How to stroke a honda motor

[dan03235]

parts needed
-d16 block, I used a y8 because it was free and still 75mm thanks brett bracket
-d17 crank,rods, pistons the dx/lx pistons give a taaaaad more CR $75 bucks off CL
-Rings for a d17 I went NPR
-D16 main bearings I reused the d17 rod bearings $65 for both on ebay

deck the block .030 you can go more but I have pics of what .030 looks like $50


keep your #!#!#!#! organised shop towel and marker do wonders


gap your rings accordingly If you are staying NA (PUSSY) go with stock specs per helms manual, since mine will be boosted eventually I went a little loose at .014 top and .016 bottom

clock the rings accordingly (use endyne ring clocking pic) and throw those bastards in


since I reused everything I kept it organised and cleaned it with carb cleaner


put the bearings in with lube on bottom and on top


crank goes it fallowed by plastigauge then the main gurdle. Oil up the bolts tq all of them to 18ftlbs then to 38ftlbs (I hope the sequence is obvious work from middle outward) remove it and check clearances.

I lucked out and with std bearings (king) they all landed at .0015 but anything below .002 is OK if you are touchy about your clearances go with honda OEM bearings all STD, measure with plastigauge, then using the different color bearings dial in the clearance you want
Hope you notched that gurdle! its TIGHT not sure if its needed on all blocks I also always clean up any casting flash to help the oil return to the pan


all done



for life d16 stroker will be killing stock GSR swaps all day long!

Ill post up the oil pump, rear seal, and crank pulley setup in a bit!

[dan03235]

the d17 rear main seal appears to match the d16y8 block perfectly all 4 bolts went in and the dowel pins all lined up how they should


d17 oil pump is the same


when I dropped the block off at the shop like most y8 blocks it came with a free spun bearing mod! so I gave him the y8 crank to use as a template

timing belt gear fits like a glove


crank pulley as well


no i wont be using the light pulley already killed a motor due to using one so a stock a6 is going on or ill have a y8 shaved down....dont know yet what do you guys think?

[Dagazenterprise]

best thread ever, love it

[dan03235]

best thread ever, love it

thanks dag for around 200 bucks it will be making the same power as a stock 1.8l DOHC honda motor and will have a broader tq band

only issue is the now 1.45 rod/stroke ratio its less then desirable but I just wont rev it to the moon and it will be ok im thinking 7200 or so it will stop making power so no point in going higher

[N9nefiveAccord]

I've never heard of this before. Very cool, has this been going on for a while or is this something new and figured out?

[dan03235]

I've never heard of this before. Very cool, has this been going on for a while or is this something new and figured out?

I think the 1st one was done in 03 or so but people were scared of doing it due to the large number of parts used off different model engines

I would say that fewer then 50 have been built online that I have found and nobody in the tristate area that I have found has built one. It's not 100% straight forward but if you want to build one this guide is a pretty good walk through.

[tim1137]

I read up on this a few years back too, seems ok, but alot of work for not alot of gain.

[dan03235]

I read up on this a few years back too, seems ok, but alot of work for not alot of gain.

I needed rebuilt motor anyway and the d17 was 75 bucks you can also use a b16 crank pulley and have no machine work done, for me it was cheaper to machine it haha

[ill_eagle94]

Pretty cool read man, keep this stuff coming!

[dan03235]

Pretty cool read man, keep this stuff coming!

Thanks I like using what people consider "junk" putting it together, and having something not done too often

[Zoom6]

As a "how-to" I think this should be in the tech section.

Great write-up man. I'd love to see more of this stuff on here.

[BLACK-OUT]

i'd like to test this beating a stock GSR swap. Do you have a rough idea or a dyno sheet showing the power that this stroker should do? What will it bump the CR up to?

[dan03235]

Here is a dyno not sure you can see it

http://www.d-series.org/forums/attachments/naturally-aspirated/14751d1179528259-n-d16y7-final-dyno-run-video-dyno-sheet-dyno-sheet-mai-2007.jpg

120whp with 9.7:1 CR I'm going to be at 11.4:1 so it will make a bit more
The main thing though is look at the tq! 100+ftlbs from 2000rpm to 7000rpm that's a pretty broad range that is hard to find in the Honda world

On your other question of what CR it will have you can pretty much set it to what you want, to get the pistons just about level mill the block .030 then it all depends on the head a y8 will put you a bit over 10.5:1 a z6 right around 10:1 use the calculator over on zeal auto works to dial in the CR you want

And if you have a gsr swapped car and it's stock I would love to test it out too!

[dan03235]

anyone notice what I did wrong on the build?

I kinda found out after looking at the pics lol

either way its been fixed now so its ready to drop in! just waiting on the VR6 swap to be done in manch so I can get the engine lift back and its going in!

[ill_eagle94]

anyone notice what I did wrong on the build?

I kinda found out after looking at the pics lol

You didn't build a K series?