Thanks, on the fence…236@050 & a 2500 Stall?That’ll be a goodun (as RRR would say)
Probably too much cam if you don’t have above 9-1/2:1 comp for a street driver.I’m on that side of the fence myself. To much cam IMO. I’m also NIT use to automatic transmissions. I’ve been hanging gear my whole life on the muscle rides.
To actually smooth down the ports and polish is a power looser. Don’t do it.
It will increase flow but the fuel slides down the wall, not flow into the cylinders as expected. It’s an old timer trick that showed cfm on the bench but not power on the engine as expected.Really? I didn’t know that, thanks for letting me know, I’ll happily step away from the Dremel. I was told by an old timer to polish the ports for better flow… you just saved me several hours of work!
That's great information. I 've been told that the stock Magnum cams are very whimpy, but wasn't sure when I would have to start worrying about upgrading keepers and retainers with my choice of new cam. Its nice to know that I'll be able to use stock components (aside from valve springs).[/QUOTE
Check out Hughes retainers if you run that cam. They are designer to provide extra clearance between the retainer and the valve guide. I didnt know about them until i had finished my magnim. My lift is 512 and I only have Less than 20 thousandths clearance between the retainer and valve guide. Also check out the 1110 ?? Valve Springs that are Good for 550 lift. Also check your piston to valve clearance with modeling clay. I believe that 80-100 thousandths is the " General rule." Dont clean the pistons mechanically or with strong chemicals. There is a friction reducing coating on the skirts.It will increase flow but the fuel slides down the wall, not flow into the cylinders as expected. It’s an old timer trick that showed cfm on the bench but not power on the engine as expected.
Better off doing a bowl porting and a race prepped valve job. This will effect flow in the lift range of the valve lift with the cam you have. (Or getting.)
Nothing out of the ordinary in my experience with magnums. Those look better than some I’ve seen.Just a quick update to show rod bearing wear, I can’t catch anything with my fingernail, but it looks like it’s a good time for fresh bearings.
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Glad you looked at em. You can do them yourself if you like a challenge. Once you do 4 or 5 sets of cam bearings they are simple. The first time you do it, it’s a bit nerve racking. But like anything else it’s a good skill to have. Don’t even attempt it without the right tool.Well… looks like I can put cam bearings on the list of to do’s! Is it something I can do at home, or should I take it to a machine shop for the replacement? If I can I’d like to do it myself.
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