I put the 426 big bore kit in my EX and a stage 1 Hotcam. And i tapped out the studs in the motor and made the bolts bigger b/c it kept blowing head gaskets. I have put prolly 3-5hours on the motor since then. I was using 93 octane gas and then i filled it up with 87 gas. Now every time i gun the throttle it makes a ticking sound in the motor. Is this b/c of the gas or something else?

 

detnation. What compression is it? You should use 93 or higher for sure

 

it is either 12:1 or 11:1.

 

The STOCK engine requires 92 octane!

 

You should use 100 oct or higher.

 

Thanks alot guys

 

cant use octaine booster to bump it up either.