Forums/Z31P/z31-performance-upgrade-forums engine-mechanical-aa/Ross MetalJacket Harmonic Balancer
Imported from Z31Performance.com Forums{{#if:dbruce| — original post by dbruce}}{{#if:2009-10-20 05:27:44|, posted 2009-10-20 05:27:44}}{{#if:27| · 27 post{{#ifeq:27|1||s}}}}{{#if:/Z31performance_archive/forum/z31-performance-upgrade-forums/engine-mechanical-aa/8662-ross-metaljacket-harmonic-balancer.html|
Local archive: view archived thread on dev.z31library.com}}
dbruce: (2009-10-20 05:27:44)
I have a Unorthodox Racing crank pulley that I haven't been able to use since I have all serpentine belts and I really am not up to swapping over to v belts…
Found this at the Ausie forum :
http://www.aus300zx.com/forum/showthread.php?t=251249
Finally available special order to stat with lighter alloy and steel crank pulley WITH harmonic balancer
~600Au
http://www.rossperformanceparts.com/met … cers.html#
METAL JACKET Harmonic Balancers / Crank Pulley Dampers
A World First In Balancer / Damper Design !! Encased Dampener Within Balancers
Introducing a revolutionary development in torsional dampening technology. Utilising the ROSS Tuffbond original elastrometric bonding process to produce the ROSS Metaljacket® series harmonic balancers / crank pulley dampers.
360 timing marks at 1° intervals
Adjustable timing disc, for TDC accuracy
Precision CNC machined 40 Tonne tensile alloy steel hub and vibration dampening ring
Dampening ring and hub permanently bonded together on TWO axis by our exclusive Tuffbond elastrometric bonding process, ensuring maximum harmful vibrations are absorbed.
balancer is anodized for durability and appearance
Absorbs more damaging torsional harmonic vibrations
Quicker engine acceleration
Increases engine life
Lifetime warranty, even for racing use - a world first!
Never requires maintenance or rebuilding - ever!
Rated to 1500 HP
Encapsulated MetaL Jacket® design exceeds AN DRA and SF1 i8.1(USA) requirements
Fits standard or modified engines
Affordably priced
NISSAN 306220 METAL JACKET HARMONIC BALANCER - VG-30
NISSAN 306240 METAL JACKET HARMONIC BALANCER - nissan vg30 v6 10% u/d w/pump & alt
http://z31.com/wiki/doku.php?do=export_ … c_balancer
Harmonic Balancer Information[edit]
Because of the different years and engines, there were four different harmonic balancers used on the Z31's VG30 engines. Below is a chart to help determine which one you want to use.
^ Year ^ Engine ^ Aspiration ^ Part Number ^ PS Pulley ^ AC Pulley ^ H2O/Alt Pulley ^
| 1984-1986 | A/B Series | non-turbo | 12303-V5020 | V-Belt | V-Belt | V-Belt |
| 1984-1986 | A/B Series | turbo | 12303-V5320 | V-Belt | V-Belt | micro-V |
| 1987 | A/B Series | all | 12303-F6100 | micro-V | micro-V | micro-V |
| 1987-1989 | W Series | all | 12303-21V10 | micro-V | micro-V | micro-V |
You can use the A/B series balancers on the W series crankshafts if you get the spacer from Nissan (p/n 12308-V5321).
You should be able to use a W series balancer on an A/B series crankshaft if you get a slightly longer bolt with matching threads.
Taris Blue: (2009-10-20 12:25:05)
I think and organized group buy may be in order with this one…it's something I've been looking for since about 2005. Nice find!
ARSpeed: (2009-10-20 12:38:11)
Well i am at the point in my rebuild where this would be good.
600.00 AUD = 557.013 USD
Idk haven't bothered to look into lighter pulleys, underdrives, etc.
Group buy. I'd be interested, if i have the funds. Waiting to see what bartco comes out with.
+1 nice find
zmech: (2009-10-20 14:05:26)
0
tcfs: (2009-10-20 16:45:42)
I'm pretty sure that pulley is for a VG30DE/DETT.
Reasons for saying this:
1. On the site, it is listed simply as for the VG30. This usually means the VG30DE/DETT because it is more popular and has a larger aftermarket.
