how high rpms on 360

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gotdust57@yahoo

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i have a 73 duster with rebuilt 360, mild cam, edlebrock intake, and 4 barrel carb, petronix ingiter 2 with flame thrower coil, hooker headers,904 auto trans, and 8.75 trans, just trying to list all info for help with this. when running through gears how high can i take the rpms on tach before i run into danger of hurting engine? thanks
 
I have run a stock 360 short block to 7500, that's what MP told me it was good to. I've since put Milodon rod bolts in it and balanced the piston and rod assemblies, not the crank, and I regularly rev it to 7200 - 7500.

Your engine is of course going to depend on head flow, camshaft design and valve springs.
 
i agre with the above. depending on your carb intake and cam , you may be able to rev to 6000 but really not be making power that high. stock 2 piece valves dont last forever at that kind of rpm either. if you do it daily , plan for a failure. if you only do it once in a while it shuld hold up a while. if you want to run serious rpm you nead good balance, and good one piece valves. Ive never had a bottom end failure in a sb mopar that was oiling properly, but ive broken plenty of valves.
 
I run my truck 5.9 up to no more then 4500 actually, has enough torque to light em up then I gotta pedal it so it doesnt redline, keep it between 4000- 4750. Makes for one hell of a smoke show.
 
My 360 was built with lighter than stock rods and pistons and was balanced. The rest of the build allows it to run right up to my self imposed 6500 rpm redline. The engine is still pulling hard and will willingly rev past that point but I see no need to.
 
How hi you can rev it and how hi of a rev is safe and how hi you in the rev you make power are 3 different things.

The cam dictates the power range, actual power may not top out in the cams listed rpm range.

Valve springs control the valves which are the first thing to not work up to potentail. If the valve spring can not keep the valves opening and closeing right, power falls off. This is called valve float.

Actual rpm has a limit in one other area. Oil surply. The stock pump in a stock engine has it's limitations that oil can only be pumpeded so fast. It is safe to keep it to 6000 rpm with a short burst to 6500 as pushing it. This should also apply to modified engines with HP pumps.

It is a safe bet that your engine is making peak HP by 6000 rpm.
 
If youre a lead foot and really worried get a msd box with a soft touch rev limiter and set it at 6500 rpm It could save a motor if you miss a shift. This is especially important in solid lifter cars as you have no lifter float to limit rpm.
 
Very true. A rev control ignition is a good idea.
The solid cams limitation is the valve spring.
 
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