412 ci, FE, FT cam

[Walter R. Malik]

Something in the high 260's @.050" with that tight separation will NEVER make power up-to 7,000 rpm in that engine.
My guess would be something around 278/286 @.050" on a 113 or 114, having about .370" lobe lift; (minus lash for valve lift).

Edit: F7 / F00 Ultra-Dyne SFT lobes would be close. 279/288 @.050" - Both have .3706" lobe lift. Bullet has those masters.

[F-BIRD'88]

I missed these UDHarold SFT lobes.
Available from Lunati and Bullet.
UF5 , UF6, UF7, UF23. all .371" lobe lift normally .026"± lash.
@.050" 263° ,271°, 279°, 286°
All .653" valve lift. .627" net w/lash
Walter is right, with a flat tappet cam it is going to need healthy .050" duration. Let it eat.
UDHarold said you can play with the lash on these. for tuning effect.
Verify the VTP clearance with these and your heads.

[CamKing]

This is what the engine needs to make peak HP @ 7,300 rpm.
Part# FM80383-82375-108
264/270 @.050"
.383"/.375" Lobe Lift
.019"/.020" Hot Lash
108 LSA

[frnkeore]

Thank you Randy and F-Bird. You response is appreciated. I'd also like to thank my ozzy friend, Paul, for his PM.

The UD Harold lobes aren't online, at all. I called today and they said that they would sail mail them to me free of charge.

Mike I'm sending a PM.

[F-BIRD'88]

Bullet's Ultradyne cam lobe masterlist
https://www.bulletcams.com/Masters/ultr ... sters.html