Boost problems - I should be getting more
Hey Guys,
I connected with the manager of a local air strip. After I signed a waiver, I was given the gate code and access to the runway :-)
I've seen 2 planes land on this strip in 9 years - so pretty safe.
A local/rural helicopter will land and take off from time to time for medical transports.
Pretty sweet.
Anyway, long story short, with the car running nicely I got in about 5 WOT runs up to about 105 mph, then had to begin slowing as the strip end was approaching.
BUT, my boost, per the pod gauge, never got over 5 psi.
For these WOT runs I turned off the overdrive and started in 1st gear. I shifted into second at about 5.5Krpm and into drive at about 5.5Krpm
On the last run I removed the air filter (very clear sky no wind) and got the very same result.
In both 1st and 2nd belt squealing could be heard above ~ 3500 rpm.
After the runs, the smell of burning rubber could be detected; not overwhelming, but definite.
With the set up I have, I think that over 5 psi boost should be easily achieved,
The system uses a Vortech Mondo bypass valve which vents ** and there is no rerouting of air back into the supercharger **. I can hear it vent when the throttle closes at high rpm.
I recently put a Motorcraft OEM tensioner on the car, which did stop belt slip when the AC was operated.
So, where is the boost???? I'm not sure a slipping belt accounts for this? (Blazen has prev suggested a different belt, and that is definitely on the list)
Any inputs as to how to get the boost back would be appreciated.
Thanks
Last edited by azgolfrat; 09-08-2022 at 06:39 PM.
Reason: correct description error **
'03 Silver Birch. Stock rebuilt 4.L 32V DOHC, V7-JT blower w/ADTR racing supercharger kit, Shift kit in transmission, stainless works long pipes and cat backs, Ridetech coil-overs front, shocks in back (ADTR kit). Rebuilt calipers, upgraded front rotors, OEM Mercury wheels, [boost, oil P, WB fuel/air, and fuel pressure] gauges. Build duration was Dec 2019 to Mar 2022. 8 rib serp belt upgrade i/p.