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From PRC 5.3 & Unported FAST 92 >> to >> PRC 215 & Ported FAST 102 ...... worth ?

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Old 05-27-2011, 08:30 AM
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Default From PRC 5.3 & Unported FAST 92 >> to >> PRC 215 & Ported FAST 102 ...... worth ?

Hey,

My 02 SS M6 dynoed 434 rwhp / 411 rwtq last time with the current setup

Engine 02 LS1

- PRC 5.3 Stg 2.5 milled to 59cc | SCR is ~ 11.2:1
- EPS 222/226 115 lsa
- Mahle Forged Piston 3.898"
- Eagle Forged Rods 6.125"
- Stock Crankshaft

Other Bolt-Ons

- Uported FAST 92/92
- ZO6 MAF
- TSP 1 7/8" headers | Custom ORY | SLP LM1
- SLP U/D Pulley

Here is the dyno graph making 428 rwhp / 410 rwtq with cutout closed



I'm really happy with the setup and the car feels great with the feeling of power everywhere , Now I would like to upgrade the heads to PRC 215 milled to 59cc & Mamofied 102mm FAST intake along with the 102mm TB since my friend give me a good deal for the PRC 5.3 and 92mm intake

Actually I'm not looking for dyno numbers, I need really gains in the street

So do you think I will notice the gains in the street regardless of dyno numbers ? If yes , does is worth spending the money on that ?
Old 05-27-2011, 12:00 PM
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PRC 215 heads are new so you cannot see many results for them

But no doubt it will out perform the PRC 5.3 heads .. one of TSP should guide you
Old 05-27-2011, 09:55 PM
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You should definitely see gains going from 5.3 heads to the 215 and also see gains stepping up to a 102 fast. I would just keep the fast 92 and just swap the heads.
Old 05-27-2011, 10:14 PM
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Why not run the New AFR 215's? Just curious
Old 05-28-2011, 07:37 AM
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The no brainer answer to your question is: YES, IT WORTH IT

I will be very interested to know what kind of power you will be making with a Mamofied 102 FAST and PRC 215 with all the required supporting mods (injectors, 1 7/8" LT's, UD pulley, EWP, ....etc) on a stock LS1 short block.

Those heads are as good as TFS 215 and AFR 215 but they are not as popular.

With a custom cam (obviously bigger than the cam you have now), I guess that you will be in ballpark of 490rwhp+

Good luck with your build.



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