing makes 1,200 horsepower and it weighs 2,800 pounds,
how fast are we going in a quarter mile?
550 is 850 or 870, somewhere in there.
And if it's 2,800 with that,
I'm going to say it would be a low eight second car.
That's what I'm thinking.
Low eights.
And then if we get that, let's just call it hero air, if you will.
Yep.
Some boost weather.
We'll get that thing in the sevens.
They might not like it, but we'll get it there.
Sevens would be insane, especially for the budget.
I know we did go a little over budget, but all in all, to go sevens
with a car that costs $18,000, $19,000-ish will be absolutely crazy.
Parts-wise, we don't have a lot.
I think a lot of people looked at the labor we have in it
because we do have a lot of labor in it.
But the goal with this cheap
car challenge was what could you in your garage build
if you have the skills to build a car for X amount of dollars.
So, really, we have $18,000 of parts,
$18-something thousand dollars of parts.
And if you could do the labor, you could have the same exact car, too.
All right, Josh, you ready?
Ready as I ever be.
You got all the bolts tight?
Bolts tight.
nothing's loose you didn't forget nothing i hope
not i hope not too bud i hope not too
it's it's been a long time
for sure all right we're about to check the timing
all right we're gonna do pull number one what's
the plan here floor it flash the converter
see what
the AFRs
are all
right
let's
do it yeah
i mean
that's
not bad
yeah yeah
yeah um that's not bad not a bad start that's
not a bad start all right we got the plug out after
that little pull right there
and what do you think 5600 i mean it didn't really show us much as far
as like what it is but when you look
at the plug here you can clearly see that there's not a lot
of heat and on the ground strap right here we're extremely conservative
on timing um obviously this
these plugs have been in there for a lot
of start and stops and moving around the parking
lot and stuff like that once we get the first 6500 pull
in 7000 ish we're going to check to
see how much heat's around this cadmium to start
and then our target's going to be is to make this
you know, electrode look really like a nice eggshell white,
you know, with a little bit
of fuel ring at the bottom.
And ideally that timing mark either is going to get here or as
we add more power, it'll start to get towards the beginning
or the middle of the bend. But for just
starting this out, I'm good with it. All right.
I like it. How much boost did it make right there?
Any? To be honest with you, I don't know.
We don't know. We didn't, we didn't datalog that
time. So we're going to do it this time. So we're
going to change some things over. I'm going to
have them move the air fuel sensor over
from the mainline dyno to the actual car. And then we won't
have to worry about stuff on that aspect
of it all right i like it let's get it all right second
run we're taking a 65 or 7000 i'm gonna back up for this one
because i know you had this motor
part around so i'm gonna back up
which rod did you have out just in case we have any we'll find
out when it
comes out look
at that green
though look
at that pulling
though you see
the graph
let me see the graph pretty good yeah yeah yeah
no we're good what's the green wait what's the
green and what's the red how do we know what we got going
on there i don't know it looks good but
i know we made 795 all right so the green line is horsepower
so it was not even trying to if
anything it was still going up pretty hard yeah
but we were we were climbing with boost too so
that's what it's gonna do a thousand a thousand would
be amazing honestly all right let's look
at this though we did we did have some some more
boost than we thought we're gonna have right we
got a little boost creep
because right now we have no co2 on and the boost went to 14 yeah 14.1
pounds 14.1 pounds on a boost
which is more than we would like to see but john said it's
okay we took the plug out he said it needs a little bit of fuel
so he's got some some drill
bits and some hammers and a crescent wrench he's going
to tune the fuel up for us right
pull plugs out now and maybe put new plugs on so we can actually see
because we went to what
rpm we go to 7500 7000 7000
so we might be able to go to 78 if it sounds good yeah and then that's
going to keep going up i think we might go get
to a thousand my 1100 ish doesn't sound bad
if we go to what that was this thing's gonna
run good oh it's fine are you ready i'm ready
john to tune this up now i know you need a i know you need
a crescent wrench, a hammer, a flathead do
you need does a does a hammer need to be a wood handle
or regular right there we don't use hammers
here homie i thought it was a wood handle hammer only
no man that's for guys that wear jorts and
New Balance bro ah you're right that's a double
that's that's an all-in-one right there so you
don't have to carry so many tools yeah yeah i like it
that's the answer we needed to tune up your
carburetor and you got 18,000 drill bits fine
tuning sometimes all right so we took the waste
gate apart and i think we put all the springs
in there josh said he wanted all the boosts so
he put all huh that is straight out of the box well i know
but i don't think you're supposed
to put all of them in i didn't do that it
was in the box oh well they just put them in there so
they could uh save on shipping
and not have a bigger box yeah that's wild so that's why we're
having boost creep i would imagine right all right
