Can a Flat Tapped Cam work with Rollers?
Thread Starter
Instructor
Joined: Jan 2013
Posts: 183
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Can a Flat Tapped Cam work with Rollers?
So my friend is looking to install the CompCam 12-671-4 (L79) cam in his Gen I 350 block, its from a 89' corvette, he has it convert'd to EFI carb(Holley Avenger Setup) Its pretty sick looking actually.
I apologize if this is a stupid question. But with his block having roller lifters and the cam he's looking to install is a flat tapped. Can this cam work with a Roller?
thank you again for your time and input!
I apologize if this is a stupid question. But with his block having roller lifters and the cam he's looking to install is a flat tapped. Can this cam work with a Roller?
thank you again for your time and input!
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
So my friend is looking to install the CompCam 12-671-4 (L79) cam in his Gen I 350 block, its from a 89' corvette, he has it convert'd to EFI carb(Holley Avenger Setup) Its pretty sick looking actually.
I apologize if this is a stupid question. But with his block having roller lifters and the cam he's looking to install is a flat tapped. Can this cam work with a Roller?
thank you again for your time and input!
I apologize if this is a stupid question. But with his block having roller lifters and the cam he's looking to install is a flat tapped. Can this cam work with a Roller?
thank you again for your time and input!
Flat tappet cam and flat tappet lifters in a roller block - Yes.
Will
Team Owner
Joined: Sep 2003
Posts: 20,179
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From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
The cam profile is vastly different between a flat tappet and roller lifter.
Do yourself a favor and recommend he do it right.
Do yourself a favor and recommend he do it right.
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
I wonder what would actually happen with a flat tappet cam installed with roller lifters? Instant binding? immediate destruction of the valve train? Beating the rollers off the lifters? Too much lift and breaking springs? nailing pistons?
Knowing the shape of the lobes is completely different...I know better, but never knew what the destruction would be...
Knowing the shape of the lobes is completely different...I know better, but never knew what the destruction would be...
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Then there's the open/close profile design (performance) a flat tappet uses for lifter life.
And the surface hardness that might be destructive to the rollers.... or cam
Race Director
Joined: Jun 1999
Posts: 14,924
Likes: 9
From: Merritt Ils Fl
I wonder what would actually happen with a flat tappet cam installed with roller lifters? Instant binding? immediate destruction of the valve train? Beating the rollers off the lifters? Too much lift and breaking springs? nailing pistons?
Knowing the shape of the lobes is completely different...I know better, but never knew what the destruction would be...
Knowing the shape of the lobes is completely different...I know better, but never knew what the destruction would be...
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