PRC Stage 2.5 5.3 Heads - 488 RWHP 428 RWTQ
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Just got the car all finished up. The setup includes:
- PRC Stage 2.5 5.3 heads
- Fast 90 / 90 Setup
- Fast 39 lb Injectors
- SLP Underdrive and MAF
- 23x / 24x - .600 / .610 Cam
- Electric Water Pump
We ending up flycutting the pistons to allow for some extra clearance. That enabled us to surface the heads a little more to squeeze some extra compression out of the setup.
Jason, and all the guys at Texas Speed were a huge help in getting this thing tuned in and making great power. I was very impressed with the final numbers, these heads look and perform amazing.
After all the tuning and messing around with it, it ended up making 488 RWHP and 428 RWTQ.
I will have a graph hosted tomorrow night.
- PRC Stage 2.5 5.3 heads
- Fast 90 / 90 Setup
- Fast 39 lb Injectors
- SLP Underdrive and MAF
- 23x / 24x - .600 / .610 Cam
- Electric Water Pump
We ending up flycutting the pistons to allow for some extra clearance. That enabled us to surface the heads a little more to squeeze some extra compression out of the setup.
Jason, and all the guys at Texas Speed were a huge help in getting this thing tuned in and making great power. I was very impressed with the final numbers, these heads look and perform amazing.
After all the tuning and messing around with it, it ended up making 488 RWHP and 428 RWTQ.
I will have a graph hosted tomorrow night.
Last edited by Kryckter; 05-11-2007 at 12:45 AM.
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Originally Posted by SLP4CamaroSS
nice numbers did u put a g5x3 in it?
Yeh, its had that cam since it was a cam only car. Im looking at changing to a TSP grind soon.
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Damn dude nice numbers. I have my 5.3l (stg 2.5)heads and my fast 90/90 sitting in the room next to a tnt f2 kit waiting to go on. Numbers like these are making me wish I could install that **** tomorrow.
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Either something is up with whatever Dyno these cars are using...or my car sucks ***..
I have the MS3, and the same dam heads...90/90, all that BS, EWP...blabla and my #'s are in my sig...WTF!
Is the G5X3 that much more superior to the MS3???
This pisses me off so much I am contemplating changing set ups...
Nevertheless, NICE NUMBERS!
I have the MS3, and the same dam heads...90/90, all that BS, EWP...blabla and my #'s are in my sig...WTF!
Is the G5X3 that much more superior to the MS3???
This pisses me off so much I am contemplating changing set ups...
Nevertheless, NICE NUMBERS!
#9
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Originally Posted by erikthegoalie
Either something is up with whatever Dyno these cars are using...or my car sucks ***..
I have the MS3, and the same dam heads...90/90, all that BS, EWP...blabla and my #'s are in my sig...WTF!
Is the G5X3 that much more superior to the MS3???
This pisses me off so much I am contemplating changing set ups...
Nevertheless, NICE NUMBERS!
I have the MS3, and the same dam heads...90/90, all that BS, EWP...blabla and my #'s are in my sig...WTF!
Is the G5X3 that much more superior to the MS3???
This pisses me off so much I am contemplating changing set ups...
Nevertheless, NICE NUMBERS!
The MS3 has made some freak numbers on a few cars too. Nice numbers!.....but the dyno numbers of this car don't tell the whole story...take it to a track and see what it traps to validate them
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Originally Posted by erikthegoalie
Either something is up with whatever Dyno these cars are using...or my car sucks ***..
I have the MS3, and the same dam heads...90/90, all that BS, EWP...blabla and my #'s are in my sig...WTF!
Is the G5X3 that much more superior to the MS3???
This pisses me off so much I am contemplating changing set ups...
Nevertheless, NICE NUMBERS!
I have the MS3, and the same dam heads...90/90, all that BS, EWP...blabla and my #'s are in my sig...WTF!
Is the G5X3 that much more superior to the MS3???
This pisses me off so much I am contemplating changing set ups...
Nevertheless, NICE NUMBERS!
