Gained 32 rwhp with PRC 2.5/5.3L
08-10-2005, 01:16 PM
#1
TECH Senior Member
Thread Starter
Gained 32 rwhp with PRC 2.5/5.3L https://ls1tech.com/forums/generation-iii-internal-engine/359088-got-my-prc-s-5-3-2-5-overall-impression.html
Set up:
~ 11.15> 11.20 SCR
Stock LS1 shortblock
224/220, .581/.581 116+0 lsa
PRC 2.5/5.3L, 2.04 int/1.585 exht, PRC platinum springs, 60.5cc (.010 mill)
Graphite gasket .054
MAC mids (primary grind mod, flange mod)
MAC ORY
Hooker catback
FIPK
stock MAF
Ported stock TB
Racetronic PnP 255 (w/harness)
Racetronic FPR (62 psi at rail)
SVO 30lbs injectors
LS2 Timing chain
Stock oil pump
Tune by Allen Nelson from NELSON PERFORMANCE (98 octane tune)
Vig 3200 stall
FLP Level IV A4
Stock 10 bolt, 3.73 gears, T/A girdle
plus a buch of suspention mods
To cut it short:
436 rwhp live on street test (high heat/humidity) with my G-Tech Pro.
That is 32 rwhp extra from 1 to 1 head swap
Previous heads (241 casting, slightly shaved, Cometic .045, LS6 valves, 918's, titanium retainers)
~ 10.5:1 SCR
404 rwhp/383 rwtrq (Dyno)
G-Tech Pro is within 1% of live measurement Vs Dyno on same day BTW.
Set up:
~ 11.15> 11.20 SCR
Stock LS1 shortblock
224/220, .581/.581 116+0 lsa
PRC 2.5/5.3L, 2.04 int/1.585 exht, PRC platinum springs, 60.5cc (.010 mill)
Graphite gasket .054
MAC mids (primary grind mod, flange mod)
MAC ORY
Hooker catback
FIPK
stock MAF
Ported stock TB
Racetronic PnP 255 (w/harness)
Racetronic FPR (62 psi at rail)
SVO 30lbs injectors
LS2 Timing chain
Stock oil pump
Tune by Allen Nelson from NELSON PERFORMANCE (98 octane tune)
Vig 3200 stall
FLP Level IV A4
Stock 10 bolt, 3.73 gears, T/A girdle
plus a buch of suspention mods
To cut it short:
436 rwhp live on street test (high heat/humidity) with my G-Tech Pro.
That is 32 rwhp extra from 1 to 1 head swap
Previous heads (241 casting, slightly shaved, Cometic .045, LS6 valves, 918's, titanium retainers)
~ 10.5:1 SCR
404 rwhp/383 rwtrq (Dyno)
G-Tech Pro is within 1% of live measurement Vs Dyno on same day BTW.
08-10-2005, 01:35 PM
#3
Kickass! Nice writeup too.
__________________
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.
08-10-2005, 01:51 PM
#5
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i agree with fast on the exhaust, i just recently switch from the mac ORY to duals and it was a huge improvement. Good writeup also, i was thinkin about usin the same heads and u just helped me make up my mind...thanks!
08-10-2005, 02:03 PM
#6
TECH Senior Member
Thread Starter
Originally Posted by 1fastWS6
Not bad. I think your exhaust setup is holding you back 10-15rwhp minimum.
As for the MACs, I think a nice set of QTP's with HVC's will give me that extra 10rwhp, but $1250 + for that is not worth it IMO. (At least to me it isn't)
At the track, I'm in a street division (S/O), 11.499 max. I'm already way faster than that on nitrous, I added the heads to be able to run N/A, less guesswork and more consistancy. (N2O is there if I need it).
Plus, I'm going to loose a bit more I think, because I'm adding cats (Carsound)and a Magnaflow muffler (custom tubing), because I want to bring it back on the street. (The Vette is nice, but no power match, I kinda miss my street challenges)
My original plans was to go (S/S) division, Super Street and be track only, but it will have to wait till next year.
Trending Topics
09-09-2005, 12:05 PM
#9
Do you have any dynos in your area? The latest set I heard from picked up 41rwhp. I'm wondering how accurate a Gtech is!?!?!?
__________________
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
09-09-2005, 12:57 PM
#10
TECH Senior Member
Thread Starter
Yeah, there is a couple, but I have to wait for cooler weather, it is still over 110*F here.
From last years experience, the G-Tech pro was ~1% on the low side vs dyno reading on same day (within 40 miles of the live test, 2 hours apart)
So it is pretty accurate.
I had dynoed 404 and registered 399 on the G-tech pro
From last years experience, the G-Tech pro was ~1% on the low side vs dyno reading on same day (within 40 miles of the live test, 2 hours apart)
So it is pretty accurate.
I had dynoed 404 and registered 399 on the G-tech pro
09-09-2005, 02:17 PM
#12
TECH Resident
Originally Posted by PREDATOR-Z
Yeah, there is a couple, but I have to wait for cooler weather, it is still over 110*F here.
From last years experience, the G-Tech pro was ~1% on the low side vs dyno reading on same day (within 40 miles of the live test, 2 hours apart)
So it is pretty accurate.
I had dynoed 404 and registered 399 on the G-tech pro
From last years experience, the G-Tech pro was ~1% on the low side vs dyno reading on same day (within 40 miles of the live test, 2 hours apart)
So it is pretty accurate.
I had dynoed 404 and registered 399 on the G-tech pro
What weight did you put into the G-tech pro? I have one of these, I put in 3700lbs, its a 2000 Trans-Am with t-tops, no weight reductions, tools in the boot, full tank of gas. Also what degree pitch did you do, mine is still 2% as it was the default setting, my g-tech pro reads about 240rwhp, only pulls about .5g's max. Seems a little low. :O(
09-10-2005, 12:36 AM
#15
TECH Senior Member
Thread Starter
Originally Posted by JS
Whats quench with a 60CC,.54 gasket and a .010 mill.....
in my case it is
.054 - .007 = .047
