Max bottom end RPM

[psychobandito]

Head is built, so it's fine.

Anyone know the kaboom point of a stock (0 Mile) 9A bottom with ARP hardware?

[giovajetta]

Head is built, so it's fine.

Anyone know the kaboom point of a stock (0 Mile) 9A bottom with ARP hardware?

if you don't have eprom or anything else 6k rpm

[ps2375]

if you don't have eprom or anything else 6k rpm

What does an electrical part have to do with a mechanical assembly's limit?

I would guess somewhere around 7k rpm, as the fasteners are not the real issue, it would be the balance of the assembly and given the not as good geometry of the 9A, I don't know how far you would really want to take it. With a balanced assembly, more is possible and then other things begin to limit rpm, like the head's flow and the cam's power curve.

[oldskoolracer]

Start it up, put it in neutral, hold your foot to the floor and find out for all of us. You say 0 miles on the engine, if you havnt properly broke it in, I dont see it lasting more than a couple moments without a catastrophic failure

[Rocco R16V]

if you don't have eprom or anything else 6k rpm

if you dont know, why would you post up an answer?

9A Stock is 6800 PL is 7200. Built properly with ARP and a basic balance 7500RPM no risk. I set my (aba/16v) rev limiter at 7800RPM.

That is after proper break in of course.

[Prof315]

On a properly built bottom end, the oil pump will be the limiting factor. Above 8500 rpm or so it will start to cavitate and the engine becomes a bomb with the fuse lit.

[psychobandito]

Thank you to the last 2 guys.

the engine will obviously be broken in. It won't be seeing north of 7 on a regular basis, but i know the cams are good to around 8, so once in a blue moon if i hit 7500, i don't want the thing shooting rods through the pan.