Martinshuter

Morning guys,

Im considering getting 2nd gear and 3rd gear straight cut on my 4x4 saff by pete doughty precision engineering. has anyone had any experience of this and any ideas what sort of cost im going to incur? what are the benefits and drawbacks?

Cheers guys
Martin

Stu.H

Make ur mind up chappie

Anonymous

Benefits are that its easy to pick a slightly different ratio and it gives less of a side loading.

Neither of those things is really any use on a road car IMHO

Straight cut cogs are good for racing when you need a cheap way of changing ratios etc, but i cant see why anyone would want them on the raod unless its a situation where slideloading is excessive on helical gears (mini drop gears for example, or pulsar gearbox where the case can get mullered on a launch)

Stu.H

Chip, I totally agree mate, in fact i'd agree even more if i knew what the fook u were on about

Anonymous

Normal gears are cut at an angle, this means that they smoothly transfer the power between them from tooth to tooth, but when they do so they get pushed sideways (side loading i mention)

Straight cut gears are exactly what it says, the teeth are cut straight (like any cheap machinery tends to be), this means they dont get shoved sideways but it also means they are noisey and wear out quickly as the shock loads of smashing from one tooth to the next removes the case hardening very quickly.

Summary:
Great for racing
Crap for road cars

BigNige

I never broke my Pee Doughty box

cost is about £2.5k and youll need a good donor box to start with IE not one that is exploded internally

Pros

Strong
Great noise

Cons

Noisy
Not Cheap

Nige

gingeRS

it did sound top

BlueSmoke

What about his crack habit? Does that affect his workmanship?

Franco

iTrader: (2)

I thought that would of come sooner than that!

PS PM Paul R, his is at PD's at the moment!