- $225 used fuel injectors or
$600 high-performance injectors?
- Does more expensive mean more better?
- Let's find out.
- Go!
(car noises) (upbeat techno music)
(register ringing)
- We bought two nearly identical Nissan 350Z's
and we've been modifying them to be fun,
daily drivers that you can take to the track.
One Z, mine, gets all the expensive parts.
Nolan's gets all the cheap, crummy stuff, oops.
- And then we test them to see which components
are actually worth spending your hard earned money on.
- Now in a previous video, we turbo charged both of
our 350Z's, high car, my car,
got a Jim Wolf twin turbo kit.
- And low car got a single turbo fresh off the shelf
from Amazon of all places. - Yeah.
- It's from Amazon it's probably delivered by a freaking
robot. (robot glitching)
However, we ran out of time and we're not able to upgrade
one critical component of the more power baby system.
Fuel injectors. (laughing) - Fuel injectors.
(gulping)
Mm, yes.
So high car is getting $600 600 CC Deatschwerks injectors.
That is $1 per CC,
that's quick math.
- And on low car we're installing $225 550 CC
used R35 GTR fuel injectors,
that's pretty sick.
(burping) Just looking at these already,
it looks like thank you James, one is already broken.
So that's good. (laughing)
Let me just do a quick check and make sure,
nope that's definitely broken.
Injectors are only one part of the equation.
It's pointless to have bigger fuel injectors
if you can't feed them.
- Just like kids.
- Yeah, that'd be--
- Just didn't have a big one if you can't feed it more.
- I did bankrupt our family.
(laughing)
And that means we need a bigger fuel pump.
For that we got the good old Walbro 255 for $100.
The 255 means that it can pump 255 liters per hour
versus the stock one which only pumps about
150 liters per hour.
- After we're done putting all this stuff on it,
we're gonna throw both cars on the Dyno to see once
and for all, who's making the most power baby!
- Woo!
- Wa-pow baby!
- Woo!
(hip hop music)
- A turbo is basically a big vacuum
powered by your cars exhaust.
Exhaust gases exit your engine and spin a turbine wheel
on one side of the turbo.
That turbine is connected by a rod to another turbine
that is sucking in air from the outside and pushing
it into your engine.
And now that the engine has more air than it knows
what to do with, we have to add more fuel as well.
- But when we added the twin turbo kit to high car,
we made about 335 horsepower but we were bumping up
against the fact that while we were adding more air,
we weren't able to add more fuel and so in order to keep our
car from exploding, we kept the tune a little safe.
- And we wanna crank that thing up to the sky
so to do that, we need to add more gas.
So, to add more gas, we got some injectors.
(upbeat funk music)
So the first step is taking off this strut brace
which blocks the intake manifold from coming off.
It's gotta come off because the fuel injectors are
down below it.
- Get the intake manifold off, I believe there's 10 bolts
on top, eight inside of it and then it should just pop off.
- Every step we take we're putting all the hardware
in a different bag so that way when you go to put it
back together, save a lot of time not looking for
bolts and nuts.
- Don't trust your brain,
trust your bags.
(clanking)
(intense keyboard sound)
- The whole approach to this is to try to keep everything
on top in one piece and when it goes back on,
it's faster and easier and we don't have to double check
all the connections.
This is pretty cool 'cause we haven't cracked into our
engine yet, we've added stuff on but we never actually
taken apart the stock motor.
Whoa.
There it is!
That's it?
All right I was expecting two banks of intakes
just to go to either side but it looks like it's just the
cast one piece unit.
That's pretty cool.
I was not expecting to see that.
These are the fuel rails
and each of these are injectors so now we gotta put these
bigger injectors in so we can make some more fuel
with our air.
(techno music)
When you're working on stuff and you got open holes
like this that go directly down in your engine,
it's a good idea to just cover them up with some tape,
maybe stick some clean rags in there.
- If we drop a bolt or a nut or anything down there,
we're screwed.
(wrench clicking) (techno music)
Got the rails free, I'm gonna go ahead and pull it up,
take a look at our first injector,
compare it to our other one.
- Just kinda wiggle them out.
And there's some injectors baby.
(techno music)
- Our 35 injector, OEM 350Z injector.
So the lengths are about the same, all the rubber O-rings
are in the same position, looks like everything's
gonna fit just fine.
These O-rings right here should never be dry,
you always wanna lubricate them with some WD-40
before shoving them up into the rail or back into
the engine block.
- [Nolan] Aaron's using WD-40.
- [James] Yeah, 'cause their poor people injectors didn't
come with this beautiful lube.
- Hey, just 'cause we're using peasant injectors doesn't
mean that we're peasants.
- Yeah this peasant can still kick your ass!
- Hey!
- Not here!
