hey everyone.... my friend is building a 69 Chevelle and already has a Turbo 400 with a 2300 rpm stall convertor. He just bought a 350 crate motor from a small builder locally with a hydraulic roller cam 220/230 @0.050 .502/.510 lift with a 114LS. It has a 10 bolt with 3.08's and he will use it for cruising and short weekend trips.

Is the 2300 stall rating a good match for this cam?

thanks

I think it will be fine.

That cam would need very little stall improvement over stock. A 2,200-2,400 would be ideal for the strip but it would a slight problem with additional heat on the street. It would need an auxiliary cooler to shed the energy (horse power ) you are letting slip away. GM engineers added 400 RPM to the Corvette TH 350 torque converts over the stock Chevy, but I don't know if they built one for the TH400. A TH400 was usually only used with a BBC and didn't need the help of a higher stall to get the 'vette moving (or tires spinning anyway).


Larger Dave

That cam would need very little stall improvement over stock. A 2,200-2,400 would be ideal for the strip but it would a slight problem with additional heat on the street. It would need an auxiliary cooler to shed the energy (horse power ) you are letting slip away. GM engineers added 400 RPM to the Corvette TH 350 torque converts over the stock Chevy, but I don't know if they built one for the TH400. A TH400 was usually only used with a BBC and didn't need the help of a higher stall to get the 'vette moving (or tires spinning anyway).


Larger Dave


Dave, so you are saying a tranny cooler is a necessity for him for durability?

Yes. Even with stock cams the tranny cooler in the radiator is barely adequate. That is why taxi cabs, police cars, and pick-ups with a towing package get an auxiliary transmission cooler for the stock converter which stalls at about 1,200 to 1,600 RPM depending upon engine torque. As you add stall you are slipping the torque converter by shearing the fluid which converts mechanical work into heat. That heat bakes the fluid which kills trannys.

Larger Dave

Yes, I should have said something about a cooler... but if he was already running that converter he should have had one. :pout: