New guy, advice would be hot...
 

Hi all, I just "bought" a 90 civic si with some mods and was looking for some advice on the mods. as i said the body is a 90, however the block is from a 95 1.5l (8 valve) and the head is from a 96 1.6l (16 valve). I don't know if this is a common thing to do. but I was wondering what i would need to know about it to have my car run well. I do have the original 8 valve head to the block. the main problem is that right now the car sounds like it is out of time and after a few moments, the engine light comes on and retards the timing. any advice you all have would be greatly apreciated. Oh, also, I am something of a mechanic so don't worry about being technical, I just have experience with 4x4's. this is my first honda and I wasn't sure if i needed to know anything specific. thanx.

I think that u just have the SOHC VTEC on the thing. I dunno what retards the timing.

its sounds like someone tried to make a D15B Vtec motor. which i heard is nice if done properly.

it sound like he did it wrong. i would suggest putting back on the D15 non vtec head. then just buy a D16 vtec motor when you get the funds. also for the timing retarding it could be he upgraded the timing belt with the Greddy. i heard it really screws up timing if not tuned right. but i could be wrong!

Re: New guy, advice would be hot...
 

both heads are sohc, just one has 16 valves instead of eight. the timing belt tensioner is maxed so could i just need a smaller belt?

you would want a tight belt.

yes both heads are sohc. but ones actually made for that motor. D15s' were never ment to be Vtec.

if you want more answers and a lot fast post this up in the civic forum. almost everyone will look at it there.