INFO on TSP PRC Stage 2.5 heads
11-13-2005, 01:23 AM
#2
TECH Senior Member
Good heads for the price. Good port job. Good parts.
Perform as advertised, I gained 32 rwhp on a N20 tune (little rich and 25* timing), so more in there on NA tune. (224/220 cam)
Best part also is good customer service from TSP who now does all the jobs in house (mine were finished at Racetech- earlier version) so they should be even better now.
Perform as advertised, I gained 32 rwhp on a N20 tune (little rich and 25* timing), so more in there on NA tune. (224/220 cam)
Best part also is good customer service from TSP who now does all the jobs in house (mine were finished at Racetech- earlier version) so they should be even better now.
11-13-2005, 07:57 AM
#4
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From GMHTP Magazine 1/06
Precision Race Components and Texas Speed and Performance are two faces of the same company, so don't get confused this particular 5.3 head package goes for $1,529 and includes 2.04 and 1.575 inch stainless Steel valves. larger valves are available if the customer wishes to upgrade to stage 3 package. This company's heads are sold outright as new castings, so no core swap is involved though Precision Race Components will gladly port castings a customer supplies as well. All heads are hand finished, bowl blended, assembled, decked, and flow tested by a full time cylinder-head specialist trained by the School of Automotive Machanics.
Combustion Chamber cc: 62
Approximate compression: 10.7:1
Intake cc: Customer specified
Precision Race Components and Texas Speed and Performance are two faces of the same company, so don't get confused this particular 5.3 head package goes for $1,529 and includes 2.04 and 1.575 inch stainless Steel valves. larger valves are available if the customer wishes to upgrade to stage 3 package. This company's heads are sold outright as new castings, so no core swap is involved though Precision Race Components will gladly port castings a customer supplies as well. All heads are hand finished, bowl blended, assembled, decked, and flow tested by a full time cylinder-head specialist trained by the School of Automotive Machanics.
Combustion Chamber cc: 62
Approximate compression: 10.7:1
Intake cc: Customer specified
11-13-2005, 12:36 PM
#7
I can shift faster than you.
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I am using these on my '00 Trans Am that serves as my daily driver. I made a few posts regarding flow #s, pictures, and dyno #s. Here are the links:
https://ls1tech.com/forums/generation-iii-internal-engine/384353-prc-2-5-heads-initial-impressions-flow-numbers-inside.html
https://ls1tech.com/forums/dynamometer-results-comparisons/392626-406rwhp-390rwtq-prc-2-5-heads-tr-cheater-cam-stock-manifolds-cats.html
I couldn't be happier with the price, quality, and performance of these heads. Jason @ PRC was great to deal with and the heads were shipped in a very timely manner.
I'll be adding headers to the car next week. That should wake things up a bit.
Jason
https://ls1tech.com/forums/generation-iii-internal-engine/384353-prc-2-5-heads-initial-impressions-flow-numbers-inside.html
https://ls1tech.com/forums/dynamometer-results-comparisons/392626-406rwhp-390rwtq-prc-2-5-heads-tr-cheater-cam-stock-manifolds-cats.html
I couldn't be happier with the price, quality, and performance of these heads. Jason @ PRC was great to deal with and the heads were shipped in a very timely manner.
I'll be adding headers to the car next week. That should wake things up a bit.
Jason
