It depends on what component you're talking about. If it's the exhaust, there is some power to be found, but lowend power and throttle response may be impact as well as the NVH increase. Some people can deal with the side effects of the power gain. Then there are things like the driveshaft. Nissan clearly saw a safety and/or fitment issue with using a one piece driveshaft. Nissan has very expensive machines and fancy engineers to tell them what is the ideal design compared to a "shop" that knows they can make something fit, but doesn't necessarily know why the OEM part was designed the way it was.

IMO, people put way too much faith in these lightweight driveshafts. It is your money though. I had a 94 Z28 and the OEM steel driveshaft had a pretty bad vibration at 75mph. I suggested that they try the 1LE aluminum driveshaft that was used on the 96+ SS. To my amazement, GM installed it . The vibration disappeared and I got a 15lb lighter and stronger driveshaft. On the dyno, it was worth a mere 2whp

 

those pix were the one i was talkn about... oh and as for the 2 piece design..its to soften the driveline.. well thats the reaso ford did it with the mustang.. my stangs piece weighed in at 46lbs.. driveshaft shop made one that weighed 18lbs.. it also converted it to 1 piece.. their shaft makes your car stronger and ford has noticed.. so have saleen and rouche.. so if there is something small in the way of a one piece for the G35 coupe.. move it if its not vital...

 

yep, Nissan did a great job in the design of the slope on the plenum ...

There are many things that are able to be better on just about any car... My sole purpose of this car is performance... I don't care about smooth shifts, cushy comfort ride, or anyting else that the sedan was designed for... initially when I bought the car those were the reasons - but needs have changed.

If I hadn’t already put so much time and effort into this car I'd be in a Z and call it a day.

But anyway - like I said before - I would not destroy my OEM shaft to do the one piece CF (which is why I haven’t done it yet)... if the coupe shaft is the same exact dimensions, I will probably have them make a CF for my sedan... from what has been inspected and reviewed from sources I trust, there shouldn’t be any issues... now that I know a shaft has been designed, detailed measurements of size and angles will be taken to see if this is a viable option.

Having Nissan not make it one piece OEM is not a deal killer for me because they are in business to make a one-stop-shop car that appeals to the masses... and the majority of sedan buyers are not interested in things I am into for this car - so it makes sense that Nissan does different design function.

It will be a while before I even do this - I still have many other projects piling up.

 

the only thing in the way is about 1" each side of housing around the OEM shaft about mid way... its easily cut and modified

 

is that a mounting point you would need to cut away? ie.. cutting it would prevent you from putting the stock one back in?

Interesting project. If it saves a ton of weight, could be good.

 

no, not a mounting point... next time your car is on a rack take a good look - you'll see what I'm referring to... I'll post pics one of these days if I think of it.

This project is so far on the back burner I cant believe I've even spent this much time in the thread... I was real anxious to do it a while back... I'm just glad to see they have made one so now my interest is back.

Can anyone confirm whether the coupe OEM shaft is the same exact specs as the sedan? I suspect not - but I'm hopeful.

 

I don't know why it would be any different. They share the same exact underpinnings, wheelbase, etc. I've got the coupe FSM and the "propeller shaft" looks exactly like the one on my sedan.

 

well im def thinking about adding this to the build sheet then.. more wanting it for the shock absorbtion than the weight loss.. though i will def be happy bout it..

 

+1.

That was the first thing i thought of when i started reading this thread...

-Sean

 

OC - i don't think you understand what he is trying to say. My close friend who works for nissan complains about the drive shafts on the 350z because he has seen countless numbers of them come in cracked and or damaged. If you have a single piece design and the body has flex you run the risk of cracking your drive shaft, which is going to cause a fair amount of damage.

I wouldn't do it.

-Sean

 

ur talkn bout sedans wheel base correct?

 

i just dont see how the G coupe has an 8" longer wheel base than the Z..

 

back seats

 

anyone know how much stock driveshaft weighs?

 

Back from the dead, i'm now looking into this, LOL