fattest cam in a 340?
I want to be able to jump a skateboard off these lobes.
First, lets drop the 12 year old school boy routine. Statements like this only point to your immaturity and inexperience, so drop them.
Physical lobe size has zero to do with making an engine lope. It is how the air is ingested into and expelled out of the engine that does that and lobe
design is what accomplishes that.
You can take a stone stock 340 cam, send it out and have it reground to a lesser lift than stock, change the duration and valve events around and have a cam that will sound like a pro stocker.
You've been given great advice so far. In general, cam lift limitations for stock heads is around .500 give or take. This is something that you really need to measure if you are going to push the envelope on stock heads with a large cam. Retainer to guide clearance is critical. If you simply stab a cam in and fire the engine off without checking, the results could be disastrous.
That .500 lift mark is not only because of the retainer to guide clearance. .500 lift or maybe a little more.......perhaps up to .550 is just about all the stock head is capable of flowing due to stock port restrictions, so anything more in cam size will be a waste.
What I would recommend would be the Comp Thumpr cam. The smallest one. You can probably do a blind man stab with that and get lucky and it will sound good. Might not pull a greasy string outta a cat's *** but it'll sound good.
