Angie

iTrader: (4)

We just got finished with a local customer's '98 SS installing GTP Stage 2 heads. He has had our Thunder 224 cam (112 lsa) for a while now, so it was interesting to see what the gain was when upgrading to the heads. We used 5.3L Truck heads in order to bump the compression slightly.

The car has been dynoed several times, so I'm including a couple of comparison graphs.

The original dyno was done with just bolt-on's (last summer) through the 10 bolt with 3.42 gears (323.9 RWHP, 342.9 RWTQ.) He now has a 12 bolt w/ 4.10 gears, stock driveshaft, steel flywheel, stock wheels, through an open Borla (no cutout, etc.) (yadda, yadda, ie: no dyno tricks.)

The "cam only" graph was made right before we did the install so the comparison would be as close as possible. (383.5 RWHP, 381.5 RWTQ). No changes were made to the car except for the heads and custom tuning (done in-house)

Dyno Bolt-on's vs Thunder Racing 224 Cam w/ GTP S2 Heads

Dyno w/ Thunder Racing 224 Cam (12 bolt) vs. Same setup w/ addition of GTP S2 Heads

<img src="gr_grin.gif" border="0"> WOW <img src="gr_grin.gif" border="0">

On the very first shot the car pulled 435 rwhp. After tuning w/ the wide-band (LS1 Edit) the result was 443 RWHP, 421.3 RWTQ

Basically, that's a NET GAIN of 60 RWHP / 40 RQTQ over the HP w/ just our camshaft. It's a 120 RWHP / 79 RWTQ net gain over the bolt-on's only setup.

Mods on the car include:
- Thunder Racing 224/224 .561 / .561 112 lsa Camshaft
- GTP Stage 2 Heads/ Thunder Racing assembled w/ Comp 987 Double Springs & Comp 776 Titanium Retainers)
- Grotyohann long tube headers
- 3" Y-pipe
- Borla Cat-Back (opened)
- ASP Pulley
- Thunder Racing ported TB
- LS6 intake
- stock maf ends
- And, we changed the oil w/ Royal Purple after the cam change <--maybe that's the trick!! <img src="gr_grin.gif" border="0">

Needless to say, we are pretty happy w/ the results as was both the customer & Craig @ GTP!

Track times to follow <img src="gr_grin.gif" border="0">

Angie

Sears

Chris called me today and told me, and all I could say is that is F-ing AWESOME!!! That is monster gain from the heads. <img src="gr_eek2.gif" border="0"> That is one well matched setup! <img src="gr_grin.gif" border="0"> Hopefully he will come to Hattiesburg on Sunday with me to race. <img src="gr_images/icons/wink.gif" border="0">

Congrats to Thunder/GTP and Chris too! <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

[ February 15, 2002: Message edited by: Jsears8 ]</p>

fatboy

wow! thats the H/C combo ive been thinking about getting. congrats on the awesome numbers <img src="graemlins/gr_hail.gif" border="0" alt="[hail]" /> <img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />

jmX

If yall send me a "test set" of GTP heads I'll run my ARE heads car on the dyno, then swap the GTP's on and run them on the dyno for a comparison and post the graph. I'll keep em if they make more.

Come on..ya know ya wanna take me up on the offer. <img src="gr_grin.gif" border="0"> LOL.

RUF SS

Congrats on the awesome numbers!!

I cant wait to see how my TR 227/227 do in my 382 stroker <img src="gr_stretch.gif" border="0">
<img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" />

ChrisB

Congratulations, sounds like you have a killer setup!


Chris

Silver Pig

Thats It? <img src="images/icons/confused.gif" border="0"> <img src="gr_grin.gif" border="0">

Sean(Pig)

Jason99T/A

iTrader: (21)

KICK *** numbers! Congrats to all involved. 440+ is insane for a heads/cam car!

I think it was the Royal Purple oil that made the difference. LOL <img src="gr_tounge.gif" border="0">

Crazyquik

[quote]Originally posted by Angie:

It's a 120 RWHP / 79 RWTQ net gain over the bolt-on's only setup.

<hr></blockquote>


Thats an entire Honda Civic worth of gain <img src="gr_eek2.gif" border="0"> <img src="gr_eek2.gif" border="0">

CRZY747

Hell ya, that is some nice gains, especialy with a 12 bolt and 410's, dam impressive, I guess that GTP kicks some *** with those heads hu. Way to go Craig, I mean dam nice numbers, before long all the houston people will be comming to Thunder to get there car done.


Well done Thunder Racing and GTP what a kick *** combo

JET

Will have to bring the car to cajon country to get my car done <img src="gr_grin.gif" border="0"> <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" />

Train Rail

i made my mind up, i will be calling to get those heads soon after i get done putting the suspension parts on i just ordered from you !!!! by the way were those dual springs on those heads? thanx eric <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> <img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />

Coach 02 A3 Z/28

iTrader: (10)

Great Stuff, I can't wait for my Heads/Cam from the mighty Thunder Racing ( April 1st baby).
I would really like to see the track performance numbers.
Great job for all of those involved <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

Coach 02 Z28

StreetStalkerZ

iTrader: (1)

Those are some wickey gains from heads and tuning. That was awsome and maybe i can gain a bit from heads later on in the year <img src="gr_stretch.gif" border="0">

Bear

iTrader: (1)

Man those are some serious numbers! <img src="gr_eek2.gif" border="0"> That is one amazing combo. Nice to see that the numbers are coming up across the board for all the sponsors. Soon we will be at 480 or 500 rwhp with some H&C setups. <img src="gr_tounge.gif" border="0"> Good job and good luck.

Bad1le

WHOA!!! I am so glad I went w/ the 224/224 w/ gtp stage 3 heads <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> I hope to have numbers similar to those after tuning.....get some track times asap!
AJ

Nine Ball

iTrader: (38)

Badass numbers Thunder! Just another FINE example of how you don't need a monster cam to make good power in these motors. I still like those cams between 221-224 intake duration.

Notice one thing in common with all of these higher than "normal" dyno figures coming out lately? LS1-EDIT

I expect the "normal" output values from all possible combinations will be jumping up a bit for the next few months, gotta love that!

Tony

bigSS

[quote]Originally posted by Bear:
<strong> \ Soon we will be at 480 or 500 rwhp with some H&C setups. <img src="gr_tounge.gif" border="0"> </strong><hr></blockquote>

<img src="gr_eek2.gif" border="0"> That would be kick ***! I'd say it's possible, but your gonna need a bigger cam. Isn't there a TR227 or something? Perhaps that with the GTP3 heads, ported/polished holley intake and LS1 EDIT - maybe we can get close to 500rwhp. Thats nuts.

<img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" />

JS

iTrader: (4)

Geoff/Angie/Paul Congrats on the KILLER setup..
That thing is gonna fly.Thunder Racing Rocks!!!

JS
CARTEK S2X H/C
DYNOED 432.7RWHP/388.4RWTQ SAE Corrected
Threw an Auto/3.73's

ToplessTexan

[quote]Originally posted by Nine Ball:
<strong>Notice one thing in common with all of these higher than "normal" dyno figures coming out lately? LS1-EDIT</strong><hr></blockquote>

Point taken although LG Motorsports' G5 numbers are not LS1-Edit tuned.

Brownie

Whoah!! <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> Congrats TR.