Max RPM's

[Hopdaddie]

I have a stock 454 with a 12c Berkeley pump.
In the water I am only getting a max RMP around 3g.
With the stock pump would probably have a A type impeller. I have read this limits RPM's.
Is 3grand some thing I should expect with this setup?
Thanks

[460 jus getn it]

I have a stock 454 with a 12c Berkeley pump.
In the water I am only getting a max RMP around 3g.
With the stock pump would probably have a A type impeller. I have read this limits RPM's.
Is 3grand some thing I should expect with this setup?
Thanks3k sounds rather low. Im thinking with a stock 454 and an A impeller that 4300-4800.
You might want to check and see if anything is in the pump.

[dumbandyoung]

460 Is right that is low. When my 454 was stock I saw around 4600.

[bahner454]

my 454 turns 4900-5000 (A) impeller with cam and headers. Stock you should see around 4500 or so.

[bahner454]

Are you sure your Tach is reaing correct? 3K RPM's sounds really low.

[Hopdaddie]

Thats what I'm thinking. The Tach is off the boat scoots along pretty good...

[Some Kind Of Monster]

Get a new tach ;) A good running motor (even stock) will push an A way past 3 grand. Your tach may just need to be set to your motor. Look at the back and see if it is set wrong.

[SmokinLowriderSS]

Yep, check the tach. my 454 when stock spun a Berk A 4850 on a marginally-fed Berk F pump. Properly fed, about 4600.