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115 Posts
I decided to start a new thread as my issue doesn't seem to pertain to the bypass.
Background:
I live in Denver 5,200 feet above sea level
2005 Elise
10,xxx miles
BWR SC 1,500 miles on the install
Problem:
Max boost @ 8,200rpm ~5 (I've previously seen 7psi)
Here's what I've done so far:
Replaced the Supercharger belt / and tried a shorter belt
Replaced Belt Tensioner
Compression test 175 across all cylinders (loss at 5000 feet of altitude= .8617)
Removed SC to inspect bypass valve / the valve operates and seals properly
Upon removal found transmission mount bolt had sheared. Replaced transmission mounting bolt with grade 8 bolt
Replaced intake manifold gasket
Swapped ECU with CharlieX tuned ECU
Conclusion:
I've run out of ideas as to what it may be...
The car achieves 5 psi easily, be tween 4500 and 5000rpm. At cam changeover it drops and then creeps back to right around 5 psi.
One passenger did mention while driving with me that during one run I let the car bounce off the limiter and they said they said they saw 6.5-7psi briefly. I can't understand why the pressure would increase on the limiter but it may have?
I'm grabbing at straws at this point.
The car is mostly used at the track, perhaps a hard downshift may have "stretched" a valve??? (Wouldn't the compression test have shown it)
Maybe I have a really dirty air filter or some kind of blockage in the air box (maybe I should try a run with the airbox removed).
What am I missing?
Background:
I live in Denver 5,200 feet above sea level
2005 Elise
10,xxx miles
BWR SC 1,500 miles on the install
Problem:
Max boost @ 8,200rpm ~5 (I've previously seen 7psi)
Here's what I've done so far:
Replaced the Supercharger belt / and tried a shorter belt
Replaced Belt Tensioner
Compression test 175 across all cylinders (loss at 5000 feet of altitude= .8617)
Removed SC to inspect bypass valve / the valve operates and seals properly
Upon removal found transmission mount bolt had sheared. Replaced transmission mounting bolt with grade 8 bolt
Replaced intake manifold gasket
Swapped ECU with CharlieX tuned ECU
Conclusion:
I've run out of ideas as to what it may be...
The car achieves 5 psi easily, be tween 4500 and 5000rpm. At cam changeover it drops and then creeps back to right around 5 psi.
One passenger did mention while driving with me that during one run I let the car bounce off the limiter and they said they said they saw 6.5-7psi briefly. I can't understand why the pressure would increase on the limiter but it may have?
I'm grabbing at straws at this point.
The car is mostly used at the track, perhaps a hard downshift may have "stretched" a valve??? (Wouldn't the compression test have shown it)
Maybe I have a really dirty air filter or some kind of blockage in the air box (maybe I should try a run with the airbox removed).
What am I missing?