KX Riders

Maintenance & Technical => KX500 Original => Topic started by: jonny500 on June 19, 2010, 11:17:21 AM

Title: exhaust port duration formula
Post by: jonny500 on June 19, 2010, 11:17:21 AM

this is not to do with a kx 500. just coldnt find a catagory to put it. im am use a book called TWO STROKE TUNING BY A. Graham Bell. i am using the exhaust port duration fomula. my problem is where he get cos(0.22553) to = 77. i thought a cosine could never = more than 1. is this a printing error or am i being stupid :? any heplp withis would be greatly recieved
regards
john

Title: Re: exhaust port duration formula
Post by: jonny500 on June 19, 2010, 11:18:26 AM

.

Title: Re: exhaust port duration formula
Post by: jonny500 on June 19, 2010, 01:30:00 PM

sorted, it should be inverse cosine. it is a miss print. if anyone has book look out for it