derick.l

Hi i wanting to rebuild my obd-2 b18b with a blowed head gasket to a ls/vtec. i was just wondering dose it matter what b16a head i use ie obd-o or obd-1 or do i have to use a obd-2 head

D.T.P

You can use any head you want, will just have to use the right injectors to match the harness. If the vehicle is obd2, get a conversion harness for obd1 ecu and an obd1 ecu for tuning purposes.

derick.l

what if i wanted to keep it obd2 what would i have to do?

zeeman

iTrader: (1)

you would need to use an OBD2 GSR ecu (its the closest thing to being the right ecu, since there isn't any stock LSvtec ecu to use) OBD2 b-series vtec dizzy and your stock LS injectors, fuel rail and alternator.

Then you'll need to wire up vtec and the knock sensor (which could be tricky b/c I don't think theres a spot for a knock sensor on the LS block).

To avoid this, you can simply get an obd2-obd1 ecu conversion harness and use a chipped OBD1 vtec ecu and disable the knock sensor on the chip. You'll still need to wire up vtec of course, but it'll solve the knock sensor problem and this way too, you'll be able to run a LSvtec basemap instead of a GSR program.

I have a complete (minus intake manifold and throttle body) b16 head that was used on a LSvtec with the Golden Eagle vtec conversion kit (oil feed line, conversion dowel pins, all necessary fittings) and ARP head studs kickin around the shop, if you're interested shoot me a PM.

derick.l

OBD2 b-series vtec dizzy= obd2 Gsr distributor right, i dont know what dizzy means?

dose this mean i can't use a 99-20 sir ecu and distributor? with my stock LS injectors, fuel rail and alternator

derick.l

i have a knock sensor from my b20b with 8.8:1 low compression pistons i can use. just wanted to keep the easy scanning for codes with the obd2 port

zeeman

iTrader: (1)

Im not sure the LS blocks have the threaded hole in the back of the block. Retrieving codes on an obd1 car is really easy too, all u need is a paper clip

derick.l

i would have to make a connector of some sort to make the ecu show the flash codes? cause it my car is ob2 i dont think has that connect on the passenger side compartment

and your right the ls block has the spot for the knock sensor but no threads, but i sure i could just tap it to screw in the sensor.

i also just want to make sure too that when you say dizzy you are referring to the distributer

zeeman

iTrader: (1)

you don't even need to make a connector, just use a paper clip. All 92-00 civics have the service connector near the ecu. Yes dizzy = distributor

D.T.P

Ok listen,

You can use the 99-00 sir ecu and distributor, but will it run properly with the sir ecu? no. GSR ecu is the closest you will get. The distributor doesnt matter as long as its from a dohc vtec and matches the harness with the plugs. Fuel injectors should be the same as the harness and so should the alternator.

Reason zeeman is saying convert to obd1 is so you could get proper software for the setup and not risk blowing it up. All you need is the obd2-obd1 conversion harness which is like 100$ and an obd1 ecu like p28 thats socketed. Those float around everywhere also.

Regarding the scanning, all 92-00 have an empty plug under the dash, you stick a paper clip in there and turn KOEO [key on engine off] you will see the check engine light flash, you count the flashes and refer to the manual or find it online what the code is. really simple and you dont need a scanning tool for either of the obd gens.

So if you decide to run sir ecu, go ahead, just dont come back bitching about your engine having a hole in the block.

derick.l

i should of been a bit more clear with my questions
my car is a

1996 acura integra rs with a swaped b20b 8.8:1
i have my b18b with the blown head gasket which i want to rebuild as a ls/vtec
i want to keep it obd2 so as you said i should get a gsr p72 ecu to have the best results with out tuning. and like you said any b16 head should work. but my question with a gsr ecu won't i run into problems with the dual-stage intake manifold, the intake air bypass valve must also be wired in place or i get a "cel" unless i do a ls/vtec with a b18c head. so what i asking is with a b16a head am i not forced to use a P2T or if use a p30 ecu from a 96-97 del sol would that work to avoid the problems with a p72 ecu

D.T.P

IABs wont throw a cel. I believe its the same as the h22 manifold an is controlled by vacuum, and ecu has nothing to do with it.

zeeman

iTrader: (1)

You can use the GSR ecu without having to wire up the IABs. Another option is to use an ITR ecu but i think they have immobilizers.