PRC stage 2.5 flow numbers!
PRC stage 2.5 flow numbers! Got my flow numbers in today from jason at Texas Speed. These are stage 2.5 PRC ls6 heads with 2.04/1.57 manley valves. I was looking for numbers in the 310 range but i'll take it 
Exhaust Intake
.200 119 .200 145
.300 160 .300 204
.400 190 .400 256
.500 207 .500 293
.600 218 .600 318
Exhaust Intake
.200 119 .200 145
.300 160 .300 204
.400 190 .400 256
.500 207 .500 293
.600 218 .600 318
Very strong, especially if on a 3.900 bore fixture. You should feel a big gain of power.
__________________
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.
They flowed more than my PRC Stage 3 Dart 225's with 2.080/1.60 valves did, I will be making a post REAL soon with the numbers. I got no flow sheet with mine, so I had them independently flowed, WAY low on the numbers.....
Scott (orange peel)
Since you haven't called or IM'd me about these issues your talking about I guess I'll check with you here. Can you shoot me the flow information you have & give me some specs on the flow bench used? The Dart heads have been doing very well for us & we've seen well over 40rwhp gains on cars we've tested them on. I'm wondering what results you have & how they compare to my tests here. If the heads do not perform as we advertise than we will build you another set. We have independent shops doing independent flow testing for us that I hope will get posted very soon.
We just began using a cnc valvejob machine that not only cnc cuts the valvejob, it also completely blends the cylinder head! This new method of finishing heads should allow for us to be completely consistant with our cylinder heads.
I look forward to seeing great results from you StreetStalker! I just received a phone call earlier today from GMMG that used our stage 1 LS6 heads to out power a well known competitors stage 2.5 heads while costing nearly half the cost!! 438rwhp 409 lb ft from a LS1 with our heads & a 228/230 camshaft!
Since you haven't called or IM'd me about these issues your talking about I guess I'll check with you here. Can you shoot me the flow information you have & give me some specs on the flow bench used? The Dart heads have been doing very well for us & we've seen well over 40rwhp gains on cars we've tested them on. I'm wondering what results you have & how they compare to my tests here. If the heads do not perform as we advertise than we will build you another set. We have independent shops doing independent flow testing for us that I hope will get posted very soon.
We just began using a cnc valvejob machine that not only cnc cuts the valvejob, it also completely blends the cylinder head! This new method of finishing heads should allow for us to be completely consistant with our cylinder heads.I look forward to seeing great results from you StreetStalker! I just received a phone call earlier today from GMMG that used our stage 1 LS6 heads to out power a well known competitors stage 2.5 heads while costing nearly half the cost!! 438rwhp 409 lb ft from a LS1 with our heads & a 228/230 camshaft!
__________________
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
Trending Topics
Originally Posted by StreetStalkerZ
Got my flow numbers in today from jason at Texas Speed. These are stage 2.5 PRC ls6 heads with 2.04/1.57 manley valves. I was looking for numbers in the 310 range but i'll take it
Exhaust Intake
.200 119 .200 145
.300 160 .300 204
.400 190 .400 256
.500 207 .500 293
.600 218 .600 318
Exhaust Intake
.200 119 .200 145
.300 160 .300 204
.400 190 .400 256
.500 207 .500 293
.600 218 .600 318
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Originally Posted by StreetStalkerZ
Got my flow numbers in today from jason at Texas Speed. These are stage 2.5 PRC ls6 heads with 2.04/1.57 manley valves. I was looking for numbers in the 310 range but i'll take it
Exhaust Intake
.200 119 .200 145
.300 160 .300 204
.400 190 .400 256
.500 207 .500 293
.600 218 .600 318
Exhaust Intake
.200 119 .200 145
.300 160 .300 204
.400 190 .400 256
.500 207 .500 293
.600 218 .600 318
Originally Posted by TXZ28LS1
those are really good numbers. hey guys, which makes more power the prc 5.3 or the new ls6? i know both are good heads...good job TSP..
Damn, you are kinda making me wish I would have went with bigger valves on my PRC Ls6 ers as well! And these heads make great power even through stock valves! I made 432rwhp 400rwtq baseline with the tune WAY off.
Originally Posted by TXZ28LS1
man 99blanco...yur car is a factory freak..putting that much hp with a little 224 cam...im sure that pissess off the big cam guys..lol...
I prefer keeping my car tame in Houston traffic..... I can't wait to see what kind of ET and power i make with them. It will be interesting to see what kind of numbers i put down with 11:1 comp. with a cam around the power level of a TRex. I'm looking to have the new setup together in the next few months and see what kind of power and ET it puts down.
Originally Posted by TXZ28LS1
man 99blanco...yur car is a factory freak..putting that much hp with a little 224 cam...im sure that pissess off the big cam guys..lol...
My only regret is that I can not afford a forged short block or I'd be having them build me one right now. IF TSP wants to sponsor my car, I'd be more than happy to go along with it. My car seems to react very well to Texas Speed's handy work, I'd be proud to display what their 408 can do for it!!
