PRC 2.5 59cc heads before and after dyno #s
04-27-2009, 07:55 AM
#1
PRC 2.5 59cc heads before and after dyno #s Guys I know when I was searching on these heads it was hard to find alot of info with a setup like mine. I figured maybe this thread would be valuable to others since I have solid before and after dyno #s.
My initial setup was stock heads with a TR224 114 cam, LS1 manifold, stock lifters, Pacesetter LT ORY and a Hooker CB. The car put down 368 HP & 358 TQ on a Dynojet.
New setup is TSP PRC 5.3 heads milled to 59cc(TSP might know the exact compression) LS6 manifold, Powerbond UD pulley, LS7 lifters and trays. Also used stock GM gasket kit. After tune at Race Proven Motorsports again on a Dynojet it put down 414 HP & 395 TQ with a nice flat torque curve.
Now I know there are TONS of guys faster out there but for my needs this car pulls HARD.
I attached a pic of the dyno sheet, I hope this hopes those searching for PRC 2.5 head performance!
My initial setup was stock heads with a TR224 114 cam, LS1 manifold, stock lifters, Pacesetter LT ORY and a Hooker CB. The car put down 368 HP & 358 TQ on a Dynojet.
New setup is TSP PRC 5.3 heads milled to 59cc(TSP might know the exact compression) LS6 manifold, Powerbond UD pulley, LS7 lifters and trays. Also used stock GM gasket kit. After tune at Race Proven Motorsports again on a Dynojet it put down 414 HP & 395 TQ with a nice flat torque curve.
Now I know there are TONS of guys faster out there but for my needs this car pulls HARD.
I attached a pic of the dyno sheet, I hope this hopes those searching for PRC 2.5 head performance! 
04-27-2009, 09:14 AM
#2
That's a really big gain. It's a shame you don't have a before and after dyno overlay. That would really be helpful.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
04-27-2009, 09:50 AM
#5
Nice numbers, Richard! Your static compression with a 59cc, GM MLS gasket, and no valve relief would be about 11.4:1. It would have been nice for sure to see the before/after over-laid! But no worries....just enjoy your new-found power! 
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04-27-2009, 10:11 AM
#6
Good job bro! If you ever need a ported fast combo for that thing give us a call!! We'll take good care of you!!
Have fun with that thing!!!
Have fun with that thing!!!
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Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
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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
04-27-2009, 11:35 AM
#8
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Man that is a really nice symmetrical HP/TQ curve. I like the way it hangs on from 5500-6500 RPM's. Very well-balanced power curve.
Everyone is going to ask you if you are sticking with that cam, or will you get the itch to see what a somewhat 'bigger' cam might do with that added compression? Running fine on high octane?
Personally, I like that combo. Congrats.
..WeathermanShawn..
Everyone is going to ask you if you are sticking with that cam, or will you get the itch to see what a somewhat 'bigger' cam might do with that added compression? Running fine on high octane?
Personally, I like that combo. Congrats.
..WeathermanShawn..
04-27-2009, 01:24 PM
#9
This is it for the car, I am done and I can gurantee you that. There will be no further mods, she is a weekend crusier. I plan on keeping the car forever, I don't want to be that 50+ year old guy who complains about giving up his childhood muscle car and regretting it. But seriously, this is it as far as performance mods go.
04-27-2009, 02:38 PM
#12
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Those are good numbers, gives me something to comapare to, ill be doing the same heads milled to 59cc, no UD pulley but I have a FAST 78 TB. SO hopefully Ill be right there with you.
04-27-2009, 02:51 PM
#13
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This is it for the car, I am done and I can gurantee you that. There will be no further mods, she is a weekend crusier. I plan on keeping the car forever, I don't want to be that 50+ year old guy who complains about giving up his childhood muscle car and regretting it. But seriously, this is it as far as performance mods go.
i had the TR220 on a 114lsa,good little cam..as far as off the shelf cams go,Thunder Racing is hard to beat..
but knowing what i do now i would go with something along the lines of a 220/224 111 lsa..
congrats..
04-27-2009, 11:17 PM
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nice!!!
It gives me something to look forward to
.
I've got the same heads on the way for my TBSS. 224/230 112+4 cam though. It put down 397/395, so I'd be interested in seeing what/where the power gains are.
It gives me something to look forward to
. I've got the same heads on the way for my TBSS. 224/230 112+4 cam though. It put down 397/395, so I'd be interested in seeing what/where the power gains are.
04-27-2009, 11:23 PM
#17
The car drives just like the curve looks on paper, and by that I mean the torque really pulls the car strong with no hesitation across the powerband. I drove my neighbor in it today on the highway for a 50 mile roadtrip, and he was impressed by the fact that everytime I downshifted she didn't hesitate or skip a beat, the car accelerated strong throughout the powerband everytime.
04-28-2009, 07:39 AM
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