Re: e30 throttle body mods

["Gary Derian" <gderian@xxxxxxxxxxxx>]

A large throttle body makes the engine feel more responsive because it opens
more area for a given throttle angle.  This is the same as altering the
throttle linkage to open the throttle farther during tip in.  There may be
no gain in power at all, but it will feel quicker around town.  This is a
common technique to make low powered cars feel peppy.

Gary Derian <gderian@domain.elided>

> you are speaking about a stock motor, right?  i've got an '88 325iS w/ a
> Korman stage II comp. head, 288 cam, long-tube headers and a tri-flo
> exhaust.  the car still has a BONE STOCK intake (ok, i had a cone filter
kit
> on it that i took off a while ago after hearing about how horribly K&N's
> flowed).  the only thing i can think of that is wrong w/ the car is that
> it's got that stock intake on it.  another local e30 guy (Kyle) took me
out
> in his modded 325iS that had similar mods as mine as far as the head went,
> but he had a big-bore throttle body, big-ass cone filter, and a
port-matched
> intake manifold.  oh yea, he didn't even have headers on it at that time,
> but the thing felt a lot more responsive than mine, and seemed to pull
just
> as hard.  when my car had stock manifolds, it ran like complete crap and
was
> slower than my mother's bone stock '91 325isA, even though i had the
korman
> head.  the only thing i can attribute his greater amount of power to is
the
> intake mods.  oh yea, he had a custom autothority chip that i tried in my
> car on the same day; his still felt better.
>
> -jason mccowan  <<crazy modded e30 that would be lucky to run 15's.
> ncc

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