ZROSSA Posted September 30, 2001 Share Posted September 30, 2001 Not being a V8 person untill a week ago i am curious if people run flat plan cranks in there V8's. It seems that with modern engine management systems that the problem of the changed firing order would be easy to over come and you would have better exhaust scavaging and no need for a x-over pipe. Any thoughts? Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted October 1, 2001 Share Posted October 1, 2001 These are called 180 degree cranks. Ferrari uses it in the 360 Modena. If I remember correctly, circle track racers used them (may still for all I know). A little rougher than typical V* crank, but that RIPPPPING sound is neat! Who can can tell us more! Brad Quote Link to comment Share on other sites More sharing options...
QWKDTSN Posted October 1, 2001 Share Posted October 1, 2001 What? What? I have no idea what you guys are talking about, and that scares me I try to at least have some idea of just about everything in the automotive engineering section of life.. Quote Link to comment Share on other sites More sharing options...
ZROSSA Posted October 1, 2001 Author Share Posted October 1, 2001 Lotus akso use one in the V8 Esprit. A flat plan crank has the crank pins at 180 degrees from each other as opposed to 90 degrees on a normal one. Picture 2 inline four cylinders shareing a crank. this makes echaust tuning much easyer. Quote Link to comment Share on other sites More sharing options...
Guest Justin Posted October 2, 2001 Share Posted October 2, 2001 If somebody makes a 180 degree crank for an SBC as well as a distributor and appropiate cam... I'd definately like to know about it. Quote Link to comment Share on other sites More sharing options...
ZROSSA Posted October 3, 2001 Author Share Posted October 3, 2001 Anyone know were to get one for a 350 and what would need to be done to get it to work on the ignition side of things. Could you get away with swaping the spark plug leads around? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 10, 2001 Share Posted October 10, 2001 From a practical standpoint, I was taught that it is virtually impossible to couple two four cylinder engines to the same crank and fire eight cylinders evenly with a single camshaft. The flat plane crank engines I have dealt with have the same firing orders as a single four banger on each bank. They solve the cam and firing problems with twin cam heads and two distributers (Ferrari 308). If I remember correctly, the requirement of offsetting the "buck" of each firing cylinder with the next, dictates very few firing orders which will allow a V-8 engine to run reasonably smooth from a vibration standpoint. I may be all wet about this, but in my defense, college was a lot of leaded fuel ago! Quote Link to comment Share on other sites More sharing options...
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