Alloy fly wheel torque setting

[Bart]

Hey guys, I got a Fidanza alloy fly wheel from a 300zx, im using this on my VH41.I need to know what torque setting are on the fly wheel to crank, now i know for the original VH45 flex plate its 61 - 69 ft lbs, should I use this or should i use a lighter or tighter setting?Also can it be confirmed this is the correct torque setting for pressure plate to fly wheel? This was emailed to me from Fidanza 25-30 ft. lbs, seems a bit tight for an alloy fly wheel?? I dont want to strip the thread as its 6061 T6Thanks Bart

[craigztoyz]

Fidenza's answer should be correct, as you are installing it, just as it would be on a v6, tightening should be the same, On the stripping it part, that should not be an issue, as the threads are in the crank, and not the flywheel, it is just being pinched between the crank n bolt heads, so there should not be any stripping.

[mtcookson]

25-30 ft. lb. is probably right. That's what the stock 300ZX pressure plate to flywheel is actually rated at (25-33) and, even though its aluminum, I've never had any issues torquing to the stock rated pressure with my Fidanza.

61-69 ft. lb. should also be correct for the flywheel to crank. That is also the rating used on a 300ZX.

Oh yeah... and DXD Clutches FTW! Those are the guys I'm going with for a clutch next. They make some awesome clutches and have incredible customer service from what I've seen so far.

[Bart]

thanks guys

[tmorgan4]

Oh yeah... and DXD Clutches FTW! Those are the guys I'm going with for a clutch next. They make some awesome clutches and have incredible customer service from what I've seen so far.

Agreed...I've got a little bit lighter clutch than Bart is running (stage 2 TZ) but it rocks so far. Can't wait to really try it out. The clutches are VERY reasonably priced too...got mine from Jason @ z31parts.com and he was very helpful.

[mtcookson]

Good deal. Jason is a great guy, has done a ton of stuff for the Z31 community... plus his Z is absolutely insane.

[Bart]

Agreed...I've got a little bit lighter clutch than Bart is running (stage 2 TZ) but it rocks so far. Can't wait to really try it out. The clutches are VERY reasonably priced too...got mine from Jason @ z31parts.com and he was very helpful.

Yeah i hope it turns out to be a good clutch mines a DXD-FX Series Stage 6 for a 350 ZX, my fly wheel has been modified to suit.

[tmorgan4]

I was going to ask you about that...I was about to go with the upgraded pressure plate like you got, but the flywheel had to be re-drilled and I just didn't need the extra holding power for my application. Did you get the flywheel re-balanced after having it re-drilled?

[Bart]

I was going to ask you about that...I was about to go with the upgraded pressure plate like you got, but the flywheel had to be re-drilled and I just didn't need the extra holding power for my application. Did you get the flywheel re-balanced after having it re-drilled?

Yep, you should get it balanced anyway, but yeah, when you get it re-drilled definitely, but then you can buy the fly wheel allready re-drilled ready to go from Southbend clutch.With the 350Z pressure plate it has the advantage of a lighter feel on your foot, not only extra clamping force (apparently) as i havnt used it yet.

[Bart]

Hey guys, one last question i hope on this subject, what did you do for a spigot bush? My 300 ZX bush is too small for the VH41 crank.It seems i may have to make one on my lathe but your opinions would be greatThanksBart

[tmorgan4]

I'd assume spigot bush is what we'd consider a pilot bushing? I'm surprised the 300zx bushing is too small. I had to take some material off the outside of the 300zx bushing to get it into the crank. I had to go through 4 bushings to find that out.

[Bart]

Sorry mate youre right, its a tad too big, yes a pilot bearing, the only thing is the adapter plate pushes the gearbox/shaft out by approx half inch, would i need to make the bush longer?

[Bart]

She looks great from the rear

[craigztoyz]

Which adapter is that? I assume it is a Dixon. Pic looks good

[Bart]

No its not a Dixon, i bought it from Perth Australia. company called AGI

With regards to the adapter plate thickness, what should the length of the pilot bush be?
Modified by Bart at 4:37 AM 4/9/2008

[Bart]

Hey guys i was advised to turn down the pivot bush half way down, and the part which is turned down is tight fit into the crank. Is this what you guys did? I added some lock tight retaining compound.

[Mettler]

Hmmm, on mine I'm actually using an RS bearing (forgot the exact number, 6202 or something), with a small aluminium bush to reduce the inside diameter to suit the spigot shaft on my gearbox.

[Chrispy300]

No its not a Dixon, i bought it from Perth Australia. company called AGI

Modified by Bart at 4:37 AM 4/9/2008

If you don't mind saying, how much was that adaptor plate? I don't know if Wes's plate will ever get made

[Bart]

The plate was $370 delivered approx. The blokes name is Derk, ill pm his number.Mettler in your opinion will this setup be ok?

[Bart]

The adapter plate was approx $370 delivered incl boltsThe blokes name is Derk ill pm his numberMettler in your opinion will this setup be ok? Im paranoid the bearing will fall off or something

[Mettler]

Hmmm I'm not entirely sure what you mean... it isn't clear from your explanation.

It is my understanding that there is a converter pilot bushing in the end of the crank from factory, and that one would want to replace it with a suitable spigot bearing or bush that is a tight fit.

[Bart]

Yep i left the original pilot bearing in the crank, turned down the bronze 300zx bush half way down the length of the bush and tapped that into the original crank/converter bush with lock tight.

[Chrispy300]

From what I understand you are trying to have a longer spigot bearing because you are using a spacer adaptor for the gearbox. Because of this spacer the input shaft for the gearbox will be too short to fit into the crank. Is that what you are trying to do with the stepped bearing?

[Bart]

From what I understand you are trying to have a longer spigot bearing because you are using a spacer adaptor for the gearbox. Because of this spacer the input shaft for the gearbox will be too short to fit into the crank. Is that what you are trying to do with the stepped bearing?

Exacly

[ultrapulse]

Does this mean only half the bush is inside the crank the rest in the breeze? If so I'd engineer some other way. the bush is (or should be) sintered bronze and not very strong, actually weak and porous. If this isnt whats happening disregard my comment.Cheers

[Bart]

half is in the crank, 10mm in the crank, half is kind of in the breeze but the gearbox shaft is in the bearing.

[Bart]

The plate was $370 delivered approx. The blokes name is Derk, ill pm his number.Mettler in your opinion will this setup be ok?

whats ur email ill email Derks number

[Chrispy300]

ce.paterson at student.qut.edu.au

Get rid of the spaces and replace at with @. Sick of spam mail

Don't they have PM's here?

Thanks for that, did it come with those cap head m14 bolts?

[Bart]

no worries ill send the number tomorrow i forgot it at work

[Bart]

half is in the crank, 10mm in the crank, half is kind of in the breeze but the gearbox shaft is in the bearing.

Actually come to think of it, it wouldnt matter too much if the bearing was further into the crank, if i remember correclty their is a shoulder inside the crank which is approx 10mm deep, after the shoulder it opens to a larger diameter so a longer bush would be useless as it wouldn have anything to hold onto??