Re: mystery valve=decel valve

["linus d. toy" <linust@interramp.com>]

At 09:52 PM 1/5/96 -0500, PDQSHIP@aol.com wrote:

>Well somewhat true, the decel valve will bypass the suction of the flap to
>turbo inlet pipe, and equalizes the vacuum to atmoshpere in the air box. This
>valve is triggered electronically by the idle switch function.......  Me, I
>would leave it, after mucho debate with Ned and others, cuz what you avoid is
>a surge rich fuel on snap throttle shut, on the 86-early 88 cars.....   As of
>late 88 a bleed from the wastegate freq valve to a throttle shut delay makes
>the valve redundant........  I debated the point for a while and concluded
>that on a CIS car that is far from smart, this is a GOOD function, you could
>get some serious engine farts with rich fuel, not a good thing.......  But
>then that's what could make the German versions so much faster.....   

I think emissions control has something to do with all this, too.  Don't
recall all the details, but carb'd cars in the early era of emission
controls used dashpots (little oil-filled thingies) to keep throttles from
snapping shut--caused some kind of emission spike that wouldn't pass EPA or
whoever.  That popping/backfire noise in the exhaust would tell me there is
unburned fuel leaving the cylinder--also can't be great for the fuel mileage
(oh..that's right--we're talking Performance here)
------------------------------------------------------
* linus toy             email:  linust@interramp.com *
* seattle, wa                                        *
* wheels:  '91 200q 20v :) '89 Accord SEi (hers)     *
------------------------------------------------------