Contour Enthusiasts Group Archives Forums Modifications Forced Induction Boost/Vaccuum Numbers for S/C Owners?

I just wanted to see if I'm in sync with everyone else that has an S/C.

After the car warms up to normal operating temp, I get 19 in/Hg vaccuum at idle (800RPM)
Wide open throttle under 4,000 RPM I get between 10in/Hg vaccuum and 0.
After 4,000 RPM wide open throttle I get between 1 and 8psi pressure (8 kicks in around 5,000).
When I close the throttle, and the RPM's are high, I get 20in/Hg vaccuum.

Alright: your turn.

I'm around 18-19 at idle. It goes to 0 if I floor it below 2500 rpm, then about 2500-3000 rpm, it starts building boost gradually until about 8-9 psi at 7500rpm.

22-25" of vacuum at idle
10-12" of vacuum at 70mph (cruise, not in boost)
At WOT it initially is at 0psi and climbs from about 2500rpms up to approx 9psi @ 7500rpms.

-Mark

Don't remember the vaccum reading with the S/C on, but with the stock motor it's about 8-9 at idle and the boost on the 3L S/C was running 9PSI at 6000 RPM's of course then the motor had meltdown, but hey that's when the fun starts!

Rick

What pulley were you on Rick? 3.125 or 2.87?

3.125. never had a chance to put the smallest pulley on.

Rick

Sweet Then I'll know I'm making the max boost before redline which is what I wanted

Hey guys I notice all you have 7,500 RPM for redline. They burnt mine to redline at 6,900 so I only max boost at 8 #'s. Who do I talk to in getting my chit reburnt? Thanks.

Originally posted by PhatSVT:

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Hey guys I notice all you have 7,500 RPM for redline. They burnt mine to redline at 6,900 so I only max boost at 8 #'s. Who do I talk to in getting my chit reburnt? Thanks.

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Sorry Sam I had Vortech send me a blank superchip and I had fordchips.com burn me a custom chip to work with the 3L. Also they have a badazz trick with the IAT to put it after the SC and it makes our PCM dynamic and it will add or subtract timing depending on "boosted" temps. Very cool and more safe.

The chip I got from them had it already, I didn't have to specify what I wanted the redline to be.

About this IAT relocation, it doesn't require any changes to the programming, does it?

I might try it. Only problem I see is getting the sensor to seal and not bleed of boost.

Just put my smaller pulley on and like the small increase it gave me. Still craving more though