View Full Version : Heads/Cam Dyno Results 475 RWHP

Mike TexaSS
05-16-2006, 12:07 PM
This car belongs to Beck01 here on LS1Tech. :)

Here's the setup:

2004 Z06 - Bone stock 346 shortblock
LG Longtube Headers WITH cats
LS2 Throttle Body and MAF
FAST 90/90 Intake
AFR 205 Heads touched up by Casey Snyder @ The School of Automotive Machinists
Custom COMP Cam (Secret specs but it's smaller than 230 @ .050, XE-R Lobe)
Comp 921 Springs
Stock Rocker Arms
ASP Underdrive Pulley

475RWHP/428 FT. LBS.

Attached is the dyno graph:

05-16-2006, 12:41 PM
Nice numbers dude

05-16-2006, 12:58 PM
nice damn numbers, talk about tq on demand, that shits there from the start:)

05-16-2006, 12:58 PM
nice tq~

05-16-2006, 01:03 PM
Just clear a doubt about the injectors, still stock ???

Mike TexaSS
05-16-2006, 01:11 PM
Stock 04 Z06 Injectors 28.8lbs per hr

05-16-2006, 01:18 PM
killer :devil:

mike c.
05-16-2006, 03:14 PM
real nice man! i did 463hp 413.8 tq mustang dyno with close to the same set up as you. i also still have stock 01 ws6 28.8 injectors.

05-16-2006, 03:42 PM

05-16-2006, 04:35 PM
wow, real nice.

05-16-2006, 04:52 PM
Nice numbers, what compression?

Patrick G
05-16-2006, 05:11 PM
Casey is a god and you guys spec'ed a really nice cam. Well done. Power everywhere!

05-16-2006, 05:13 PM
you guys are probalby at 110% duty cycle.

05-16-2006, 05:16 PM
I love that small/medium sized cams are making awesome power!

05-16-2006, 05:22 PM
Will this secret spec cam be sold? Did it clear on these obviously milled heads without flycutiing? If so, I'm interested!


05-16-2006, 05:34 PM
475RWHP/428 FLB
Was this with the cutouts open?

05-16-2006, 06:09 PM
The car is my little project. G-Force was nice enough to accommodate me with a few dyno runs earlier today - thanks guys.

I just wanted to clear up one item: the injectors are SVO30 and they are right at 80% duty cycle at WOT. The stock ones were on the edge with just the headers and a few bolt ons.

Yes the cut outs were open.

The cam is nothing special, just an XER ground to my specs.


05-16-2006, 06:35 PM
care to post injector duty cycle(or width) and respective afr?

05-16-2006, 06:43 PM
I'm glad Mike posted this. If didn't I was going to. It was very worthy of being shared. It's a very strong ride no doubt. This was also through the cats.

Kudos to ya Jeff. The attention to detail all paid off. You just gotta love!

05-16-2006, 07:49 PM
Sucks knowing people are out there making 100 HP more than me with very similar setups, less the 90/90.

Nice numbers though!

05-16-2006, 08:47 PM
Those are great numbers. I really like the cam being less than 230 degrees duration. I would love to have that combo in my Z06. :) Congrats. :cheers:


05-16-2006, 08:49 PM
really nice numbers

05-16-2006, 09:07 PM
Thanks guys - it sure is fun to drive.

I tried to optimize everything, so yes the heads were milled (ordered them from AFR that way). Yes I flycut the pistons. Compression worked out to be between 11.1 - 11.2.

As for inj duty cycle - it is 82% at 6800 RPM at 12.9 AFR. That is from HPT with an LC-1.


05-16-2006, 09:21 PM
Very impressive numbers with a small camshaft & through CATS :devil:

Congrats buddy :cheers:

Btw How much the heads were milled 62cc or 61cc ?


05-16-2006, 09:21 PM
not SAE #s tho?

Ben R
05-16-2006, 09:23 PM
Those numbers are SAE Corrected. The uncorrected numbers were even higher. Today was a good dyno day in Houston. :)

05-16-2006, 09:58 PM
The heads were ordered at 59cc, but when I ccd them all chambers where very close to 61.5cc.

And yes those are SAE #s: uncorrected numbers were 484.43 RWHP and 436.92 RWTQ. As noted above today was a nice day in Houston!


05-16-2006, 10:18 PM
I would change out the injectors just to be on the safe side. From what I understand, they don't spray as uniformly as they would under 80%. If that is the case, maybe u can pick up another pony or 2 there.

05-17-2006, 02:18 AM
82% duty at 6800rpm seems fine to me....

VERY strong numbers! Congrats!

05-17-2006, 01:09 PM
...Yes the cut outs were open...
...This was also through the cats...So, was it through the cats or were the cutouts open??? Or, are the cats before the cutouts :confused:

Mike TexaSS
05-17-2006, 01:24 PM
The cut-outs are after the cats.

05-17-2006, 03:59 PM
I have had several questions about the cutouts. I just fabbed up some 3" dumps right before the muffler flanges. It is tight, but after several thousand miles there are no bumps or rattles.


05-17-2006, 11:56 PM
That is a sweet set up. The electric cut-outs being available at the flip of a switch is sweet!

The most impressive part about this set-up is that you could add an EWP and short belt and exceed 485 rwhp.

Your #s are conservative by most standards.

Thanks Guys!

05-18-2006, 02:32 PM
Nice numbers! What octane where the numbers achieved on?

Mike TexaSS
05-18-2006, 03:31 PM
93 Octane

05-19-2006, 01:31 AM

05-19-2006, 12:31 PM
Awsome numbers!

05-22-2006, 12:44 PM
Very Good #'s You and I are like twins, but obviously fraternal, not identical. I guess a lot of power comes outta the Texas Tuners. Hell I drove all the way from Michigan, not once but twice. Love Lg Motorsports.