Effects of running hugely rich AFR for short period.

[~SlideWays~]

Apart from carbon build up on the spark plugs, are there other damaging effects?

I've just fitted a very low k's 4agze 8.9:1 long block, along with changing to much bigger injectors (510cc vs old 365's) and a walbro 500hp fuel pump so it is running very rich. I've only driven it for a short distance for testing and its mega smokey. The problem is that the smoke looks blue, not black which is what I'd expect from a rich mixture.

Compression test is an even 170psi on all four (gauge reads a bit lower than others I've used) and the turbo is brand new so would have been burning off the lubrication oil. But the blue smoke can't be just from that little bit of oil.

I know the ign timing is not right. This is being sorted soon.

It smokes when reving in neutral as well as under load. To me it sounds like the rings but the guy I bought the long block off is adament that it never smoked.

Could running very rich have glazed the cylinder walls or something? Would the compression test still come out fine though?

[strx7]

it removes the oil off the bores and you start getting bore-wash.

[~SlideWays~]

it removes the oil off the bores and you start getting bore-wash.

Over short period or long term? Because I intend on getting it dyno tuned again for this new setup asap...as long as the rings are ok that is!

[strx7]

any running with it overally rich will start to have that effect, how soon that effect starts wearing the bores. anyones guess