I have recently finished installing the Greddy turbo kit and the car seems to go lean when i floor it. I am using a canscan to log everything. Since the greddy kit is locked not sure where to start looking. Please help. It seems to sputter and not have the power it should after 5000 rpm. TIA

 

What are the a/f ratios up there when you look at canscan? Did you raise the boost at all? Get a datalog and print it out. Then post it here.

 

i have the 2 log files here they are they are comma delimited

 

Well, post them!

(RG - I never noticed your sarcophagus was looking at me before. Creepy.)

 

Well, in the first run at 4200 RPM or so, the throttle is being pulled. Are you doing that or is the car doing it on its own? That A/F looked good, but then the power is being turned off.

How and where are you doing this run?

 

i just did these two runs about 15 minutes ago. It is about 50F outside and i live in Tampa Bay area of Florida

 

back road by the garage where i am working on it. I am trying to keep it at about 15mph in second then getting on the throttle.

 

It looks like a TCS/DSC pull, but I presume you have that turned off.

 

there are 2 vacuum feeds on the intake without hoses and they never had any. they are located on the side on the intake right next to each other. I have just ordered a shop manual for the rx8 but wondering if they are supposed to be capped or go somewhere?

 

maybe he has gremlins living in his engine...i hate those guys

 

i have them turned on should i turn that off?

 

ok so it looks like it goes rich is that too rich or is that right?

 

Hmm, let's see. Philodox reports being able to spin the rear wheels in 1st through 4th gears when he goes WOT. Admittedly this is with winter tires. Loube mentions he's running with DSC on. What do you suppose happens if the rear wheels spin with DSC on?
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BMW 326

 

drive-by-wire sucks.

 

we are going to dyno it now any special instructions to do so?

 

Ok so my mechanic has answered some of my concerns the car is running rich not lean. And the hesitation i feel is a tuneability issue. It seems to be at part throttle right around 4-5k. But now sure how i can tune that if the emanage is locked.

 

i thought i had a post in here... any way did it throw a too lean cel?

 

the system comes tuned

 

yes it was

 

the tune issue i talk about is like a sputter or hesitation at part throttle

 

did you insatall it yourself

 

install

 

Loube... you are not listening to what these guys are saying. You need to turn off TCS/DSC when doing these tests, and when on the dyno. Such a large TPS drop and ignition drop indicates they are likely the culprit.

Also, if you have any open fittings on the intake (you said there were two) the manifold will never fully pressurize, no matter how much boost you run. You definitely want to track down any leaks before you start spending coin on dyno time.

Tim

 

the tune issue i talk about is like a sputter or hesitation at part throttle

 

well, as stated by others, your car is running rich like it should. to be honest, greddy did a good job keeping the afr pretty flat around at 12. You've got some wierd numbers in their around 1800 that are prolly just a bad reading.

Be sure to turn the DCS off when your driving. Do you have a BOV? You might want that to help with your problem. In addition, I would take it easy on the car for a week before hitting the dyno. Give everything a chance to break in.