(orchestral music)
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- Not as strong as I was hoping for.
- Yeah, I'm a little disappointed, to be honest.
- It's a pooch.
- Well, I wouldn't call it a pooch,
but the LS is supposed to be the magic engine.
- So what we just saw is 371.2 pound feet of torque
at 5,300 RPM, and 451 pointed horsepower
at a big 7,000 RPMs.
I think that this combination is more optimized
for the turbo, namely in the department
of the intake manifold.
I don't think I would choose this intake
for this engine with this cam.
- Not if you were driving it on the street.
I mean, the runners are pretty short,
but really, when was the last time you saw a 327 make 450?
- Especially at less than nine and a half
to one compression, or right at nine and a half to one.
- It is pretty good.
- It's okay, we're just really spoiled.
- Yeah. - Yeah.
It's not flawed, but on the other hand,
look how nice, actually, the torque curve is.
Some 3,500 all the way to 6,500?
That's a nice driving engine.
So there's our heads/cam/intake power curve.
Now we need to compare it to two things.
First, let's have a look at it versus bone stock.
Cam/heads/intake versus bone stock.
- [Steve Dulcich] Ugh, look at that.
- [David Freiburger] It's really bad.
- [Steve Dulcich] Yeah.
- [David Freiburger] I am surprised,
actually, that our version with the intake,
and cam, and heads and everything
didn't give up more torque than this.
It's really only a problem below 3,500 RPM.
I thought it was going to take a nosedive
from 52--
- That's what you expect, but.
- Yeah. - Yeah.
I mean, we added 36 degrees of intake duration.
- And that intake manifold.
- And the race intake manifold,
where the runner length went from this,
and the truck manifold did that in this one.
So this actually isn't that bad.
And now I feel a little bit better about
what we did with the aftermarket bolt-ons,
because if I had no turbo involved in my life,
I would go here and go, look,
we just picked up at 120 horsepower.
- Yeah, see, that's the absolute win.
Except you know in your brain what can come.
- Well, let's have a look at what's to come
and let's compare built versus boost.
(all groaning)
- That's really depressing.
- Wow, that's a punch in the gut right there, wow.
- It's really bad.
- I mean, so much torque.
- Red lines here represent the stock 5.3
with almost 10 pounds of boost from that turbo
and the black lines are what we just did
with almost $4,000 worth of speed parts.
- [Steve Brulé] That's 200 pound feet of torque.
- [David Freiburger] Difference between boost and no boost.
Yeah. - [Steve Brulé] Yeah.
- It's not like this right here is shocking information.
It's just disappointing information.
Because we'd like to see the speed parts
actually be so much better.
- But I'll tell you what.
The extended RPM range kind of appeals to me
with the hopped-up engine
compared to the boosted engine
that falls off a cliff at 5,800.
- But that's because when this is bone stock with boost,
that's what that 190 at 50 cam.
- Yeah, I know.
- And even with boost, it couldn't carry RPM.
Now we've proven our ability for this thing
to run to 7,000 RPM, because of the cam,
and because the heads and intake.
I think the next step is going to be really enlightening.
We're going to go put boost
on top of built. - Best of both worlds?
- Best of both worlds.
Ready?
- [Steve Dulcich] Yeah. - Turbo.
Ooh, the star of the show, and I don't mean Dulcich.
- Aw, I thought you were talking about me.
- No.
So I should give some more specs on this turbo
while he's hanging that thing.
It's a Borg Warner S480, which means
it has a Billet 80 millimeter,
a compressor wheel in it, the exhaust side is 96,
it's a 1.32 AR, and Richard Holdener,
in a earlier test, had converted this particular one
from a T6 to a T4, so it's a little bit of a hybrid.
We got the boost plus built combo all set up here.
We're going to run it right on the same Wastegate spring
as it was on before, and then the real question will be,
will I be able to get Brulé to crank it up later?
We'll see.
So Steve's got it all tuned up,
this is going to be the first time Dulcich and I get to
the run with cam/heads/intake and boost.
Built plus boost.
- This is going to be good.
- Earlier in the day I said to Dulcich,
I bet it makes 800, and he's like, oh, no way.
- No way.
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