mclean11

I have my 86 rx7 with a recently put in 1990 engine due to the old engine going bust on me. its stock and i have found the acceleration is very slow getting 0-60 km/h but after that will accelerate fine. what could be causing it to be so slow and what can i do to give it more power?? I'm not very technically advanced and I admit i don't know a lot. I'm on here to learn and any help is greatly appreciated!
thanks,
Chris McLean

RotaryRocket88

iTrader: (7)

How was the S5 engine installed? S5 block with S4 front cover/manifolds/electronics? Or were S5 electronics and wiring adapted to the car?

DC 91 fc3s

iTrader: (11)

which maf and ecu are you using??

mclean11

You know what guys i think that is it, im pretty sure the old maf and ecu are still being used.. ill have to ask the guy who put it in for me to be for sure but if thats the problem but if so how can i go about fixing that do i just have to look for an maf and ecu for an s5?