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Author Topic:   377-why
posted February 03, 2004 09:13 PM
My engine guy says run a 377. He wouldn't say why. What is the common reason why people prefer these? Are they external or internally balanced? Looking for good ,reliable engine combo for mod racer with a little experience.


Jim Harden

Ego Racing
posted February 03, 2004 09:24 PM
Big bore short stroke. Good Torque and revs quicker than a std 400. As for ballanced you can run it either way, When you have the assy balanced just let your machinist know and he can do it. We ran a 400 internal for a while.

posted February 04, 2004 08:08 AM
They are internally balanced because they use a 350 crankshaft. I would reccomend having your machinist balance any engine you have built. The 377 is a very good high rpm engine. It has a less torque than a 400 but will rev easier and last longer because of the shorter stroke. On the other hand if you are just getting started i would seriously look into a good old 355. Its an easier build and a little cheaper build and the blocks are easier to come by.

posted February 04, 2004 01:50 PM
Be sure that your builder is talking about the short-stroke, big-bore 377 versus the 4.00" bore, 3.75" stroke 377.

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