2. The diameter of the alt/waterpump and ac belt lands look be the same size in the picture. On stock VG30E/ET w-series crank pulleys the alt/waterpump pulley land is noticeably larger in diameter.
3. All the guys on that forum have pictures of Z32's as avatars. So more than likely they all have Z32's and are looking at a crank pulley for a Z32. I didn't read all the way through the discussion on the forum, but I believe the forum is for Z32's.
Done.
dbruce: (2009-10-20 17:25:17)
If it sounds to good to be true… prob is… they do make dor the RB- series
Like the ATI damper spec's VG30 but it's VG30DE:
http://www.importpartspro.com/aticrpudani3.html
Other possibilties:
BHJ make the L-series dampers for Robello - no VG30E damper:
http://www.bhjdynamics.com/index.php?ma … hs2s668031
Sorry for false hopes…
ZFast88Z: (2009-10-20 22:11:50)
Because its SFI approved, and some of us NEED to find an SFI approved harmonic balancer/crank pulley....Or pay off the track inspector.
jn1cz: (2009-10-20 22:31:33)
[quote]dbruce wrote:
One of the guys from BHJ posts at HZ. I PMed him about a z31 damper but he never responded. I posted in the Bartco thread at z31.com and he didn't respond either. Fuck 'em…do it like z31 parts have always been done..do it yourself or go to a good automotive machine shop and hand over a z31 damper and your credit card and tell them what you want.
Careless: (2009-10-21 03:54:23)
that is definitely a VG30DETT balancer. look at the spacing of the pulley sections and the number of ribs per pulley, and compare to other vg30dett pulleys.
This works with the VG33 crank snout diameter.
SATAN: (2009-10-21 04:09:14)
There is just one problem with that. The only reason for getting this is because they are SFI approved. A regular machinist cannot sfi approve anything.
jn1cz: (2009-10-21 19:48:48)
[quote]SATAN wrote:
One of the guys from BHJ posts at HZ. I PMed him about a z31 damper but he never responded. I posted in the Bartco thread at z31.com and he didn't respond either. Fuck 'em…do it like z31 parts have always been done..do it yourself or go to a good automotive machine shop and hand over a z31 damper and your credit card and tell them what you want.
There is just one problem with that. The only reason for getting this is because they are SFI approved. A regular machinist cannot sfi approve anything.
And a company like BHJ can ? I thought only the SFI foundation could give SFI certification. Seems like you or the machine shop could apply for certification. I don't think that most z31ers are concerned with SFI certification anyway. You and ZFast88Z maybe.
All I wanted was a lighter damper w/ trigger wheel provisions. And that didn't have chips missing, cracks etc, I could have bought a new Nissan damper and had it machined for a trigger wheel but the price would have been close to the dampers posted and it wouldn't have been any lighter.
MachZ: (2009-11-23 21:01:58)
I believe ATI does have a damper that would be compatible for our smaller crank snouts. If you loot at this page: http://www.atiracing.com/products/dampe … nissan.htm you'll see at the bottom they list V6 engines with one having a snout diameter of .980", which I believe will work on the smaller VG30E snouts. Someone might give them a call and see if they can work something up for you.
Tech@EPR: (2009-11-24 01:56:29)
The ATI damper for the VG30 is for the DE/DETT models. I worked with ATI in getting those done and the project rolled over to BDE out in Washington. He came out with the first batch. They are pricey but the benefits are quite substantial. I can have ATI make us true VG30E dampers but they require an order of 10 to get any type of discount. I can send them a crank for them to build off of as well.
260zturbo: (2009-12-06 04:50:36)
this would be interesting guessing they would have to make one for the a/b and w series
MachZ: (2009-12-07 23:40:02)
Not the VG30 one, its under that listed as V6 with .980 crank snout.
SATAN: (2009-12-09 05:32:05)
[quote]MachZ wrote:
The ATI damper for the VG30 is for the DE/DETT models
Not the VG30 one, its under that listed as V6 with .980 crank snout.
Well, I just measured my snout at .987" on my A/B series engine. That's gotta be the right one… right?
What the different snout diameters between A/B and W series?
EDIT: I just emailed them. Waiting to see what they say.
Careless: (2009-12-09 16:06:21)
I believe the diameters are the same, but the lengths differ due to the added woodruff keys.
