My buddy just blew his s2k tranny and wants to upgrade. He still street drives the car so dogbox is out of the question i guess. Ive been in contact with bullhead. they can get the syncro kit but said none have been sold in the USA that they are aware of. Does anyone have any knowledge of what their syncro kit is capable of? It would be a kick in the nuts to spend $6k and still bust it. Right now car has 670hp but will be upgrading to the bw 372r this winter. Is there any other companies that make or are in the process of making a upgraded gear set?

 

The K series syncro sets are great to my knowledge, Reynolds ran them on his car with no problems before the dog.. I have a H series dog from bullhead and its great. Anything they make is top notch.

 

I was told, not too long ago, that they aren't going to manufacture any synchro gear sets until they get like 3 orders or so, which who knows how long that would take? I ended up just ordering the dog box set. I drive mine on the street a ton. Yeah, it's a bit clanky, and noisy, but the trade off in strength is well worth it IMO.

I've heard there are a few companies out there that might have a solution in the very near future, but they are all in testing or prototype right now.

 

Get the dog box, that noise Carey is talking about is the best kind of noise on the street lol

 

is it hard on the gears to street drive the dogbox? i mean he drives it 4 days a week atleast not all day but for a few hours each day. Bullhead said 2 were being made right now or in very near future. I was on the understanding that they were not spoken for yet...

 

Your s2k is so sick! Your friend Joe did some tuning on our s2k before ssc closed. Im good buddies with leo troy.

Do you use the clutch when shifting with the dogbox on the street?

 

While it is possible to drive on the street with dog gears, it will also significantly reduce the life of the dog teeth (the engagement teeth) on the gears. Whether the "sick noise" on the street is worth the higher maintenance costs, that's personal preference.

 

is mfactory working on anything in the near future?

 

My car has the syncro gear's.

 

I don't think there will be any more wear on the dogs than there would wear on syncro teeth if driven properly.

 

They have a S2k syncro box and they don't have a b-series one yet?

 

It's not about driving properly, it's about how many times you need to physically shift gears.

There is a reason why Synchronous engagement is used on a Street Car, and there is a reason why dog gears are called "Crash Boxes".

 

I cant imagine driving a dog box on the street.

 

Can you qualify this? From my knowledge (albeit limited) a dog box would be a poor choice on the street, if for no other reason that the # of required shifts would exceed what the box was designed for.

Clayton

 

How did you like the syncro gears? i assume they were ppg? Did u get the chance to abuse it at the track?

 

No more than anyone can prove that it's a bad thing.

You have to understand how a dog engagement gearset works, and realize that the actual engagement of the gear, the movement of the shift lever, has to happen quickly to avoid the dogs from 'crashing' on the corners. When the dogs 'crash' and the corners hit each other w/o engagement, it wears the corners down, much like a syncro wears down when shifting fast.

Each box definitely has it's advantages, you'll never see a street car sold from the dealer with a dogbox. You'll also never see a high end race car with a syncro engagement gearbox.

The reality is that many of our cars more closely mimick race cars than street cars.

I'd rather have a gearbox that will take a bit of extra precaution being shifted at low rpm when cruising around then something that's not going to take high rpm shifts well for long.

I guess what i'm getting at is that if shifted correctly (quickly) when driving around town, I don't think there will be any premature wear on the dogs.

 

Why is that?

 

I think I understand (as well as most) how a dog engagement box works. The issue I have with driving one on the street is that most people aren't in the right mindset to drive that way on every shift.

The issue that I have with trying to use one on the street, is simply the wear and tear that would occur. Unfortunately, most if not all of us wouldn't be able to shift quickly enough on every single shift to prevent premature failure. I'm not saying that it isn't possible to do it, just that it likely isn't the best idea.

I know a guy that drive for 2 years in a car with a 4 speed gated shifter that could only be downshifted when at a complete stop. It was cool for awhile, but he drives the car a lot more and actually enjoys it now with a regular shifter in the car.

 

 

I've driven my dog box on the street. I dont find it to be too bad. Just be quick on the the shifter like tony said. I find it no hard to down shift then any other trans.

 

most motorcycles are dog engagement

 

How many 100k bikes do you see running around every day?

For a car that has limited street use it would be fine. More than that just depends if 4k+ is disposable to you or not.

 

If you're making the power to need an aftermarket gearbox, then it's not about the money. We're not talking about putting something like this on a stock car or a car that doesn't need stronger gears.

And at that point, you're not getting 100k out of a dogbox, a syncro box, or a motor...

 

I know how a dogbox works, and I also know how a synchro box works, and if you think you can shift "without" the dog teeth on a dog box hitting each other at least once in a while (especially when street driving), you are sadly mistaken. You can't even do this on a full Race car, as already evidenced by a lot of people who run dog gears. As I said, it is called a crash box for a reason.

Have another think about exactly how a dog engagement works, and ask yourself why the dog teeth on a dog gear set are flat instead of pointed.

For the synchro engagement, fast shifts (or slow shifts) for that matter don't wear out the dog teeth. Infact, it is not even the dog teeth that wear out first on a synchro box. Wear on the dog teeth is a symptom, not a cause. Again, there is a reason why synchro boxes are used on a street car.

If maintained/clearanced properly, a synchro gearset can last a lifetime (or until the gear teeth break), no matter what power you put through the thing. Obviously though, no one is going to rebuild the transmission on their street car every few days, just like how most Racers wouldn't even bother rebuilding their tranny every few races.

Edit: I don't want to turn this into a war of words, so I'm just going to leave it be. Everyone has their own opinions, and the above is mine

 

i work on a roadracetrack where we let people drive lamborghini's, porsche's, aston martin's, bmw's and formula cars.
these people pay 300-400$ dollar and get a whole day fun on the track.

back to the point i want to make....

some people are carminded, some people got it as a gift and some people have there day out with collegeuas.

99% of these people can't drive and some of these people should not be allowed to drive on the road it's scary to experience first hand how bad the regular driver is

at any day (60-70 days a year) there are ~150 people driving these formula cars. each formula car get's driven about 20 times a day by inexperienced (read: incapable) drivers for 2-4 laps. that's 100-200miles a day.

and now comes the catch......
10 of these 20 cars are 1973-1979 formula fords (140bhp) with a dogbox, 6 more are 90's formula OpelLotus(200bhp) with dogboxes.

these cars have been used for this purpose for more then 10 years and offcourse they require maintanance, but most of these parts are 30some years old and i never have much trouble driving/shifting them

you just have to be decicive when you shift