D16 Rebuild

[nd55]

> If it was up to me, I'd say spend your money on a B-series conversion.

x2. The gear ratios on the D16 gearboxes ain't the best.
It can be a pain in the bum to fit a LSD, too.

> I have read some good reports on the Nippon Pistion Sets.

I don't know much about the Nippon's. I think they are OEM spec.

It's the YCP brand pistons which have been used for most high
Hp turbo D16 builds.

> So i was thinking about going High compression although from what ive read this isn't desirable in turbo applications.

Not compatible with super boost or lax tuning.

The typical YCP Vitara piston on stock length D16 rods build is a low compression motor (8.0:1).

I think FJT has available some custom length rods which restore some compression. If you're gonna spend good money on rods use these.

YCP Vitara pistons are shorter (~2mm) than stock D16 pistons which is the reason for the reduced compression.
Not sure about the Nippons.


> I have a friend who has a set of Eagle H Beam rods and wants to know if i want to buy em.

Depends on the price, see above.


> Will the H Beam Rods fit either set of pistons or is the pin a different size?

Stock piston pin on a D16 is 19mm (interference fit).

YCP Viatara pistons are 19mm piston pin (floating) and are supplied with piston pins and retainers AFAIK.

The stock 75.0mm size YCP's are supposed to be a little loose, but that hasn't stopped anyone making big numbers.

75.5mm YCP's require the block to be bored out, and thus you can choose your clearance.

76.0mm pistons are beyond what Honda recommend for the D16 block.


> Eagle H Beam rods are good stuff but you'll need to notch the block for those bad boys

Most aftermarket D16 rods require block notching. Some require notching the crank girdle too.

Factor in some machine shop time when budgeting for these.


> Will build this motor tight and transplant it and rebuild the existing one to be better for the turbo application.
IMHO the YCP Vitara piston/H beam rod combination is a very widely used/abused for a D16
If you choose a reasonable compression ratio there isn't much difference between a NA and a turbo build on the D16 block.
NA D16's are D16's which haven't had the turbo bolted on yet.

Nick.

[RobboEK]

Thanks everyone for your input.

Am i right in saying that with the lower compression YCP Pistons being a dish top i can go with a cam with a higher lift?

Can anyone suggest a good mild cam? I'm not building this to be the most powerful engine as i mentioned i just want the power there when i want it. and being non vtec i think i would like the cam to come in at about 2500-3000 RPM.

[nd55]

> Am i right in saying that with the lower compression YCP Pistons being a dish top i can go with a cam with a higher lift?

There's heaps of clearance, no question.

The problem is raising the valve lift at 3000RPM, is not gonna get you any more horsepower, very possibly less.

When changing camshafts it is usally for slightly higher lift AND longer duration to improve high rpm performance.

This WILL mean a loss of torque at the rpms you are considering.

People resort to turbocharging D16's for a reason.

Seriously, for the price of a rebuild with forged rods, pistons, cam etc you're well on the way to a B16.
A B20 if you're not wanting to rev it out too much.

If you're still stuck on rebuilding the D16, look at Tighe cams for a mild regrind.
Zex 105300 (D16y8's), 95300 (D16Z's) for a high lift, normal duration turbo cam, new core.
Cam choice for a non-vtec sohc is either Bisi in the states or Tighe locally, both regrinds

Nick.

[nd55]

> And PM Weq,
> I don't know if he'll share his experiences with you,
> But if he does, you would do well to listen.

Robbo & Weq,

any chance this correspondence could be made public.
There's a few of us flying the D16 flag who are interested.

Nick.

[MikeyG]

Weq doesnt come on ozhonda much and usually dont talk unless he wants to thats how he is. so even if u pm him he wont pm back im guessing

[Lukezen27]

> And PM Weq,
> I don't know if he'll share his experiences with you,
> But if he does, you would do well to listen.

Robbo & Weq,

any chance this correspondence could be made public.
There's a few of us flying the D16 flag who are interested.

Nick.

Dude like MikeyG says don't bother giving Weq a PM

While he has done it and done a lot he only posts to pick on people most of the time lol

Wasted Knowledge in that guys hands!!

[Fo55il]

yo, i was thinkin of rebuilding my bottom end.

so the kit from fj should be ok to increase boost to bout 12 yeah if needed?

i dun wan spend an arm n a leg tho.

400ish seems ok

or should i jsut stay wid stock bottom.

i just want a daily + weekend fun.

for d past year ive been happy wid the stock boost performance.

should i bother if i wnated to keep boost to 10-12?

[Lukezen27]

yo, i was thinkin of rebuilding my bottom end.

so the kit from fj should be ok to increase boost to bout 12 yeah if needed?

i dun wan spend an arm n a leg tho.

400ish seems ok

or should i jsut stay wid stock bottom.

i just want a daily + weekend fun.

for d past year ive been happy wid the stock boost performance.

should i bother if i wnated to keep boost to 10-12?

built bottom and stock top is the cheapest rout..

Stock head good for like 300+ HP

[nd55]

> so the kit from fj should be ok to increase boost to bout 12 yeah if
> needed?
>
> i dun wan spend an arm n a leg tho.
>
> 400ish seems ok

That kit will include Vitara pistons, rings, bearings, seals etc.

You will need to add forged rods for a good boost (10psi+) build.

Nick.

[Lukezen27]

> so the kit from fj should be ok to increase boost to bout 12 yeah if
> needed?
>
> i dun wan spend an arm n a leg tho.
>
> 400ish seems ok

That kit will include Vitara pistons, rings, bearings, seals etc.

You will need to add forged rods for a good boost (10psi+) build.

Nick.

Yeah I asked why he didnt just include con rods in the bottom end kit and but done with it but he never replied

[beeza]

Bisimoto sells top quality (probably the best) for the d-series.

http://www.bisimoto.com/

[lookingforboost]

from what i have read around the stock rods are good for 220hp and thats there limit... they will fail after that, so unless your making upwards and over 200hp then the stock rods should be fine to run a boost level of 10psi

in the end the D16 bottom ends are pretty cheap so if you blow it you should be able to find another one pretty easy