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What is safe RPM to take 426 crate engines too. cast iron heads solid flat tappet cam stock rockers
I've been shifting at 6200 so I wanted some opinions on rpmStaying safe, no more than 6k maybe 6500
It will pull more just didn't know if it was too high and unsafewhen it stops pullin no need to rev it past it's peak power .
It will pull more just didn't know if it was too high and unsafe
That's what I'm saying ha-ha don't need to be hurting it don't plan on shifting at 6200 everyday just if I take it out to the track on a Friday in a great whileit's an expensive engine no need to hurt it 6500 would be my high point .
It will pull more just didn't know if it was too high and unsafe
A little of it depends on ur gearing. I shifted my s/s type engines at 6200 too. Lasted 14 yrs, w/ a few minor problems. Was sold completely worn out.I've been shifting at 6200 so I wanted some opinions on rpm
How can you give a max safe RPM with no pertinent information? Who's crate engine? What solid flat tappet cam? What valves and valve springs? What engine internals? No dyno sheet? Let's all just keep guessing! After all, it isn't your engine!
X3!How can you give a max safe RPM with no pertinent information? Who's crate engine? What solid flat tappet cam? What valves and valve springs? What engine internals? No dyno sheet? Let's all just keep guessing! After all, it isn't your engine!
It's a Mopar 426 crate engine. Cast heads stainless valves 2.25 intake 1.94 exhaust . stock rockers it's a 9.1 motor Mopar dual plane intake forged crank and rods as well as pistons has a ray Barton solid lifter flat tappet cam that ray had bullet racing cams grindHow can you give a max safe RPM with no pertinent information? Who's crate engine? What solid flat tappet cam? What valves and valve springs? What engine internals? No dyno sheet? Let's all just keep guessing! After all, it isn't your engine!
It's a Mopar 426 crate engine. Cast heads stainless valves 2.25 intake 1.94 exhaust . stock rockers it's a 9.1 motor Mopar dual plane intake forged crank and rods as well as pistons has a ray Barton solid lifter flat tappet cam that ray had bullet racing cams grind
What is safe RPM to take 426 crate engines too. cast iron heads solid flat tappet cam stock rockers
That's why it has a different cam in it the hydraulic lifters wouldn't hold oil pressure so I changed cam and lifters and the cam bearings looked scary so ended up changing them toThe problem is that Mopar Performance had severe quality control issues with those crate engines. The last one I worked on was eating itself up internally even though it was brand new. The bore clearance was wrong, the pushrods were rubbing on the head gaskets, the ring gap wasn't set properly, etc.
If your engine is running good and there is no trash in the oil, lash is holding steady, plugs look clean, leak down is fine, compression is fine, etc. then let it eat. But personally I wouldn't trust one of those engines unless I had pulled it down and gone over it myself. The ones I've seen all had major internal problems.
I've heard allot of bad about them so I was just asking what everyone's opinion was on safe rpmThe problem is that Mopar Performance had severe quality control issues with those crate engines. The last one I worked on was eating itself up internally even though it was brand new. The bore clearance was wrong, the pushrods were rubbing on the head gaskets, the ring gap wasn't set properly, etc.
If your engine is running good and there is no trash in the oil, lash is holding steady, plugs look clean, leak down is fine, compression is fine, etc. then let it eat. But personally I wouldn't trust one of those engines unless I had pulled it down and gone over it myself. The ones I've seen all had major internal problems.
-I had that combo or close at one time on two diff street hemi engines, 6000 on both.It's a Mopar 426 crate engine. Cast heads stainless valves 2.25 intake 1.94 exhaust . stock rockers it's a 9.1 motor Mopar dual plane intake forged crank and rods as well as pistons has a ray Barton solid lifter flat tappet cam that ray had bullet racing cams grind
^^^^^^^^Yep, as the 'mopar misfit' says, I see no reason to wind this past 6,000 rpm.