|
Title: Pros and cons of straight cut cam gears... Post by: Wejjy on May 24, 2017, 21:29:39 pm As per the title, Im aware of the obvious ones like the whine, no thrust etc, but what are the advantages from a perceivable point of view. i.e longevity, noise levels etc as Ive never known anyone use them?
Thanks in advance. Title: Re: Pros and cons of straight cut cam gears... Post by: RaptorLou on June 22, 2017, 03:49:05 am Straight is all I use. Less power loss through gear set than helical gears. I like the whinnnneeee ;D
Title: Re: Pros and cons of straight cut cam gears... Post by: modnrod on June 22, 2017, 14:39:46 pm I once tested one of our local cars we have here that I played with for years, six cylinder engine, but still I think applicable.
Bore 92mm, stroke 76.2mm, 41.1/36.0 valves, pushrods, etc. Anyway, going from helical gears to straight cuts, and an elec fuel pump instead of mechanical, gained (drum roll please......) 1.1/2 tenths and 1mph on a mid-15sec car. I even reversed it all to double-check. See? It really IS a power mod. :D But really I just like the whine too! Title: Re: Pros and cons of straight cut cam gears... Post by: Bruce on June 24, 2017, 20:48:18 pm .... going from helical gears to straight cuts, and an elec fuel pump instead of mechanical, gained (drum roll please......) 1.1/2 tenths and 1mph on a mid-15sec car. How much lower was the oil temp with the straight cut gears?I even reversed it all to double-check. See? It really IS a power mod. Title: Re: Pros and cons of straight cut cam gears... Post by: modnrod on June 25, 2017, 03:58:45 am How much lower was the oil temp with the straight cut gears? Dunno Bruce. this was on a water-cooled cast-iron engine (like a smaller version of your Chev 250). I use them on ACVWs coz I like them, never bothered testing them. |