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Trawling through the search facility alot of people seem to be running the J valve with a chipped car with no problems.
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I believe so too...just remember that it's not a free mod. There are some downsides...
But as long as people know this, use decent pertol and watch out for limp mode...or understand the fact that if it's stinking hot they will 'enjoy' the ECU potentially cutting the timing back, there should be no issues.
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Think I'm going to do this mod but don't want to be kicking myself in a few months time when Iv'e got problems with the motor!
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I don't think you'll have problems...if you hit limp mode, remove it.
If the inlet charge gets too hot, the ECU will protect the engine.
Just be aware of what you are doing...and you'll be fine.
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Iv'e got a boost gauge fitted now and in the low gears I'm spiking at about 16-17psi. In 4th and 5th it goes to about 19 or 20psi sometimes, I suppose I could keep a eye on things this way?
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A good idea...but you need a wide band lambda or a run on a RR logging a/f ratio with a wide band lambda to ensure you're not running rich.
I wouldn't go doing any flat out top-speed runs without first verifying that you aren't running lean with an alternative N75 fitted...but that's just me.
You pays your money, and makes your choice.