imported_eric

bored out TB on a D15.
worth it or not?
i have an extra TB (intake manifold even) lying around
just thought i good put it to good use.
thanks.

imported_eric

25 views.....
no response.....
anybody?

illmatic_si

go for it, see if you get better pull

whats the cost involved?

imported_eric

i dont wanna do it and find out i wont gain anything.
that would be money wasted, thats why im asking around.
as for the cost i saw a post way back but forgot how much.
i just wanna find out in theory if it would gain some or a lil bit of power.

thanks for the reply.

imported_eric

and one more thing, im looking to get more from the lower power band as oppose to higher rpms.
i drive mostly on the streets now and i dont get up to the higher rpms so theres no point having the power there.

Rice Burner

Do you have intake, header and exaust done yet? If you don't, not worth it. If you do are you planning for any swap seeing your engine is only a d15, again you won't gain much.
Personnaly dont think it's worth the $200 for a throtle body.

donesixer

Try a cam from a 91 CRX or Civic Si. The cam is half a tooth out of phase so you will need a cam gear as well.
Throw in a head gasket from a 96-2000 Si. It is thinner, more compression.
Throw on the intake manifold from a 92-2000 SOHC VTEC.
But the biggest thing, get a B18B throttle body. It is larger, and stinkin' cheap. Port match the intake manifold to the throttle body.

imported_eric

intake and header has been done.
not planning to swap a b series anytime soon.
donesixer: are u saying the b18b TB will bolt up to my stock intake manifold, just need to port match it?

thanks guys.

donesixer

Yup, it will bolt right up. If you have the D15 manifold, swap it for a '92-95 manifold or '96-'2000 (better).
This is all assuming you have a 5th gen DX. The 4th and 6th gen DX has a down-draft set up that should be pitched.

imported_eric

i have a 5th gen EX if that makes a difference.

imported_gatherer

donesixer has great advice ...

with air flow I see it this way start freeing up the flow path from the parts that are furthest away from the engine and work towards the block ... once you get there then have the block built up and go from there...

imported_eric

ok cool so i can get a B18B TB port match it then im set.(maybe, not quite, but getting there)
one more question in my head is, has anyone done this with no problems and reliability issues.
thanks guys.