fuzzyjk

iTrader: (4)

05 L33 5.3 with baby comp cam xr269 212/216, no other mods or bolt ons.

Results on dynojet, corrected, manual trans.

358 whp at 6100rpm
339wtq at 3200.

When I went looking at the L33, not much info was out there, so hopefully this helps someone. Basically, with the tiny cam it is at stock LS6 power levels (415 crank).

30th t/a

iTrader: (51)

thanks for posting this. I was actually really interested on what it would take to get a L33 to a LS6 power level.

what intake are you running on the L33?

fuzzyjk

iTrader: (4)

Ls6 intake off an 01 Corvette (still used the truck TB).

Stock engine right down to the iron manifolds.

Stock truck injectors (max at 90% duty cycle)

The for mentioned cam XR269 with 918 springs.

All smog stuff, and A/c still installed.

We could have got a little more but we pulled it back slightly for a safe tune.

gnx7

iTrader: (28)

good numbers.

with ported heads, headers, ported TB, and a slightly larger cam that would be 400rwhp

fuzzyjk

iTrader: (4)

Just another note for those using the DBW. I was concerned the Vette pedal would not comunicate with the truck TB, MAF, ECU, ect. They talk just fine. I did need to swap a few plugs but nothing to re-pin and it went together like it was meant to work together. Lots of miss info on the internet about this. I ended up purchasing a Vette TAC mod at nearly $300.00 that I did not need and worked for hours trying to modify the truck pedal to work when the Vette pedal or monte pedal for that matter worked just fine.

2247Lbs car + 415 crank = one pretty quick car. There are two turbos sitting on my bench earmarked for this car but I am reconsidering going with the boost. I have a H/C Vette with 451whp and this 358whp car make the Vette feel like a Chevette.

fuzzyjk

iTrader: (4)

Here is what it sounds like....dyno pull.

#/watch?v=h6zFB2hdiIU

RedMan*

iTrader: (4)

That sounds pretty nice.
Can't wait to get my L-33 done.

Thanks

cruisin'73

iTrader: (8)

Wow that sounds too good to be real! This may have just have made up my cam choice for my 5.3 swapped Nova...

redtan

iTrader: (5)

Hmm, a 212/216 cam + LS6 manifold = 95rwhp gain?

Must be some dark magic built into that camshaft.

thunderstruck507

iTrader: (18)

If you are comparing numbers from a stock truck don't forget to consider:

manual trans versus auto
likely much lighter wheel/tire combo
end result is tuned
exhaust is pretty well guaranteed to flow better than stock truck

redtan

iTrader: (5)

I used a manual as the basis for the comparison.

310bhp L33 * 0.85 (15% loss through a manual) = 263rwhp
358-263=95rwhp gain

Again, doesn't really come into effect in this comparison. Yes such things do matter, and in that case then the original power loss would be more than 15% but I've normalized that to take into consideration different type of wheels. 15% is a good # to use in an efficient powertrain with lighter wheels. A truck would be more like 25%.

Yes it's tuned, still 95rwhp after all that? Even big donkey dick cams tuned gain in the 60-80rwhp range. A 212/216 is not what I would call a donkey dick cam.

He said that the engine includes OEM cast iron manifolds. The rest of the exhaust may gain some power, but not anything substantial. Maybe 15rwhp tops.

thunderstruck507

iTrader: (18)

Didn't not realize how you were coming to your estimate, I assumed it was based off truck real world results.

You are assuming the 310 rating from GM is highly accurate and that the dyno is not a happy one.

Here is a dyno of a stock l33 in an Extended cab short bed truck (found here: http://www.performancetrucks.net/for...-specs-369537/) :



So it looks like in a truck it managed to beat your theoretical power number. 267 times 1.1 to get the extra 10% drivetrain loss back puts the car at 293rwhp.

This drops the estimated gain to 65rwhp from a cam, manifold back exhaust, ls6 intake, and tune. Still sounds a tad high but not out of the realm of possibility IMO.

stumprrp

iTrader: (2)

l33 has to be pretty underrated. Just those heads alone flow substantially better then lm7 5.3 heads. Nice ride.

Blackpanther99

iTrader: (8)

Nice healthy numbers for the mods.

fuzzyjk

iTrader: (4)

I agree I too was happy as I was shooting for 325whp. The exhaust is less the 3 feet long with no mufflers, the manifolds are off an 2004 Zo6 which I am told flow similar to shorties. I went as far to get a second dyno result from another shop on one of their dyno days...351/340 on a 93 degree day. The wheels and tires are very light 18lbs wheel 19 lbs tire. I can post the dyno pull printout, both are corrected.

offaxis

iTrader: (19)

Numbers look right to me. Trucks Dyno lower than cars and a l33 comes with the better heads 799/243 so with a small cam It shouldn't have any problem making these numbers