525 EFI valve spring change

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09-07-2012 | 08:53 AM

#11

PARADOX

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Joined: Dec 2005

Posts: 2,798

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From: Florida

On the 525's valves are a bigger issue then the springs. But. call Tom at Champion Racing Heads near Daytona. 386 446-4488. He just worked on my 525 heads and very reasonable. They will check the springs for specs and won't sell you stuff you don't nee. Tell him Peter sent you.

09-07-2012 | 09:09 AM

#12

bonesmalon

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Joined: Sep 2009

Posts: 534

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From: Clarence, NY

Quote:

Originally Posted by teamsynergy

According to Merc... the 525EFI doesn't need to be freshened till north of 450-500 hours... its the 500EFI that needs it north of 300 hours.

However, the P/N is PAC-TVS1631 for the 525EFI. You can also use Crane 99896 spring set @ 132# @ 1.906 seat and 414# open.

I'm getting the impression thanks to many of you that the 300 hr target is in fact the 500 and it's looking like "it ain't broke...."
Thanks for the many inputs! I'm gassed up and going