How will this affect daily driveabilty? Will the RPMs drop quickly between shifts? Will it be difficult to shift smoothly without a lot of jerking? And what about gas mileage? Thanks.

 

Any ideas on lost warranty coverage by making this swap?

 

Should have it in 3 weeks if all the shipping goes well. And i will do a dyno on my car after i get it installed.

Later
Aceman

 

Generally, yes. It's the trade off. Just learn to shift quicker

I'm not sure about the jerking.

I would imagine that gas mileage will get better as you are making a more efficient transfer of power to the wheels.

 

right now, your engine has mass to it, when you shift without revs being the same, you have to quickly jerk the engine to the proper speed, thats the jerk you feel. with a lighter flywheel, you should get less of a jerk, since your accel and decelerating less mass of the engine, leaving the car to continue with a less interrupted speed...

personally I cannot shift fast enough through ever day shifting to not have the revs drop too much unless my RPMs are fairly high.(for racing and really trying, its no problem...) so I have basicly adapted to holding the gas pedal down to the right spot when shifting, and its gotten me much smoother shifts... with this method, I dont think the weight of the flywheel would affect anything, since your not just letting it drop arbitrarily hoping it falls the proper amount for a smooth shift.

 

any more info on this???? Looks a lot better (cheaper) than the Unorthodox racing lightweight flywheel ($800).

 

D_Nyholm


that little guy on the tricycle drifting kicks butt!!!!!!!!!!!!!!!!!!!!!!

 

The JUN flywheel is an excellent piece of work. I had a JUN flywheel on my Type R, and the car was a lot smoother, revved quicker, felt several pounds lighter. Couple this with an ACT Stage 1 clutch and a short throw shifter, and the Type R became a little street monster. I can only imagine what it would be like on a 350Z.

 

Should be here in a week i hope, cant wait to get it installed



Later
Aceman

 

I'm quite interested in results of this as well... keep us posted!!

 

The flywheel will make 1st gear driving a lil hariy too potentially, as your engine braking will be increased with the lower inertia, once you get used to using more throttle to get the car rolling it is not bad and really fun.
In 1st and 2nd you will fly (if you can get traction yes they can make that big a difference) and it makes driving alot more fun, i just got used to staying on the gas a lil longer when i put the clutch in to blip the revs maybe 1-200 rpm and then you dont need to shift faster (daily driving) and for racing it is nice cause oyu get immediate grip but NO chirping of the tires and hence no los of traction (thumbs up in my book)
As far as the dyno, i wanna see a 4th or 5th gear pull that shows a gain, the gain is proportional to the rate the engine accelerates, so in 4th an 5th when the res climb slowly they will not show much if any gain, but in 1st and 2nd an equivalent 20-30 HP is by no means out of the question!

Ben

 

Hmm, very curious. Keep us posted.

 

You hit the spot TJZ. I just want to add something to that:
Its not how much HP you make, its how much HP you can put on the ground. Loss of Hp also occurs in the drivetrain, suspenson, and body flex. An aftermarket clutch will also show Hp improvements on a dyno. Drag race teams(professional) will work with chassis flex to control the transfer of Hp to the ground. Example: most of the weight of a fuel funnycar transfers to the rear at launch, and more to the right rear because of engine torque. So the RH rear is pre-loaded (more weight)so the Hp is gets to the ground quicker:resulting in a quicker launch. Trust me...I used to build( Fuel Funny Cars(320mph+)

f(x)M1

 

Our 350EVO flyhweel is done and currently on the car. We have put a lot of miles on it and everything is working great. We will be selling our flywheel with 2 differnt packages......stock clutch set up or sachs clutch.
For your information the stock flyhwheel and clutch are way more than 27 lbs.

 

What is a Sachs clutch? And why do you need different flywheels for different clutches? Thanks.

 

We will be offer it with either the Sachs 7 inch clutch or you will be able to use the OEM clutch. The Sachs is a high performance/race clutch. No slipping.

 

Sach is IMOP best clutch set up for racing you can get. Its a seven inch clutch. We have been looking at the results form our data...........interesting.....very interesting.

 

A 7 inch clutch is much smaller than stock. So the need for a different flywheel.

A stock clutch is about 10-11 inches in diameter. (guessing)

The smaller diameter the clutch,and or flywheel is, the less "rotating mass" it has.

Spins up faster!

Racing clutches can be pricey........

Scott

 

yes, Sachs makes VERY quality stuff

 

do we have a price on this unit yet?? (sorry, I didn't see it)