| [ Total Views: 620 | Total Replies: 9 | Thread Id: 7170 ] |
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 duncombemu
A.k.a.: Mark Atkins
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 posted on June 4th, 2003 at 11:27 PM |
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Straight cut cam gear question
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
Don't ever let anyone tell you, "It can't be done."
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1303Steve
A.k.a.: Steve Carter
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| posted on June 5th, 2003 at 12:07 AM |
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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
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duncombemu
A.k.a.: Mark Atkins
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| posted on June 5th, 2003 at 12:15 AM |
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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
Don't ever let anyone tell you, "It can't be done."
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1303Steve
A.k.a.: Steve Carter
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| posted on June 5th, 2003 at 12:31 AM |
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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
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duncombemu
A.k.a.: Mark Atkins
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| posted on June 5th, 2003 at 12:35 AM |
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Brilliant as usual!!!!!!!!!!!
1302S, thanks.
I'll have a talk to Boris at VVWS about it.
Regards,
Mark:thumb
Don't ever let anyone tell you, "It can't be done."
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1303Steve
A.k.a.: Steve Carter
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| posted on June 5th, 2003 at 01:06 AM |
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No worries, your to kind:o
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Sick68VW
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| posted on June 5th, 2003 at 09:33 PM |
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i just put one in my motor i havent statared it but cant wait should turn some heads does it really add horse power
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 vw54
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| posted on June 5th, 2003 at 09:43 PM |
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Noise is the word
you can hear straight cuts coming a few blocks away
They make a strange sound...
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shiftyvw
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| posted on June 5th, 2003 at 09:44 PM |
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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
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 Peter Leonard
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| posted on June 5th, 2003 at 09:56 PM |
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straight cut
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 
let sleeping dubs lie
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OvalGlen
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| posted on June 5th, 2003 at 10:41 PM |
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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.
Regards,Glenn>
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duncombemu
A.k.a.: Mark Atkins
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| posted on June 5th, 2003 at 10:49 PM |
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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
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70AutoStik
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| posted on June 6th, 2003 at 02:50 AM |
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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.
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