Anyone know offhand what the CR of the motor is? Also, what's different b/t the 2bbl and 4bbl motors? Anything other than the intake and cam?
The 70 GS 350 motor would have been 10.25. That's the 315hp motor. The base Skylarks with the 350-2 was 9:1. The non-GS 350-4 motors were also 9:1, 285hp. Pistons made the CR difference between the motors.
That's cool. I'd rather have 9:1 anyway, I would want to run it on regular unleaded if possible. I would think a cam and intake swap could bring the 2bbl motor up to the non-GS 4bbl specs quite nicely, if both were the same compression.
A lot of people have expressed quite a bit of happyness with the 2bbl to 4bbl conversion, especially if using an aftermarket intake (TA performance intake is what I plan on using)... you'd be surprised how choked these engines really are with the 2bbl
woah yea there is a HUGE diffrence between the 2bbl and 4bbl in power. I also used a stock intake factory cam (with 138k miles on it. it also still only has single exaust. oh my compression is 9:1 and it runs well on cheap regular pump gas The timing is also set to factory. cost me about 120-150 bucks total for the entire change over. Highways are really nice when the secondarys are opening up too. nate
OH yah, I forgot to say... my car runs well on pump gas too, I've got some heat issues to work out (clogged 2 core radiator :error: ) after a lot of highway travel so I run 93 octane plus octane boost (black bottle 104+ works the best for me), which seems to help considerably with the heat related detonation.
