Cam Choice?

[CarsByCarl]

Originally Posted by fordracer

Two maybe three words, Corvette Z06 and Viper. Both production based and making well over 500 hp. This cannot be done with displacement alone. Corvette, 505hp@6300rpm with a bore x stroke of 4.13 x 4.00. Viper, 600hp@6100rpm with a bore x stroke of 4.06 x 3.96. That's some mighty high hp numbers AND rpm for a 427 and 505 cu/in. without the help of a mighty stout cam



I've done a few flat cam to hyd. roller conversions and an invaluable tool in my box is a pushrod length checker. I trust you do a sweep on the valve stem to check the rocker arm contact area?? If the lifter is too tall, use a shorter pushrod. This is another plus in the roller hat in that a shorter pushrod flexes less.


Please dude, I'm not picking on you personally. If you have been in business for any length of time you KNOW how customers are.

Here's the scenario:

YOU SAY, "Now, mr. customer, be sure to add a bottle of GM Engine Oil Suppliment at every oil change to your 460 and your cam won't flatten a lobe and it will make 500hp forever."

THEY HEAR, " BLAH, BLAH BLAH, BLAH BLAH BLAH BLAH BLAH BLAH BLAH your 460 BLAH BLAH BLAH BLAH BLAH will make 500 hp forever."

I am finished, you have your mind set and I cannot change it. How about this, throw a hyd. roller in one of your engines and see what happens. I'm not talking a radical change, roughly the same duration, lift, lobe center and separation.

We all have different opinions I guess. My opinions are based on actual experience with the 385 series. Building 385 series engines is what I do for a living, and yes I'm familiar with how to set up proper valvetrain geometry. It gets done on every engine that goes out my door.

A Z06 and a Viper are not the same as a 385 series. But I guess you wouldn't know that.....

Originally Posted by fordracer, in the FE vs. 385 thread

I have no experience with either engine, my gut says the FE would walk away from a 385.

The original poster here asked a question and I gave my opinion. It's different than yours. Lets leave it at that.