how to build more torque


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By 59flatbedford - 15 Years Ago
ok so im interested in building a very torque Y-block using a 59 block and heads out of a F100. Now im more interesting in generating low end torque rather than high hp numbers which is kinda backwards from most builds on here. so im gunna need some help on this but i have some ideals.



1. increase stroke, i know longer strokes often make more torque lower in the rpm range so what the best way to do this.

Option 1. offset grind my existing crank. Probably cheapest but im unsure what else would be required. Would i have to use different rods and pistons?

option 2. 312 crank turned down. about the same amount of unknowns.

option 3. Mummert stroker kit. Most expensive out right but the easiest.



2. Intake manifold. most aftermarket one are designed for high revving hp so whats the best option for low end performance. Stock two barrel, stock 4 barrel, 2x3(for low end and wot??)??



3. Exhaust. What size of pipes, 2.25 duals, 2.5 single???



4.Cam choice. Im guessing something pretty mild??

this motor will be going into a 4x4 truck rarely revved higher than 4000. Truck will be a manual also if that matters. Any advice you experts out there can offer would be great. Thanks and sorry for all the questions.
By Ted - 15 Years Ago

Here are some generics for increasing the torque.

Increase the compression ratio.

Four barrel carb.

Four hole spacer under carb.  Experimentation will determine the ideal height.

Crossover pipe behind the engine on the dual exhaust.

Carburetor.  Not necessarily small but metering must be doing its job.

Gearing.  Engine must be running in it’s ‘band’.

Camshaft.  Having a split duration with a closed exhaust system in this case will improve the lowend torque numbers.  Smaller intake duration with a larger or longer exhaust duration.  Lobe centerline and where the camshaft is installed are all players.

Ignition curve.  Both the mechanical and vacuum advance must be in harmony with each other.
By 59flatbedford - 15 Years Ago
ok thanks for that help. im planning on upping the compression via decking the block and milling the heads slightly. I'm going to shoot for 9:1or a little higher, (whatever i can get away with safely). Ill probably pick up a smaller 4 barrel with vacuum secondaries and a 4 barrel manifold. Im open to suggestions on the manifold as im unsure that an aftermarket aluminum would benefit me and my goals. Would a factory one be better? I know that my local machinist has experience with Y-blocks (he has a 312 with triple deuces in a 56f ford) so i will likely talk to him extensively when i go to build this motor but i would like to be well informed so any specific info you guys can give would be great.