TyFc3s

hi im wondering about an idea thats been in my head for a few weeks now im curious if anyone has tryed bridge porting the top ports in a 6 port engine i think it might help the fuel consuption problem and the lack of low end power i would port the sleeve as well as the plate and im curious if anyone else has tryed it or even just thought about it

RacerXtreme7

iTrader: (2)

It's been done, most have failed to produce positive results. It doesn't work at all with stock manifoilds or factory EMS. There was a race team that used to autocross SpitFires with an aux bridge and working lower stock manifold 6 ports with a Racing Beat upper and Weber carb and full exhaust. They had great low and high end power (granted was a super light car too). They dyno'ed over 200 at the wheels (which can be done with a well tuned street port too). It typically wont work unless you really know what your doing both in porting and tunning the whole system. 90% FAIL at it.

~Mike.........

RacerXtreme7

iTrader: (2)

Just so you know...... although they were successfull in having more power ever where over a stock engine (except maybe 2000 and below), a well street ported 4 port turbo engine will out perform it still, and a half or full bridge port 4 port will out perform it even more. In other words, it's a huge waste of time, energy and money..... unless you like to be different, but don't expect it to actualy work.

~Mike............

RacerXtreme7

iTrader: (2)

Come to think of it, it might have been a Sprite, or maybe it was a Spitfire..... It was done in the late 90's.

jjcobm

iTrader: (18)

Yes... Many threads, just one of them:

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/removing-6-port-auxillary-sleeve-inserts-913835/

TyFc3s

i might be able to do this for a very cheap price (perhaps free) and i am curious and like to be difrent i probaly woulnt do it but if i did theres no way it could hurt me can it

SirCygnus

iTrader: (1)

what part of "dont do it" dont you understand?

RacerXtreme7

iTrader: (2)

Ya, ta' hell with reading others experiances, it'll work!

Did you miss the "all the downsides of a bridge port (poor idle and cruise) with NONE of the benefits (no power to be gained, perhaps even less power over a well done street port or even stock)"?

~Mike.............

TyFc3s

ok ur right thanks for the feedback