I have a '90 CRX and just put an engine in it. It is a B18C5 block and crank, with all GSR (B18C) internals and head on it. B16A1 computer, and transmission (needed a cable trans). It is running stock CRX fuel pump, lines etc. I changed the exhaust to a more open muffler with 2 1/4 pipe from cat back with the cat punched out.
Now the thing is : I got this in and running, no codes etc., but I went up against my friends stock 97 Lude and sat almost side by side with him in 1st and 2nd, him pulling a little in each gear away from me, but when we into third he started to leave me behind.
What the HELL. I'm at 170 hp with the engine and he's at 200 HP, but I'm 1000 lbs lighter then him. Something is so wrong here. I know this swap and I know that the car should be running well into the low 14's. So what is wrong here.
I don't understand at all. the V-tec is kicking in and there seems to be no real problem, but I'm slow as hell here? I am going to be doing a compression test later today to see if that's ok, but I still think that I should be doing better then that, considering that the Lude is at best ( and I mean AT BEST) a 15.0 car.

Please help me or give me any suggestions possible. I would really appricate it and would be very greatfull.

Thankx..............

 

Get some way to adjust your fuel maps, and get it to a dyno. I'm not real sure that your B16 ECU is providing enough fuel for a 1.8L engine.

 

A B16A head on a type R block (B18c5), why? It has a GSR B18C head on it right on (1.8L). B16 is a 1.6L. how would you get more flow, the B18 has larger internals in the head....doesn't it ?!?!?!

 

Don't change to a B16 head, the B18C1 head has smaller combustion chamber (slightly) and same size valves so you'd actually be hurting yourself if you did that. If I understand you correctly you are using an OBD1 or earlier computer on an OBD2 block. Are you sure all your wiring is OK? It sounds electrical to me, if your head was leaking you would notice coolant or oil coming out. the fuel pump doesn't mix fuel, it just delivers it, I suppose it could be the problem as it is used to supplying a car with only about 100 wheel-hp now you are asking alot from it.

Don't bang on the Lude, it may be heavy but I've driven an SH, it's faster than people give it credit for. It's definitely faster than an Si which is supposed to be 15.2 or 15.1 not sure which. It was a LOT of fun, I'd trade my Civic up for one instantly.

 

hey guys, i guess the hybrid veterans haven't really seen this thread so i'll add my $.02

you have kind of a strange combination. essentially you're running a GSR motor on a B16A ECU. this is no good. you'll need be using a custom ECU with a better fuel map. also, if you assembled this motor yourself, did you give it time for the piston rings to seat before your revved like mad? do a quick compression check and let us know. the JDM B16A SiR2 head is far better than the B18C1 head. the B18C5's head is just a p&p B16A head.

best thing to do right now is get it on the dyno. see what kind of numbers your making. also if you know anyone with a custom ECU, bring that along as well and dyno with that. see if the source of the problem is the ECU's fuel map.

good luck

 

Oh, well was at the shop last night. On monday he is going to get me a re-mapped ecu for the computer on a gsr computer. Also did a compression test and it ran 220 psi across all 4 pistons. He is moving the battery to the back of the vehice (a dry cell) so we can put a custom intake in and then checking the fuel pressure to makes sure everything is ok. At that point if its not working right, Im not sure whats what.........................Hmmmmmmmmmmm

 

dude that crx fuel pump may be able to keep the pressure up down low but it is not going to flow enough fuel at more open throttle levels. i wouldnt doubt it if your running dangerously lean. the ecu is also gonna play a big factor in that. get them changed.

 

I'm guessing you are using a GSR intake manifold with a b16 ECU, which is BAD mojo.

 

yeah almost forgot about the secondary intake runners, if those dont open you'll be a slug at higher rpm.

nice catch.

 

To me this was a simple question and every reply was good. The ECU and the CRX fuel pump was definitely the problem. Also you did the right thing when you did the compression check.