You guys are my best friends!
I'm not gonna have you tearing each other apart
on the day of my wedding!
- If we don't get these cars finished by your wedding,
your fiance's gonna leave you.
- Yeah!
- She said James, I wrote 400 horsepower in my vows.
Don't make me a liar.
- We got all our injectors nicely lubed up.
Now they're ready to go in the rail.
- So this is pretty cool, you know,
using OEM injector on the OEM rail, you literally just put
it in, it fits fine, even the injector clips fit on there.
This is about the easiest swap you could do.
You don't have to figure anything out, they just fit.
- Dropping the injectors, thank you, into their homes.
So we just tightend up the fuel rails
with the new injectors in,
which means, we're halfway home.
- Cue P.O.D., boom!
Here comes the boom!
Ready or not!
Nolan un-ironically loves P.O.D.
- P.O.D.'s got some pretty solid songs, come on.
Let's not kid ourselves.
- Not top five nu-metal band.
- No you want top five nu-metal?
- Top five, nu-metal bands.
- Deftones, Linkin Parks first two CD's,
Rage Against the Machine.
- They're not nu-metal.
- Yeah they are.
- I guess they're rap-rock. - Yeah I give it to them.
- Zack raps too.
- Right, which is nu-metal.
- Yeah, yeah.
Limp Bizkit,
gotta go with Limp Bizkit. - There we go.
- I Was waiting for that.
- They are nu-metal.
- Dude, "Break Stuff" gets me freaking pumped
every single time.
- Punch your (beep) face!
(laughing)
- I'm angry so I'm gonna break stuff.
- I don't understand how to deal with my feelings.
(laughing)
- And Korn is in there.
- Of course Korn, yeah, gotta have Korn.
Yeah. - Top five.
- Nu-metal bands.
- Now we got the injectors all installed and everything,
pretty much just putting the intake manifold back on
and securing all the hardware.
- Time for the fun part.
Remembering where everything goes.
Not that way.
That's the way.
(upbeat techno music)
- All right so there's probably a torque spec for this but
just because I don't know it I'm gonna go ahead
and go star pattern all the way across the whole thing and
button this thing up.
- 80 inch pounds on top,
100 inch pounds around the perimeter.
I just looked it up.
(laughing) (ding)
(upbeat techno music)
- We're installing our Walbro system here.
It's a bigger pump, it can pump more fuel to those
bigger injectors so we can finally unlock the potential
of the big turbo that we put in there.
- Ours is 190 liter per hour pump which is not as
big as theirs.
- Theirs is what, 250?
- 255.
- Ooh!
- I'm not concerned, these engines can only take about
400-ish horesepower.
- Before the butt end gives out and
it explodes pistons and rods.
- So hopefully I think that 190 liter per hour pump
will be good enough for a 400 horsepower.
- Yeah I think both cars are gonna be bumping up around
that 400 horsepower limit.
- I know they're gonna be bumping ugly's.
- Yeah 'cause they're gonna be (beep) so much
'cause they're so (beep) fast the chicks love fast cars,
not, some do.
Get a job, be nice, have a clean apartment or house.
That's what girls like.
- Yeah.
- Girls like guys who like activities.
I got a girlfriend and now I have all these hobbies
and a cute dog and all these girls are like,
oh, what's up with that guy.
I'm like, sorry ladies, I'm taken.
- [Aaron] You got it in bro?
- Not really.
Doesn't wanna go all the way down.
What in the (beep) is happening?
What the (beep) dude?
(beep) Dude.
What the (beep), okay, I'm not gonna get frustrated.
All the lines are set, everything's in the car.
We're gonna make sure it starts before we put
everything back together.
- Give it a go man.
(engine starting)
- A little, it's running weirdly but that's because
we have new injectors in there so,
I think it just needs to be programmed.
I hope there's not a leak or anything,
a vacuum leak.
That'd be annoying.
- We originally planned to drive these things to the Dyno
but they're just not safe to drive on the road.
- The safer bet is to just have them towed.
That's what we'll do, we'll get them towed to the shop
tomorrow morning, get them re-Dyno'd, re-tuned
and I'm hoping for 400 horsepower.
Out of both.
(upbeat swanky music)
- All right so it's the next morning.
- Day of the Dyno.
Ah.
(mimicking dinosaur sounds)
(screaming) (eerie instrumental music)
(laughing)
- So now that we have the injectors on both cars,
we gotta get them tuned so we came to Specialty Z
to see our buddy Sebastian, who's a bit of a Z guru.
Very well respected in the southern California community.
We're gonna throw both cars on the Dyno,
get them running right and finally see how much power
we're making with enough fuel and all that boost.
Hopefully some big old numbers.
- Big old numbers.
- Above 400,
that's what we're here for. - That would be sweet.
