PRC 2.5 5.3's. What should I expect?
05-09-2008, 12:29 AM
#1
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PRC 2.5 5.3's. What should I expect? I'm currently running the X1(230/228 .592/.571 112lsa) w/LT's, M6 and am going to be putting these heads on. Any ideas on what kind of numbers I should put down??
Last edited by mrtosh; 05-09-2008 at 01:02 AM.
05-09-2008, 09:10 AM
#3
What power does the car make currently? We typically see 40-45rwhp depending on milling with the install or PRC Stage 2.5 5.3l heads 
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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
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05-09-2008, 11:42 AM
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Nah his car is slow, I'd say 350rwhp MAX! Psych! By the way to anyone who asked it's a 2004 GTO...LS1...I thought you were going to go with the 1.5's? I remember bringing up the 2.5's to you, because that's really all I see people running, not many 1.5's. When are you planning on getting them? Already ordered? Probably stick you around 420-430rwhp, but I guess it really depends on where your #'s are right now. You'll Have no problem at all getting sideways, not like you do anyway 
You should get it dyno'd soon, before the heads, and then after. I'd go with ya to see what I am making too, we could probably get a group to go and save some money on the runs.
Word.
You should get it dyno'd soon, before the heads, and then after. I'd go with ya to see what I am making too, we could probably get a group to go and save some money on the runs.
Word.
05-09-2008, 04:23 PM
#9
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Cutout's open
http://youtube.com/watch?v=Zn9ALpql4bk
Corsa
http://youtube.com/watch?v=4QBNYWbQGuA&feature=related
Nah his car is slow, I'd say 350rwhp MAX! Psych! By the way to anyone who asked it's a 2004 GTO...LS1...I thought you were going to go with the 1.5's? I remember bringing up the 2.5's to you, because that's really all I see people running, not many 1.5's. When are you planning on getting them? Already ordered? Probably stick you around 420-430rwhp, but I guess it really depends on where your #'s are right now. You'll Have no problem at all getting sideways, not like you do anyway
You should get it dyno'd soon, before the heads, and then after. I'd go with ya to see what I am making too, we could probably get a group to go and save some money on the runs.
Word.
You should get it dyno'd soon, before the heads, and then after. I'd go with ya to see what I am making too, we could probably get a group to go and save some money on the runs.
Word.
It needs to be in my car! 
05-09-2008, 05:50 PM
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Yeah you should bring it over tomorrow morning. I will be there with my car. It's a mustang dyno so it will read low, but you could convert it to see what it should be a on dynojet. He's gonna dyno mine to see how much is gained from the tune. I'm very excite (borat)!!!
Last edited by SpeedWorld; 05-09-2008 at 11:12 PM.
05-09-2008, 06:17 PM
#15
You'd probably pick up 40 rwhp with unmilled 2.5s and 45 rwhp with milled, higher compression versions.
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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.
