Would i hurt anything using an obd 0 ecu from a 90 integra ls (pr4). The 90 crx si will be a DD , i did switch out dist from the ls motor to the b20b. The motor was from a 97 or 98 crv. Also using the b18a injectors.
Also 4 2 1 header would not clear without cutting alot of the cross member which i didn't want to do. They were some cheap ebay header some friend gave to me. Does anyone know any header that will almost fit perfect without cutting alot on the cross member. Right know i have the 90 ls stock manifoild n down pipe which sucks.

 

yes you use the pr4 you use all b18 parts on a b20. any b18 header should fit the only time i had to smash in a cross memeber was with a 4to1. what mounts are you using? cutting it is a bad idea.

 

I ran my old b20 like that, did great... Throw some 92-93 LS cams in it too.

 

I have the same setup the only headers that i know that will clear the crossmember without getting a traction bar are the ebay specials, the two piece headers 4 2 1, otherwise you will have to get a traction bar if you want good headers, like big tube try y hytech or rage or dc etc...

 

I run a B20 in my EK with a PR ecu and a B18 header, works great, makes amazing power

 

I just got my hytech header with an ETD traction bar

 

There is no difference in cams between 90-91 and 92-93 this has been long a myth in the honda world, almost as bad as the auto vs manual cam debate. They are the same damn part number thus they are the same damn cam. The only reason the 92-93 Tegs have 10more hp is from the different Intake manifold design and ecu tuning from the factory again not the cams!

B20 is a LS with a 84mm bore. I have one in my crx if you need anymore help or info just hit me up