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WPVW supercharged drag bug dyno for Warwick

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hypo-vw Australias 1st 10sec street beetle (Jan 2007) 10.49secs@132m

2,151 posts · joined May 2004 ·

#804737
Well today we managed to get Bens' supercharged drag bug to the dyno for testing and its first tune set-up. We have left the dyno with mixed emotions as the engine sounds strong and healthy , but the supercharger is supplying only 5psi boost .
we really dont know what the issue is as yet , however I have my suspicions that the old Wade supercharger that we are using is buggered. There are quite a few scratches and marks in both the impellors and the housing . This has been caused by debris entering the supercharger when used on the speedway many years ago .
At least Ben will have a strong little engine ( 2442cc 88x94 ) for Warwick this year and should get a few good runs in the 8's .
The dyno session ended with 195bhp @ the wheels with 1072lbs of tractive effort on E85 fuel on 5psi boost .
Tonight has been another working bee on my turbo oval and tomorrow I will dyno the new engine combo .
Team

FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)

Stanley I guess the reward is in the doing of it

4,523 posts · joined Mar 2003 ·

#804741
bummer Wayne

For it to only develop 5psi I would imagine the marks in the impellor and housing would have to be fairly substantial.
Can you up the speed of the blower to maybe pick up some more?

hypo-vw Australias 1st 10sec street beetle (Jan 2007) 10.49secs@132m

2,151 posts · joined May 2004 ·

#804775
Stanley wrote:bummer Wayne

For it to only develop 5psi I would imagine the marks in the impellor and housing would have to be fairly substantial.
Can you up the speed of the blower to maybe pick up some more?
I will look into the boost problems after Warwick . Too busy now preparing my turbo oval , and Ben will still have heaps of fun learning to drive his bug the way it is . Will keep you posted on developments after Warwick
Team

FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)

SuperOwen Fahrvergnugen

868 posts · joined Jan 2009 ·

#804797
Out of curiosity what sort of airflow is the wade blower rated at and what drive ratio are you running? 2442cc might be a bit big for the blower?

hellbugged 48's and straight cuts

5,080 posts · joined Apr 2003 ·

#805231