Toque

Guys:

I figured my LS6 engine output was right about the norm for output given my mods (471.27/441.76).

A friend of mine seems to think its above the norm.

So who is right here ?

What kind of Normally aspirated numbers (above 450rwhp) are you guys getting from your LS6's ?


My Mods:
Vararam B2 w/Green Filter
Airbridge & Smooth Tube
Ported LS2 Throttle Body
Ported FAST 92mm Intake Manifold
AFR 205 Heads Milled to 59cc for >11.1 comp ratio
Comp 921 Dual Valve Springs
ASP Under Drive Pulley
160 Degree Thermostat
LG's G5X1-E Cam on 114 LSA (228 ish/585 ish)
SVO 30# Fuel Injectors
LG Pro Long Tube Headers With Cats
GHL Bullet Cat Back Exhaust
Monster Stage 2 Clutch with 18lb flywheel





Toque

DANZGLASS

I had these mods and made 450/412 so i say you may be on the high side. Its your torque thats seems a bit unreal. I could have made more as my cats fell apart a couple months later. I'm thinking they were holding me back some. Also 91oct was keeping a bit more from me. Then it was a load bearing dyno like a mustang dyno which isnt as happy as most dynojets.

TEA ported TFS 220's 59cc
Spinported FAST 92 with 96mm snout
96mm NW throttle body
228-232 .614/.614 113+1
FLP longtubes/ with cats
SLP loudmouths
Blackwing
monster stg 3 with light flywheel
Powerbond UD pulley
SVO 30's

Mike94ZLT1

I would say your car is above the norm, if those numbers are accurate. Your torque numbers seem rather high by 20-30 lbs from what I have been seeing. Have you had it on any other dynos?

Toque

Before I added the FAST92 and LS2 TB I dyno'd 448/430 on a completely different dyno.

My Pre Dyno at my usual tuner I got I got 450/427, then added my FAST92/LS2 TB and got my above results.

I don't think its the dyno's. A friend of mine this summer was at 3 different shops around Dallas and said that his results were all very close at each place.

Toque

LoneStarLizzard

Just remember to factor in that when you are measuring small incremental gains/losses, the ambient temperature difference is important. Dyno numbers in 45 degree winter weather will be better than in 90 degree summer weather. Colder air = denser air = more powerful explosions = more mesaurable power.

Mark, my A4 LS1 (versus your Z06 manual) measures 405 hp/400 lb/ft with L/T headers, a mild cam, AFR 210 heads. So your measured power, in my mind at least, is just a tad on the good side of expected, but not necessarily unreasonable.

Toque

I have always been keeping temperature in the back of my mind. The times that I have Dyno'd my baseline, have been in the 55-65 F range.

One time in 100F summer heat I was at a dyno day and was down 14rwhp, and 15rwtq from my previous 448/430 baseline. Same dyno, just a LOT hotter than the previous dyno at around 60F. At the time I thought there was something wrong with my car until someone explained the effects of temperature. It makes sense.

Toque

ThumperNC24

My Z06 makes 466/416.

Your torque is definitely on the high side and so is your power for that size cam. Maybe both ~20 high at the wheels.

It's not uncommon to see H/C/I LS1 or LS6 making that much power though. You see it all the time on fbodys too.

My Cam isn't even that nuts. (low 230s / high 230s).

I dont know if 450 is the 'norm' but if you have a nice quality set of heads, decent intake, and a good cam with a duration 228-240 range and lift close to 600 you should be able to reach it easily.

JohnnyT

I hit 427whp / 394 wtq. on just the following. Hope to break the 450whp mark with a ported FAST 92/90 and e85 this spring but I may be stretching...

Current mods that hit 427/394 (I've heard the dynojet I ran on is about 10whp underrated compared to others around the area too):
- Custom grind Futral cam: 238/240 - .600/.600 - 112 LSA + 2
- LG Super Pro headers and X-pipe
- GHL bullets
- Ported stock TB
- Vararam B2 and Powerduct

Not bad for basically cam only.

onspeed

Were those SAE correction?

