Well, found a good deal on a MAF for my 89 C4. Getting a lttle nervous about installing it. The motor is a 3.8L rebuild with 993 sport cams and towers(nice hydraulic lifters) I figure that a MAF will really pay off on this situation. Question I have is, will the regular kit and chip compensate for the 3.8L? 2nd question is how hard is it to pry the circuit boards apart to fit in the new chip, looks like pretty delicate work. The car runs great right now and the G-tech is showing 245hp at the wheels. Should I just be happy with this and re-sell the MAF or go for it??
Thanks,
Drew <img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />
89 C4
86 930

 

You should get a custom chip burned for it(or Unichip). When I was shopping my 993 3.8 there were no off the shelf chips available over here.

Steve Weiner does have 993RS OBD2 chips but that won't work on the 964 brain(he may also have off the shelf 964 chips as well?). Asssuming its an Autothority MAF they may have an off the shelf chip, but I wasn't using their stuff so never followed up.

Get some 1 3/4" headers installed before doing a custom chip.

 

First off you need to have your car dyno tuned which ever intake you run on your modified motor.

I run a FVD Mass Flow System on my RSA with a custom dyno tuned chip. I know that compared to stock 964 intake vs. 964 w/ mass flow both cars had Cat By-Pass Pipe, only one stock muffler w/ open air box and custom dyno tuned chip by Cyntex. The mass flow system gain was 2% hp & 7% torque (237 hp & 223 ft-lbs), but the torque was much broader. What's really nice is all the torque and how early you're getting it. The mass flow system is breaking 200 ft-lbs at 3800 rpm and still gaining until 4500 rpm. The stock intake is just breaking 200 ft-lbs at 4500 rpm and topping out with only 209 ft-lbs at 5500 rpm max vs. the mass flow system 223 ft-lbs at 5250 rpm max.

My 3.6 motor has since been rebuild and massage and now pulls 252 hp and 231 ft-lbs at 5000 rpm. I think that the mass flow is just one more incremental improvement that when combined with other mods all adds up to more power.