PRC Stage 2.5 5.3l Heads & MS3 Dyno Results
01-27-2009, 05:20 PM
#1
PRC Stage 2.5 5.3l Heads & MS3 Dyno Results Here's a recently finished PRC Stage 2.5 / MS3 combo for you guys to checkout!
Mods:
01 LS1 F-Body
Pacesetters
Off-Road Y
Lid
Pulley
PRC Stage 2.5 5.3l Heads
TSP MS3 Camshaft
Mods:
01 LS1 F-Body
Pacesetters
Off-Road Y
Lid
Pulley
PRC Stage 2.5 5.3l Heads
TSP MS3 Camshaft
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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
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
01-27-2009, 05:28 PM
#2
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I can't read the graph too well on my phone.. What did it put down? Also, do you think the stock injectors were holding back some potential? I assume you got it tuned? Auto or 6 speed?
Hopefully we can avoid any dyno sheet controversies on this one!
01-27-2009, 05:34 PM
#4
I assume it's a 6sp, and the numbers were 445hp/410tq.
Also curious to the injector question as well as the stock FP as there wasn't an AF reading on the bottom of graph. My setup (GTP stg 2+/torqer 2) was leaning out on the dyno @ 5500+ (killed pulls at 13.5-13.8:1 AF) so I assume the DC on injectors was maxed and FP was struggling, but who knows.
01-27-2009, 05:39 PM
#5
Sorry guys, that one had Racetronix 37# injectors on it.
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02-02-2009, 08:15 PM
#8
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Jason, I have three questions for you.
1. Did you have to fly cut the pistons to run those heads?
2. what type of numbers does the MS3 put down with a set of BOX STOCK
L92 heads?
3. What was the compression ratio on this combo.
1. Did you have to fly cut the pistons to run those heads?
2. what type of numbers does the MS3 put down with a set of BOX STOCK
L92 heads?
3. What was the compression ratio on this combo.
02-03-2009, 10:35 AM
#10
At WOT it is right about 13.0:1.
LS6 intake.
No flycutting. We haven't tested the L92's with the MS3 due to no piston to valve clearance. Most people at that point go with more cubes since the majority are buying new rods and pistons and paying for machine work anyway. There are surprisingly few people out there who will flycut their own pistons. This one was right at 10.8:1 static.
It is a 112LSA.
LS6 intake.
It is a 112LSA.
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
02-03-2009, 07:41 PM
#12
Launching!
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No flycutting. We haven't tested the L92's with the MS3 due to no piston to valve clearance. Most people at that point go with more cubes since the majority are buying new rods and pistons and paying for machine work anyway. There are surprisingly few people out there who will flycut their own pistons. This one was right at 10.8:1 static.
What would be the highest compression ratio you could get me with these heads and MS3 on my LQ4? How much different would the power numbers be versus my LQ4 to this LS1?
What would be the highest compression ratio you could get me with these heads and MS3 on my LQ4? How much different would the power numbers be versus my LQ4 to this LS1?
08-29-2009, 05:06 PM
#13
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sorry to dig up an old thread, but i just started looking at these 5.3L stage 2.5 heads from texas speed... The price is just so appealing. My mods are almost identical, except i have the g5x3 instead of the ms3... what were the numbers BEFORE teh heads with those parts? Just looking to find out how much you gained from just the heads. Thanks.
08-30-2009, 08:54 PM
#14
sorry to dig up an old thread, but i just started looking at these 5.3L stage 2.5 heads from texas speed... The price is just so appealing. My mods are almost identical, except i have the g5x3 instead of the ms3... what were the numbers BEFORE teh heads with those parts? Just looking to find out how much you gained from just the heads. Thanks.
09-27-2009, 06:21 PM
#15
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Are there any Texas speed reps who could give me some advice? My tuner is telling me I can safely estimate 470rwhp if I bought AFR 205s, combined with my new FAST 92/92 with my g5x3. How much do you think I could get with the same combo with those 2.5 PRC heads?
09-27-2009, 11:32 PM
#16
TECH Senior Member
470 has been reached by LGM on that combo. Perhaps contacting them to duplicate setup would be a good thing. It is not given if you just slap it together that it will make those numbers. It has to be done a certain way with certain parts.
09-28-2009, 03:11 PM
#17
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2 years ago I did 488 rwhp / 428 rwtq on the G5X3 and PRC 2.5 5.3 heads. Had to flycut, and had the heads milled a little more. This was with a fast 90/90, u/d pulley, ewp, pace longs and ofy.
09-29-2009, 07:14 PM
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I have basically the same things. u/d pulley, LT's, ORY, Fast92/92. Also, I spoke with my tuner again, and he said the big difference other than peak numbers is the area under the curve (between the PRC 2.5 and the AFR 205 out of the box).
