how can i fully build my d15

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ernestoexpresso

New Member
im doing a mini me swap om it so i wanna know what are the internals needed to fully build the motor can you list the stuff for me
and list the way to do it if i wanna turbo it too
please and thank you
 
this info is all over the place. try searching first next time.

a full build will consist of:
forged pistons
forged rods
new rod bolts
new main studs
new main/rod bearings
re-sleeve with darton, aebs, benson, etc.
thatll get you there on the bottom end. headwork is a whole different ball game.
 
^^^that's all true
but forged parts are more common and less expensive for d16 than d15.
(recommend you use a d16 block instead of d15)
 
if you use your d15 block, definately do new:
forged pistons
forged rods
new rod bolts
new main studs
new main/rod bearings
get low compression pistons if you plan to boost, and it help to lower the compression by using a d16z6 headgasket. as for the head, get it machines to about .30 and port/polish. ive done a d15b7/d16y8 mini me before and used a dsm 14b turbo, jdm sport front mount intercooler, greddy S blowoff valve, ram horh turbo manifold, blox intake manifold, tuned on chrome with a apexi safc2 to run 18psi. used eagle ibeam rods and low compression pistons, didnt sleeve the block, jst updated the internals and bolted on the parts. id reccomend going the whole nine yards though if you can afford it.
 
lower the compression by using a d16z6 headgasket

i'm not 100% sure why everyone thinks that if you're going to turbocharge a car, you need lower static compression to do so. sure it'd help with cylinder pressures at higher boost levels, but it also is going to rob you of some power.

IMO the ideal static CR for a turbocharged setup that is just going to be street driven is right around 9.0:1 - 9.5:1. i have seen quite a few cars turbo'd at static ratios from 10.0-10.6:1 and no problems whatsoever.

the only situation that i see fit for lowering the compression is on an engine that has very high stock static compression and it is your first turbo build. in that case it might be wise to lower the compression to allow for some more room for error while tuning.

otherwise, leave the compression stock, and turbo it. you wont have any issues with what you're doing.

edit:
and, being a d15 (already a turd) lowering the compression further is just going to make your d15 seem even slower out of boost. will also slow spool time on the turbo slightly.
 
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