240 valve spring

Red Rocket

New User
Need help on vave spring pressure on a stock 240 head. I,m installing a 240 head on a brand new reworked 123 ci block. The stock 113 head spring pressure is 30 or 43 from two manuals. I would like to know the stock spring pressure on the 240 head. I need stronger springs as I will be spinning it to 3k rpms. What after market springs or stock IH springs are available. Maybe stock 240-340 springs will be ok.
 
Stock 340 springs are 80# if I remember right!
I Run my Pullers with 340 heads up to 3000 RPMs without any Problem!

What are you Puttin it in ?

A Puller I Hope?
 
123CI engines come with Valve rotators(Rotocaps)on the exhaust side in some cases and you run the chance of popping the ends right off running them above Max rpm's(2100),get your wallet out...
 
(quoted from post at 17:12:26 12/22/09) Stock 340 springs are 80# if I remember right!
I Run my Pullers with 340 heads up to 3000 RPMs without any Problem!

What are you Puttin it in ?

A Puller I Hope?

We dont install the rotocaps the engine is for a '47 BN in a 2500lb class. We also pull it sometimes in the long chain/short chain stone boat pulls and the occasional transfer sleds. Just having fun with it.
 

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