so we're gonna fix this spring so we got a little
boost control hopefully give another shot all right we're going
to make another pull but this
is going to be an easy pull it's not going to make
as much power because we change the spring
but now it's going to have less boost
but we got to do this to know where our boost curve is
to then add a boost ramp to the program
and a Holley so it's gonna make a little less power
but we got
to do it 659
this though
this means we
can actually
control
the boost now
right before it was pretty rough how much boost
to make Josh I'm assuming well five pounds five
pounds so a lot less boost still good horsepower
though for how much boost for five pounds 660 I
like it pretty good all right now we know where we got
to start with a boost ramp to add some boost
with some CO2 yeah make some power oh yeah all right
so that was after the pass and after the
adjustments on the carburetor what do you think
so this is only five pounds so at this point it
didn't quite open up the boost reference power
valve what it's showing us here is is that there's
heat you see how it's kind of pinkish
and then it kind of has the yellowish look to it and then it
goes back to the purple as it goes around it doesn't quite get
to dark gray and you see how
the center of the electrode where it's nice
and eggshell white it's telling us that it's happy
down low does it have a little bit of extra fuel of course
and then once it gets into boost and we
actually add that extra fuel through boost referencing
this plug either will cool off just
a little bit or it'll maintain
so that's just telling us that in our linear pull that we just
made for five pounds and not even opening up
the boost reference power valve this is a good clean
start it's not over flooded it's not drowning the car it's not sticky
and there's no fuel residual
left awesome so we're ready to add some boost yeah i think
so i think if we put uh since we
got five on the spring and that's all we made
um i think that if we put 10 on there and we can get
there just in little increments we'll make sure
that it's right all right what do we got we're
about to make another one got 10 psi on the dome safety's
at 16 pounds i'm gonna open the dome
we don't forget that you got the air fuel
on make some power blow it up one of the two no hey
start to sound
like josh 23 josh
no it's not gonna
be on 832
but that's
not gonna be on 10
pounds i don't think no that's gonna
be more than 10 he put 10 on the dome it's probably i'm gonna
say it's about 13 maybe more than 10 probably i think
so and i didn't see no parts come out of it
it's not rolling yet yeah what rpm
did we go to 65 okay we'll see here's
the laptop check the
data log see we got josh see how much boost power
is out the back 11 pounds that's only on 11 pounds
11 pounds and made 832 josh you're about
to be in it you got your rocket ship cheap car rocket ship
here all right we got josh gapping some plugs
the last pull looked good looked a little lean
so john's over there swapping the jets
and the carburetor and we got a little bit colder plug
we're going from an eight to a ten right Josh, yeah
is going from an eight to a ten i think this
will probably be our last pull huh hey man john's
saying yeah john's confident he's been he's been
pretty on the money with all the tune-ups
and stuff so far he's got this thing dialed in and
he hasn't even had a hammer out yet i thought
for sure there was going to be a hammer in this box
but no hammers i'm really surprised
by that no hammers we got the plugs changed to a colder plug
john changed out the jets
and we're targeting 15 pounds we made 11 on the last one but we got a
boost cut at 20 that was josh's decision
so if at 19.5 it tosses the rods out of it josh is
warrantying the engine so we're good there he's
warrantying it he said put the boost cut at 20 not
16 so if if we have a data log and that's
when it kicks rods out it's on josh that's right
did you did you
did you bring
your
check the 899
it sounded
good though
i wonder
if it hit
that boost cut i couldn't make 20 no way hey 16.4 wow all right
and it's uh it's linear
so 16.4 was like at the end what rpm was that 7300
7300 73 that's awesome 900 horsepower
oh look at that see that rainbow color is that good
or bad that's good it shows you that you
got the heat there we're not we're not being too lazy on it
but you know we're not we're not being
too safe but we're not being
not aggressive enough it's it's got enough heat to keep it in there for
where we're at 7,315 pounds I'm okay
with that and then now I'm going to take the autoscope and
look down in there and make sure we got some fuel left you'll
be able to see that because on some E
you'll be able to see like a light graying
or like kind of like a pencil lead mark that'll let us know
what we're dealing with but i mean for the most part
that nice rainbow color looks really nice
all right now let me ask you a question okay we're
on 16 pounds okay you think we can get to a
thousand safely yeah i mean we can shoot
for it we just need to make sure that we got the fuel
there and then we just trim it wherever else we need it
to get it to cruise where we want it and
should be good all right josh i need to get
an updated approval from you are we guaranteeing
a thousand horsepower bottom end right here yeah you're willing
to guarantee that one yeah
okay and if it breaks you got it
no no no no no that's why i'm asking you you're good hey it's
