i have a s2 rx7 with a s613b rew tt converted to a hks to4z running a 12a turbo front timing cover running a micro tech lt10s. running stock injectors running 100psi in each rotor. run premix no oil metering valve seems to foul plugs a lot don't know if running to much premix for something else help me diagnosis this problem please

 

What are you premixing at? Compression? Turbo leaking and burning oil?

Edit: nvm, i missed the compression you posted

 

You've got a Frankenstein engine with a single turbo. And through the internet, without pictures or specific information, you want us to help you figure out why it's fouling plugs?
I'm not a tuner, but these things come to mind to consider....

*Tuning maps. A/F's at idle etc
*Injector issues.
*Need for hotter plugs.
*Idle speed
*Plug age.
*Pre-mix amounts

 

welcome to the board.

as a possible factor, premix can be taken off the table pretty easily. what mixture do you run? you can either resolve to run the tank down or drain it. either way, if the plugs burn better with less or without any at all (temporarily, of course), then there's your answer.

however, as SgtBlue mentioned, there can be a number possible issues. and he's absolutely right. personally, i am leaning toward a bad tune though.

 

sorry for the late reply it now sounds like a dead miss at idle

plugs were just replaced
25ml of penrite synthetic premix to 1 liter of fuel
the car idles around 1350rpm
but now that you say it might be a tuning issue i did just get it tuned and did not have this issue before the tune
compression is really good 100psi per rotor but that is still with stock seals
will post pictures of engine bay later tonight etc

thanks both for the reply s appreciate it heaps

 

The forum has a Microtech section you may want to post up and ask more tuning based questions on there.