how difficult is it to gain 9:1 compression in a 305 tbi?..
looking to install a ***** thumpr cam from comp cams.

 

That's about what you have now. (assuming untouched stock)

CR is far from the biggest of your problems with trying to run a cam like that. Better hope your mad tuning skillz are up to the task.

 

Already 8.8:1, close enough, BUT that is guaranteed the most wrong cam for your car. On my soul I swear you will hate it. You can't have the sound until you invest in ALL the necessary supporting mods. Want a cam you might hear, that your LO3 can tolerate? Try this: http://www.competitionproducts.com/E...uctinfo/E1136/ You can make any cam sound meaner with headers and the right muffler.

 

thanks! good to know, but what do you mean by mad tuning skills? is it hard to find a agreement point between the carb and cam?

 

Carb, not so much; TBI, another matter altogether; 305, .... yeah.

See the post on the Chevy Truck boards about "doesn't run anywhere near as good as it sounds".

 

thanks guys! been a big help, also i checked out that elgin cam, looks nice and a bit cheaper than the comp cam too!