| Re: Make a 350 out of a 400??? |
Subject: Re: Make a 350 out of a 400??? by BeachBum on 2009/6/24 21:53:44 Quote:
Thats an old article, I remember reading it around 10 years ago or so.... But, I do not like the idea, the only reason to run a destroked motor like that is if you're running in a heads-up class that requires a cubic inch limit.... and your approach is to spin the motor as high as you can such as 8000+ rpm. There might be a road racing reason to run it due to extended high rpm jaunts, but not sure. It was and is fairly common to see some racers de-stroke a 400 with a 3.48" crank (Standard for all 350's) to get 377 cubic inch motor, which is better, it gives you the big bore you want to unshroud the valves and yet the rod/stroke ratio will in theory now let you rev the motor way up..... but even that, isn't really done anymore..... people have figured out either with good well prepped 509 blocks or aftermarket blocks that 406's as well as 420-434's can easily go up to a respectable rpm.... just build it right the first time. If you have a good 406 which has a 3.75" crank and you're throwing in a hyd cam for the street.... there is no reason in the world that I can think of to destroke it to even a 377 let alone that 327 mini-crank..... If you have a "good" 400 block, if I was you, I would actually do the opposite of what they say and slide in a 3.875" crank to get 421..... it'll do great at all rpm's under 6500 rpm, loads of torque and HP. But, have fun with whatever you do.  |
