Holy Sh*t,prc Stage 1 Dyno Results!!!
Thread Starter
Teching In
Joined: Feb 2002
Posts: 46
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From: Texas
Holy Sh*t,prc Stage 1 Dyno Results!!! I don't believe it myself, and neither do the guys at TSP! They randomly took a set of LS6 heads (not for this dyno test) out of the pile to put on my Z28. I have the TSP true duals, 232/228 XER, LT's, UD pulley, TSP lid, and LS6 intake (stock for my '01). Now get this, before the heads the car put down 384 RWHP and 367 RWTQ. I'm not lying...after heads it put down 442 RWHP and 403 RWTQ! 
I honestly wouldn't have believed it myself if I didn't watch it all with my own eyes (porting, CNC valve job, assembly, head swap, before and after dynoing, etc.). I don't post often because I'm entertained by the same damn questions and pissing contests (ex. Is the TB Bypass Worth It?). I'm not going to post again because I could not care less what people are going to say about it. The fact is this "big-runner" head picked up over 50 RWHP and 36 RWTQ! These are their stage 1.0 stock-valved LS6's with the CNC valve job upgrade that cost just under a grand. They were installed with a set of Cometic .040" head gaskets, and everything else remained unchanged. I'm one happy MF! 
The worst part is that the budget heads are now going to cost me over $2,000 for a 12-bolt!
People can say what they want about all of the head dimensions (runner size, etc.), but I have proof that these bitches work. The guys at TSP should be posting the graph up tonight or tomorrow.
I honestly wouldn't have believed it myself if I didn't watch it all with my own eyes (porting, CNC valve job, assembly, head swap, before and after dynoing, etc.). I don't post often because I'm entertained by the same damn questions and pissing contests (ex. Is the TB Bypass Worth It?). I'm not going to post again because I could not care less what people are going to say about it. The fact is this "big-runner" head picked up over 50 RWHP and 36 RWTQ! These are their stage 1.0 stock-valved LS6's with the CNC valve job upgrade that cost just under a grand. They were installed with a set of Cometic .040" head gaskets, and everything else remained unchanged. I'm one happy MF! The worst part is that the budget heads are now going to cost me over $2,000 for a 12-bolt!People can say what they want about all of the head dimensions (runner size, etc.), but I have proof that these bitches work.
The guys at TSP should be posting the graph up tonight or tomorrow. Excellent power and torque. Can't wait to see your graph. Big props!
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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.
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.
LMAO Flash99!
Here's Jimmy's dyno graph guys.
Like Jimmy stated, we randomly picked out 2 individual heads out of the pile of heads getting put together & installed Jimmy's springs on them! These cylinder heads feature the competition valve job & flowed something around 254 @ .400" & 307 @ .600".
What people have to keep in mind is the PRC cylinder heads feature complete cnc porting & cnc controlled valve jobs. In other words there is no human interface that would change one cylinder head from performing different than the next.
People can talk down large runners all they want, but the bottom line is these things are making awesome power & selling for under $1000!!
With results like that it's no wonder the competition is worrying!!!
Here's Jimmy's dyno graph guys.
Like Jimmy stated, we randomly picked out 2 individual heads out of the pile of heads getting put together & installed Jimmy's springs on them! These cylinder heads feature the competition valve job & flowed something around 254 @ .400" & 307 @ .600".
What people have to keep in mind is the PRC cylinder heads feature complete cnc porting & cnc controlled valve jobs. In other words there is no human interface that would change one cylinder head from performing different than the next.
People can talk down large runners all they want, but the bottom line is these things are making awesome power & selling for under $1000!!
With results like that it's no wonder the competition is worrying!!!
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
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Originally Posted by Jason 98 TA
LMAO Flash99!
Here's Jimmy's dyno graph guys.
Like Jimmy stated, we randomly picked out 2 individual heads out of the pile of heads getting put together & installed Jimmy's springs on them! These cylinder heads feature the competition valve job & flowed something around 254 @ .400" & 307 @ .600".
What people have to keep in mind is the PRC cylinder heads feature complete cnc porting & cnc controlled valve jobs. In other words there is no human interface that would change one cylinder head from performing different than the next.
People can talk down large runners all they want, but the bottom line is these things are making awesome power & selling for under $1000!!
With results like that it's no wonder the competition is worrying!!!
Here's Jimmy's dyno graph guys.
Like Jimmy stated, we randomly picked out 2 individual heads out of the pile of heads getting put together & installed Jimmy's springs on them! These cylinder heads feature the competition valve job & flowed something around 254 @ .400" & 307 @ .600".
What people have to keep in mind is the PRC cylinder heads feature complete cnc porting & cnc controlled valve jobs. In other words there is no human interface that would change one cylinder head from performing different than the next.
People can talk down large runners all they want, but the bottom line is these things are making awesome power & selling for under $1000!!
With results like that it's no wonder the competition is worrying!!!
Now you are a VERY good salesmen. I would order these from you in a heart beat if I already didnt have some Patriot LS6 Stage II heads. Again nice gains. If I was your competition I would be worrying too!
Can you post a dyno with the correction type??? SAE??? STD??? uncorrected???
11 Second Club
Joined: Aug 2004
Posts: 891
Likes: 0
From: minneapolis,mn
Well I had my new heads (prc stage 1's) at my local shop tonight and they ripped the **** out of them oh those runners are way too big and the tooling does not look very good to him. But at the end of our conversation tonight he said he expects my car to do 430-435 so with him saying that at the end of the night he's saying I'll gain around 50 also. So he even expects them to work well. But of course he says his would work better.
Is the competition valve job something new I didn't see that when I ordered mine a month ago.
Is the competition valve job something new I didn't see that when I ordered mine a month ago.
Now this one I can believe since there are heads on the car.
Great Numbers! LS6 Heads are great heads, I've seen a few other local cars with ported LS6 heads and they perform well too.
If I was in the market for heads, I'd buy them, great results for not a lot of money!
I'm going to bet this was a MAF tuned car.
Congrats and enjoy that F>cking Beast!!!
Great Numbers! LS6 Heads are great heads, I've seen a few other local cars with ported LS6 heads and they perform well too.
If I was in the market for heads, I'd buy them, great results for not a lot of money!
I'm going to bet this was a MAF tuned car.
Congrats and enjoy that F>cking Beast!!!
The competition valve job is a new option. 
It helps out exhaust flow a lot & intake flow a little bit as well! I'm thinking it's going to be hard to keep Jimmy out of his car for a while!
It helps out exhaust flow a lot & intake flow a little bit as well! I'm thinking it's going to be hard to keep Jimmy out of his car for a while!
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
The dyno results are corrected. I'll get the complete dyno sheet scanned when we get back to the office
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Originally Posted by gillbot
I was just looking over these heads yesterday and contemplating a purchase!!!
Are these available assembled with dual springs?
Are these available assembled with dual springs?
As for a large-chamber head, we could setup a set of 6.0L heads using the same ports. Only difference is you'd have a 72cc chamber instead of the LS6's 64cc.
The price would be the same as the LS6 for a set of 6.0L heads setup respectively.Let us know if y'all have any other questions!
Trevor
Texas Speed & Performance
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