Numbers seem high to me as well.

robert miller

But with the cam degree in correct and with a good tuner. Looks good to me. Man have fun and be safe in her... Robert

tlove32

I made 456rwhp / 409rwtq on crappy Calif 91oct with the following:


Trick Flow 215 heads (64cc)
228/232 cam
FAST-92 intake (unported)
LS2 TB
LT headers
Halltech CAI
GHL Bullets
42lb injectors


I'm sure with 59cc heads, an UD pulley, and a ported FAST, I would have been in the 470'ish range. So....you're numbers are on par to me.

Toque

My numbers have always been SEA corrected. That I have made sure of.

- Spring 2004 - 358/348 - Stock dyno. That's average I think.

- Spring 2005 - 390/380 - Then I added LG Pro's with cats, Vararam, Air Bridge, B&B Bullets, and Tune. I think this is also average.

- Spring 2006 - 448/430 - Then I added Ported LS6 TB, AFR 205 heads milled to 59cc, ASP under drive pulley, 160stat, LG's X1-E cam, and SVO 30 injectors. I was told my torque was high because the milled AFR's helped pull my torque up. My gains for the mods seem correct I think.

- Spring 2011 - 448/427 - I was at a Dyno day and wanted to see if my car was still at its baseline it was 5 years before. I figured I lost a little torque because my CCW wheels are a "little" heavier than my stock Z06 wheels.

This is why I can say that the outside temps have been around 55-65 F because I normally do my mods in the spring after tax returns...

- July 2011 - Installed Monster Clutch with light weight flywheel. I could feel the car felt quicker. No dyno numbers to prove anything though. I was told maybe 2rwhp peak maybe with a tail wind..

- Jan 2012 - 471/441 - I added a Ported Fast 92, and Ported LS2 TB. I am confidant that I got the correct gains from this mod.

All of my mods over the years have met what I was told I should expect from each given mod.

I don't think my car is outside the norm... given the results above.

On the other hand, maybe it has just reacted well to my mods? either way it sure feels strong !

Toque

Toque

On a side note... a friend of mine with a 04 Z06 like mine got 459/421 with the exact same setup as mine. I had 448/430 at the time of the comparison. We figured different dyno, made for slight variations. He has a little more peak torque, and I had a little more peak HP. (This was before I added the Fast92/LS2 TB recently)

This is why I figured my car was on par with others with similar mods.

Toque

Scooter70

Wow... my car must be a dog at 424rwhp/372ft-lbs. (It's a very "safe" tune on a known "heartbreaker" dyno.)



Stock '01 LS6 shortblock
Livernois Stage 2 CNC heads
VRX5 Cam 236/238 .601/.605
AR headers, high flow cats, Stock Ti mufflers
FAST 92 intake with ported LS2 TB
SVO 30# injectors
McLeod twin disc clutch
25% underdrive pulley

AU N EGL

smaller 224 or 228 cams give better torque then larger cams IIRC

WayneCar

Extrmely nice numbers Mark. Seems like a case of very well matched
mods giving a bit more than expected from the individual parts.
A question for you. Do you get any surge off idle? As in creeping
through a parking lot? I know that is a severe test, but if I go with
a head and cam package, I really want to keep stock drivability. If
this is to far off topic, please just shoot me a pm.
Much appreciated,
Wayne

Toque

Good point !

That is actually true. I forgot about that. LG's told me back in the day that the benefits of the X1-E cam would give me higher torque than other cams, and a good blower cam if I wanted to do that in the future. Maybe that's why they keep the specs of the X1-E rather hush hush.
I chose this cam because I wanted more torque for inner city driving. That's why LG's suggested it to me. I have had it in there for 6 years now and it still drives wonderful around town. No need to warm up the car like big cams either.

Toque

Toque

Wayne:

Thanks !

Its not off topic to much . I find this cam drives similar to stock. Minor loping at idle (feels good). Nothing drastic. I'm not 100% sure if I know what surging is. My car does not feel that much different than stock. I don't get any surging at all I don't think. I can cruise down my street in 3rd gear just above idle and its smoooooth... Its also partly to being tuned right too I'm sure. My tuner has been doing this since the C4's...

Toque

WayneCar

Thanks for the reply. I have looked at the details of your build
on your web page and hope to mirror it on my Z06.
Wayne

Toque

I wish you luck !

Toque