All New Version 2 PRC 5.3l Cylinder Head Pics!
04-10-2008, 11:17 AM
#22
It's going to be hard for them to give exact HP increases for car specific as each one is differenlty modded, let alone different HP levels from the factory.
The best accuracy you can ask for on this is really to say "given the best case scenario, how my extra HP over the 1st version stage 2.5 PRC 5.3l heads will the new ones yeild?", meaning where the heads were the biggest factor in the setup to make potential HP. Then we can get a best case scenario.
I doubt they can just quote you an exact number like "with the MS4 cam only you will gain 9 RWHP with the version 2 over the version 1". If they did, I would be skeptical.
The best accuracy you can ask for on this is really to say "given the best case scenario, how my extra HP over the 1st version stage 2.5 PRC 5.3l heads will the new ones yeild?", meaning where the heads were the biggest factor in the setup to make potential HP. Then we can get a best case scenario.
I doubt they can just quote you an exact number like "with the MS4 cam only you will gain 9 RWHP with the version 2 over the version 1". If they did, I would be skeptical.
04-10-2008, 03:40 PM
#25
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So what are the flow numbers for the intake and exh for these vs. the previous version? Can you post the whole flow sheet for comparisons please, not just peak.
They look real purdy!!
They look real purdy!!
Looks good though. +1 for TSP. 
Can't wait to see some dyno & track results. And to see how the flow under the curve 
04-11-2008, 05:47 PM
#32
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Guys the previous version of the 5.3l head is still very nice! I would not replace my older PRC 5.3l heads with the new version. Both setups work really well, we just updated the PRC heads with a few new features. 
There's definately no doubt the leader in budget minded performance cylinder heads!
We're working on package pricing for the 2.5R 2.055 / 1.60 valve setup right now!!
There's definately no doubt the leader in budget minded performance cylinder heads!
We're working on package pricing for the 2.5R 2.055 / 1.60 valve setup right now!!
How much of an upgrade would these be over the first gen PRC's? I have the production run before you cut pretty logos in them.
Justin
EDIT: OOPS IT LOOKS LIKE CALL BEAT ME TO MY QUESTION. I NEED TO PAY ATTENTION TO OTHER POSTS BETTER.
04-12-2008, 03:19 PM
#37
Just asked Jason to hold my order of the stage 2.5s and will most likely upgrade to the "R" version as long as the chambers are the same size...maybe get a little extra hp with my swap, I will update as soon as I get all of may parts with some pictures and eventually a dyno sheet after I install all of it.
04-14-2008, 10:02 AM
#39
Thanks for the support guys! We're already shipping this new head to customers!!
__________________
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
