I am looking forward to rebuild my trans.

Anyone put straight cut gears into their GB? I am hoping to put gear 1-2-3-4 on straight cut. Using Hexlical 5 and 6 for cruising.

 

Why?

 

For what reason , and where can you buy them?

 

If this is even possible, I suspect you would get really tired of the gear whine by the end of the second day. Thinking I would stay with the stock gears.

 

They do exist, though not widely used

A straight cut setup's primary advantage is flexibility, as they are able to be obtained in a wide range of ratios vs OEM helical gears. Some will argue a straight cut is automatically stronger, but that assesment is application specific.

Might want to consider that OS Giken now has their close ratio gear set released. While not a straight cut setup, it does provide a better ratio choice vs stock for some users, and should be able to handle a very significant amount of torque for those doing track days

http://z1auto.com/prodmore.asp?model...ne&prodid=5487

http://cornerbalance.wordpress.com/2...you-want-this/

 

Thanks Adam, my GB is still usable. Its more of a want (straight cut) then a need. I will continue my search.

 

So you want to sound like a dump truck? Is this a new trend?

 

^ LOL

 

Even worse, I've heard cut gears don't like being granny shifted (street driving). Do some searching around on some different forums/sites and really get to know what your asking for. I say contact the companys selling them and see what they say. I also think Modified Mag has a good article about them within the last couple of months. I don't think its worth the "Originallity" points, but to each their own.

I think the close ratio gearset from OS G is a far better option for a street car.

 

i wish they woulda made a much longer 6th gear. we already cruise at WAY many revs.

you would never be racing in 6th gear anyhow. somthing like a 0.65 would be sweet. 2000 rpms at 70 mph would boost gas mileage alot compared to 3000 rpms.

 

Thanks Zazz93, but I am looking at straight cut gears not dogbox sequential gb. they are different...

 

I agree....an extremely tall 6th gear would be cool....solely used for highway cruising..

 

My apologies, your right I was mixing the two up.

 

Your reverse is straight cut so thatll give you an idea on the sound lol. But our gearbox is extremely strong, especially the cd009. If you were onna do a gear, I'd go 6th only- but only if they offered a tall gear like stated above

 

I agree +3

 

Hang on... Are you talking about spur gears? I could be wrong, but I thought "straight cut" referred to how they were made at the beginning of the industrial revolution and they stopped making them that way as soon as they possibly could. Each spur gear tooth now has a "volute" shape to maximize contact area and minimize stress.

 

PAR and PPG both have straight cut gears available for the Z though they don't show on their websites. Not sure why you want them, but they exist.

Dogbox, straight cut, and sequential gearbox are 3 separate ideas by the way. They can be combined in any combination, but the ideas themselves are disparate. "Dog" is how the hub engagement is designed (as opposed to synchronized), straight cut is the helix angle of the gear teeth themselves (or lack thereof), and sequential is a function of the shift mechanism. You can have a straight cut dog box which is not sequential, or a sequential dogbox which is not straight cut, etc.

BTW, if it's just strength or noise you are after, you don't have to go straight cut. The reduced helix angle of the PAR 3rd and 4th helical cut gears will whine all you want and is stronger than hell.

http://www.youtube.com/watch?v=DftM_1IFq_s

 

Yes he is talking about spur gears. Straight cut while not technically correct is still in wide and common usage, much wider usage than "spur" is. You're talking semantics, and you knew what he meant I suspect...

 

I think you need to really decide what the cars purpose is going to be first,
Second I think you need to buy gears based on POWER because if you plan on runing higher gears 1-4 gas is gunna suck, And is you get a full set and shorten 6th its really going to suck. IMO the stock gears and a 3.3FD are perfect for street and the occasional hi mph. The gears are perfect for our powerband.The only reason you get 3.5FD in HR is the extra 1k revlimit, it evens out but still... Besides the more power the tall you want them anyways.. The top of 5th is 143 mph as is... and pull is fairly linear considering we only have 280hp. Drag, go with a close ratio, weekend warrior, upgrade to a 3.5FD and work on clutch and flywheel stuff. if your doing it for ***** and giggles, dont waste the time or the money...spend it on a niice clutch n flywheel setup and a Quife lsd.. make what you spend logical and functional.

Hope I shared some usefuul info, please keep the thread updated with updates as they come, I'm curious to see how this plays out.

Thanks!