One way to truly combat boost creep is adding a second wastegate. Even with a good high quality manifold you will most likely creep with a larger turbo.
I am running a 66mm turbo with a greddy manifold and greddy type r wastegate and it still creeps about 3 psi in the upper rpm.
So I finally got around to testing my car for boost leaks. I had a feeling that I should be making more power and my guess was pretty much bang on.
I found 6 leaks in the entire system from the turbo to the intake. 4 of these were on the intercooler couplers and were rather large. The system...
I agree go with the OEM stuff. Either way unless you are running high lift cams that make the engine interference it is not really an issue if the belt breaks.
Well I still have some fuel to play and with a better tune I am sure to make more. I plan to run 94 with methanol and run 24 psi and see what it can do.
Just got back from the dyno yesterday and I am pretty happy with the results but there is some improvement to be had still i think. Was hoping to break the 500whp mark but I only got to do 3 pulls but with another 1-2 psi that should be easy.
This was done on a stock 1JZ minus bolt ons at 22psi...
I have mine set at 10 Deg BTDC. Also what gap are you running your plugs? Even with an ignition amplifer I had to gap my plugs down to 0.020 in order to run 23-25psi.
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