408stroker
408stroker
i got a 408 with ross pistons #99789 on a 6.123 rod with 4 in stroke and edelbrock heads any one also have this and what cam you using kinda worried about valve clearence
There is a thing called lag time and unless you are going roller more lift beyond the heads flow is not a bad thing.
See when a flat tappet cam hits it's max lift it immediately closes again unlike a roller that slams the valve open and holds it open way longer allowing the port to flow what ever it can but longer [more cylinder filling] which is the idea with putting more flat tappet lift then the heads will flow.
Reason is... flat tappet cams spend way more time opening then they do at max lift. So if the heads stall at .450 [typical factory sb heads] then raise the lift to .500 or so. However [there is a point when too much lift will no
longer help, or at least to your benefit/application.]
This should help with your decision.
I agree but you can run a smaller cam with more duration and make more power like a stock eliminator engine.
I agree with ya here, except, the tendency to go with that thinking will often have alot of people getting a very large cam instead of the right one on that thinking or like BJR said, a smaller one that doesn't take max advantage of the head but will still make power if not more.
Of course, everything is combo dependent and depedent on what your doing with the car/engine. Also, how hard your tryin to hit it.
Only if your running stock eliminator.
Which they would run different if they had the option right?
This needs stay on corse for a 408 strt/strp.
Stock eliminator cams are not for driving they are for racing and most have been proven on a dyno that while they maintain a solid flat hp/tq curve they do not produce as broad a band and as much total power as a higher lift cam that also has better manners due to a lot less duration&cl
I call stk eliminator cams 'light switch cams'
But now thats general too. You can if your smart trick your way around things.
Not really into arguing this, it is what it is for it's app.
Duration is a different story ,and while very important, with different rocker ratios, rollers, fast ramp speeds can be overcome.
Then there's center line...........
A cam can make or break any motors potential.
I didn't say to run a stock eliminator cam I said to run a cam that has more duration on it with less lift, if the engine is going to have a valve to piston clearence problem then move the CL back and run more duration.