F.5 head on 2F engine (5 Viewers)

[SergP]

Finally, locate the source of the oil. This was in a cold engine. I will replace the valve stem seals in this cylinder.

 

[BullHab]

I have fresh rebuilt 2F -5spd and you’re dreaming if you think your going to pull 65-70 up hill….slight incline no problem, kingsbury grade not happening.

Never dreamed or Kingsbury grade at those speeds. You are correct at maintaining 65 in freeway driving as a goal.

 

[flx]

Not sure what Kingsbury grade is but I regularly take a Freeway with multiple 6% ascents and my F.5 is fine accelerating up to the max speed of 130kph (~80mph) in 4th gear, as long as I am already at a speed that allows to open the secondary body of the carburetor (I think it's around 50mph in 4th).

Done this multiple time, stuck on the right lane behind a truck at ~55mph in an ascent, pressing the gas all the way down, the secondary opens (in one shot on a F carb) and puts a big kick all the way to 80mph, which helps a lot to insert on the passing lane with the flow.

For driving a long time at stabilized speed it's happier at ~70mph.

 

[BullHab]

Not sure what Kingsbury grade is but I regularly take a Freeway with multiple 6% ascents and my F.5 is fine accelerating up to the max speed of 130kph (~80mph) in 4th gear, as long as I am already at a speed that allows to open the secondary body of the carburetor (I think it's around 50mph in 4th).

Done this multiple time, stuck on the right lane behind a truck at ~55mph in an ascent, pressing the gas all the way down, the secondary opens (in one shot on a F carb) and puts a big kick all the way to 80mph, which helps a lot to insert on the passing lane with the flow.

For driving a long time at stabilized speed it's happier at ~70mph.

Kingsbury grade is a steep 2 lane road from Reno Nevada up and over to Lake Tahoe. Un less in a sports car, no one is doing 70 mph on it. I agree with you that the 2F motor is capable reasonable freeway speeds. I try not to run over 3k RPM, which currently gives 70+ mph.