I had a obd0 pr3 mugen chipped ecu and it grabbed really hard, especially revving past 7K and shifting, the car would jerk forward hard after every shift and the wheels would spin. Id get whiplash if i didnt have a headrest. The only bad thing was vtec was 4400.

I just converted to obd1 p28 and it doesnt have as much power and aggressiveness at the top end. Shifting in the higher rpms doesnt have the same bite. Will tuning fix this? I did gain a tiny bit of midrange with the p28. Im planning to go hondata soon.

EF hatch
jdm b16a
dc 4-1
apex ws2
2.5 cai
skunk2 stge2
skunk2 valve springs
skunk2 cam gears
aem fuel rail
b&m fpr

 

bump

 

If the p28 your running is not chipped for your vehicle's setup, you obviously will lose power. Get the obd1 ecu chipped & be happy :-)

 

the mugen chip runs pig rich and its not good to run thoses (onesize fits all) chips because every motor is different. have your car tune.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber &raquo;</TD></TR><TR><TD CLASS="quote">If the p28 your running is not chipped for your vehicle's setup, you obviously will lose power. Get the obd1 ecu chipped & be happy :-)</TD></TR></TABLE>

yes its chipped

 

Tuning &gt; universal chip

 

Yeah, tuning your motor would serve you 100 times better than running the Fake *** Mugen one you have. You'll get longer engine life, increased power, and will save thousands in gas; if it keeps going up the way it is, over the duration of a few years.

 

Tuned ECUs for a while...

The P28 may not be tuned to your motor's liking....I assume it may be leaner that what the motor likes since you say it runs better on the mugen ecu which does run pig rich.

Also, make sure your FPR and distributor timing is set to stock settings.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rtzcom &raquo;</TD></TR><TR><TD CLASS="quote">Tuned ECUs for a while...

The P28 may not be tuned to your motor's liking....I assume it may be leaner that what the motor likes since you say it runs better on the mugen ecu which does run pig rich.

Also, make sure your FPR and distributor timing is set to stock settings.</TD></TR></TABLE>

well the mugen didnt run well until i hit 5K and thats where the power came in. When i would hit vtec at 4400 i would lose power. I guess the p28 has better low end. Hope to get it tuned asap.

 

Ditch the chip totally and have the ECU street or dyno tuned for your setup using a proper base map or program.