Pray

iTrader: (7)

First off, numbers are SAE and smoothed. I tried my best to make this an apples to apples comparison but the dyno was acting up big time and I only got two recorded runs. I was scared to make any more passes due to the issues. I tried to get the fuel exactly the same and didn't get to adjust the timing back to where it was for the first pulls. I was down 2*-3* of timing. The WB02 got messed up on the second recorded run so I don't exactly know that the AFR's matched. But here are the combos and results. All pulls were done in Second gear. Total I gained 35rwhp and 22rwtq. The least I gained was 15/20rw. The cam extended the power band by 500rpm also. The injectors are at 100% at 6,200. I have a graph if someone can post it for me.


258rwhp 277rwtq
06' Silverado 5.3L L33 51,000 miles
3.42 gears
31.7" tires
Summit 2 1/4" cat back
Summit CAI
Home ported TB
NGK TR55's
MSD wires
13.0:1 AFR
25*-27* timing
87 Octane
.98 correction factor

293rwhp 299rwtq
Same as above with 85,000 miles
Comp LSL 215/223 .604/.610 112
918 springs w/ locks and retainers
Comp 7.4 push rods
Custom 4" intake tube (made by me)
Close to 13.0:1 but not sure
23*-25* timing
87 Octane
.95 correction factor

My first pull was 288/294rw with 12.3 AFR. So I leaned it out 5% and made another pull but the WB02 read 14.7 from the beginning to end of the run which makes me think it wasn't working correctly. I was having alot of issues with the dyno for some reason. Turns out the magnet for the rpm pick up was broken and missing. But I got two really clean runs. So I am not sure what the final AFR was but I am pretty sure it was around 12.8-12.9. I usually see .1 change per % of fuel change. But I can't be sure. The truck picked up a solid 5/5 and pulled clean though.

I am doing Cal Speed headers next and then a ported TBSS intake and Ported LS3 TB. Hoping to get 350/320rw when it is all done.

NIUhuskies

iTrader: (4)

Just wondering, did you go with a small cam for drive ability? Is there a noticeable sound difference?

Pray

iTrader: (7)

It is a 5,000 lb 4X4 truck with a 5.3 in it for one. You have to down size 5*-10* for that right off the bat. It also has the stock stall that I don't plan on changing any time soon. So I wasn't looking for a drag car, just a good driver with more tq.

It does have a little lope to it in drive. I don't think you can hear it unless you know what you are listening for.

FASTFATBOY

iTrader: (23)

Can we have an idle vid?

hellbents10

iTrader: (10)

Good numbers but it will be tuff to squeak 350 out of it with headers and a intake. It usually takes another 8-10* of duration to break 350 with a L33.

Buckwheat

iTrader: (13)

Good gains. How does your truck drive now? Did you gain power from idle to redline or are you missing a little torque way down low?

Pray

iTrader: (7)

Good to know. I was only hoping for 330rw with the cam, exhaust and intake but since it did so well with a choked cam I figured I would get a little more out of the exhaust than the typical 20rw and the ported intake should get me 15-20rw. I think it is better to aim high and be dissapointed than setttle for mediocrity.

I will try to get a clip and the dyno graph uploaded to my snapfish so I can post it. It is really mild.

Pray

iTrader: (7)

The truck feels almost the same just driving around. I did alot of spark and fuel tuning though to get every last ounce of drivability out of it. Made a huge difference. Messed with some of the air tables as well to give me the acceleration I wanted. You can tell there is more power at cruise speeds for sure. No more kicking down to pass or going up hills and what not. The converter doesn't even unlock any more. Just pulls from idle to red line. The least it gained on the dyno was 15/20rw from the last cam from hit to quit. The truck drives great and I couldn't be happier with the results. Especially since I really don't have the supporting mods to run a cam. With the LT's, intake, 2,400 stall, and 4.11 gears this thing is going to be perfect. I also got the gas milage back to 15.3 avg after the cam through tuning so I didn't loose anything.

dug

iTrader: (10)

did you consider using the trailblazer torque converter for the i6 engine?

Pray

iTrader: (7)

Hadn't heard anything about it. What does it stall to? I had an I6 Trail Blazer.

wildcamaro

iTrader: (15)

Good info bro, I'm building a carbed/cammed L33/4speed for my 81 camaro...

I saw a cam on eBay (232/234 .600 112) for 200 bucks but unless I got some cnc that would prob overcam the motor for sure...my main thing with getting the l33 was the high compression, ls6 heads, and most importantly 80 pound weight savings!

Pray

iTrader: (7)

I would say it is a little big but it is going in a car and you have a manual trans so it could work out well on the top end. Heads would help for sure. If that is out of the question then just mill yours for some more compression to make up for the DCR loss.

dug

iTrader: (10)

I think around 2500. Theyre cheap around $200-300. Check out performance truck forums for more info.

Pray

iTrader: (7)

Thanks. I just saw a post about them over there. Guy was saying he could get one for $70.

SmokedOutZ28

iTrader: (35)

x2 Been researching a cam for the burb and this might be one to add to the list of possibilities.

Nothing like having 300whp stock like drive ability and 87 octane!

street demon2k3

iTrader: (3)

Nice numbers considering the lack of headers. What type of truck do you have; crew cab, ext cab?

I figured a cam that size would lose some power down low. Had a 216/220 in a 4.8L reg cab with no stall or headers and it was a tad lazy.

FASTFATBOY

iTrader: (23)

I am looking for a docile, easy on valvetrain cam that produces good flat torque for my road race car. With a small cam and a better exhaust I think I can make 430 ish rwhp in the LS6 thats in it.

camaro98z28

Simple and works. Best combo!

Pwebbz28

iTrader: (31)

IMO the trailblazer i6 converter is a bad idea. The reason it stalls higher is because it's made for a much lighter vehicle so it slips. Buy a real converter if you go with one.

hellbents10

iTrader: (10)

We have used the TB I6 converter in a lot of low 12 second Silverado SSs in the past and they weight over 5000lbs. No problems with them at all, just can't lock them up at WOT. Just make sure to not get a shotty aftermarket one. I was buying them from GM for about $200 a shot and they always did what we wanted them to do.

They will flash to 2600ish with a cammed 5.3l, and blown 5.3l they will go to 2800.