Texas Speed LS7 PRC 285 Heads
10-03-2010, 08:56 AM
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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....
10-03-2010, 11:17 AM
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10-03-2010, 11:51 AM
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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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10-03-2010, 12:17 PM
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10-03-2010, 02:53 PM
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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!
10-03-2010, 03:07 PM
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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?
10-03-2010, 03:15 PM
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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
10-03-2010, 04:04 PM
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10-04-2010, 12:08 AM
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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!
10-04-2010, 01:58 AM
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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; 10-04-2010 at 02:10 AM.
10-04-2010, 02:31 AM
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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?
10-04-2010, 10:13 AM
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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!