need some help

[Ryan]

Hi guy's

I'm rebuilding my '78 vette's L-48 and I need some answers while I proceed.
Do all the stock small block 350 ci have an internally balanced crank?
If so do I need the internally balanced harmonic damper?

Last question;
My new timing gear has three positions and has a + and a - Is this for the advance settings? Or should I use the neutral position?


Thanks,

Ryan

 

[cruzer99]

Yes.... Small Block 350's are internally balanced. Check the manual for the timing gear.

 

[69_coupe]

Yes all the engines have internally balanced cranks, and NO you can not remove the harmonic damper. If you have a manual gearbox it will propably work without the dampner, if you rebalance your crank. If you have an auto trans, your crank will crack.

Your timing gear has three positions + (advanced), zero, and - (retarded). In general the advanced position will give more top end power, retarded position more low end torque, compared to zero position which is the factory setting.

Anyway if your engine is a stock L-48, it is space enought for the valves to do some experiments. However if you have increased your comp ratio, or useing a high lift cam, be careful, it is always a chance that the valves hit the pistons.

Vidar

 

[Scooter76]

You've got it reversed. Advancing the cam will give more low end, & retarding the cam will give more top end.

 

[69_coupe]

:BOW Sorry for the late reply.
Scooter76 you are of course absolutely right about that.
Advance will give more low to mid-range torque, and you will at the same time lose top-end power. The factor that influence most is the intake closing point , which has influence on the compression pressure. Earlier closing gives more pressure, and hence more torque.