?'s on Crane Single Valve Springs

Dangerous Dave · 12-05-2001, 05:29 PM

I have them on my stock ported heads right now with an F-cam and stock rockers, but I am having an issue with the valves floating at about 6050 rpm's. I'm almost positive I ran these same springs up to 6300 rpm's with an E-cam and 1.7's(more lift) without any problems for 2 years. What is anybody else running with these same springs? I believe they are the conical springs-the springs that come with locks and retainers in the same package you can get through Jegs or Summit for $115 or so. Part #270-44308-1 in Jegs. Thanks.

PKRWUD · 12-08-2001, 06:04 AM

Keep in mind that you're only talking a difference of 250 rpms, and the springs are at least 2 years old now, and have been well used. Sounds like routine wear to me.

Take care,
-Chris

2FastLX · 12-09-2001, 09:19 AM

I am running the F cam and the Crane single valve springs. I have the EXACT same problem as you. If I speed shift the valves float something fierce.

12-05-2001, 05:29 PM	#1
Dangerous Dave Registered Member Join Date: Sep 1999 Location: Minneapolis, MN Posts: 121	?'s on Crane Single Valve Springs I have them on my stock ported heads right now with an F-cam and stock rockers, but I am having an issue with the valves floating at about 6050 rpm's. I'm almost positive I ran these same springs up to 6300 rpm's with an E-cam and 1.7's(more lift) without any problems for 2 years. What is anybody else running with these same springs? I believe they are the conical springs-the springs that come with locks and retainers in the same package you can get through Jegs or Summit for $115 or so. Part #270-44308-1 in Jegs. Thanks. __________________ 1984 Mustang 1997 Miata

12-09-2001, 09:19 AM	#3
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	I am running the F cam and the Crane single valve springs. I have the EXACT same problem as you. If I speed shift the valves float something fierce. __________________ Project: 1988 Coupe - EFI 5.8L Twin Turbo with Victor intake, Canfield heads, F303 cam, March aluminum underdrive pulleys, TKO (or T56 if funds permit), PBR twin piston calipers and 13" rotors up front, 94 Cobra rear calipers and 12" rotors on the rear, 3.73's, Griggs K-member, tubular front control arms, torque arm and panhard bar, polished 99 Cobra wheels. "The GR-40 kit installation is now complete, and the humble Fox-chassis car will now out-corner and out-stop a ZR-1 or a Viper, and support massive horsepower additions with perfect balance." Griggs Racing ICQ# 42269241

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12-08-2001, 06:04 AM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Keep in mind that you're only talking a difference of 250 rpms, and the springs are at least 2 years old now, and have been well used. Sounds like routine wear to me. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!