so i have a JDM D15B with the D16Z6 head in my rex right now and pistons are hard to find for the JDM D15B and i cant get the same answer out of people about other piston options. i did find the p08 pistons but they are 180 bucks for only 1. so i have a D15B2, but can that motor use the P08 ECU? and can you use the D15B crankshaft in the D15B2

 

anyone

 

bump!!

 

Your gonna be hardpressed to get a same answer from different people cause every one has their own opinion and different level of knowledge. Basically for easy to get oem pistons 01-05 civic have almost the same compression height so those will work, just pick which ones you want to get the compression u want ie dx/lx, ex, or the rare gx.

 

i would stick with the jdm d15b cause they have the same rod journal size as a d16 wich also means that the main journals are bigger so the d15b crank wont fit in the b2 so the d15b has a stronger bottom end and the b2 rods look like tooth pics

and for the pistons i would use this link to find a set of pistons that you like the cr of and order a set of 75.5mm pistons off ebay and have the bloc bored out

http://www.zealautowerks.com/dseries.html

 

That is where you are wrong!! The d15b vtec crank share the same size ROD JOURNALS. Not mains. Allowing you to use d16 rods. Yes the crank will fit in another d15bx . NO it wont fit into a d16.

Come on people! If you dont know , If you have never done it, or if your friend of a friend , of a cousins , sisters , boyfriend did it, and YOU did not.... Dont give out false information... Its really okay if you dont know.

 

doesnt the d15b have longer rods and shorter stroke than a b2,etc...?? if so i would use the b2 in a mild all motor app. for more torque but thats me....the ecu shouldnt play a roll in the bottom end choice

 

thanks 4G and madmood..see id love to keep the D15B, but like i was saying i found pistons for the D15B but they are 180 bucks for one piston. The GX pistons will fit but that would but 200 bucks for 4. I found a D15B2 engine rebuild kit for only 250 bucks which has every thing i need. and if i can keep the crank shaft for the B2 i'll be happy.
but madmood i agree with you 100% about "If you dont know , If you have never done it, or if your friend of a friend , of a cousins , sisters , boyfriend did it, and YOU did not.... Dont give out false information... Its really okay if you dont know." and thats what was confusing me because every one had a different answer.

 

I highly suggest you search more on like one cam only or d series . org, not too many people on ht deal w/ single slams cause they're not mad sick dohc nos vtec jdm yo!!!

 

Ok... There are 2 versions of the "D15b". One comes with factory dual carbs. This one is the same internals as the d15b2-3-4-5-6-7-8-9 etc...

The d15b that comes with the vtec head and injection, has the same rods as the d16's. Meaning that the crank is not the same as any other d15b.

 

was that english??^^ and what do i need to search for on d series or one cam only? when i pull the D15B out i can measure and compare bolth the cranks to see if it will fit. honda-tech has good info but your are going off off what people think 50% of the time. And yes thats just my opinion.

 

how can you find out what version you have of the D15B? because when i bought my crx it had the D15B block with the D16Z6 head. i was going to go with the full D16Z6 swap but i do not have much money to rebuy every thing i need like a ecu tranny etc...

 

Only way to be sure is to pull the pan and measure the bearing caps.

Why not look for an A6-Z6-Y8 in decent condition? The pistons/bearings and machine work would cost you just about as much as one of these engines. You dont need a full swap just the engine.

The p08 can be used but you will get codes for vtec, you can find p06 ecu's all day for $20-40. If your D15B2 has a DPFI intake manifold just put on the Z6 one.

 

i guess if the pistons say P08 on them its a jdm d15b vtec, if not its one of the others. Are you sure it's a z6 head thats been swapped on some random d15b block....or is it a jdm d15b vtec that comes with the z6/P08 cylinder head from the factory????????

 

also, why in the hell would you have to buy a new tranny to do a d16z6 swap??
and i would %99 gaurantee that a p08 ecu would run fine w/ a stock d16z6 engine

 

because i do not have the money to buy every thing. i have the JDM D15B with the Z6 head in my car as i speak my friend has a B2 sitting in his garage that he pulled out when he bought his crx. He told me 50 bucks for the damn thing so i can build the B2 and still have a car to get to work and all that.

 

yes it was engrish, you can't type in the exact website cause h-t is fukin gay and blocks everything like little bitches. Im just saying, you need to search on more d-series type sites cause d info is lacking on h-t

 

sorry if i read this wrong but im pretty sure that he just said the d15b vtec crank wont work in the b2?

 

because only the JDM D15B is stamped with 4 numbers the usdm is with 5 numbers like D15B2 etc and for the z6 head is i got a rebuilt Z6 head on line and its the same as the one i have in my car. im also running the p08 ecu...thats how i know what i have

 

k, i re-reread the op, so what i think u want to do is basically put the z6 head on the b2 block and put that in your car?? the d15b vtec crank will fit in a b2...but then you'll need to run the d15b vtec rods(same as d16z6) which means d15b vtec pistons or d17 pistons

 

by putting longer d16 rods in the d15 block wouldnt that make it super high cr? or are the d17 pistons super low cr making it mild cr in his case?

 

so the D15B crank will fit in a B2? but you need different rods then the B2? if thats what it is then im going to stick with the B2 crank. i work night shift in a machine shop so this needs to be a quick build for me

 

No, because p08 and d17 pistons have a lower compression height, ie; the pin is located farther up, that way a longer rod can be used without the pistons sticking out of the hole.

 

.......i see

 

got the D15B2 engine today 50 bucks is not bad :D