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Old 09-19-2011, 08:49 AM   #1
Bill Baer
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Default Re: Pinch valve question?

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Speculate all you want.....but put a linear potentiometer on the cylinder and connect it to your racepak......then you will know if it's consistent....
I have Rock and mine isn't (But what I don't understand yet is why?)
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Old 09-19-2011, 11:49 AM   #2
C and W Racing
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Default Re: Pinch valve question?

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I have Rock and mine isn't (But what I don't understand yet is why?)
My guess would be that you have it opening up too slow. I had an issue with mine being inconsistant and spoke to Gary at 1 Stop and he had told me that. He told me how to set it properly because it needs to open back up within a specific amount of time, too slow and it will be enconsistant. Going off of memory (and that leaves a lot to be desired) I think he said it needs to be no slower than 6 tenths of a second. I hope this helps
Chuck
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Old 09-19-2011, 12:06 PM   #3
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Default Re: Pinch valve question?

FWIW, here's five runs of ours. This is rpms coming off the stop with our Biondo stop. Only appreciable difference is the setting of the timer.

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Old 09-20-2011, 03:37 PM   #4
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Default Re: Pinch valve question?

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FWIW, here's five runs of ours. This is rpms coming off the stop with our Biondo stop. Only appreciable difference is the setting of the timer.

I hate to tell you those are shyt.
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Old 09-20-2011, 03:40 PM   #5
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Default Re: Pinch valve question?

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I hate to tell you those are shyt.
Thank you for your thoughtful input.
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Old 09-19-2011, 01:08 PM   #6
Bill Baer
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Default Re: Pinch valve question?

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Originally Posted by C and W Racing View Post
My guess would be that you have it opening up too slow. I had an issue with mine being inconsistant and spoke to Gary at 1 Stop and he had told me that. He told me how to set it properly because it needs to open back up within a specific amount of time, too slow and it will be enconsistant. Going off of memory (and that leaves a lot to be desired) I think he said it needs to be no slower than 6 tenths of a second. I hope this helps
Chuck
Thanks CW that's the kind of info I am looking for mine is a lot slower than .6 actually it's in the .85-.87 range so per your experience and Gary's advice it sounds like I need to open the air control needle (i.e. pinch) valve to speed up the opening to the .5 to .6 range. I'll give it a try! again thanks.
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Old 09-19-2011, 02:05 PM   #7
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Default Re: Pinch valve question?

sounds like you guys are on the right track.....bump the trace over so the lines are on top of each other...then you can see if it's acting the same.....just keep trying stuff till they lay on top of each other.....I have a pile of stops because of it........

Rock
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