Hondata

nitroice40 wrote:I have a 91 pr4 integra, would a p74 or a p75 ecu work in my car. I have clear plugs on my dis.

Whats the diff between the 74 and the 75

thanks

P74 is an OBDI Integra LS (94-95)
P75 is an OBDI Integra GS (94-95)

you have done this? If so, does it pass emissions? are there any problems, or wiring modifications?

Like I said, I ran a stock P75 (Integra GS) ECU on my B21A1 without any problems or rewiring. Hondata should do the same as it goes off of stock wiring and sensors.

I have no clue on emissions, I ...

ahnold wrote:so what's the verdict on this? I also have a 1990 prelude si and am interested in hondata.

You can run Hondata chipped P74/P75 Integra LS ECU in B21A1 Preludes.

There is some misunderstanding in the Honda tuner world on OBD0/OBD1 years of production.

In 90-91 fuel injected Honda Preludes were produced with B20A/B21A motors that were predecessors to the current popular B-series and H-series. As I understand Hondata system will run on a 4-cylinder Honda with ...

U will need to get an OBD0 Prelude ECU (PK2) That is the only one that will properly work with your size motor. Check otu www.car-part.com for good pricing on used ECUs.