Dyno numbers are in. Had a big day:) with vid!!
Dyno numbers are in. Had a big day:) with vid!! Took the GXP down to Turbo Tech, and had George (owner and master tuner)
re-work my tune/tunes.
The computers have been tuned by 3 different people, so I felt it was time too have someone do the whole dam thing right, and to tune for more then just WOT.
I am now HP tuned and what a difference! Every gear pulls so.... much harder. The transmission is super responsive now with no more converter lug. George made adjustments to pretty much all areas. Used terms and such, that I have never heard of. Vey nice guy, and super professional.
Baseline pull made 332/306
Finishing pull made 349.85@6000 334.92@5000
Now.... you all know why I am using 3.69 gears lol!
The torque is nice and flat all the way across the power band.
Injectors were only 42% duty cycle, so I have plenty of room to grow.
And for those of you who wanted sound clips, here you go!
re-work my tune/tunes.
The computers have been tuned by 3 different people, so I felt it was time too have someone do the whole dam thing right, and to tune for more then just WOT.
I am now HP tuned and what a difference! Every gear pulls so.... much harder. The transmission is super responsive now with no more converter lug. George made adjustments to pretty much all areas. Used terms and such, that I have never heard of. Vey nice guy, and super professional.
Baseline pull made 332/306
Finishing pull made 349.85@6000 334.92@5000
Now.... you all know why I am using 3.69 gears lol!
The torque is nice and flat all the way across the power band.
Injectors were only 42% duty cycle, so I have plenty of room to grow.
And for those of you who wanted sound clips, here you go!
Last edited by DavidGXP; Jun 14, 2012 at 11:13 PM.
Those are some great numbers David. Now you just need to get some new track times. It be nice to see a low 12 sec N/A LS4. Was the HP falling off by 6000 rpm? I would think your set up would like to rev to 6500 rpm or so.
Congrats!!!
Congrats!!!
Custom cam (ditched DOD)
C5-R chain
Pocket ported heads
Std. Vol LS6 oil pump
LS6 intake
CAI
Headers
High flow cat
3" into dual 2.5" exhaust
TR55 plugs (.045" gap)
Built trans (robbing power lol)
275 tires
With the stock tires, and trans, my numbers might have been a little higher.
Not much higher. Adding a bigger cam would cause the power band to jump higher, and be a lot less fun to drive.
3.69 gears is the biggest we can go and cause's 3 rd gear to drop bellow 4500 rpm after 80ish mph. I could actually use less cam!
-Small port heads which flow more CFM then the 243's
-Increassing CR
-TPiS LS6 90mm intake and LS2 tb
-Removing the cat (not recommended)
C5-R chain
Pocket ported heads
Std. Vol LS6 oil pump
LS6 intake
CAI
Headers
High flow cat
3" into dual 2.5" exhaust
TR55 plugs (.045" gap)
Built trans (robbing power lol)
275 tires
With the stock tires, and trans, my numbers might have been a little higher.
Not much higher. Adding a bigger cam would cause the power band to jump higher, and be a lot less fun to drive.
3.69 gears is the biggest we can go and cause's 3 rd gear to drop bellow 4500 rpm after 80ish mph. I could actually use less cam!
-Small port heads which flow more CFM then the 243's
-Increassing CR
-TPiS LS6 90mm intake and LS2 tb
-Removing the cat (not recommended)
Last edited by DavidGXP; Jun 14, 2012 at 08:54 PM.
Not much higher. Adding a bigger cam would cause the power band to jump higher, and be a lot less fun to drive.
3.69 gears is the biggest we can go and cause's 3 rd gear to drop bellow 4500 rpm after 80ish mph. I could actually use less cam!
-Small port heads which flow more CFM then the 243's
-Increassing CR
-TPiS LS6 90mm intake and LS2 tb
-Removing the cat (not recommended)
3.69 gears is the biggest we can go and cause's 3 rd gear to drop bellow 4500 rpm after 80ish mph. I could actually use less cam!
-Small port heads which flow more CFM then the 243's
-Increassing CR
-TPiS LS6 90mm intake and LS2 tb
-Removing the cat (not recommended)
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awesome build man. question though do you think the exhaust is holding you up? for your hp level i think that doug thorley design might be to small or inefficent i knoww its FWD and the issues that makes. But **** we could have a little longer primaries IMO.
On The Tree
Joined: Dec 2010
Posts: 109
Likes: 1
Do you know how much you gained from porting the heads? Eventually I'm gonna go in the same direction as you, but I'm wondering if I NEED to get the heads ported while they're off doing all the other work.