Looking for old school tips to max out k26-6 and stock waste gate
#1
Quit Smokin'
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I have a dedicated track car that will do double duty for chump car and autocross. We have a set of coil overs and r comps that we have thrown on it for auto-x but anything we do to the car needs to be quickly reversible to go back to stock for chump. Right now I have a Lindsey boost enhancer and max 951 18psi chip in the car. I set the boost to peak around 16psi in high gears, but in second gear at the autocross it would only hit 13 psi. I know the k26-6 doesn't give a nice flat boost curve, but I would like to get more out of it in second gear. Do I just set the LBE in second gear to peak at 17ish lbs and know that a third gear shift is off limits? Third gear really isn't that necessary as it does 68 in second as is. I'm considering shimming the waste gate, but I'm not sure what would happen when I put the stock chips back in... we can shim the waste gate because it's really low point value for chump, but I'm afraid it will over boost with the stock chips and cycling valve on the track. Can I use an electronic boost controller to get a flatter curve out of the stock gate, or is this just a waste of effort? The car feels unbelievably underpowered with the DOT slicks on it. I might not even mess with it but it's actually not outrageously off the pace of the nationally competitive FP cars.
#3
Quit Smokin'
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Hmmmmm... you say that but I wonder if I put a restriction in front of the gate if it would reduce back pressure on the waste gate valve and give a more stable boost curve. Pick an orifice size that would only let the gate bleed down to something like 14 psi when it's wide open. That #6 hot side back pressure is the real enemy.
Anyone kow if there's a spread sheet to calculate waste gate size that I could abuse for this purpose?
Anyone kow if there's a spread sheet to calculate waste gate size that I could abuse for this purpose?
#5
Burning Brakes
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You can shim with stock chips. I had the 26/8, but had shims in my WG and went back to stock chips for some testing with no problems. It should build boost a little quicker, but I wouldn't expect a big change from shims though.
A way out there idea: Would Chump allow any other modifications to the WG? My thought is a while back Blown944 had converted a stock WG to dual port. You could use it as a DP for autoX and SP (just like stock) for Chump.
A way out there idea: Would Chump allow any other modifications to the WG? My thought is a while back Blown944 had converted a stock WG to dual port. You could use it as a DP for autoX and SP (just like stock) for Chump.
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