Harmonic balancer choices? factory oem failed. so many choices.

[1986.5supra_kid]

2jzge stock block with Aussie and 389whp soon to be on e85 max goal is 600ish.

Anyways the OEM one failed. Didn't know this until my water pump started leaking so anyways there are so many options to go with ROSS,ATI,FLUIDAMPR,and a solid alum which is garbage.

What I have read is the OEM is fine for daily driving and life under 7500k and 700ish HP and lower.

The ati is 15% overdriven and requires a smaller belt? I would think if they made the pulley bigger(overdriven) that this would need a bigger belt? Ati may need machining to fit?

Fluiddampr is same pulley dia. As stock so uses the same belt.and uses fluid vs anti which is rubber bands. And ati is rebuildable.

Ross seems common with aussie's don't know a lot.

As of right now the OEM looks mighty good but I can get a ati today in my hands for $340 were as OEM is $330 maybe $300 if I can haggle parts and service. But I won't have it for 2 days. But the OEM doesn't need a special belt or special tool to remove. So is the ati truly better that stock Toyota enginered part?

 

[GrimJack]

ATI is truly better. With that said, I went with the Fluidampr this time around - had an ATI before, and installation was a pain. I'm much happier with the install on this unit.

 

[IndigoMKII]

ATI is truly better. With that said, I went with the Fluidampr this time around - had an ATI before, and installation was a pain. I'm much happier with the install on this unit.

I've yet to install an ATI damper, what was so bad about it?

 

[1986.5supra_kid]

ati is a TIGHT fit. boiling water for the damper pulley and dry ice on crank snout. yes sand paper was used too.(experience from a friend at a performace shop/parts distributibuter) at least on 2jz motors. but there hit and a miss.hes had a few fit like stock. maybe a diffence in lexus cranks vs supra cranks or ati QC process.

anyhow i think im going with fluidampr so i can keep stock belt and fitment seems to be better more consistentally and apperantally the fluidampr does not wear out. which is questionable but after reading the FAQ on there website im confident in the damper.

 

[scottiedawg66]

People usually hone the inside of the anti unit to get a better fit. I am currently looking into a new balancer as well. Another factor is the larger pulley spins the accessories faster, so it is also recommended to use a larger pulley on the alternator as well.

 

[1986.5supra_kid]

not sure of the best way to hone something with a keyway

 

[nathaninwa]

Ive installed a Fluidampr, no issues to report with 6k miles on the engine.

 

[scottiedawg66]

i have been told to use a standard style hone with 3 stones, i do not recall the size or how what diameter to shoot for on the ATI for honing, but I can look into it. I don't see why a key way would make a difference, I hone 2 stroke cylinders with ports and everything all the time with no problems.

FWIW my information comes from a local fellow who has been building 2jzs for almost 10 years.

he is the premier 2jz builder and tuner that servers the SF bay area so I take his advice as good, but I understand how it sounds over a forum...

here is his most recent personal build.

http://www.supraforums.com/forum/showthread.php?699405-Another-Fox-body-Mustang-2JZ-build

 

[1986.5supra_kid]

thanks for the input guys. im sure the ati maybe superior is some ways but the fluidampr just fell into place. the Ati i was going to buy sold. and a fluidampr is available today for the same price as the ati.

 

[Radial]

Why not just replace the 20 year old wheel with a new one? A new one will last at least another 10 years... :bowdown:

 

[scottiedawg66]

I have been advised to invest in one before i raise my rev limit to 9k

 

[1986.5supra_kid]

After reading 3 hours on dampers how they work and there purpose the difference on price of OEM to aftermarket was nothing to think twice about.
The factory one is designed to factory setups. So let's say you change the cams or something to increase performance. Now the frequencies that the OEM damper are made for are different. I'm not saying its still not doing its job but its not doing as well. Or high revving motor setups.

I didnt know this until reading some post figgie jad on a thread on supraforums that he had invested lots of money with ati to create a balancer for the 7m's

 

[Radial]

The purpose of the harmonic balancer is to reduce the vibrations in the crankshaft, as this damages bearings and so on.
The vibrations on a stock bottom end is the same, no matter what cams are installed.
If you replace something inside the block, to something aftermarket, then harmonic balancer should be re-designed for the new vibrations.

Don't get me wrong, it's wise to change out an old harmonic balancer. But installing a solid one is not good for the crank bearings over time.

 

[1986.5supra_kid]

the good news is the fluidampr is not solid like the driftmotion alum one. it does have dampening properties. much like the ati model too.