whats the max lift on a camyou can go on stock heads before running into problems? what specs would i be looking for better 1/4?

 

aftermarket cam on stock heads is a wasye of money

 

should i just keep the e303 i got now and just wait for the bigger cam until i aftermarket heads?

 

always buy heads before the cam

 

There is a practical limit on how much lift you can have with ANY head.
There are limits to how much lift you can run due to ......
1) valve spring stacking.
2) how tall the valve guide is.

 

this is true. and the average lift can vary from motor to motor. u have to check ptv. what size cam u tryin to run?

 

i dont see why you can get all of the power you need from the e303 cam. you can put down quite a bit of power with the stock cam and the RIGHT set up. bigger is not always better. you have to have the right combo