LS3 C6 makes 527 rwhp!
07-18-2012, 10:07 AM
#23
Instructor
Thread Starter
Unfortunately no. I was pressed for time due to an issue with a part that was twice sent to me incorrectly. It set me back 2 weeks from when my tuner at the dyno shop was supposed to get me in. He kept an open slot in his schedule for 2 weeks so I could get the car in after I did the swap. Mods before the cam were full exhaust, diablosport tune, modded CAI. The car pulls like an absolute monster @ 4k and up, but still is docile enough to daily drive with shifts ~ 2000 rpm. The car does however jerk and surge when cruising below ~1500 rpm, but can easily be shifted around. Not to mention I can still get on avg 30 mpg at 70 mph on the highway! I love this car 
07-18-2012, 09:34 PM
#24
whoa this monster is right up the road from me in tampa? nice beast you got their
Any track plans for it?
12-07-2012, 12:34 PM
#25
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12-07-2012, 01:36 PM
#27
Burning Brakes
Those are some nice numbers but do seem a little high since i thought this cam was supposed to be around 470-500 Area Cam only.
My personal C6 like 12.2-12.4 AFR put down the best numbers and track mph with that AFR
Using a NGK AFX with NTK sensor.
My personal C6 like 12.2-12.4 AFR put down the best numbers and track mph with that AFR
Using a NGK AFX with NTK sensor.
12-07-2012, 01:40 PM
#28
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St. Jude Donor '11-'12-'13-'14
Same for me Shane. My car picks up 0 ET or MPH at the drag strip from 12.2-12.8. I run it at low 12s and love it.
12-10-2012, 12:39 PM
#30
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I might be a wee bit skeptical of 527 cam only on a Dynojet. On a Mustang, I certainly am. But, not trying to start a pissing contest. If the car runs times to support it, then congratulations on such a cam-only animal.
Edit**
Just saw it went 12.2 at 123. Yyyyeah. Street tires or not, your trap speed is more in line with a car making about 100rwhp less. I went 12.2 at 122 on street tires back at 426rwhp/389rwtq. 2.2 second 60' and an M6.
Edit**
Just saw it went 12.2 at 123. Yyyyeah. Street tires or not, your trap speed is more in line with a car making about 100rwhp less. I went 12.2 at 122 on street tires back at 426rwhp/389rwtq. 2.2 second 60' and an M6.
Last edited by SlickShoes; 12-10-2012 at 12:44 PM.
12-10-2012, 03:56 PM
#32
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It is a cam-only car.
There is porting, and then there's polishing. Different approaches. In paid-tuner speak, that means "we hit the runner with some sand paper and and what we gained in a couple CFM, we lost in atomization".
Whatever actually was done to the heads, I doubt it was anything resembling porting based on the OP's description. Regardless, when other LS3 anomalies are barely cracking 501, 503 cam-only out on the East Coast, and on Dynojets, a random 25rwhp more or so isn't going to be found (on a dynamometer that is a unilaterally accepted prude) with some 600 grit.
Bottom line is 12.2 @ 123.
He noticed right away that the runner didn't need much work, if any. The rough casting would be smoothed, but no excess material required removal.
Whatever actually was done to the heads, I doubt it was anything resembling porting based on the OP's description. Regardless, when other LS3 anomalies are barely cracking 501, 503 cam-only out on the East Coast, and on Dynojets, a random 25rwhp more or so isn't going to be found (on a dynamometer that is a unilaterally accepted prude) with some 600 grit.
Bottom line is 12.2 @ 123.
12-11-2012, 01:01 AM
#33
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C6 of Year Finalist (performance mods) 2019
It is a cam-only car.
There is porting, and then there's polishing. Different approaches. In paid-tuner speak, that means "we hit the runner with some sand paper and and what we gained in a couple CFM, we lost in atomization".
Whatever actually was done to the heads, I doubt it was anything resembling porting based on the OP's description. Regardless, when other LS3 anomalies are barely cracking 501, 503 cam-only out on the East Coast, and on Dynojets, a random 25rwhp more or so isn't going to be found (on a dynamometer that is a unilaterally accepted prude) with some 600 grit.
Bottom line is 12.2 @ 123.
There is porting, and then there's polishing. Different approaches. In paid-tuner speak, that means "we hit the runner with some sand paper and and what we gained in a couple CFM, we lost in atomization".
