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Author Topic: Valve spring help jaybquick ¯ Member # 4286 posted                                 I am getting a custom cam ground for my 347. It will have .600 lift and the cam builder said I should have a spring with 380 to 400lb when fully open and about 130 to 150lb on the seat. I will be running Comp Cams stock type roller lifters and 1.6 rockers. Right now I have AFR 185s with the 1.43" OD springs and a 1.8" installed height. I will be installing titanium retainers. My question is, what spring should I run to keep valve float away at least until 6500rpm. I am looking at Comp 987-16s go HERE(2nd row 2nd column) or Crower 68382-16 go HERE (page 33 of 42) Any other recomendations will be greatly appreciated. Thanks -------------------- 91 Mustang GT ET: 11.92@115 66 Mustang ET: 11.43@119 01 Audi S4 ET: 10.8@131 05 Audi S4 ET: 11.9@116 08 Audi S5 ET: 11.9@118 Posts: 416 | From: Lathrop | Registered: Mar 2004  |  : AJBlackGT ¯ Member # 3936 posted                              Thats a healthy cam But i have no idea about the springs, the cam grinder probably knows best, so anything within his specs would probably work fine -------------------- 90 Notch Posts: 1896 | From: Sacramento | Registered: Dec 2003  |  : 93PONY Mr. Valve Events Member # 60 posted                           The comp springs will NOT cut it. The best springs I've used have come from Ed Curtis. 425lbs on the nose w/145 seat, XE lobes w/.600+ lift & over 7000rpm without valvefloat. www.flowtechinduction.com Ask for the Pure Street springs. Those things rev to 8K in race cars with stock lifters. -------------------- www.advancedenginedevelopment.com SCT dealer Dynotuning (916)715-7569 Posts: 4266 | From: Fair Oaks, CA | Registered: Nov 2000  |  : jaybquick ¯ Member # 4286 posted                                 thanks 93 pony, anyone else got ideas. I am just double checking on my cam grinder. -------------------- 91 Mustang GT ET: 11.92@115 66 Mustang ET: 11.43@119 01 Audi S4 ET: 10.8@131 05 Audi S4 ET: 11.9@116 08 Audi S5 ET: 11.9@118 Posts: 416 | From: Lathrop | Registered: Mar 2004  |  : AaronC ¯ Member # 86 posted                              Another vote for the PS style springs. Ed is a valvetrain genius. -------------------- 1991 GT Convertible: Stock 157k mile shortblock, HiTech cam, AFR 165 heads, Edelbrock RPM intake, 1 3/4 headers 12.23 at 112.99 Best MPH 113.97 Posts: 776 | From: woodland | Registered: Dec 2000  |  :

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