diffrence between??
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From: NJ
diffrence between?? ok what is the diffrence between flat plane crank and a dual plane crank. friend of mine asked me and im not sure. i dont think it has anyting to do with lsx's but it might i dunno lemme know thanks
Ryan
Ryan
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From: K-W, Ontario
Could you possibly be talking about 90 degree crank (dual plane) and a 180 degree crank (single plane)?
When looking from the front of the crank shaft, the crank arms of a 90 degree
crank will make a '+' symbol, whereas a 180 degree crank forms a line " I "
When looking from the front of the crank shaft, the crank arms of a 90 degree
crank will make a '+' symbol, whereas a 180 degree crank forms a line " I "
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From: NJ
im not sure he was reading about a new BMW M3 v8 comin out and he just asked me whats the diffrence bewtween a flat plane and a dual plane and i had no clue so i figured id ask on here sense a ton of u guy r smart as hell.
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From: K-W, Ontario
Check out this article, about mid-way down the page on the right side, you
will see a diagram of 3 crankshaft types:
http://www.mustangandfords.com/howto/29178/
will see a diagram of 3 crankshaft types:
http://www.mustangandfords.com/howto/29178/
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From: Upstate NY
A 180° crank, "single plane" or "flat" crank treats a V8 like two 4 cylinder engines as far as exhaust tuning is concerned because all the cylinders on a bank fire at even intervals of 180°. They also vibrate a lot more than 90° "two plane" cranks we normally use.
Two common uses in racing are 2006 F1 V8s and IRL V8s. The have a districtive sound when unmuffled.
Two common uses in racing are 2006 F1 V8s and IRL V8s. The have a districtive sound when unmuffled.
10 second playa
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Originally Posted by Old SStroker
A 180° crank, "single plane" or "flat" crank treats a V8 like two 4 cylinder engines as far as exhaust tuning is concerned because all the cylinders on a bank fire at even intervals of 180°. They also vibrate a lot more than 90° "two plane" cranks we normally use.
Two common uses in racing are 2006 F1 V8s and IRL V8s. The have a districtive sound when unmuffled.
Two common uses in racing are 2006 F1 V8s and IRL V8s. The have a districtive sound when unmuffled.
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Verdad Gallardo TECH Fanatic
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From: Upstate NY
Originally Posted by Anonymous
What is the advantage to using the flat crank?
A 180° crank, "single plane" or "flat" crank treats a V8 like two 4 cylinder (edit: INLINE) engines as far as exhaust tuning is concerned because all the cylinders on a bank fire at even intervals of 180°. They also vibrate a lot more than 90° "two plane" cranks we normally use.
You can get better exhaust scavenging and intake tuning if all cylinders on one bank fire 180° apart like an inline 4 rather than 270°, 180° and 90° apart like with a 2-plane crank V8.
To get 180° exhaust pulses in 4>1 headers on 2-plane V8s you need to use crossover primaries. If this isn't allowed or practical from a packaging viewpoint, the flat crank V8 can usually be tuned to produce slightly more power inspite of more severe vibrations than a 2-plane.
Revability should not be different.
FWIW, the V10 F1 engines of the recent past were built on various bank angles like 72°, 90°, 106°/108° and some others. For exhaust tuning they were treated like 2 inline five cylinder engines.