Texas Speed LS7 PRC 285 Heads
Texas Speed LS7 PRC 285 Heads Just wanted to give a shout to Texas Speed for the PRC 285 LS7 heads I recently received from them. While I did experience some drama surrounding the spring options, there is little doubt these are some of the best flowing/reasonably priced heads for LS applications....the quality and design is first class and I am extremely impressed....so was my engine machinist who is usually very reserved in his compliments....
Name just about any name brand (or GM head) out there. While I haven't had my set on a flow bench, the broadcast flow numbers on intake @ over .700" lift are 415 cfm. I'm running a smallish solid roller but should still see close to 400 cfm.....
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400 CFM ? 
That's HUGE! What displacement engine are they going on?
When you say a "smallish" solid roller, how small do you actually mean?
I have never heard of a "smallish solid roller"...
That's HUGE! What displacement engine are they going on?
When you say a "smallish" solid roller, how small do you actually mean?
I have never heard of a "smallish solid roller"...
They are going on a Bill Mitchell Warhawk 454....11:1 forged,Callies crank/rods,ARE dry sump, port injection nitrous on a Perf Ind sheet metal intake, Wilson 105,Jesel shaft rockers, Crane 256/260 714"/714" on a 113CL. I have a G-Force 101 four speed...still need clutch and QT bellhousing. Everything going in a tubbed 69 Camaro....getting really close!
We used these on a stock cube LS7 build I did for a local gentleman last year. With a hydraulic LS7R-ish cam and a GM LS7 intake, it made 571 to the wheels through the full exhaust. Very nice street car.
I was reading about your present Warhawk build.....I like the Jesel valvetrain components but....why not a solid cam? With all of the high end parts in your build up, I would assume you are going to run a shaft rocker setup? Don't want the hassle of periodic valve adjustment?
A Bill Mitchell 454....4.125" bore, 4.250" crank, 6.560" rods...all good parts. I used to have a BDS blown 540 BBC which made about 1000 HP. Hope my new engine puts out around 750 HP naturally aspirated...I am plumbing my intake for a direct port nitrous setup as well
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They are going on a Bill Mitchell Warhawk 454....11:1 forged,Callies crank/rods,ARE dry sump, port injection nitrous on a Perf Ind sheet metal intake, Wilson 105,Jesel shaft rockers, Crane 256/260 714"/714" on a 113CL. I have a G-Force 101 four speed...still need clutch and QT bellhousing. Everything going in a tubbed 69 Camaro....getting really close!
Dyuuuum! That's going to be a naaaaasty engine!
TSP sells the PI head as an option but it appears they use their own CNC port program to achieve 400+cfm.
Last edited by Sam88Gta1; Oct 4, 2010 at 02:10 AM.
Staging Lane
Joined: Sep 2008
Posts: 58
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The LXR-PS7 Performance Induction LS7 305cc head flows very similar to a stock LS7 GM head. After dealing with PI (Cary) on this set of heads I will never buy another product from them.
TSP sells the PI head as an option but it appears they use their own CNC port program to achieve 400+cfm.
TSP sells the PI head as an option but it appears they use their own CNC port program to achieve 400+cfm.
Thnx for the info.
Btw, would you happen to have a TSP vs WCCH info?
Thanks for the feedback guys! Let us know what kind numbers they make on the dyno and track!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!