bigeller

iTrader: (2)

Yesterday at Dyno day I had an opportunity to look at an LS1 powered car with similar mods as mine.. I know they aren't the exact same mods, but interesting nonetheless..

• I have an 2002 LQ9 in my '99 Z28 with the following mods: TSP 228Rcam/BPR LS6 heads 2.00/1.55/LS6 Intake/Shaner2TB/Asp Crank Pulley/SLP smooth bellow/Comp timing set/Comp R Lifters/MTI 7.4 pushrods/Comp 918 springs and 772 retainers/Whisper lid and K&N/1 7/8" Thunder Racing Headers/4"Mufflex/Vig3200/3.73s/Rock On BUILT 4L60E/Global West SFC, PHR, LCA/Spohn Relocation Brackets/SLP Eibachs/Mac Rear Girdle
  
• His 2000 LS1 had the following mods: Absolute Speed StageII 5.3L's, TSP Custom Comp Cam - 228R, Manley Pushrods, LS6 Intake,ASP Und Pulley, Whisper Lid, K&N, NGK TR-55's, Taylor Wires, Hypertech 160* T-stat, Hooker LT's with Dr. Gas X-Pipe through Bullets, , Race Prepped 4L60E (Mike's Trick Shift) with Vacuum Modulator, B&M Tranny Cooler, Yank PT4000 TC, 3.73 Gears

I thought this was a really cool comparison, and of course in no way indicates what would happen at the track.. Looks like the extra cubes helped out a tad..

Please post up your thoughts.. I was told 5-6 months ago I would gain nothing from going with the LQ9 6.0 over the LS1 by several members..

Here were our best uncorrected head to head numbers..

GrannySShifting

iTrader: (10)

so from what im seeing the 6.0 motor is down on torque down low, that or thats the 4000 stall in the other guys car. Have any locked graphs?

bigeller

iTrader: (2)

That is the only heads up graph of the two I have.. I have locked and unlocked of mine posted in another thread..

You have them reversed.. The green and red are the 6.0L 420/425 unlocked actual..

GrannySShifting

iTrader: (10)

The 6.0 is down on torque then at 3500-5000 It didnt pass run #4 until 5000

bigeller

iTrader: (2)

I see it as the 6.0 makes more low end and high end torque and horsepower.. The LS1 is better in the midrange..

BigTex

iTrader: (16)

Horsepower is calculated from torque. The HP and TQ graphs will intersect at 5252 rpms. Notice the brown/red and blue/green cross each other at the same rpm (with the brown red having less power at that intersection).

Looking at the graphs, I agree w/ Grannyshifting, your 6L is down on torque. Then at 5000 rpms, your combo turns on and climbs fast. Your torque peak is a couple hundred rpms before his graph starts. At the point where his TQ starts, its 20 ft pounds more than your car. I would have expected more torque out of your 6L and maybe more peak out of his.

Is his 228 cam on a 114 lsa? Yours on a 112? His power graph looks longer and flatter, with less peak.

bigeller

iTrader: (2)

Nope his cam is a 228/228 .588/.588 112 +3
My cam is a 228/228 .588/.588 111 0 adv

Obviously the torque is less than his hard hitting Yank PT 4000 to my vig3200..

bigeller

iTrader: (2)

Interesting.. His car ran a best of 7.3s as is.. My car ran a best of 7.37 cam only with the #317 stock heads.. I've added the ported SDPC LS6 heads and gained 40hp since.. I hope to get some new times this weekend..

BigTex

iTrader: (16)

Shoot, I read your other post, and was thinking these were locked converter numbers. Obviously, if the converters would change the toque readings. Sorry about the confusion.

JZ'sTA

iTrader: (23)

Even though this wouldn't make a HUGH difference, you have LS6 heads, vs his LS1 heads. You just picked up some extra power because your compression is higher.
Also you have LS6 heads which we all know are a better flowing head then the LS1 heads. If the same company did the same job on a LS1 head and a LS6 head there would normally be a 10-15 HP gain up top which is where you are seeing your gains. The reason being is the LS1 head flows nearly the exact same as the LS6 until the upper range where the LS6 really proves its value.
With this being said I can see why you pull him up top.
In my oponion, if you trade him verters with your car making the power up high to 6800 your **** would fly.
I am shocked your car went 7.37 already without the heads. That is amazing to me that a 386 HP car with a 3200 converter went that fast. Almost dosent make since. In fact it dosent make since unless you car is very light, or you had 80 MPH wend blowing at your back. ???????????????????????????????????

Oh wait you said you had a Vig 3200 stall. That is more like 3800 actural stall ratio.
Vig puts goofie numbers on their verters. My old 2800 was acturally a "3200" stall converter. I cant figure that one out either.

bigeller

iTrader: (2)

Well you have a point about the LS6 heads being a touch better.. But he does have the absolute stage II 5.3L heads compared to my stage I LS6 heads.. I have to say this about the compression.. I'll bet my C/R is close to 10.3:1 as near as I can tell.. The #243 casting I picked up were 70cc chambered.. They had never been milled.. The normal Z06 heads are like 64.5 cc chambered.. I had the heads milled .010" just to true them up.. This way I can stuff a bigger cam in there down the road if I so choose. I happy with this TSP 228R for now.. And people were telling me the cam was too small... LOL

Now about the converter.. I had the vig3200, because I was planning on spraying the car, but ran into an opportunity to trade for a TCS 4200 with a 2.85 STR... All I have to say is OMG! You are right about flying..

On paper this car should be .4-.5 quicker.. 40hp from the heads, badass verter, and about 120lbs out since cam only time.. Of course the bad news is... That's on PAPER.. Now it's all a matter of getting it to hook up with my fatass in the car.. LOL

jtz28

Move your seat to the trunk and put an extension on the steering wheel, talk about better weight transfer