StreetStalkerZ

iTrader: (1)

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

Patrick G

iTrader: (14)

Very strong, especially if on a 3.900 bore fixture. You should feel a big gain of power.

-Joseph-

iTrader: (12)

I'm thinking that maybe I should upgrade my stock valves! Mine were about 10-14 less at peak with stock valves on my LS6 heads.

Orange Peel

iTrader: (20)

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.....

91z28-350

Intake runner volume?

Jason 98 TA

iTrader: (4)

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!

Orange Peel

iTrader: (20)

I just got the results today Jason, I will make a new post with them right now, I'm not mad, just concerned....

1QuickT-A

iTrader: (12)

I'm not saying that those numbers are 'tainted', but have you thought about having the heads independantly flow tested by another shop? I would highly suggest that you do that just to back TSP's numbers..

WKMCD

iTrader: (2)

That's right in there with my PRC 2.5R's. Nice looking heads from Jason. I run a 230-236 112 XE-R 90/90 and all bolt-ons on my stock bottom and run 460-470 RWHP.

TXZ28LS1

iTrader: (5)

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..

99blancoSS

iTrader: (115)

my numbers are in my sig w/tr224 and 5.3 PRC heads from TSP. I dont think you can go wrong with either head but the ls6 heads are less expensive. Maybe a little less power, but not a lot less would be my guess.

cantdrv65

iTrader: (3)

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.

slt200mph

iTrader: (42)

to the top

TXZ28LS1

iTrader: (5)

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...

cantdrv65

iTrader: (3)

Im only using a 228/228 XER cam myself. I prefer keeping my car tame in Houston traffic.....

StreetStalkerZ

iTrader: (1)

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.

99blancoSS

iTrader: (115)

Cam only with a so-so tune I put down 375/375. Honestly I think I'm within the boundaries of what the cam should produce with a good set of heads and a proper dyno tune on a mustang dyno. I know personaly that it matched the output and out torqued an fm13 with almost indentical mods. Except that the fm13 car is an 02 mine is a 99 and he has tea heads vs my TSP/PRC heads. Both are 5.3's. Texas Speed and Performance puts out a damn good product if you ask me.
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!!