- I would be so happy if that was the case.
- Yeah, 410.
- 420 baby. - 420 baby.
Oh, oh, oh, oh. (upbeat pop music)
(engine revving)
- So you hear that kind of odd like (humming),
it's misfiring, don't know why, it shouldn't be.
- Ah, okay, you have the (beep) coil packs in there.
- Yeah.
- That's why.
Those things always bite ya in the ass.
- Do you have,
better coil packs?
- I believe we do.
- Awesome.
You can have a car that makes 400 horsepower say
at your peak horsepower, 400, sure, cool.
But the way that the car gets there makes a big difference.
So, if you have nothing and all of a sudden boost comes
up to 400 horsepower versus a car that makes a bunch
of power right off idle and then kinda flattens out
up here and makes 400 horsepower.
That car has a lot more area where it's making
that power on this graph,
which means overall it's gonna be a faster car.
(engine roaring)
- All right.
- That's the number that I would walk out of here with
a smile with.
- Yeah, for sure.
- Our final run we made 372 horsepower
and 383 foot pounds of torque.
I'm pretty happy with that, it's not quite the 400
we were talking about but it's gonna be reliable.
I'm sorry dude. (laughing)
I'm so excited to drive this thing back.
But honestly more than that, I'm more excited to see
what low car makes.
- Yeah I think their gonna make like, 680.
(laughing)
(engine roaring)
- At 4000 RPM,
we're not even making a pound of boost.
She needs help.
- Yeah.
- The manifold design is not giving the wastegate priority
so we're getting an overboost situation.
We have no power under the curve
and we have a lot of work cut out for us.
- Oh, okay.
What can we do then?
What are the steps?
- So, in order to do it right or in order to low car it?
(laughing)
- (beep) Needs to get fixed.
There's a bunch of exhaust leaks,
the wastegate needs to be addressed correctly.
You kinda have to start peeling back the
layers of the onion.
(engine revving)
- Made less power on that run.
So, Sebastian's,
he's dialing it in, you know?
He's working on it.
I trust him, this guy knows his (beep).
I'm not gonna worry, I'm not gonna freak out yet.
(engine roaring)
(engine winding down)
- Is that all she wrote?
- That's all she wrote until she gets,
you know, fixed.
- Not looking good for us.
We ended up with 302 horsepower
and 261 foot pounds of torque.
That's pretty disappointing.
- It is very disappointing.
- It's just the limitations of a freaking kit
you buy on Amazon.
- Who cares if your kit is garbo, bro!
- Yeah let's, go have some fun.
- Let's just go make some turbo noises on the highway.
- First fire up.
(engine revving) (rock music)
Woo!
- Here we go baby.
- Oh my goodness!
(laughing) (mumbling)
I love this car.
300's enough, 300's enough, that's all you need.
- This has sort of turned into a rematch of the cheap
turbo kit versus the expensive turbo kit
and really low team ended up really paying for their sins.
Let's get to the numbers.
- Lets do it.
Before turbos, low car made 250 horsepower,
high car made 210.
After turbos, the first time around with no injectors,
low car made 302 horsepower and high car made 334.
- Nice.
- But now with proper injectors and proper tuning,
low car makes 303 horsepower.
- (laughing) Nice!
- And high car makes 373.
- Perfect. - Yeah.
- Honestly I was a little disappointed with the outcome.
I thought we were gonna be able to hit 350 no problem,
just because of how big that turbo is.
- All in all I'm pretty happy with the super usable
372 that we made.
Power in high car just comes on early and just continues
in a very uniform arc.
- [Nolan] Whereas low car looks like a very gentle slope.
- The limits of the cheap turbo kit, all the boost leaks,
the poor fitment, really, really made themselves apparent
and really are holding you guys back.
- Absolutely.
Oops.
- Which one would you buy,
expensive injectors or used R35 injectors?
- I think I would go with the used R35 injectors,
I mean they work just fine.
- Yeah I think I'd have to agree.
I think we could definitely get away with the smaller
R35 injectors and last time Nolan, you said that you
would've gone with the cheap turbo kit.
Have you changed your mind?
- Little bit, yeah. (laughing)
- Yeah dude.
Thank you so much for watching "Hi Low".
Next week, we're gonna upgrade them even further.
Dive deeper into the suspension stuff with adjustable
front control arms, adjustable rear control arms,
bigger sway bars, end links and then we're gonna align
both cars for the check and get them both corner balanced.
If you don't know what that means, next week,
you will find out.
Go to donutmedia.com if you wanna pick up some merch.
Follow me on Instagram and Twitter, @jamespumphrey.
Follow @nolanjsykes, follow Donut @donutmedia
across all social media.
- Be kind.
- I love you.
- See you next time.