Whatever actually was done to the heads, I doubt it was anything resembling porting based on the OP's description. Regardless, when other LS3 anomalies are barely cracking 501, 503 cam-only out on the East Coast, and on Dynojets, a random 25rwhp more or so isn't going to be found (on a dynamometer that is a unilaterally accepted prude) with some 600 grit.
Bottom line is 12.2 @ 123.
At a strong 100 hp less, I've run 123 on a bad pass and 124-125 is normal.
He's hoping for low 11's, but if he can't get mid to high 10's with DRs then the dyno numbers become questionable. I wouldn't make judgement until he's had the opportunity to get back to the track.
12-11-2012, 02:30 AM
#34
Team Owner
It's easy to chalk up the 12.2 to poor traction, but I agree the 123 is real low assuming he pushed it after the launch. I certainly wouldn't bother mentioning a run that I had problems on both ends.
At a strong 100 hp less, I've run 123 on a bad pass and 124-125 is normal.
He's hoping for low 11's, but if he can't get mid to high 10's with DRs then the dyno numbers become questionable. I wouldn't make judgement until he's had the opportunity to get back to the track.
At a strong 100 hp less, I've run 123 on a bad pass and 124-125 is normal.
He's hoping for low 11's, but if he can't get mid to high 10's with DRs then the dyno numbers become questionable. I wouldn't make judgement until he's had the opportunity to get back to the track.
12-11-2012, 09:52 PM
#35
Instructor
Thread Starter
Im not sure what the DA was that day - temps were in the high 80s and there was a headwind.
I posted on LStech as well, I looked at the wrong timeslip, though marginal - quickest run was 12.1 at 121. Highest mph I hit was 123. I've run at this track for years with multiple cars. My runs are always slower comparative, even with other drivers, its just the location/track prep. Track is 750ft ASL, thats all I know.
Id like to head back there in the summer, armed with DRs. We will see though.
Also, as mentioned above about the heads being 'polished' or 'ported'. We used a mild sanding bit on all the runners, and focussed moreso on the exhaust runners which needed more work. Both heads took only a few hours
I posted on LStech as well, I looked at the wrong timeslip, though marginal - quickest run was 12.1 at 121. Highest mph I hit was 123. I've run at this track for years with multiple cars. My runs are always slower comparative, even with other drivers, its just the location/track prep. Track is 750ft ASL, thats all I know.
Id like to head back there in the summer, armed with DRs. We will see though.
Also, as mentioned above about the heads being 'polished' or 'ported'. We used a mild sanding bit on all the runners, and focussed moreso on the exhaust runners which needed more work. Both heads took only a few hours
Last edited by hangtime204; 12-11-2012 at 09:58 PM.
12-12-2012, 07:00 AM
#37
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St. Jude Donor '11-'12-'13-'14
FWIW, the best I ever got in my car on street tires was 12.9@119 compared to 10.6@129 on the exact same setup with my dragpack. I have 0 traction with my street tires, especially on the dragstrip, so I had to peddle it the whole 1320' just to stay out of the wall. At no point during my run could I even go full throttle as the *** end would want to come around on me.
I don't believe your 12.1 timeslip is doing the car any justice and I would honestly expect you to pick up another 5-7mph when you have some DRs.
I don't believe your 12.1 timeslip is doing the car any justice and I would honestly expect you to pick up another 5-7mph when you have some DRs.
12-13-2012, 01:53 PM
#38
Former Vendor
not rich if the motor is knock limited due to compression/fuel quality... you'll never see me tuning any ls3/ls7 at 12.8 AF on pump gas...
12-13-2012, 02:03 PM
#39
Former Vendor
Kind regards,
Jordan Priestley
888.308.6007
Last edited by JDP Motorsports; 12-13-2012 at 02:07 PM.
12-13-2012, 02:11 PM
#40
Former Vendor
Those are generally post converter AFR readings and 12.4 to 12.6 pre converter... With the ethanol in fuel now I generally shoot for 12.4. We see a .2 AFR delta through high flow converters so 12.4 to 12.6 is 12.6 to 12.8 post converter... 12.1 is rich for an NA application but there are a lot of factors that determine what you end up with. We tune some of the road race cars to 12.2 up top as they're being run for extended periods of time at high RPM...
Kind regards,
Jordan Priestley
888.308.6007
Kind regards,
Jordan Priestley
888.308.6007
Last edited by Cunningham Motorsports; 12-13-2012 at 02:14 PM.