I was very skeptical of these dampers actually being effective until I ran one on my built EJ25. I cant believe I didn't end up with one sooner. With a properly balanced engine the effect is even more noticeable. Revs felt much smoother and shifting was hugely improved at higher RPM. this was coming from an aluminum pulley with zero dampening ability. Stick with your OE pulley until you can get a fluidampr or ATI pulley. Fluidampr is set and forget which makes it ideal for %95 of us using these on street cars. The big thing you'll notice is how heavy the fluidampr is but it absolutely does not make the engine lethargic.

Fluidampr was the best thing I did to my old EJ25. Smoother shifting, easier to started on hills, much smoother throughout the rev range.

I know this isn't the thing on this channel, but I think we'd all appreciate seeing/hearing some shop cars, maybe a little tour through the builds. I love the technical details, never a bad time to learn something!

Welp.....this is just great. I had to pause this video about half a dozen times to look up terms these guys use. This is both a compliment to Mike and guest and a non compliment to my meager vocabulary.

I'm cleaning a carb while I'm listening. And this spokesman sounds like Dan Aykroyd . Very informative, thank you

This videos are the boom! Love hearing engineering at its best, not from clase room but from year of experience! Love this videos!

One of the best car channels on KZfaq! Thank you for your hard work. Waiting for more great videos!

Haha Mike struggling not to upstage homeboy is great. Dude is literally an encyclopedia

I always learn so much from MotoIQ!!

Awesome video with a lot of detailed information on how these harmonic dampers mitigate internal twist. I've got a fluidampr (and no balance shafts) on my Evo, wish I had done the fluidampr from the start

excellent info & demonstration! keep up the good work guys.

Mr. Kojima you sir are a living legend! Thank you for sharing your wisdom over the years.

Thats so cool to hear you guys worked on Dai Yoshihara car. I got to meet Dai at WBM 2023 this year. That turbo ls7 brz is absolutely amazing. And he’s a super chill guy, very approachable and willing to answer questions. We also got to see him drift around the track for a good hour or so. Totally awesome to see that level of driving skill in person.

I decided on an ATI for my Whipple supercharged Gen 2 Coyote and I rev it out to 7600 all the time very smooth and loves the revs. However we just built my 2007 LBZ Duramax using the Fluidamper and I love them both. I love the fact that I don’t ever have to rebuild the fluidamper so I’ll be switching out my ATI instead of rebuilding it to the fluidamper.

Great video! Really learned a lot from both of you. Appreciate the insight as always

just bought a fluidampr for my sti. thank you for putting out this info

Appreciate the cross examination between the Fluidampr & ATI damper

thank you for your video, very informative great to see excellent work your passion for building engines sure is great thank you again

I'm glad that I'm currently using fluidampr on my car. Thanks for the really helpful info

Love this, love to learn always been curious about fluid damper thanks!

Love these types of series !

I bought myself one of these for my honda B series today so thank you both for this video 👍👍

Good show, Thanks!

I've always wanted to know how a fluidampr works. Thanks

Excellent explanation

love the videos. im LEARNED!

Great video, now I'm convinced to go with fluidampr

I really want one of these! Going to need to get rid of my dual mass flywheel soon and it already brings the ruckus with the chatter

Thanks Mike for filling in the gaps for me 😂 I got lost a bit until you dumbed it down for me hahaha

Would be cool if there was one for the Volvo 5 cylinder.

Did i just hear Kojima say "bro"

wish you could put up a poll, several years ago I did my own research and I always thought the technology was better on the fluidumpr vs the ATI. a lot of guys were running the ATI and suggesting the ATI. I don't recall the reasons for going ATI versus of fluidampr . thinking that something to do in tuning the damper for specific frequencies. nevertheless I bucked the trend and went with the fluidampr haven't looked back since or thought about it really. but you never forget how smooth the motor is at high RPMs

