89 hatch si
 

whats up fellas i just recently bought a 89 hatch si model and that sucker it much faster than my accord. one thing though i was driving it pretty hard and i was shifting at around 7500! without the rev limiter kicking in. i was curious to know what the stock limit is set to or if this ecu had been modded. i looked at the ecu and it is a pm6,it looks normal for the inside but it is from a 91, the date is stamped on it. im thinking maybe the prior over did something to it because it also was lowered and had the cat removed, thanks for the help!!

Re:89 hatch si
 

It should be cutting out at 6500rpm, unless the guy before you put in an 89 integra ecu. but i wouldnt drive it so hard if i were you.

Re:89 hatch si
 

the ecu box is actually dated as manufacture date 04/09/91. would the 91 integra ecu have that higher rev limit?? it just feels very strong and it keeps pulling hard at those rpms, kinda addicting you know.but i should keep below that, ill try. :'(

Re:89 hatch si
 

man, keep it belov 7 grand, i know its addicting, but youre going to get valve problems if you keep pushing the cars limits

Re:89 hatch si
 

a 91 integra ecu your car would run so rich it would smell awful. the fuel cut off for an si pm6 is 7200 rpm. you really don't want to go about 6500.

Re:89 hatch si
 

I am sure its just a pm6 ecu, I have had some odd cars over the years, with fuel cut off's not working all the time.. very odd, sometimes it would work at 7200 and sometimes it just simply would not work! I wouldnt recommend reving the a6 over 7200 without any valve train support.

Jeff

Re:89 hatch si
 

cool thanks guys ya ill chill with those higher rpms. how would i check if it was a teggy ecu and not the stock ecu. it does say pm6 on it if that helps. thanks!

Re:89 hatch si
 

ask sirex what happens when you rev too much past 7G.

he locked his head.