Spartan 402ci GTO goes 530/495 with stock driving manners
04-14-2012, 02:55 PM
#1
Spartan 402ci GTO goes 530/495 with stock driving manners This build was a very mild build with cross-country traveling ability in mind, stock driving manners and a BIG fat torque curve. I believe we achieved those goals and then some. The car idles butter smooth @ 800 rpms and runs just fine in 6th gear @ 1000rpms/40mph.
FWIW, ZERO tuning was done on the dyno. These numbers are "off the street". Pulls were also made through full exhaust.
Videos will be up soon.
Brief break down of engine details:
-LS2 block, 402c.i., -2cc pistons
-TFS 235 Cyl heads massaged over with an Advanced Induction valve job clean up, milled to our specifications (64cc)
-Manley Nextek Springs with titanium hardware
-Custom length pushrods, 3/8 diameter - Yella Terras shimmed .020 for good wipe
-Spartan custom cut camshaft (Cam Motion) - 236/242 .630/.620 115LSA
-C5R Timing Chain - Melling HV oil pump
-Lunati Link bar lifter kit
-FAST 102 / NW TB
-All other usual bolt ons: Kooks LT's, 2.5 mids with Magnaflow mufflers, Svede intake
-3.73 gears w/ Tru-trac
I could have played with the car on the dyno some and made over 500TQ, but this is a legit "off the street" number and I decided against it since I like to build fast street cars rather than fast dyno racers.
Enjoy - www.SpartanLSXPerformance.com
FWIW, ZERO tuning was done on the dyno. These numbers are "off the street". Pulls were also made through full exhaust.
Videos will be up soon.
Brief break down of engine details:
-LS2 block, 402c.i., -2cc pistons
-TFS 235 Cyl heads massaged over with an Advanced Induction valve job clean up, milled to our specifications (64cc)
-Manley Nextek Springs with titanium hardware
-Custom length pushrods, 3/8 diameter - Yella Terras shimmed .020 for good wipe
-Spartan custom cut camshaft (Cam Motion) - 236/242 .630/.620 115LSA
-C5R Timing Chain - Melling HV oil pump
-Lunati Link bar lifter kit
-FAST 102 / NW TB
-All other usual bolt ons: Kooks LT's, 2.5 mids with Magnaflow mufflers, Svede intake
-3.73 gears w/ Tru-trac
I could have played with the car on the dyno some and made over 500TQ, but this is a legit "off the street" number and I decided against it since I like to build fast street cars rather than fast dyno racers.
Enjoy - www.SpartanLSXPerformance.com
Last edited by Damian; 03-24-2013 at 02:13 AM.
04-15-2012, 02:11 PM
#4
Sorry I forgot to mention, this is in a 2005 GTO. I'd wager to say we'd be in the 550rwhp range if it were an F-body/10 bolt setup. The GTO drivetrain eats up HP on the dyno especially after gears are installed.
We're very happy in how it turned out. It's crazy that such a docile car can be smooth as a kitten one second, and blow the tires off @ 60mph in a simple 2nd gear down shift.
We're very happy in how it turned out. It's crazy that such a docile car can be smooth as a kitten one second, and blow the tires off @ 60mph in a simple 2nd gear down shift.
04-15-2012, 09:57 PM
#7
Launching!
Join Date: May 2009
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Nice numbers out of a goat! I'm hoping to make 540rwhp out of mine whenever I build a 408. Pretty much same setup as what I wanna do except I'll have stock gears and bigger cam.
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04-16-2012, 04:17 PM
#9
Great combo Josh. Looking strong brother. Well done.
__________________
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.