I have a bone stock LS3 with headers, an ACT prolite lightweight flywheel, solid hub 6-puck clutch, solid serpentine tensioner, T56 Magnum, and a DR44G alternator. I don't baby the engine. I go through two sets of tires every year, clutch kick it, shift hard, and have towed 70% of the vehicle weight. Ever since new, on acceleration pulls, I can hear a rattle in the transmission from 3000RPM up that matches the engine speed. -- The stock harmonic balancer has started to wobble and at 5 years/80K miles, and it may have done damage to my power steering pump. If the crankshaft snout isn't bent, I'm going to install a "Fluidampr" and see if that calms things down. -- If the crank is bent, I'll use a Fluidampr on my rebuild, which will have a mild cam (228/240-112, .591"/.551"), 3.75" stroke, 6.2" rods, 1.165" flat top JE pro pistons, and a 4.07" bore. -- The fluidampr assembly is nice because it's one piece that does not depend on the strength of rubber to make it run concentric with the crankshaft snout. I'm not too concerned with the weight of the damper because it's small in diameter, so inertia is less of an issue. -- I do suspect two other things: I might need to get a smaller alternator like a CS130D, a larger alternator pulley, and re-consider how I tension the belt. It's always been in the back of my mind, and now here I am with a busted crank pulley.

Great detail

I have one on my built B20vtec motor, definitely a noticeable difference and smoother idle with these big cams

Cooked my oil pump gear on a toyota 2zz engine because of harmonics from installing an under driven crank pulley. These guys speak the truth

Would be great if this was available for sr20 Going from dualmass flywheel to single mass with the CD009 trans has caused some issues Id love to get rid of. Please consider?

What is amazing is all the Toyota aftermarket "performance " stores that push light weight billet crank pulleys- especially for the 4age. The Toyota WSR racers quickly (lightly tuned 4age) learned running without a damper resulted in reduced bearing life. But shops still promote the "performance advantage" of a light weight pulley

I had no idea. Thanks for waking me up.

I got a 2jz on poly motor mounts, adding a fluidampr, no joke, the motor at idle no longer vibrates the interior, the engine runs super smooth and this may be an placebo, but i swear the motor rev's up faster. And with the 2jz you can ask any owner of one, the oem pulley is a ticking time bomb, and for the price of a oem replacement, for a virtually lifetime part, its an no brainer.

Taking any weight of of the rotating assembly will for sure free up HP. It be nice to see these become lighter and lighter but still cushion the harmonics appropriately!

Your forgot to mention Canyon runners 22:22. I beat the crap out of my mostly stock engine 350Z for over 1200 turns on Tail of the Dragon, easily more than an hour ON the throttle at high rpms, just having so much fun! I did it 4x back to back, LOL! My aftermarket brakes and clutch did start to get soft at the very end and I had to call it a day. When I rebuild that motor, which still runs alright at 128k, I'm adding an aftermarket damper.

🥳😎 Awesome job.

Interesting that Subarus are mentioned, I would have thought there wouldn't be much crank whip in a EJ crank due to the short length. I'm certainly considering a damper for my AMC I6 build, almost all of those old American I6s have big crank whip issues and are well known to not rev much past 5k rpm without breaking.

I want to put one on my '11 Legacy GT with an EJ255 but it has a special size that's not used in any other subaru application :/ earlier EJ motors used the 2 belt setup but the USDM 5th gen legacy only has 1 belt like the FA engines. FA harmonic balancers are a different size too so it looks like I have no options

I'll be adding one to the d16v1 turbo build

I run a fluid damper on my car, its not even really high output but it has really smoothed out my idle and revs. As for power freed up I cant really tell there but for any car I build, a fluid damper will be going on it.

That ball bearing moving so slowly through the fluid is spinning me out ! Haha

I love the theory behind this technology. Could the centre hoop be made with offset heavier elements like some cranks have in their counter weights?

You need to do a back to back comparison with the ATI Super Damper......

Thanks for the vid. If you could just move out of the way i want to see what you've got going on in that GD's engine bay

A great company!

Do they make a liquid one for the KA I would rather go with that than the ATI now.

Can you please do a video on how to get a job with you or another shop like yours

When is fluidampr going to come out with products for the Toyota ur series of engines

yeah thanks so much

Great video, I have a questions. Does an ati pulley balance on a machine that balances engine parts ? Do we balance the engine parts without the ATI pulley and mount the pulley once the engine is finished ? thx

Fluidampr! Please make one for the gen V LT1 Camaro🙏

Very, very informative. After watching the video and comparing the Fluidampr construction to my car’s OEM damper, I’m 99.99% sure it’s made by Fluidampr.

