Est. cost on OBD I conv. Also what the full needed part list

[wastedincome]

I know I'm not gonna get an exact cost but whatthe average rate for all the needed parts to do a OBD I conversion???

I'f a recall the parts needed were.
Head, complete intake, wireharness and ECU..

What am I missing?

[Ryan Stewart]

The biggest hassle is tapping for the second temp sensor. Other than that "complete intake" covers most of it.

[Jason89i]

The biggest hassle is tapping for the second temp sensor.

you dont need to tap head for second temp sending unit. the obd2 electronics use a dual temp sender rather than 2 single senders. its simple, just use the dual temp sender with the obd2 dual sender plug (4wire), and splice the wires from the obd1 2 single senders (2) 2wires.

ultimately it is MUCH easier to have an obd1 donor and bolt on all the electronics to the obd2 car.

as far as obd1 conversion. use everything from the obd1 car.....harness, ecu, intake, tb, maf, and all sensors (including but not limited to o2 sensor, knock sensor, crank positioning sensor).

there are some other oddities like breather hose from valve cover, dipstick and water plumbing that should also be converted to obd1. if your creative you can get the obd2 stuff to work.

cheers, jason

[Brian 89 325i]

How well would an OBDI conversion go over in Cali? How easy is it to tell that its susposed to be an OBDII engine? Other than that, it just seems really simple.

Brian

[325Projectz]

As long as the motor goes into a older car you'll be alright.

[sweetride01]

Yes, what would the estimated cost be on all the required parts, if you found most of them in good condition used (ballpark figure)? How hard is it to do yourself?

[sweetride01]

So with an S52 E30, you can use the dual-temp sensor, right???

[equate975]

you dont need to tap head for second temp sending unit. the obd2 electronics use a dual temp sender rather than 2 single senders. its simple, just use the dual temp sender with the obd2 dual sender plug (4wire), and splice the wires from the obd1 2 single senders (2) 2wires.

ultimately it is MUCH easier to have an obd1 donor and bolt on all the electronics to the obd2 car.

as far as obd1 conversion. use everything from the obd1 car.....harness, ecu, intake, tb, maf, and all sensors (including but not limited to o2 sensor, knock sensor, crank positioning sensor).

there are some other oddities like breather hose from valve cover, dipstick and water plumbing that should also be converted to obd1. if your creative you can get the obd2 stuff to work.

cheers, jason

True, but your wrong. That works unless its going in an e30 (Which since he is posting here I am assuming it it)

The dual temp sensor WILL NOT WORK with the e30. The gauge on the cluster cannot read the new temp sensor.

You have several options:

1. Retrofit an e36 water temp guage in the e30 cluster (in theroy it should work although I have not tried it, its almost impossible to track one of these guages down)

2. Tap the head and thread in the e30 guage temp sensor.

3. Tap the head and go for a VDO unit

4. Tap the thermotstat (wont be as accurate) but its less to f*&k up and a lot easier to do if you already have the motor back together. Better than not knowing the temps anyways.

[equate975]

Yes, what would the estimated cost be on all the required parts, if you found most of them in good condition used (ballpark figure)? How hard is it to do yourself?

I think I spend around $1500 to do it.

M50 intake manifold
OBDI wiring harness
All the OBDI sensors (cam, crank, knock, o2)
OBDI fuel rail (dont forget the FPR)
OBDI throttle body
OBDI ECU With a chip to disable EWS if necessary

[Mike 91 318ic]

Why can't you just leave it as obd2?

[equate975]

Because of EWS

If you leave OBDII in you will have to install the EWS system, from what I have read its going to cost as much to install that and to get it to work in an e30 as it would cost to do the OBDI conversion. the OBDI also opens up a few extra HP. I think there is one guy around here who runs OBDII but its porbably easiest just to convert.

[325Projectz]

I think he was talking about converting his OBDII 2.8 to an OBDI.