Whipple 2.3 @ 17psi goes 11.08 @ 127.00mph

[Avenger]

Thought I would share and see what everyone thinks. First time at the track this year. Had trouble with the launch, couldn't manage anything better than a 1.67 60ft... Car is running 17psi, tuned for 94 octane and sees 20deg of timing with 11.7 AFR. For some reason, it ran in the 12.2-12.3 range on one run and trapped 130.2mph, which is 3mph faster than my otherwise best that day ! :dw: Is it really making that much more power with a leaner mixture ?

What's everyone running with their 2.3 Whipple at 17spi on pump gas ?

Should I just move on to the 3.0" / 21psi pulley or extract the most out of this setup ? Big difference between both ?

Thanks for your input ! :beer:

Edit: Friend just sent me a link of my best run of that day

[ame="http://www.youtube.com/watch?v=LoyhjmiYmXE"]YouTube - 2003 Cobra runs 11.08 @ 127.00mph at Pont-Rouge[/ame]

Alex

 

[younggun04]

LOL our numbers are almost identical. I am running a 3.00 pulley and only seeing 16.50 PSI :shrug: but only 18* of timing. My best time is 11.33 @ 130 with a 1.76 60ft (on 18" nittos DR's).

Congrats on the time. 10's are a better 60' away! :beer:

 

[Avenger]

Well, I don't have any dyno numbers as the car is tuned on the track. The 570 / 540 is estimated. I also have a 4# lower which explains why I'm seeing 17psi with the 3.5" upper. Are you running 18* on 93 octane ?

 

[c_mart_28]

What are you running for tires?

I'm also running 16-17 psi on a 2.3 whipple. I've run a best of an 11.40@122 on 325/50/15 et streets w/ a 1.69 sixty. First time ever in the car on the track so seat time would help my time. Car has run a best of 10.78@128 on actual slicks. My car made right under 580 on a dynojet 17* of timing for 92 octane. Maintains low 11's afr through the rev range.

Your trap indicates higher-10's should not be a problem.

 

[Avenger]

Running 26 x 11.5 x 16 ET Streets. Was dropping the clutch at 5500RPM and the car would almost die so there's a lot more traction left in 'em ! Installing the 2 step and launching at full boost my next time at the track. We'll see if the engine can over power the tires :rolling:

 

[BlckBox04]

keep at it you'll be in the 10's before u know it. FWIW i was running 15-16psi on my kb ~550 hp &530 tq and went 10.96@126 on slicks.

 

[o3SnakeBite]

I dont have a cobra but my KB GT is running 17psi and it has trapped 127 with the previous owner

 

[SVTkel]

Thought I would share and see what everyone thinks. First time at the track this year. Had trouble with the launch, couldn't manage anything better than a 1.67 60ft... Car is running 17psi, tuned for 94 octane and sees 20deg of timing with 11.7 AFR. For some reason, it ran in the 12.2-12.3 range on one run and trapped 130.2mph, which is 3mph faster than my otherwise best that day ! :dw: Is it really making that much more power with a leaner mixture ?

What's everyone running with their 2.3 Whipple at 17spi on pump gas ?

Should I just move on to the 3.0" / 21psi pulley or extract the most out of this setup ? Big difference between both ?

Thanks for your input ! :beer:

Alex

Thats a good time / mph - congrats. Also 1.67 isn't too bad at all.

 

[younggun04]

Well, I don't have any dyno numbers as the car is tuned on the track. The 570 / 540 is estimated. I also have a 4# lower which explains why I'm seeing 17psi with the 3.5" upper. Are you running 18* on 93 octane ?

Oh LOL that explains a lot... I missed the 4# lower. :beer:

We don't get 93 here in my part of Alberta, I run Mohawk 94 and A/F is around 11.3.

Pretty good guess on numbers!

 

[JaCobra]

just wondering but was was your 1/8 mile et and mph?

 

[Avenger]

1/8 mile was 7.18 @ 100.4mph

 

[Dismember]

Nice time Alex! Terminators rules Pont-Rouge dragway! hehe ... BTW if you want to improve your 60 i can rent you youre EX-Hoosier for a day!

I may return to the track on wednesday.

Ben

 

[Avenger]

Ahahaha, trust me, the ET Streets hook better than the QTP, which is expected considering they're 2" wider. The additional traction gave me some trouble on the launch as I have an aluminium flywheel and a heavy car so I might have to raise my launch RPM or increase my tire pressure. Will definitely try it out next time out !

 

[kb02gt]

nice run bro . u still have the stock irs ?

 

[Avenger]

Thanks, bet it will easily go 10s once I figure out the launch. IRS upgrades include BilletFlow brace, urethane subframe bushings and aluminium diff bushing kit. Still running stock half-shafts :beer:

 

[PWORLDSTANG]

Nice times! Your car definitely has 10's in it as it sits!

 

[kb02gt]

what rpm are u shifting at ? what gears do have ?

 

[Avenger]

Still running the stock 3.55, shifting at 6500-6600

 

[kb02gt]

wasnt too sure when to shift the cobra as far as the powerband goes .. i was so used to shifting my 02 supercharged GT @ 5800..ive been shifting at 6000 in the cobra

 

[SVT03Chris]

That's pretty damn good for 17#s bro! Congrats!! Super close to 10s no doubt!