TSP's 421ci 6.9 LQ9. Patrick G tuned 547whp 527wtq...
04-28-2013, 09:50 PM
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TSP's 421ci 6.9 LQ9. Patrick G tuned 547whp 527wtq... Thanks to TSP for the build, Patrick G and Curt for the tune and their great hospitality!!!, Randy and his guys at G&R Automotive ....and my girl, who puts up with my extreme hobby ... ;D
Quick rundown:
*421ci 6.9L LQ9
*247 cc PRC heads w/675 spring kit
*Rocker Arms are the GM L92/LS3 kit with comp cams trunion upgrade
*Texas Giant Cam -- 248/254, .615"/.622" 112LSA
*42lb injectors
*double roller timing chain
* Monster Level 5 Clutch-- w/billet wheel
*New Pacesetter headers
other stuff:
---------------------------------------------------------
547rwhp 527rwtq...all motor
The engine actually could have done more but I reached my air intake limit, so due to air restrictions it topped out at those numbers. Im gonna get my FAST 90 ported, possibly get the front ported to fit a 92mm or 102mm TB.
104mm lid, 100mm MAF, Fast Toys Ram air kit... are on the way!
In addition C6 Z06 brakes, 18" wheels, a new heavy duty tranny and rear end will all be put on the next few months... then start working on whatever needs to be done to handle some boost
[/size]
Sum dyno vid..... nothing spectacular...
Quick rundown:
*421ci 6.9L LQ9
*247 cc PRC heads w/675 spring kit
*Rocker Arms are the GM L92/LS3 kit with comp cams trunion upgrade
*Texas Giant Cam -- 248/254, .615"/.622" 112LSA
*42lb injectors
*double roller timing chain
* Monster Level 5 Clutch-- w/billet wheel
*New Pacesetter headers
other stuff:
---------------------------------------------------------
547rwhp 527rwtq...all motor
The engine actually could have done more but I reached my air intake limit, so due to air restrictions it topped out at those numbers. Im gonna get my FAST 90 ported, possibly get the front ported to fit a 92mm or 102mm TB.
104mm lid, 100mm MAF, Fast Toys Ram air kit... are on the way!
In addition C6 Z06 brakes, 18" wheels, a new heavy duty tranny and rear end will all be put on the next few months... then start working on whatever needs to be done to handle some boost
[/size]
Sum dyno vid..... nothing spectacular...
04-29-2013, 05:49 PM
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yes ...pretty much perfect drive-ability !! This is my second tune, last one was 6yrs ago. They are outstanding
04-30-2013, 04:30 PM
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04-30-2013, 05:52 PM
#9
ZetaVeinteOcho, you have a good looking curve there, and I double checked your order and you have the TSP LS1 Trunion Upgraded Rocker kit.
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05-02-2013, 10:03 PM
#13
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Thanks everyone...
Yes the heads are great for the money. I like PRC's alot, when I had my stock bottom end , full bolt on LS1...I got 470whp and 456wtq , with a much less aggressive cam and way smaller heads, same fast 90/90 set up tho... so I decided to go with them again. And this story isn't over yet! there's still more power to be made.... later on
05-02-2013, 10:48 PM
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Maybe a different cam couldve set u better numberd imo..i got told the tsp giant cam wouldnt have suited the ls3 heads but i guess that proved me wrong lol..fml ...but anyways good strong numbers man..
05-03-2013, 08:58 PM
#15
05-15-2013, 11:51 AM
#19
On The Tree
These numbers through Pacesh*tters WOW!
You are right there is a LOT of good power everywhere left in this combo just from porting your Fast, going to Kooks or ARH 1-7/8s, and running SD.
My old setup with PRC parts went from 472/471 to 505/478 just by switching to Kooks 1-7/8 and porting my Fast. (heads also got milled down .030" but let's not split hairs).
My entire torque curve improved drastically due to the Kooks, and drivability down low improved substantially.
Also your combo impresses me because the 2.12" valves on those heads are gigantic and you are only working with 4.030" of bore. Those numbers prove the shrouding of the intake valves is not as bad as with LS3 heads and their 2.165" valves.
Keep us posted, and props for acknowledging your woman in this thread. Mine wouldn't still be in the picture after 4 years if she didn't have incredible patience for car parts and garage hogging...
You are right there is a LOT of good power everywhere left in this combo just from porting your Fast, going to Kooks or ARH 1-7/8s, and running SD.
My old setup with PRC parts went from 472/471 to 505/478 just by switching to Kooks 1-7/8 and porting my Fast. (heads also got milled down .030" but let's not split hairs).
My entire torque curve improved drastically due to the Kooks, and drivability down low improved substantially.
Also your combo impresses me because the 2.12" valves on those heads are gigantic and you are only working with 4.030" of bore. Those numbers prove the shrouding of the intake valves is not as bad as with LS3 heads and their 2.165" valves.
Keep us posted, and props for acknowledging your woman in this thread. Mine wouldn't still be in the picture after 4 years if she didn't have incredible patience for car parts and garage hogging...
