I found a cheap 88-91 CRX DX head (automatic tranny). I wanted to get it and play around with it...possibly work on it and install it on my 91 Civic Si.

Question is, outside of the cam/injection, is there any difference between the two heads (DX and Si)?

 

don't think so

 

the heads are the same

 

You guys are 100% sure on this, right? No port differences, valves, etc...

 

yes, they are the same. only diff is the cam and cam gear.

 

same head.

 

I think the valve springs might be different. Reasoning: the 92-95 dx head is the same casting with a different cam and in 92-93 the valve springs were different and in 94-95 the valve springs were the same as a d16a6 head. Because of this is why I suspect the 88-91 dx valve springs to be different from the si, if not then the 92-93 probably would have been the same too. Call Honda and check part numbers.

 

they are for sure the same head, however the cam and valve springs were different. however, if you now go to honda to get replacement valve springs for the DX head, they now offer up Si springs as the replacement to consolidate part #s, but from the factory, the DX had the weaker cam and springs, despite being the same casting and porting.

 

2 points for u. u are correct. teh dx springs are weaker and teh cam is not much differnt nut different none the less. i just got a 97 Y7 head same as the a6 head basically different head though inside

 

so if you swap to the si cam is it required to swap in the si springs?

 

Might as well since you're in there already.

And Newark, OH, huh? Man, sorry about your luck

 

where in ohio are you Todd?

 

The only differenc in head is int the HF head.. Its only 8 valve and the intake ports are smaller but the dx and si heads should be the same, Im planing an replacing my dx head with and Si just because I have the Si head and the DX one has problems

 

Newark OH eh?? Route 13 south past Thornville, onto Somerset, then New Lex, detour to Crooksville, was there last weekend.

 

I was in Newark last weekend- off 79 north of 70. I see you guys got an Olive Garden- moving up to the big time eh?