Back4More

Anyone remember what the Crane PN is for the 500HP Spring?
Thanks!

BadDog

I don't recall the Crane springs being recommended very often. I believe many were using the Comp Cams Valve springs 249-929-16. We have many more choices now that should last longer.

rlj676

I think most of us are using Isky performance series, should last much longer. I can't remember the PN though.

jeffswav

Isky's are better, get ahold of Bob "RMbuilder", he can get them for you.

Throttle Fever

iTrader: (9)

8005 are the Isky's

jeffswav

The endurance series is made from "tool" steel. They are suppose to last longer and take more abuse.

HavinATantrum

Just the info I was looking for, Isky 8005 performance springs. Can someone list the recommended PN of the retainers and locks or do you use the original items over which I doubt. Thanks

HavinATantrum

Assuming that you will be using the stock OEM HP500 cylinder heads? If that's the case you have 3/8 valves. My preference on the Springs is always the Isky over the Comp. Your best choice here would be the 8005+ endurance spring. If using a 7° retainer the part number is 175 – ST and the keepers are VL-800.

Budman II

iTrader: (1)

OK, I am looking at the catalog for Isky springs on FlatLanderRacing's site, and they list a PN 8005-A, 1.530 diameter, dual spring, 135 lb seat pressure, 395 lb open pressure, up to .650 lift. Is this the right spring? I did not see a plain "8005" PN listed.

My cam comes in with a little lower lift than the stock HP500 cam, so the .650 max lift should be fine for me.

Thanks.