VG33 is larger and is as large as the Z32 engines.
SATAN: (2009-12-10 02:28:52)
[quote]Careless wrote:
Well, I just measured my snout at .987" on my A/B series engine. That's gotta be the right one… right?
What the different snout diameters between A/B and W series?
I believe the diameters are the same, but the lengths differ due to the added woodruff keys.
VG33 is larger and is as large as the Z32 engines.
Hmm, wonder if the snout section of the ATI damper can be shortened by them. I'm sure it can… for a fee.
Careless: (2009-12-10 02:50:34)
[quote]SATAN wrote: [quote=Careless]
Well, I just measured my snout at .987" on my A/B series engine. That's gotta be the right one… right?
What the different snout diameters between A/B and W series?
I believe the diameters are the same, but the lengths differ due to the added woodruff keys.
VG33 is larger and is as large as the Z32 engines.
Hmm, wonder if the snout section of the ATI damper can be shortened by them. I'm sure it can… for a fee.
What are you trying to fit the damper to? A/B or W?
even if it's for a W and if ATI can't modify it for you, you can always bring it to a machinist to match the height of the stock damper when resting on the outermost ring. Then you'd have to run your accessories from W series engines because of obvious reasons.
But there goes the "guarantee" they have on their products if you do that.
SATAN: (2009-12-10 03:17:35)
It would be going on my A/B series. I don't know what the hell the guarantee would be on a racing product anyways… "We guarantee it wont explode maybe?"
Tech@EPR: (2009-12-10 04:51:56)
do you guys need help in dealing with ATI? Im a dealer for their products. I can have a VG30E damper made but they require to have a minimum of 10 orders to do a run before they will build these as an "off the shelf" item. ATI dampers have an interference fit by design. They don't slide on like conventional pullies, in the manner of just sliding on. These dampers need to be press fitted on. You can purchase an install kit but I've always used a blunt fitting that I can use to hammer the damper onto the snout.
Outside of that…what exactly is different between the A/B and the W series? Are the crank snouts the same? or is it just the way the accessories are ran in configuration? Either way I can have ATI make either or. The biggest thing is the development of the snout hub. Thats what bolts into the damper itself. Depending on the setup of the damper ATI configures it to have rates of 600hp (street) and 1000hp (race). Both have different OD/UD percentages based between the two models.
If you guys are genuinely interested in getting something like this done let me know. I know i've mentioned this item before in other threads. Its one of the best investments an owner can make when building or having their engine built.
ZFast88Z: (2009-12-10 04:55:24)
And now you killed the SFI cert.
SATAN: (2009-12-10 05:02:52)
The difference is that the W series has the longer snout with two woodruff keys, as apposed to the crappy A/B series where there is just one key that the belt gear and the balancer have to share. If the diameters of the snout are different or not, I don't know for sure. I'm sure the info is here somewhere if one were to search.
Careless: (2009-12-10 05:09:39)
[quote]ZFast88Z wrote:
[
you can always bring it to a machinist to match the height of the stock damper when resting on the outermost ring.
And now you killed the SFI cert.
good point.
Careless: (2009-12-10 05:19:55)
[quote]SATAN wrote:
What are you trying to fit the damper to? A/B or W?
even if it's for a W and if ATI can't modify it for you, you can always bring it to a machinist to match the height of the stock damper when resting on the outermost ring. Then you'd have to run your accessories from W series engines because of obvious reasons.
But there goes the "guarantee" they have on their products if you do that.
It would be going on my A/B series. I don't know what the hell the guarantee would be on a racing product anyways… "We guarantee it wont explode maybe?"
well. yeah. exactly that…
their balancers shouldn't fly apart if they're more than one piece. and as ZFast88 just mentioned, they are certified so that their construction dictates that under the uses outlined in SFI 18.1 certification (I think it's 18.1 for balancers or flywheels, can't rememeber) it should hold itself together. It's like an ISO Grading of metals, except this is final product quality… so that's somewhat of a guarantee, isn't it?
shanegarr: (2016-03-01 16:22:43)
Did anything ever come of this? It's 2016 and I've been looking for a balancer for a long time lol
floridaZ: (2016-03-02 05:17:37)
You can use Z32 units. At least, with a VG33.
The Walking Thread.