rpm

bud light · 12-12-2010, 09:48 PM

What do you think the safe RPMs should be for a st 350 work horse

fastfred · 12-13-2010, 11:39 PM

If it's in good shape 5000 rpm won't hurt it a bit. That is a good safe limit for the stock valve springs.
Of course you have to have a good ignition to do that. The limiter in the stock ign module is at about 4500 rpm.
The engine will usually go into valve float at about 5500-6000 rpm with stock springs and the valve keepers sometimes fall out! Ask me how I know.

I do sell a kit with Stainless valves (intake and exhaust), and better springs that will let you rev to beyond 6000 safely.

Fred

bud light · 12-14-2010, 06:38 PM

Thanks good info.

12-12-2010, 09:48 PM	#1
bud light Gone Wild Join Date: Oct 2010 Location: Lawrenceburg Ky. Posts: 1,771	rpm What do you think the safe RPMs should be for a st 350 work horse

12-13-2010, 11:39 PM	#2
fastfred Gone but not forgotten Join Date: Jun 2008 Location: Lake Havasu City, AZ Posts: 42	Re: rpm If it's in good shape 5000 rpm won't hurt it a bit. That is a good safe limit for the stock valve springs. Of course you have to have a good ignition to do that. The limiter in the stock ign module is at about 4500 rpm. The engine will usually go into valve float at about 5500-6000 rpm with stock springs and the valve keepers sometimes fall out! Ask me how I know. I do sell a kit with Stainless valves (intake and exhaust), and better springs that will let you rev to beyond 6000 safely. Fred

12-14-2010, 06:38 PM	#3
bud light Gone Wild Join Date: Oct 2010 Location: Lawrenceburg Ky. Posts: 1,771	Re: rpm Thanks good info.

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