Joseph has a very strong car, he made 434 before the heads and now gained 55 more with heads and EWP, which is right on the money. He also used a thinner gasket and said the heads were milled a little more.
Sorry Joe...now lets see that graph!!!
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Killer combination of parts all working together!
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
![](https://ls1tech.com/forums/signaturepics/sigpic210_1.gif)
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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Congrats on an awesome combo! These heads have been putting down some really good numbers. I might have to add them to my setup soon. Can you tell us what gasket you used and about the milling? thanks.
-Al
-Al
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Originally Posted by TRU-2GM
those are very nice numbers...who did the flycutting?
Originally Posted by Mr.MartyStone
Was the fast setup out of the box or ported?
Originally Posted by STRIPSTAR
um, yeah I definately want to know how much was milled and the gasket size. Im laying out the same setup.
Originally Posted by Dr. Jeckel
Joseph has a very strong car, he made 434 before the heads and now gained 55 more with heads and EWP, which is right on the money. He also used a thinner gasket and said the heads were milled a little more.
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Originally Posted by STRIPSTAR
I think your off on the C/R. My calculations came to 11-1 with a 040 gasket and no mill. flycutting negative cc aside. Can you clarify for me thanks
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Originally Posted by Dr. Jeckel
I hate to be like this, but you get in every post where the 2.5's are used and just complain about your numbers with the MS3. You're still making better power than alot of other guys that have similar mods and no the MS3 is not really inferior to the G5X3. I understand you're depressed about your numbers, but don't go into other peoples posts and get off topic where people start trying to diagnose your problems. You have plenty posts already for that, so leave your problems there.
Joseph has a very strong car, he made 434 before the heads and now gained 55 more with heads and EWP, which is right on the money. He also used a thinner gasket and said the heads were milled a little more.
Sorry Joe...now lets see that graph!!!
Joseph has a very strong car, he made 434 before the heads and now gained 55 more with heads and EWP, which is right on the money. He also used a thinner gasket and said the heads were milled a little more.
Sorry Joe...now lets see that graph!!!
If you had spent the time, money and effort I did, on the same (more or less) set up, and made 25+ HP less, and a SHITLOAD less in torque, you'd be confused too, trust me..
I realize I bitch in every 5.3 thread...but WTF...
You're telling me a slight mill and a different gasket is the major factor here? I don't think so fellas...
I just have a factory UN-freak ...
Rant over- apology for the repeat hijacks, NICE numbers...rock on!
Erik
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Originally Posted by erikthegoalie
If you had spent the time, money and effort I did, on the same (more or less) set up, and made 25+ HP less, and a SHITLOAD less in torque, you'd be confused too, trust me..
I realize I bitch in every 5.3 thread...but WTF...
You're telling me a slight mill and a different gasket is the major factor here? I don't think so fellas...
I just have a factory UN-freak ...
Rant over- apology for the repeat hijacks, NICE numbers...rock on!
Erik
I realize I bitch in every 5.3 thread...but WTF...
You're telling me a slight mill and a different gasket is the major factor here? I don't think so fellas...
I just have a factory UN-freak ...
Rant over- apology for the repeat hijacks, NICE numbers...rock on!
Erik
Both of you guys need to hit the track and enjoy what you put together!
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Originally Posted by 02EBZO6
From the sound of things man your car made great numbers. Every dyno is going to be different. Our local fbody shop's dyno frequently reads -25~ rwhp that other infamous dynos from across the country. Dyno numbers, just like flowbench cfm readings can be easily skewed either direction. The only way to really tell the difference between a couple cars is to line em up or get them to a track with similar conditions and driver experience. Your car is no slouch, it's sad to see you are thinking about or already sold your setup. It was stout and had some good ET/MPH in it for sure.
The thread starter needs to get that thing to the track....sounds like tons of fun!![Devil](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_devil.gif)
The thread starter needs to get that thing to the track....sounds like tons of fun!
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I plan on taking it to a track, but since our local track is closed, and who knows when it is re-opening. I may need to plan a roadtrip to go run it.
I know the dyno this car made power on is within 1-3 RWHP of another local chassis dyno. For what its worth....