i have a b18b ls ecu obd2 and i am buying the obd2 to obd1 conversion harness and i also have everything i need to chip but what ecu should i go with? thanks- will

 

i don't know what setup you have in your car, motor etc...so, if you have a gsr manifod in the car with secondaries you need a p72 to control them, if not, a p28 is fine and is what most use.

-Mike

 

hey man do you need an obd1 ecu??? for an ls? i need an obd2 ecu for my ls i am willing to trade if you need one pm me and we can work out a deal mine for yours with a little money or something!

 

You can use a OBDI PR4 or OBDI P75 ECU.

 

PR4 won't give same performance on a B18b (it's made for a B18a). Get an obd1 ecu cus u probably won't find too many people in the states that can chip an obd2 ecu, and on top of that, you probably don't need it chipped since your asking this question.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dohcnotec &raquo;</TD></TR><TR><TD CLASS="quote">PR4 won't give same performance on a B18b (it's made for a B18a). Get an obd1 ecu cus u probably won't find too many people in the states that can chip an obd2 ecu, and on top of that, you probably don't need it chipped since your asking this question.</TD></TR></TABLE>

In stock form, the P75 will probably perform better than the PR4 on a B18B but once chipped they will performance extactly the same. Since, both the OBDI PR4(92-93) and OBDI (94-95) have extactly the same circuitry but have different programs.

 

you dont' need a p72 to run IAB's on a gsr manifold.. a p28 can be modified to do so... but he has an LS anyways it appears

 

What modification do you need to do to the P28 to control the IABs ?