dklein

what is the best head-swap option for a d16y8, or it is even worth it...?
i'm a noob, so a stupid question: can a sohc v-tec be converted to dohc v-tec from a head-swap? (i'm guessing not).

also - has anyone switched out for a hi-perf 62mm throttle body on this engine...? if so - what perf gains did you notice, if any?

thanks!

hope you all had a good weekend.

-d

R666_EK

Leave everything as is.

You won't gain from a head swap. The only other real option would be a z6 head but that would be completely pointless.

No the DOHC heads WILL NOT fit on the D series.

Without other supporting mods an upgraded TB will not do anything for you.


And yes I had a good weekend. Thanks.

dklein

thanks for the info.... ;-)

Jimster480

ya there is no point in a bigger TB unless you bore out the intake manifold plenum to be able to support the bigger TB. And the real power gains are on boosted cars anyway.

boxeocampeon

leave the y8 head and turbo it

Vindicator9000

^^^THAT^^^

y8 or z6 are the best single cam vtec heads you can get. They're a little different, but very comparable to each other, and it's a tossup as to which one's better, so definitely stick with the y8. It's not worth the money to swap a z6.

And no, B series and D series are not compatible, which means you can't put DOHC B series parts on SOHC D series engines.

Slo-mo

what about the DOHC zc head? can you put that on and gain anything?

dizzy_drifter

the dohc zc is NON-Vtec for sure, thats a negative...wont work. have you already done the simple bolt ons? header, exhaust, cold air intake. if you have you could do a cam, valves, and some better valve springs/retainers.. thats what im doin, ive got a y5 bottem end and y8 topend, now im building the head up a bit. i got the crower cam stage1

dklein

i was looking at the cower cams earlier this week....did you notice any significant improvements once you got the stage one in?

or did you need a re-tune before you noticed a significant improvement...?

Jimster480

z6 head is better than the Y8 head for boost. It flows a bit better and it has a bigger combustion chamber so it doesnt have as many issues with detonation.

rndmheroxx

would it really be worth the money to swap a y8 for z6 head though? ive got my turbo build coming along, and being tight on my budget it isnt really a question for me...just wondering

Jimster480

um. well it depends on how many miles are on ur y8 head. And how cheap u can find a Z6 head for. But the head is the only thing u want. The Y8 manifold is the best flowing mani. So you want to keep that. Z6 heads are better for boost, but honestly if u have to go out of ur way to get a Z6 head dnt worry about it. the Y8 head isnt super bad for boost, its fine, just not as great as the Z6 one.