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PRC 5.3l Stage 2.5 Heads & MS4 Dyno Results

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Old 04-20-2007, 11:05 AM
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Default PRC 5.3l Stage 2.5 Heads & MS4 Dyno Results

2001 Trans Am

Stock Bottom End
PRC 5.3l Stage 2.5 Cylinder Heads
MS4 Camshaft
SLP Long Tubes
GMMG Catback
ASP Underdrive Pulley
Stock LS6 Intake
Stock MAF
SLP Lid
10 Bolt Rear

Just wait until this thing gets a FAST INTAKE & 90mm combo!!

Old 04-20-2007, 11:24 AM
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Sick numbers, what head gasket, any flycutting necessary?
Old 04-20-2007, 11:51 AM
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DAMN those are sick #s
Old 04-20-2007, 12:52 PM
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Jon great numbers like always that thing gonna break 500rwhp with 90 setup,85Maf and Cutout.

0neMean01 I bet you cant wait to drive that thing.
Old 04-20-2007, 12:55 PM
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ATXCAMAROGUY I think flycutting is necessary those are 63cc if remember what Jason told me but with MS3 no flycutting needed.

But im sure Jon will correct me if im wrong.
Old 04-20-2007, 02:05 PM
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wow! What compression and did you have to flycut?

Great numbers for sure!
Old 04-20-2007, 02:19 PM
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Nice numbers! I need those heads!!!
Old 04-20-2007, 02:22 PM
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im surprised at how flat the torque curve is!
Old 04-20-2007, 04:03 PM
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What curve lol.
Very nice.
Old 04-20-2007, 06:18 PM
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Originally Posted by venom ws7
ATXCAMAROGUY I think flycutting is necessary those are 63cc if remember what Jason told me but with MS3 no flycutting needed.

But im sure Jon will correct me if im wrong.
Ahh I see, I don't know why I'm asking anyway I'm gonna have diamond pistons w/ valve reliefs
Old 04-20-2007, 09:09 PM
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What are some of the numbers? I can't see graph (stupid military firewalls).

Marty
Old 04-20-2007, 09:13 PM
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WOW nice numbers! get a ported 90mm and some Kooks or QTP headers and I bet you see damn near 500rwhp.
Old 04-20-2007, 09:32 PM
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What are the SAE corrected numbers???
Old 04-20-2007, 10:04 PM
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That's a sick torque curve. With a ported Fast 90/90 TSP will be posting those 500+ rwhp numbers...but with their heads and not the usual Trick Flows!
Old 04-20-2007, 11:30 PM
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Jon, have you guys done a back to back comparison w/ the stage 2.5 5.3 heads vs. the stage 2.5 ls6 heads, that would be pretty interesting to see.
Old 04-21-2007, 12:25 AM
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Very stout numbers jon & really sick TQ curve

peace
Old 04-21-2007, 12:50 AM
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Nice,

The owner of this car lives here in A-town..


Great job guys
Old 04-21-2007, 07:58 AM
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Were the heads milled anymore or were they the standard 63cc chambers?

DCR only shows to be about 8.1 with a .040 gasket and if I do the same heads/gasket with my Torquer 2 I'll be at 8.3 and I am worried about getting knock with our crappy 91 octane. I can't run a mix of race fuel, since this is a Daily Driver.

Thanks for the info, James.

Last edited by Dr. Jeckel; 04-25-2007 at 07:53 AM.
Old 04-21-2007, 08:19 AM
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Originally Posted by ATXCAMAROGUY
Jon, have you guys done a back to back comparison w/ the stage 2.5 5.3 heads vs. the stage 2.5 ls6 heads, that would be pretty interesting to see.

I second that. then swap cams and see what works better for which. tqrV3 vs MS4.

get working.
Old 04-21-2007, 09:19 AM
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Originally Posted by 2001 Pewter WS6
What are the SAE corrected numbers???
I too was wondering are those SAE corrected numbers ???

That Torque curve is sick, he's going to have power everywhere in the powerband. Sick, sick, sick !


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