If a straight cut cam gear creates less drag and increases horse power. It also reduces thrust load on the cam bearing, then why don't all engines use them instead of the standard type helical type cam gears?
Regards,
Mark:thumb

Hi

They are noisy with straight cuts. If you want to go 1/2 way use 36 hp cam & crank gears , they are between stock and straight cut.

1302Steve

So 1302Steve, is it only noise that's the 'problem'. If it is, then I don't have a problem. I run a pair of Cannons on my Baja, lots of noise. I probably wouldn't hear them. I can't even hear the radio/cassette. I'm building a 1914 cc motor, so does the '36 hp cam & crank gears' apply to such a motor?
Regards,
Mark:thumb

Hi

The straight cuts are very noisy, but sound cool. The 36 hp crank gear fits straight on, the cam gear needs to be spot faced & bolted on like after market gears are.

1302Steve

Brilliant as usual!!!!!!!!!!!
1302S, thanks.

I'll have a talk to Boris at VVWS about it.
Regards,
Mark:thumb

No worries, your to kind:o

i just put one in my motor i havent statared it but cant wait should turn some heads does it really add horse power

Noise is the word

you can hear straight cuts coming a few blocks away

They make a strange sound...

I have them in my car. They are LOUD at idle and low rpm but at criuse and when on the gas you cant hear them over the other noise from exhaust carbs etc.

straight cut isn't as strong as helical or whatever the VW ones are... I'm not sure if this makes a big difference. but imagine it like this: slopey cut gears are making more and more contact gradually, a bit of the gear at a time thru the [contact patch] and release contact gradually out the other side. I hope you're not as confused as me after posting this..
wes could probably explain it a bit better with the correct terminology etc

also that noise surely means more wear..
I have them on my Oval.
I love driving it around the suburbs, whining up and down the rev range
But on the Freeway they are " ANNOYING " .
The create the most horrible dronning at 3500 rpm constant. But i'd much rather do long distance hauls in the Kombi any way..!
Would I put them in my next car ? ... Yes, they sound great for the majority of my driving.

Yes 'Peter Leonard', I do understand. I liken it to the sound that the Group A V8's gearboxes make. That... how do you say it... noise that they make and the clunking noise thay make when changing gears. It's all very noisey.
Mark
:thumb

The whine of the Group A's (I hate misusing an apostrophe like that, but it just doesn't look right without it,) is straight cut gears, the clunk is the dog-clutches engaging - you won't get that, and believe me, you wouldn't want it: a dog-box on the road would be a real pain in the rear - ask any group A driver...

The hollinger is a great racing box, don't get me wrong, but even a box with welded sychros can get to you on the street.