The way I understand it, with a T2, when you free up the exhaust, you also allow the turbo to run more boost and at the same time exceed the stock fuel systems ability to provide sufficient fuel. This can cause the engine to run lean, detonate, and ruin the engine by way of a blown apex seal. Also, the stock ECU will cut fuel to the engine if it senses more than stock boost pressure.



Do I have this about right, guys?



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I have a 3" exhaust system with a high flow cat and two aftermarket mufflers, is this bad? If so, where and how do I go about correcting this (Note: I'm in Canada)? In the mean time, while I still have to drive my 1990 turbo II, what should I avoid?



Spike

What about just a fuel cut controller from mazdatrix? Where is it installed and should I have mazda do it?

Spike

The fuel cut defenser will prevent the factory fuel cut but it won't necessarily prevent the engine from running lean during periods of peak boost. You could install an air/fuel ratio gauge and see if the ratio goes lean at full boost.



I don't know if Mazda would install a performance mod that might shorten your engine's life, but I'm sure there are some shops that would do it.



I don't think there's much to it. Mazdatrix surely provides instructions. You could do it yourself.

So what items do I need?

FCD takes approx 5.4 seconds to install. it just plugs into the boost sensor on your passenger side strut tower

So what do I need:

ECU: Just the FCD? Or more?

Or do I also need upgraded fuel pump?

Or a Boost controller?

What about oil jets?

Other?



Keep in mind that I'm currently happy with my performance, but don't want to blow my engine.





Any suggestions, hints or explanations?



Spike

i would buy an upgraded fuel pump . walbro is pretty good

Vosko



When the car runs lean, does that mean I'm not getting enough oil? How does the fuel pump fit in? Just asking, not trying to be rude?



If I don't want the increased boost, whats the easiest way to control this?



Spike

Note: thanks for answering my endless steam of questions...

If I start running lean, shouldn't I get a warning light on my dash?

If I check the boost at the intercooler and it reads 8.25psi, would that mean the cars is still safe?



Sorry but I'm new to rotary engines.....



Spike