Offshoreonly.com - HP 500 carb spring recomendations

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sre	07-11-2004 06:56 PM

HP 500 carb spring recomendations

Anyone have the parts numbers for the springs and retainers?

How about installed height and pressure?

Thanks in advance!!!

Lmarth

07-11-2004 07:21 PM

Re: HP 500 carb spring recomendations

Here's what the Mercruiser Service Manual shows for the HP500 valve springs- 150# on the seat with a 1.90 " installed height. 420# open spring pressure. Can't help with the part numbers.--Lou

Infomaniac

07-11-2004 08:44 PM

Re: HP 500 carb spring recomendations

Get Isky 8205 Plus springs. Titanium retainers and new locks from Doug Herbert.

sre	07-12-2004 09:56 AM

Re: HP 500 carb spring recomendations

Thanks for the replies!

I have heard good things on the comp springs as well, any feedback?

rmbuilder

07-12-2004 12:32 PM

Re: HP 500 carb spring recomendations

sre,
The springs for the HP 500 cam (#169611) are Crane part #99896.
132#@1.906"
414#@1.306"
Stack 1.085"
470 #/in.
Retainers #'s vary according to application.
As per infomaniac the Isky springs are good pieces.
It has been our experience that PSI springs are the finest springs on the market today. They supply many IRL, Cup, Busch, Truck, Pro Stock, etc. teams today and also manufacture the premium Tool Room line for Isky.
Bob

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