what is the best piston set for my d15b2 block on the original honda parts. higher compresion. and what is the compression ratio


[Modified by maximedx, 10:54 PM 1/26/2002]

 

The HF blocks supposedly have 10.x:1 compression... i'm not sure how much of that has to do with the pistons, and how much to do with the head.

I've heard slugs from an older d-series teg engine are a popular swap. Not sure about compression ratios, but someone here is bound to know.

 

mista bone will know, he's the d series man

 

HF pistons only have 2 valve reliefs- since it is an 8 valve engine.

 

Not a single HF piston i've seen has had 2 valve releifs. All have had four, like normal.

 

so it makes sense that the hf uses the same pistions as the si/dx and the head gives it the higher compression ratio....

 

Could be right. I'll have to take a look at the hf head i have at my house.

 

you could be right about the pistons- I am not 100% sure- but- the HF head may have a smaller combustion chamber because the 2 valves that are missing are filled in and possibly displace more volume than the valves they replace- just a thought. I'll look into the pistons.

 

im not sure if they would fit due to the 8 valve engine but d16a1 pistons have a higher dome to them. im not sure the differences in the actual d15b2 block compared to the rest of the d series blocks but if its the same bore they should drop in (course i dont know if the pin height is higher/lower on the hx pistons/rods). they have 4 valve pockets but a machine shop can bridge the two pockets on each side so you basically have 1 pocket on each side when you're done. if u did that you'd prolly be >11:1 compression.

 

The HF pistons do have 2 valve releifs- my friend's HF block is that way.

 

ok here is the deal hf slugs are trash wont work. zc/a1 pistons good for about 10.5:1. use them. i have some for sale if ya want. email me.

 

what year is his block?

 

88

 

are you sure midnight that this piston fit on my block with no modification.so if they fit, in canada what car do utilize these piston.

 

88-89 acura integra. i got some for sale if ya want them. they will fit. how do i know? i drove to work with a d15 with them in it.

 

using a 1.6L piston in a 1.5L motor will drop the compression.
3mm difference piston height.

 

mista: even with the dome on the a1 piston?

 

1.6L pistons are 1/8" shorter, that is ALOT when it comes to compression numbers.

Add a .250" headgasket inplace of current one (.040), then tell me how badly the car motor sucks.

 

so the best solution is to buy srp 11:1 piston and put on my block.

 

If you put a1 pistons in a a6 block you achieve a 10.8 c/r.. Not to sure what the c/r of a b2 with a1 pistons will be.. probably not to much more then stock b2. A1 pistons have very large domes. The CC of the ZC/a1 head is alot larger then the dx/si head, that is where the c/r is gained at.

To me it sounds like alot of work for nothing.. unless you got all this stuff laying around, or got it for dirt cheap.

I must say I do like the short stroke of the B2 at times... But I have seen bigger cranks in motorcycles..

Jeff