it's rich the timing's pretty safe i'd throw 20 pounds
at it okay all right hey we got we got
josh's blessing all right we're gonna make one more
pull we got 899 i really want to see a thousand
to be honest and fair i don't know you don't know
john well john's saying we might be out of fuel
but we're not sure so he's got his phone right there looking
at the gauge but by the time that
phone picks up we're out of fuel it's gonna
be too late if it's really out of fuel but i think
we got to try to see a thousand at least one time
so john went through all the plugs and basically
what we got is number one and number three looked
a little hot on the timing so we took some out of
those individual holes then we added one to all the holes
and we're gonna put three more pounds
of boost on the dome that's pretty safe i feel like really safe
and we're gonna go from 7300
to 7500 so it's possible we see a thousand
if we don't we're just gonna have to live with where
it's at because we do want to make it
to the racetrack yeah we don't want to this to be the
end of our cheap car right here yeah we don't want
to see a rod hanging out the bottom of it
not ideally not ideally all right
so we're gonna uh he's doing all this in the computer now taking
the timing out of those two cylinders adding
a degree to all the rest of the cylinders
adding some
boost let's see
what we can do 915
whoa ah whoa look
at the look at
the look at this
it's just straight up i mean it's trying
to make a lot more power what happened there
did it go to 7500 like 73 you might have chicken
for a little bit maybe 20 pounds 20 pounds 21 21
pounds like right at the end it's still very linear 21 pounds
at 15.6 degrees 15 16 degrees
16 degrees as as it's coming up on boost it's going down
in timing right on our timing map
about 16 degrees dropping down to six
and a half pounds dropping down to six and a half pounds the
fuel is yeah it's really hard to see
because over here he's got 12 13 14 15 here's the gauge
and as it climbs in that run you see how it falls off
when he's done at the end of the run it goes
down to three whoa and then we're done with the run right here
so if you go back up to where it's
actually showing you see we're visibly
at seven uh-huh okay this thing's bouncing around bouncing
around it's six seven eight you know it ain't going anything past eight
and a half as hard as
it is to see this you can clearly see yeah it
is not doing that this is why i'm saying with this
pump i think we're at the threshold of what it's capable of doing
so if you look at the afr on that
pass we were at 11.3 the pass before that pass we are 12.9
so that pretty much verifies what
john's talking about that we need more pump
but we can't afford more pump so what we're gonna have
to do is call that the end of this dyno session i'm pretty happy
with it i think we can go fast
enough with 850 390 horsepower
and we will just leave it like that maybe one day down the road
when we have some budget you know when it's not the cheap
car anymore we'd add a pump and and
really turn this thing up
but for now i'm happy all right well that's gonna do it for today's
video we're done here at the dyno thanks again
to Blacklist for letting us get on the hub dyno
last minute and they're staying late look
at this it's dark out here it's 10 o'clock at night
they're tired too they were willing to let us keep going
but we don't we don't really have any
reason to keep going it's not gonna do us any good
so i just wanted to touch on a few things
uh last night at the dyno when we left it
was late everybody was tired and we just want to
get out of there but john from IRD if i just want
to give a big shout out to he was absolutely
awesome the guy has so much knowledge
when it comes to these carburetors it's it's insane all
way over my head but i'm gonna put a link uh
to his website below you guys want to go check him
out he makes some awesome stuff
and it works really well he actually has the highest horsepower
blow-through carburetor on a hub dyno ever in the world
so pretty awesome we talked to john some more
he looked at the plugs after this video
and he basically said he doesn't think we're running out
of fuel he thinks that a spark was getting blown out
in a few cylinders that's why we went up so
much boost and it didn't reflect in the horsepower
so we got some stuff to figure out either the plug
gap was too much and it was blowing it out
or we need some coils or something so we're going to
look all that over the fuel pressure was also
not going up with the boost reference so we're going
to work on that stuff this week hopefully we can get
to the track ASAP we're saying we want it to be
safe if there's an issue with blowing a spark out
or not getting enough fuel because it's not
seeing boost referenced and we got to get that stuff fixed
but i didn't want to say that because
in the video we said that uh basically it wasn't getting fuel
or that we're at a fuel pump but i don't
think at this point that's the issue anymore
so we're going to try to get that stuff figured out
get this thing to the track thanks for watching this cheap
car stuff has been absolutely awesome
i know we went over the budget
but it's been a really cool really cool project and hopefully
we can race this thing do some drag and drives
and and have an absolute blast with it that's
gonna do it for today's video thanks for watching
make sure you like share and subscribe and we'll
see you on our next one

