I found a way to convert your 320/360 engine to a roller cam and lifters for around 2700.00. Would you spend the money to convert?
Thanks,
Jesse
I found a way to convert your 320/360 engine to a roller cam and lifters for around 2700.00. Would you spend the money to convert?
Thanks,
Jesse
No.
I wouldn't do it if it were free.
David - nice (but useless) statement. Care to continue on and give reasons why you wouldn't do it?
Not trying to be snarky. Just wonder what your opinion is based on.
Lycoming spent a ton of money to get the roller cam system certified. It is designed into new engines and is not available as an upgrade to older engines.
I do not believe anyone has successfully upgraded the older engines to roller technology. A system was offered some years ago but nothing came of it. To jump into this deal has questionable benefits and certainly would place the buyer in a beta test mode.
That's why I would not do it.
When Lycoming originally developed the roller lifter setup they found that there was a significant gain in HP due to the reduction of internal friction losses. To keep within certification HP that they had to dial back the cam timing so the engine power would remain constant.
Am I reading what you are saying right....... that roller tappets with the standard cam can give s 15% power gain...... 23hp on a 160?
If so thats a significant increase, whether its worth 2700, is another matter.
So if one deviated from this and was able to make a stock cam work with a roller lifter setup (which is possible) then there would be a significant benefit in power and volumemetric efficiency.
Certainly a different cam profile would be desired when using a roller cam with higher lift and longer duration, which the stock Lycoming roller tappet cams don't do. Most automotive cams have a small angle ground into the profile to make the tappet rotate and I'm not sure that Lycoming cams are this way. I would guess not. But with a stock cam assuming that it is flat used with a roller tappet, you would get more lift on either side of the cam profile but the duration at the top would be shorter.