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Tonger Tonger is offline
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Join Date: Sep 2013
Location: Atlanta
Posts: 219
Originally Posted by T77911S View Post
you can check it with the engine off and in the garage.
you are driving blind until you know what the CP is under boost.
here is how to do it.

regulate your air compressor down to about 10psi.
put air pressure into WUR side port and check pressure drop.

post your system pressure, WCP and boost CP.

like brian said, this is almost not possible and when I have an issue like this I back up and try to look at what "I" am doing wrong.

I take it larry modified the head to run WITHOUT a frequency valve or is it still connected?

is your BOV vented to atmosphere or recirculate?

The fuel head is set up without the frequency valve and the bypass valve is set up in a recirculating circuit.

I changed out the wastegate springs to 1.1 bar (16 psi) tonight with the boost connection of the WUR still open to atmosphere. The result was a little better with the car stumbling from being over rich about 1000 rpm later when in 2nd gear. It pulls 3rd gear fine.

I'm going to lean out my warm control pressure a bit to see if that will help a little more. Then I'll hook up the boost enrichment port to my rpm switch and head back to the dyno.

I'll measure where the boost control pressure ends up after adjusting it on the dyno.

Old 08-09-2017, 07:26 PM
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