racerxrick

>>
It was in 3rd gear. The ramp rate was 125. I will see if I can get the raw data pulled, it is DOS and will not connect to printers… I will work on that tomorrow.
>>

racerxrick

My e mail to the shop...

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Bret,

I really only need the chart adjusted so that HP/TQ lines up per our discussion. Disregard the request for raw data.

I am suprised and disapointed that the pulls were made in fourth gear. Everyone in the greater 944 Turbo community perform their dyno pulls in 4th gear.

I regret that I was not afforded even a minimum of involvement with the whole process. If I would of had even the slightest input (as the owner and customer) the pulls would surely have been made in 4th gear!

Rick

>>

TonyG

The section of the pipe from the turbo down pipe, to the cat-back. That's the piece of pipe that pipe in question.

The problem with that piece of pipe is that its double walled. And the inner portion of the pipe, before the cat, is crushed internally. From the outside it looks like the pipe is slightly oval. But internally it's much smaller. Some a lot more than others. And it has a substantial affect on performance.

With a true "test pipe" that entire section of pipe is replaced.


TonyG

Van

Take a trip up to New York, and I'll let you dyno your car on the DynoJet heartbreaker... And I'll let you do all the work.

Personally, I think many of the 300+ RWHP cars are fantasy... When we did the dyno day in August, the only one to break 300 was a 996 GT3.

333pg333

Looks to be running pretty rich at peak torque for pump fuel doesn't it?

racerxrick

true

racerxrick

at least you perfrom your pulls in 4th (1-1) right..haha


I'll take the blame this time from lack of experience..not a virgin anymore though!

Scott H

Just a general question about AFRs, but what is considered "good?" Say around 13s below min boost, increase AFR to around mid 11s in the peak torque area, then drop to 12ish around redline?

Josh B

My two cents is that your fuel curve is way off. You need to be under 12 once you on boost or at least by 5 psi. Then under boost you really shouldn't go under 11.0 or above 12.0.

I wouldn't be suprised if you had some leaks on the intake side of the motor.

racerxrick

OK I understand the range I should be in. I assumed the LR chip has the enrichment built into it since I have no way to adjust.

And what would make you you suggest I have leaks on the intake side of the motor? Like where? All that was just off as the headgasket was replaced along with the turbo.

Thanks!

CPR

Intake side leaks will make it run rich~er

Josh B

If you have a leak in the j-boot which is before the turbo then you will be sucking in extra air that is un-metered causing the car to run leaner. If you have leaks in the piping after the turbo than you will be losing metered air which will cause the car to run rich.

My guess about leaks on the intake side is just a hunch - could be a lot of other factors causing the fuel curve to be off as well.

racerxrick

OK..thx

minho78

K26/6 12PSI MAF and Cat Bypass 215RWHP

Some 60-1 ~250RWHP at ~16PSI I guess those guys were even more upset.

minho78

[QUOTE=racerxrick;8024589]at least you perfrom your pulls in 4th (1-1) right..haha QUOTE]

I think it was third gear. Van correct me if I'm wrong. But it was nice to meet al those guys. To bad my car decided it wanted to be towed for the last 6 miles.
And when it got to Van's all was good. Learned my lesson. I got AAA now.