Bernd,
What's this mean for those of us with slightly less modified engines
than yours? Are you just stopping a "backwash" effect - Air going the
wrong way in that vacuum line?
"Bernd D. Ratsch" wrote:
>
> Hehehehe...
>
> First off, thank you to Bruce Bridges for listening to my theory and giving
> me some other suggestions to try!!
>
> Now, here's the scoop:
>
> I was experiencing (with the 9# pulley) some erratic part-throttle (under
> 3+psi of boost) surging. When I decided to hook up my scanner and drive it
> around (with a buddy to watch the MAP readings) I found that the MAP, under
> boost, was registering 30+"hg. NOT GOOD!!
>
> Soooo...going from some old experiences with Fords, I decided to install a
> one-way check valve on the vacuum line from the TB to the MAP sensor. (This
> device is found on most 76-88 Fords on the Distributor...be careful though,
> some are metered and others are just open and shut.) Now, under boost, the
> MAP shows 0" instead of 30+" and the part throttle/boost problem is gone.
> So much for reprogramming the computer...$600 vs. $1.99. ;)
>
> Here's the P/N: Borg-Warner - #EC601 Check Valve (You'll need some vacuum
> hose to extend the line from the TB to the MAP.) I'm also working on a MAP
> relocation bracket but don't know where I want to put it yet...but I need to
> keep it as close to the TB as possible.
>
> Further drivability testing is required so don't go out to your local
> PepBoys just because I wrote this. I'll have better results in about a
> week. (And NO...I didn't reset the computer...I didn't want to.)
>
> - Bernd
-- -andyhttp://home.twcny.rr.com/andylevy/ --- andylevy@bigfoot.com ------------------------------------------------------------- modesty, n.: Being comfortable that others will discover your greatness -------------------------------------------------------------
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:57:09 EDT