im buying a 94 formula that comes with lt1 edit, ill be going with a sts turbo kit. just wondering if i should install the DFI i have lying around or stick with the lt1 edit it comes with and sell the DFI.

 

Not sure about the DFI exactly, but i just picked up a set of 36# Accels and probably going to go with Tunercat. Let me know how it goes for you.

 

any input guys? one of you blower/turbo guys must have something to recomend.

 

i had both FAST and lt1-edit and i'm sure lt1-edit guru's will tell you that you can do just about anything with it that you can the dfi but when you don't have vast knowledge and limited dyno time dfi will get you where you need to be alot quicker.

 

i have a buddy who tunes with the lt1 edit a lot, infact hes the one whos been telling me to get rid of the dfi. personally which did you prefer?

 

personally i like the FAST because it's more user friendly. DFI has nice looking software also. i just didn't have the time to learn the lt1-edit. it's kinda like the old DOS vs. Windows days. you have your dedicated DOS guys but for us average joes windows was so much easier. but that said, if your buddy is going to tune for you then you probably don't need the DFI.

 

As you know the stock pcm isn't setup for anything above atmospheric pressure, so tuning for boost can be tricky. Some people are running a 2bar map sensor, and have scaled the pcm tables. I'm not sure how DFI compares.

 

good point.

 

you can use the 2 bar map on the stock pcm? are there a lot of turbo guys using the stock pcm? my buddy will be doing the tuning and he does a lot of tuning for locals so he does know his stuff. im just worried about which will be better for tuning. this car will be a daily driver. i just want to look at all the angles before i decide to sell the dfi. thanks for your suggestions.

 

I stayed with the Lt1 editor through thick and thin because of part throttle drivability issues.

Their is a car around here with a FAST system on it and he does have those very same part throttle drivability issues ... WOT their is no problem.

That said, the Lt1 editor does seem to be near its practicle limits with my current set up ... see sig. I have to give it 1/4 throttle on cold start up or else it floods, there must be a cold start table in there somewhere that Lt1 editor can not address and the situation is aggravated by the 42# injectors. That aside WOT power and fuel are spot on and part throttle drivability is near stock. It took around an hour and 4 trys to get it to work, about an hour on the dyno. Not bad.

Hope this helps

LWM

 

perhaps the lt1 edit will be good enought then.

 

I got tired of the MAF limit and went to FAST, and I don't have any part throttle driveabilty problems... it was easy to tune, and runs nicely.

Christian Millard on the F-body.org blown list has done an aftermarket MAF with freq-voltage translator and scaled all the relevant tables (like the Ford guys do)... that's the only other route I'd recommend for decent power but the electroncis were beyond my level.

Then again, lots of guys stick with loading extra fuel in the PE tables and get by. I just really like the wideband.