I have my pulley'* on (2.2 SC and oversized idler) and am getting about 6* knock retard on my scantool. My mods are listed below but drilled 180* t-stat, magnaflow high flow CAT, custom intake with box and "ram air effect" like willwrens except not nearly as nice, and autolite 104'* gapped at .53 i believe. Any suggestions on what I should do next to get rid of the knock retard? Thanks

i think a simple porting and exterior welding of the EM'* can help you with that KR....

Every car responds differently. A 2.3" pulley would probably be fine on yours without any further work. You're not the first 92/93 to get KR with a 2.2". And it'll be worse in warmer weather.

yeah it was like 20* outside so i can only imagine what it will do when it gets warm... any other suggestions

Avoid going wide open.

Consider a 2.3" pulley or remove your exhaust manifolds and have them ported.

The easy thing other then putting on a 2.3" pulley is to try to drop down to a 160* t-stat (not the best for winter) and going to some Autolight 103'* (not the best for winter).
If you do PEM'*, I'd also get a 3" DP and you should have no problem running that 2.2".

While it will prob. be worse in the summer, I don't think that it will be that much worse. You are running winter gas and it you are getting more boost b/c of the weather.

The easy thing other then putting on a 2.3" pulley is to try to drop down to a 160* t-stat (not the best for winter) and going to some Autolight 103'* (not the best for winter).
If you do PEM'*, I'd also get a 3" DP and you should have no problem running that 2.2".

While it will prob. be worse in the summer, I don't think that it will be that much worse. You are running winter gas and it you are getting more boost b/c of the weather.

I'm running a 2.2" pulley on a 95 top end, which equates to a 2.0" on a 93. With a 180 thermostat, and a stock downpipe. So you can see it varies by car. A 160 thermostat will do you no good in town, and not much on the freeway. You need alot of airflow through the radiator to work with a 160, and I don't suggest putting a bandaid on this one.

Start with PEM'* or increase the size of your pulley.