obd1 to obd2

[gavinvr6 0]

hey fella's im sure this has been asked before however i done a search but couldnt find anything, so a couple of questions

1---how easy is it to change my 1993 obd1 coil pack engine to obd2?

i understand i need to change the inlet manifold throttle body ecu and engine loom but is the throttle cable operated or fly by wire.

2---is there much point in doing this as i'll be changing from the larger throttle body set up found on obd1 engines and a rado inlet mani to a smaller throttle body.

3---can my car then be re-mapped as per an ordinary obd2 vr engine and will it make similar gains

[FishWick 21]

1 - Cable. Idle control is motor controlled.

2 - I find the OBD2 engines are torquier low down and generally smoother and more responsive. On the rollers, healthy OBD2s put out the same power as OBD1 2.9s. The larger 2.9 throttle and manifold give you a slight top end advantage, but in the real world there's never any more than a car length in it between a 2.9 and 2.8.

3 - Yep

[gavinvr6 0]

is it actually worth doing the swap, my car pulls solid to the red line and and has plenty of torque was just more thinking along the re-map side as i can only 'chip' mine and dont see the point in all that hassle of soldering in a chip for only small gains. plus with a 'live map' i can have it adjusted again if engine spec changes

[FishWick 21]

If you're happy with the way it drives now, then it probably isn't worth it. Not sure what you mean by "live map" as both OBD1 and OBD2 need a new chip every time you make a change. Most AG OBD1 ECUs already have a chip holder installed at the factory, so saves a little time and money. OBD2 needs a holder soldering in and it's a nasty 44 pin chip too, so not the easiest of tasks!.

The only way to get constant retweaking ability without hardware changes is a standalone, but most people are ill informed about them being undrivable, so they get a bad press.