Spat Power Steering Belt With New Ross Tuffbond

[Piggaz]

...you know.... that hurts a little. I brought it on myself, but still.. where's the love.

Only ever seen photos and videos of Gav launching... Wheres yours Matty?

[R32 TT]

Only ever seen photos and videos of Gav launching... Wheres yours Matty?

...everytime I do it - I throw a power steering belt....

[kitto]

Torque figures above look right but I'd have to check my book. GTR would be tighter due to the metric superfine thread it uses (18x1.5) and the fact it's an 18mm bolt instead of a 16mm bolt in the 'lesser' models.

Remember boys and girls, it's all about correct tension, not lots of tension.

That 18mm bolt is definitely doing to need that much torque to apply the correct stretch to give it the exact preload it needs to never come off.

I've seen too many come loose recently....but come to think of it....all GTRs

The torque figure for an RB26 harmonic balancer bolt seems a little excessive... But its what the manual says.

The Torque figure for the 'lesser' models just doesn't seem like enough IMO.

my mechanic just got me a new r34 balancer through nissan for just over 400 buks... Cheaper then aftermarket

http://www.kudosmotorsports.com/catalog/nissan-harmonic-balancer-genuine-nissan-skyline-r33-r34-gtr-rb26dett-p-940.html

R33 and R34 GTR $421..

[800KD]

http://www.ebay.com.au/itm/Nissan-12303-24U01-OEM-Crank-Pulley-Harmonic-Damper-RB26DETT-R32-Skyline-GTR-JDM-/150818128174?pt=Motors_Car_Truck_Parts_Accessories&hash=item231d76012e#ht_500wt_922

R32 gtr genuine Nissan crank pulley $170 usd . Once again Nissan Australia is ripping us off!

Edited July 2, 2012 by 800KD

[The Dan]

So the question on everyones lips (or mine) is what exactly makes them shit?

I can understand that newer designs/materials etc could make a better one - hence why I bought an ATI in the first place, but I am interested in why you say that - how does one 'measure' how well one damper is compared to another without some pretty special equipment?

ie something in your experience must have lead you to this?

Yes, I took a balancer off, turned it around and saw it had cracked through 90% of the rubber damper and thought to myself....ohh, that's shit. I'd better replace that shit balancer

They aren't shit due to material/design. They are shit due to age. Rubber doesn't last forever and when people realise that half the reason they are breaking oil pumps or damaging engines is due to their stock balancer, they will all start running out to buy one. Sean revs his GTR to 10k, 600hp at the wheels and drives it like a stolen VL. Still going 2.5 years later......but then again, he can tune good too

[R31Nismoid]

If you could pick only 3 things to modify in the engine of a GTR to make it near bulletproof at 600-800hp it's : 2. Billet oil pump gear 3. Good aftermarket harmonic balancer

We have proven it many many times.

This is what I’ve always found interesting point of discussion

I have neither of the above on any of my motors in the last 8 years (3 now). Nor do most others down here, with plenty of cars in the 370-420rwkw range so not just luck, all see regular track work with 8200-8400rpm limit and 200km/h+

Never throw belts using OEM Nissan. Gates ones were causing problems and also Daikin (I think?? going back a few years now when i spat 2 of them in 100kms).

(I’ll find out if new Nissan balancers get used in the builds, I suspect the answer will be yes)

[sky30]

r31nismoid- be keen to see if they used new nissan balancers

[tricstar]

...you know.... that hurts a little. I brought it on myself, but still.. where's the love.

Well to be fair, the only event we competed against eachother in, you beat me convincingly.. so... feel the love

[sky30]

What is different between r32 gtr and r33/34 gtr ballancers, they arr listed as different part numbers??

[kitto]

Only difference between the R32 and R33/R34 GTR balancers is the offset of the power steering pulley.

The power steering pulley R32 balancer protrudes a little further.

If you have an R32 power steering pump (hydraulic Hicas) Then you must use an R32 balancer.

