Rep Power: 267

Alright...I need to know if there are any differences what-so-ever in an A1 block and an A2 block (i.e. plugs, bolt holes, anything, etc.) I am currently sick and can't get out of bed for a few days to check it out myself; so I am hoping somebody will be able to help.

Thanks,
Aaron

anybody?

 
Rep Power: 338

well, the A2 block has to have different pistons....... but I think the difference is in the head where the cam profile is pretty different.

 
Rep Power: 267

The bore, stroke, and pistons are the same on both blocks. Rep for tryin' though. At least somebody tried.

 
Rep Power: 811

different compression, different head (vtec solenoid), different cam, etc

 
Rep Power: 267

Cool guys thanks for your help so far, but it's still not what i'm looking for. Let me clear it up. I'm still stuck in freakin' bed so I still am unable to look for myself. My car came with an A2 block so everything I have is for an A2 block. I have an A1 block that I have stripped down and I am about to have it sleeved. While I've been stuck in bed I've been reading through the Helms Manual and ran across a posssible problem. According to it there is a difference in the stiffener brackets from the A1 to the A2. I need to know if anybody knows if the brackets from the A2 work with the A1. Also, if there are any other differences (i.e. the holes for sensors (has/doesn't have)). Sorry for my rambling and being a pain, but this is quite important.

 
Rep Power: 811

hopefully someone posts tomorrow. i know there are members who know these things but there's nobody on due to spring break. i know the a1 head doesn't have holes for the vtec solenoid.

 
Rep Power: 267

yeah, but i have my a2 head and everything else so thats not a big deal....just bolt it on.

 
Rep Power: 297

block castings are identical with the exception of the piston which provides the higher compression

 
Rep Power: 297

latter half of the info being incorrect.. please elaborate..

d17a1= lower comrpession
d17a2= higher compression

whats incorrect?

wel. in your case let me elaborate even more...

d17a1 = 9.5-1 115hp @ 6100rpm 110tq @ 4300
d17a2 = 9.9-1 127hp @ 6300rpm 114tq @ 4800

displacement on both motors is 1668cc

bore and stroke on both engines are 75 x 94.4

and the obvious the a2 has VTEC....

 
Rep Power: 267

Well after further researching of part #s it turns out there is a difference in the pistons and xproductions is da man. Learn something new everyday.

 
Rep Power: 811

ya i would trust what he says. he started the whole vtec head swap diy and i believe owns his own shop, does own work, etc. He knows whats up.