I removed my quadzilla commander and replaced it with a set of autometer phantom gauges last week. The commander never showed more than about 31-32psi of boost. Now, with the mechanical gauge, I can hit 40psi pretty easy with my smarty on revo 7. Is this normal and is it safe? I have the boost line ran into my cfm intake horn. Also, is it normal for the gauge needle to shake and vibrate after it gets above 30psi? Thanks

 

Anybody seen this?

 

I have the same gauge also vibrates after about 30 psi.

 

The needle vibration is normal.. The only time you wont get the needle wabble is if you use a liquid filled gauge..

 

Thanks, is hitting the 40psi normal and safe with my mostly stock truck?

 

Yeah, I was hitting 40 with my edge and no studs... the stock turbo is not very effective around 38ish and up. My edge would only read 32-35 psi, while my gauge was showing 40+.

Might want to save up for some studs. While you have it all apart, take the plunge and get springs and sticks... (I love spending other people's money! )

I think that I have read that our stock head gaskets are good to around 50 with out studs, but that's pushing it. The HG's in our trucks are very good.

hth...