[s-cars] "Negative Boost", Oh yes Martha its that dreaded subject once again

Robert Myers bob at chips-ur-s.com
Mon Oct 4 19:02:57 PDT 2010

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That just sucks.  ;-)


At 09:30 PM 10/4/2010, Hap Maguire wrote:
>*This message was transferred with a trial version of CommuniGate(r) Pro*
>A sporadic boost issue has been driving Tufty Jones, Brendan Rudak 
>and yours truly very crazy for the last several months. Last week 
>Brendan and I set about logging runs on da computer to see if there 
>was a software issue and everything checked out perfectly. We even 
>tried swapping out the Tial 44mm wastegate for a plug and play 
>Turbosmart WG with a minor change invloving a slightly laggier but 
>still inconsistent boost between 10-15 lbs due to a 7 lb vs 1 bar 
>spring in the Turbosmart WG. Tufty and I finally decided to do an 
>intake tract leak check even though we knew it couldn't be that as 
>this car has basically a full hard pipe tract with the only silicon 
>pieces at the joints for engine flex. This would also eliminate the 
>BOV as a potential source. Well as the pressure built upwards of 30 
>lbs the only leak we found was from the test valve. The intake was 
>solid. To do the test though, we had to remove the 4" elbow that 
>runs from the air cleaner to the turbo inlet. As Tufty was 
>scratching his head yet again he took a good look at the cleaner and 
>Voila, we had found our "Negative Boostie".
>As you can see from this inside view, the plastic frame has broken 
>down. This allowed the cleaner to shrink in on itself as Da BEEG 
>Comp turbo literally sucked the life from its veins. You can also 
>see the crease lines on the outside of the cleaner and visualize 
>what was going on.
>This air cleaner was mounted to a 4" aluminum pipe that had a 90 
>degree bend and the cleaner just hung from the pipe without touching 
>anything else. You can just see the pipe here in this shot.
>Well mucho thanks to Tufty and Brendan for their continuing help in 
>perfecting this beast. Something tells me this is gonna be a long 
>story. Throughout this all, the car still ran beautifully if 
>somewhat muffled because of the cleaner. I gotta see if I can get a 
>refund or do you think AEM will just laugh???
>Hap, wit dakine "Negative Boost" nomoh not(and yes Mr Baloney that's 
>3 negatives) from Evahboost, Maguire
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