94d16zdvtec

i know the bore size is 75mm on my d16z6 i wanna know if i can make it bigger and can i put a diffrent crank and and get a longer stork for more top end

ddd4114

Yes, you can bore it.

A longer stroke will beef up the powerband below peak torque more than above it. Keep in mind that the rod ratio of d-series engines is bad enough.

94d16zdvtec

what bore can i go up to and where do i find the bigger sleeves , blockgaurd too

pumpkinz6

look in honda tuning. they did a write up on stroking a d-series. they used parts from an a7,z6, and y8 i think, not positive.

blk92_d16

Factory service limit with a full stock motor is 40 over...76mm.

You can get sleeves if you plan on boosting it too!

CALC!_JUST_du_IT!

I think the largest bore you can get to is 78mm (77mm is the largest bore I've ever actually seen) on a sleeved block. Unsleeved, you can take it to 76mm. There's really no need to have it sleeved and take it to 78mm unless you're pumping out more than 200whp, which you probably won't be able to achieve with an NA D16. On NA D's, you can get virtually the same max power with a 76mm bore as a 78mm bore, and there's no need for sleeves.

I don't believe there are any production stroker kits made for the motor. I think it can be done with a combination of oem parts, but that will take a bit of research. If you want to go that route to have a unique build, go ahead. If you're you're looking to make more power out of your D, this isn't the direction you want to go.

If you want to beef up your NA D, you're gonna have to raise the compression and chose an appropriate cam for your goals. Building the bottom end won't do much for you. A good set of rods will give you a safer motor if you plan to rev above 8000 rpm, but even your stock rods will be fine then if you have them shot peened.

Once you've raised the compression and installed a proper cam, bolt-ons will play a huge role. Once again, just make sure they're appropriate for the goals you have.

I hope I've helped point you in the right direction with your build... Good luck!

ddd4114

You can have an 81mm d-series (sleeved), but I wouldn't recommend it.

I believe there is one stroker crank for d16's, but I forget who makes (or made) it. I'll have to look into it. You can put a d17 crank in a d16 block, but that's also not recommended. If anything, d-series engines should be de-stroked.

As stated, if you want more power from your engine: more compression, more cam, better manifolding

CALC!_JUST_du_IT!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ddd4114 &raquo;</TD></TR><TR><TD CLASS="quote">You can have an 81mm d-series (sleeved), but I wouldn't recommend it.</TD></TR></TABLE>

Exospeed and other builders say the most they will bore a sleeved D to is 79mm (78mm with most sleeves). Who out there is boring them to 81mm? I'd think that'd be worth looking into... Matching the combustion chambers to an 80mm bore, and mating with the right head could render the effort worthwhile.

ddd4114

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CALC!_JUST_du_IT! &raquo;</TD></TR><TR><TD CLASS="quote">Exospeed and other builders say the most they will bore a sleeved D to is 79mm (78mm with most sleeves). Who out there is boring them to 81mm? I'd think that'd be worth looking into... Matching the combustion chambers to an 80mm bore, and mating with the right head could render the effort worthwhile. </TD></TR></TABLE>
81mm has been done a few times, but I forget by whom. I know there is some info on d-series.org, and you can do a search there.

I know that head gasket problems should be pretty much expected, and there are much better ways to improve power than bore the engine by that much.

94d16zdvtec

thanx to all for the advice doing the head work this weekend port and polish bigger valve and stronger sping cam is on the way cant wait

ExospeedAMcrx

To do an 81mm bore D16 block in my opinion is NOT worth it for MOST setups. Unless you have the time, the excess money to play with something like this, I wouldnt do it at all.

Like with any setup, you really just have to see what is practical and economical for your budget and your goals. Its like people that ask us to build a big bore stroker B18 for a car they just take back and forth to school and never race. there are other options you can do to get the power. Don't over complicate things when you dont need to.

The big big bore d16 can be done, but the question is, is it worth it for what you're doing.