Cam shaft - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*boytoytrading* · 05-25-2003, 04:00 PM

Doe's anybody have info on which cam I should use in a 402 BB, I've got a Offenhauser in-take tunnel ram that i'm putting on top, truck has 4-11 gears, and a 770r4 tranny. Keep in mind, I'm also at 6500 ft in elevation. Thanks

PanelDeland · 05-25-2003, 04:30 PM

Call the cam manufacturers.Be able to give them;
weight of vehicle
gearing (Tranny and rear end)
motor size (boreXstroke)
heads
compression ratio
valve size
induction
intended use of vehicle
whether it has power; steering ;brakes ;other vacuumn related accessories
know what type of ignition and any other pertinent data about your combo.All of these factors will influence cam selection.
They will be able to give you recomendations on the best cam for your application.
You are probably not going to get much street performance with a tunnel ram but it can be somewhat compensated for by the cam.
You really need to determine what you want the combination to do then buy/build from that.Most of the time you need to match parts in order to get the engine to do what you want it to do.A tunnel ram looks cool sticking thru the hood but it doesn'tusually produce much low end power.Of course if you are building a straight up stip truck and need the H.P. at high RPM then you may need the ram.

05-25-2003, 04:00 PM	#1
boytoytrading Account Suspended Join Date: May 2003 Location: Base of Pikes Peak, Colorado Springs Co Posts: 376	Cam shaft Doe's anybody have info on which cam I should use in a 402 BB, I've got a Offenhauser in-take tunnel ram that i'm putting on top, truck has 4-11 gears, and a 770r4 tranny. Keep in mind, I'm also at 6500 ft in elevation. Thanks

05-25-2003, 04:30 PM	#2
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Call the cam manufacturers.Be able to give them; weight of vehicle gearing (Tranny and rear end) motor size (boreXstroke) heads compression ratio valve size induction intended use of vehicle whether it has power; steering ;brakes ;other vacuumn related accessories know what type of ignition and any other pertinent data about your combo.All of these factors will influence cam selection. They will be able to give you recomendations on the best cam for your application. You are probably not going to get much street performance with a tunnel ram but it can be somewhat compensated for by the cam. You really need to determine what you want the combination to do then buy/build from that.Most of the time you need to match parts in order to get the engine to do what you want it to do.A tunnel ram looks cool sticking thru the hood but it doesn'tusually produce much low end power.Of course if you are building a straight up stip truck and need the H.P. at high RPM then you may need the ram. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"



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