I have a 89 convertible auto its well modded but slow as **** after i put new MAF on heres my mod list

gt40 intake manifold
f303 cam
1.6 push rods
hydrulic lifters
frpp headers
o/r h pipe
flowmasters
bbk 70mm tb
75mm egr delete
76mm MAF with MAF sensor tuned for 19lbs injectors
stock intake box and tubing
2500 stall converter
B&M shift kit
3.73 gears

the car was faster with stock maf in it

 

you should run it at the track and see if it really is slow like you think it is

 

What MAF did you put in it and was it calibrated for 19lbs injectors.

 

yeah my maf is calibrated for stock injectors its made by PMAS www.massairsystems.com

 

like i said run it at the track and see how slow it really is it might just be in your head

 

Did you install it right? Airflow the right direction and straight up and down like it should be? Lets see some pics of that and you car too.

 

I would have said gears, but you have 3:73

Is it slow to launch or slow when you are moving.

 

ya i had one of those MAFs too. same brand. it made my car run rich as a ****. my afr was 11.6 from idle to wot. that could be your problem. now i have a real PRO-M not that knockoff bull but i also upgraded the whole motor so i cant compare but it doesnt run rich n e more