da-9

will be a decent power increase compared to the stock single.. good luck with the swap

danronian

Thank you for the super-relevant info...and whadya know, post 50. :1

ekhatch

lol i know huh. okay, another quick question. i found a local guy that has a swap for sale. he had a b18a (obd1 ls) block, with a b18b (obd2 ls) head. he's cutting me a decent deal, so im thinking about jumping on it. my question is, is it okay to have a obd2 head on an obd1 block? will it make the swap anymore difficult? thanks again for the good info guys, much appreciated

danronian

Nope, it won't make even the slightest difference. If you have the breather box on the back of the block, you'll probably have to plug it if you have an obd2 valve cover. Other than that, not a problem, and that problem really isn't hard to fix either.

Make sure, if the head isn't attached to the motor now, that you get it resurfaced before replacing the head gasket...most honda heads warp at least a little, so it would suck to get it all together and have a blown HG at startup.

ekhatch

^^^so if it doesnt make a difference, does that mean that the b18a (obd1) valve cover could fit on a b18b (obd2) head? just wondering, i wouldnt really do it. b18b vc is way smoother

hey, thanks for the useful info man, its gonna help me out when i get the ---- together

danronian

Any B18a1 head is the same as the b18b1 heads, minus maybe some type of small difference, none of which should matter to you. All of the valve covers are swappable. But like a said, the PCV system is different b/t the b18a1 and the b18b1...if you have the older bottom, you'll need to plug up the breather box that is mounted to the back of the block, under the IM. I've never done it myslef, but it doesn't seem like something that would be hard to do.

Project CRXtacy

you want to put a second/early third gen ls in your car? why not save yourself alot of headache, and get an obd2 b18b. especially considering the a1 is gonna have oh well in the range of 100k-200k more miles than the 18b... jeesh.

danronian

It's the same motor... The only difference with obd2 to obd1 wiring is the crank position sensor under the timing cover, and since he's going with an obd1 ecu, it makes no difference.

The mileage aspect is an entirely irrelevant and absolutely stupid thing to say. From my experience, if a 90-93 teg has the same miles as a newer teg does, right now, its probably in better shape and taken better care of. I've owned one 96 teg w/220k miles on it, so the age of the car really does tell you nothing.

Honda-tech type accuracy being ------ on HMT...

Project CRXtacy

honda-tech type? ok lets go... first off, if it was the "same motor" it would still be stamped PR4 wouldn't it not p75? thats like saying all b16's are the same.. hmm why would they all be tagged different? BECAUSE THEY ARE YOU MORON. they may be similar in many ways, but they are still different. thats like saying 2 hondas that leave the factory are exactly the same, they are not.

Another thing, in some states like cali it is illegal to swap in a motor older than your car...

as far as your "mileage" aspect, get your head out of your ***.. do you really believe when someone tells you that grandma only drove the car to and from church and occasionally the store? low mileage b18a is one thats rebuilt completely.

and lets go for a below the belt hit like you did by calling me a honda-tech type.... where is your turbocharged car? have you ever had a turbo in your car.. i dont mean your brothers factory equipped eclipse gst/x either... so come with something now... you step to the heater your bound to get burnt.

WTF

you can reuse your harness im guessing you have a y7 motor, you need to re-pin a spot at the ecu and clip one wire to make it 3wire>2 wire iacv and yes the obd1 block will not have the crank sensor on the oil pump so you will have a cel for that if you run a obd2 ecu, o and the b18a1 have some funny ---- on the intake manifold like actuators and junk id avoid the manifold probly


ive read the a1/b1 have differnces only in the cams and size of the ports thats where the b1 gets a few extra hp, not sure though ive held a1/b1 cams and both had pr4 stamped on them