Using the incorrect balancer for a specific pump will cause belts to be throen as the pulleys are mis-aligned.

[sky30]

Only difference between the R32 and R33/R34 GTR balancers is the offset of the power steering pulley.

The power steering pulley R32 balancer protrudes a little further.

If you have an R32 power steering pump (hydraulic Hicas) Then you must use an R32 balancer.

Using the incorrect balancer for a specific pump will cause belts to be throen as the pulleys are mis-aligned.

Do you know how much further the r32 gtr comes forward compared to r33/34?

R32gtst pump/ bracket sits 10mm further back than r32 gtr

[kitto]

Its not much. Only about 7-8mm from memory.

[BMYHOE]

i been using the new Ross Balancer on my 2530 i havnt had any p/s belt dramas

[abr33]

I have a theory.... Might be incorrect... but,

talking to the bloke that blue printed my crank, he said to bead blast the coating off where belt runs, and machine the front lip down... Apparently it will help alot.

Does make sense, see old machinery uses a flat belt drive (1920's) and the belt climbs to the highest point on the roller/pulley, so I figure the tall lip actually works against us in making the belt climb up it, so try this I will...

Does it have to be oem nissan or a standard gates one or the like?

And How tight helps for p/s belt? normal tight or uber tight?

[MrStabby]

The torque figure for an RB26 harmonic balancer bolt seems a little excessive... But its what the manual says.

The Torque figure for the 'lesser' models just doesn't seem like enough IMO.

To illustrate what Dan was saying, here's a table that shows how bolt class, thread pitch and diameter effect required torque. Notice the effect of lubing the thread, so pay attention to whether the shop manual is instructing you to use engine oil on the bolt (eg flywheel bolts),

http://www.cncexpo.c...ltTorqueNm.aspx

[STATUS]

This is what I’ve always found interesting point of discussion

I have neither of the above on any of my motors in the last 8 years (3 now). Nor do most others down here, with plenty of cars in the 370-420rwkw range so not just luck, all see regular track work with 8200-8400rpm limit and 200km/h+

Never throw belts using OEM Nissan. Gates ones were causing problems and also Daikin (I think?? going back a few years now when i spat 2 of them in 100kms).

(I’ll find out if new Nissan balancers get used in the builds, I suspect the answer will be yes)

the japs said to me years ago, good balancer number one priority.. New oem at minimum and a really high rev limit (8800 if you look at any jap remap or decent shop tune) so you dont hit it accidentally... problem is here plebs seem to think the rev limiter is a gear change light... so its not that easy

[kitto]

the japs said to me years ago, good balancer number one priority.. New oem at minimum and a really high rev limit (8800 if you look at any jap remap or decent shop tune) so you dont hit it accidentally... problem is here plebs seem to think the rev limiter is a gear change light... so its not that easy

This man, he knows!

[sky30]

the japs said to me years ago, good balancer number one priority.. New oem at minimum and a really high rev limit (8800 if you look at any jap remap or decent shop tune) so you dont hit it accidentally... problem is here plebs seem to think the rev limiter is a gear change light... so its not that easy

So what ballancer do the japs recommend or use as prefference.?

In regards to rev limit, do you mean set it real high so you dont hit it?

What happens if you manage to get it to spin to the higher limit, wouldnt that be worse?

Edited July 3, 2012 by sky30

[Piggaz]

Another option is to pull a whole heap of timing out a few hundred RPM before the cut. That way if you do it it, it's not 'as hard'.

Oorrr just don't be a muppet and avoid it anyway.

[kitto]

Hitting rev limiter is not good for an engine. Hence why the japs set the limit so high so that the chances of hitting rev limiter are lower.

Does anyone know the thread size, pitch and tensile grade of the harmonic balancer bolt for an RB25?

Who uses loktite to do these bolts up. I know the manual makes no reference to using a lubricant on the thread when torquing nor does it say to use loktite.