is there a difference in any of the usdm gsr blocks from 94-01 if so what is it.


and how is the usdm and jdm gsr blocks different besides pistons

 

96+ GSR blocks have the crank angle fluctuation sensor on them.

Other than that, I think they're the same.

 

what does the crank angle fluxuation sensor do and does it really matter if i have it or not

 

Yes it matters, but every motor is going to have one, 94-95 it is in the Dist, and 96+ it is in the block.

 

if i'm using a 96 gsr block with a 95 gsr distributor, what needs to be done to make sure everything is in flow

 

What harness will you be using, OBD I or II, well no matter I will cover both scenerios:

Ok as I said OBD I cars had the crank angle sensor in the dist, and is part of the wiring in the Dist plugs
OBDII Motors have it in the crank, there is a little sensor that bolts to the Drivers sid of the crank behind the crank pulley and that is where the plug is so:

OBD I Harness: The computer will just read Crank Angle from the Dist because the harness will not have the plug that will match up at the crank since this was not part of the OBD I harness or motor

OBD II Harness: The computer will read Crank Angle from the Crank because this harness will have the proper plug to match the one at the crank and will not worry about the Crank Angle Sensor in the Dist, it won't even know it's there since this is not part of the OBD II wiring.

 

using obd1 harness. thanks for the info. now, just for kicks, what if i was using a 96 distributor? dont the harness plugs on 96-98 tegs plug straight up to 94-95?

 

No the 96+ Integs have one Dist plug verse the two plug Dist on a 94-95, but if you have an all OBD II motor including Dist then you can use the Integra OBD II harness because unlike the Civic the Integras did not change the plugs that plug the motor harness to the main harness, the 96+ Integra motor harness will plug into a 94-95 main harness just not to a 94-95 motor, did I make sense there at all?

 

I thought that the OBD-II CKF was there to sense minute changes in the crank speed to sense misfires. I've been told that it has nothing to do with crankposition since it simply uses a hall effect sensor.

 

so can i use the obd1 harness on the 96 block? if i can, do i just need the distrib/injectors?

 

Yes you just need the OBD I Dist and ECU