my sponsers product i took this from work today

in todays world of trying to build a better mouse trapot much has happ in the world of drive shafts. the drive shaft shop is proud to announce the intro of techna-pulse a revolutionary new process. what we can now do is attach aluminum to steel (remeber all the old jokes)now, how this is achieved is the steel part is slid inside an aluminum tube and an electro-magnetic pulse is shot around the part, this is notcrimping or glueing affect but a complete molecular bond with out anny affected heat zone(like with welding)means the aluminum tube will be stronger (remaining t6) now that we have the techno stuff out of the way wut does this mean to the automotive world?

first thing that come to mind is a 4x4 shaft that will be able to have a spline and a slip yoke made of steel or chromoly and have the benefits of the aluminum tubing, there are also many benefits in sport compact world that will be a welcomed advantage,cars like the s2000 or a sudi a4 will bill be able to have the cross grove cv ends made from chromoly and the center tubeout of aluminum, these shafts would be lighter,more torsional, and be able to be made in a single shaftconfiguration instead of the factory 2 pieces. we are also desighing a single shaft for the mitsu evo 8. the prob with making a shaft for a awd mistsu is that the u joint operating angles are not proper for the correct cancelation, what will be produced is a one piece shaft with a u-joint (larger than factory greasable) int he front and a cross groove style c.v in the rear (using the techna-pulse on a chromoly spline) the shaft will not only be about half the weight it will add throttle response and increase rotating efficiency tremendously, over the comming months this concept will be developed to bring u some of the most cutting edge drive train products

we will be putting my z on the lift this week and start fabrication a shaft for the z

 

bump

 

I assume that you mean a drive shaft. The Z has a very strong, light weight carbor fiber drive shaft. Why would one want to replace it with a heavier steel/aluminum shaft?

 

I was thinking the same thing, but didn't want to sound stupid, so I stayed away. At least I'm not the only one wondering.

 

has anyone snapped a stock driveshaft yet? For an AWD car, yes, its a nice mod for those running huge HP numbers. I ahve yet to see any RWD car, short of some very high HP supras, need it yet.

But, DS Shop makes some nice stuff...w ahve dealt with them before.

 

we are measuring tomm for the shaft all i know is im gonna be the test car.

 

Enjoy your decreased performance!

 

Yea, increasing rotational mass is really a good way to get the most out of your car. I was thinking about fabricating a lead flywheel but some friends talked me out of it. I'll be installing my tungsten flywheel next week.

In all seriousness, there are supras out there putting down 600-800 whp with their stock driveshaft. It would be safe to say that the stock clutch in the Z will let go before you start snapping driveshafts. I'm not sure what the benefit of this mod would be, if any at all, considering it would take many thousands of dollars for a Z to see 600whp, and even then, it might not need a better driveshaft yet.

 

I saw this "welding" process a few years ago. A spinoff of an well known aerospace company was trying to market this to other industries. It's been used in aerospace driveshafts for a few years.

I have to agree with the weight and strength comments. I don't see the bennies over the CF driveshaft, infact a well engineered CF driveshaft will always be lighter weight for the same strength aluminum shaft and will usually be stiffer.

 

2 things-

1, if a carbi shaft was the best why wouldnt all cars have it
2, my shop makes shafts for professional drivers personaly i dont know the benefits of the diff drive shafts, if you would like to know why this new shaft is better contact them.
www.driveshaftshop.com

 

1) Because they're expensive. They are a hugely popular aftermarket upgrade. Look at road racing cars and you'll see what's up.

2) Just because something is right for a certain "professional" doesn't make it right for everyone. If that certain pro is running 1000+ hp, then yes, this is probably a good product to consider. If you don't know what the benefits are, why are you doing it??????

A lighter driveshaft means less rotating mass, which yields quicker acceleration. In general, you want the lightest driveshaft that will take the torque you use it to transmit. You also want stiffness. Carbon fiber can give you both of these.

 

Carbon composite driveshafts are expensive and would affect the bottom line for an automobile manufacturer by causing them to cut profit margins or raise prices (and indirectly cut profits by losing sales).

What most people are trying to tell you is that, in your situation, this driveshaft will not be better at all, but will actually be worse. You're never going to have the power to snap the carbon driveshaft in the Z, therefore there is no point in changing it out for a heavier part. Maybe some professional drivers need that performance because:

1) Their car does not have a strong stock driveshaft, or
2) They are making enough power to have the need to bulk up the driveshaft.

There are a million mods you should look into before you slap a new driveshaft on there.

 

im getting it for free so i could care less, and i was just trying to inform everyone of a drive shaft available and people jump down my throat geez now i know where the bad comments about thsi web site come from

 

Dude, nobody jumped down your throat. I don't see anywhere where anyone used an offensive tone. You brought up a mod for the 350Z while stating that you don't know anything about it, and we informed you about it.

No attacks or insults, just information. Read it again.

I would recommend, after they get their R&D done using your car, that you put the original driveshaft back on. It's your car though -- do what you want with it.

 

I have never seen any data from Nissan or outside sources touting the weight and performance benefits of the 350 stock "composite" driveshaft. I have seen generic boasts that composite driveshafts are inherently lighter and possibly better in torsional characteristics. However, it seems Nissan is more content to promote the safety aspects of the stock "composite" driveshaft stating that in an accident it would shatter rather than becoming a javelin.

While composite driveshafts have the POTENTIAL to be lighter and have better torsional characteristics then their steel, aluminum, or even titanium counterparts, that is a far cry from claiming composites are better across the board. With the infinite possiblities of material and resin and maufacturing processes that can be used for composites, it would be extremely naive to dismiss other options without seeing test data. I'm sure Nissan has conducted sufficient tests to justify installing the part, but should their solution be considered optimal? I seriously doubt it. Composite material property charecteristics are so costly to determine that it opens the door to many other solutions. In light of Nissan's reluctance to share numbers, we have to assume that the performance benefit is marginal or they are protecting their research. I assume it's a little of both.

 

Yes, the benefits would be marginal no matter how great the driveshaft is. The rotating mass in a driveshaft is so close to the axis of rotation that you're not going to see a huge gain from a driveshaft upgrade. It's just part of a complete breakfast, if you catch my drift.

It's not that big a deal to determine the properties of composite materials. I did 3 years of research on composites in engineering school and taught the lab section of the "Mechanics of Composite Materials" class, where we did just that.

 

The difference between engineering school and the the real world are that school tests dont have to show a profit. Additionally, to certify a material for production use one cannot just make a test specimen, break it, and say the material has XX ultimate strength (or whatever). Many more specimens are needed to determine its fatigue strength, its bearing strength, how close you can put fasteners or holes to its edge if so what size and how many? Was the failure due to the material or were their voids created in the manufacturing process? The possibilites are truly endless, time consuming, and cost intensive. Doing tests for NASA has truly opened my eyes to the true cost of composites research, and the endless possibilities that composites can offer - however, who's paying for tests? The companies that invest the money dont like to share.

Edit: more reasons why composites research costs so much is the need to test the material in tension, compression, torsion, bending, bearing, shearout, fatigue, possibly even damage tolerence and impact loading. Multiply those failure modes times the number of different combinations of material, resin, and manf processes and you can see the variables are astronomical.

 

Hey Phil, this is probably not the best mod you can do to your car..You dont really need a stronger drive shaft and why replace it with a heavier on that may not be as well balanced..Free or not I would pass on this mod and see about beefing up the clutch instead..

 

this is true

 

ps...How is the N2O install comming along???My buddy is still selling his SC $3800...