Very nice info!! Can we put up the harmonic damper/fluidamper anytime we wanted? Or it must be balanced together with the cranks during the rebuilt rage?

I'd love to get some info from Mr Kojima regarding air/air vs air/water intercoolers for various situations especially road course/track

I run a fluid dampener on my tuned EVO.

this guy is amazing!!! thank you @MotoIQ

I did not see you both mention the aluminum race pulley with white lettering on it. Was hoping yall would have shed some light on it as I have one installed on my 3rz t100

Put a fluidmpr on my gen2 coyote, I wonder if the timing has improved

i know nobody asks for it but id love to see some coyote content. they used fall flat to the ls in terms of cost to value but with the oldest ones being over ten years old theyre becoming easier to find.

What about how tightly the pulley fits onto the crank? I heard people saying the fluidampr doesn't "press fit" onto the crank whereas the ATI damper does, and that the tighter it fits onto the crank the better it can reduce vibration.

Always wanted to put a fluidamper onto my k20, but the price is what kept me from getting one

I have this thought for a while. The m54b30 is famous for losing the oilpump nut on a frequency due to imbalances. Would a harmonic balancer reduce this effect or even fix this. Or is this due to the mechanical imbalances of the rotating mass of the engine? Any experience with this?

Great video. Like mentioned in the video, it's not a sexy part. People still tend to focus on the bling rather than function.

Please do it for sr20 engine !

Does Fluidamper make applications for the port injected Ford/Mazda Duratecs 2.0/2.3 ('03-'12)?

You’re saying this could go on my 2012 toyota camry se? Granted, it’s very expensive to replace that, but, it’ll provide vibration protection on that car. Went to their website. What type of modifications (special kit) does it need to make it work?

5:42 honda dampeners are good to about 11,000 rpms.

This is really helpful. I was about to install a lightweight damper that I've had laying around, but that isn't happening. I'll be sticking with my stock damper until I buy myself a fluidampr.

I know & my theory was that a Fluid Damper is what 1 particular older "Odd-Fire" engine needed & found an old SAE paper that confirmed it but they decided not to design it probably due to cost. But Fluid Damper dyno analysis is $10k + R&D costs for a custom made damper. I think it would be so exciting what the OEM's left on the table back in the day!

Mike you’re the man! Just out of curiosity, how do they know which frequencies to attenuate on an unknown application? Do they use Modal Analysis or Orbital Plotting to predict? Or do they do experimental testing on the crankshaft? Also have they quantified how many dB of attentuation on the 2nd and 3rd order harmonics compared to a stock unit? Curious, which spectrum analyzer do they use?

Would love to see what they could develop for the VW Porsche Aircooled world.

love my fluidampr on the jz

You sold me! I was doing my do diligence and now convinced I need this for my Duramax LMM build. Thanks for the video!

Are y'all still gonna do a video on the 1GR-FE motor?

Now I understand why it cost me $500 for one. I am glad I did it.

I wish Fluiddampr would make a harmonic balancer for the SR20DET :( I think for my usage 350 to 400ish hp stock OEM balancer should be ok.

Is there any benefit to the fluid damper brand vs the ATI for k24 use? It appears ATI version is slightly cheaper. Also, is this just a bolt on affair?

I didn't know Ray Zalinsky from Tommy Boy was your guest today.

Where can I get one for my 2012 335I F30 Manuel BMW

My Kia G4FJ needs one.

Ok hold on, what on earth was that big word you just said at 4:10!?😅 “hiesteresisisss”

Dame! I want to get a fluid damper for my k swap now. My poor walleeeeeta 😢

i want one for my 1.5L yaris now.

The only engine I know that doesn't need a harmonic balancer are rotary engines because they don't turn reciprocating motion into rotational motion like a piston engine, they are always rotational motion. 👍🤙 Great video guys, keep up the great work 🤘

My experience with dampers is to not drop one onto your toe when removing them.

It's too bad they don't make them for quite a few engines... so while this was a great video, I still can't get either the ATI or a Fluidampr...

What do you torque your fluidamper to on a 2015+ wrx sti ?

Two questions.. Would it benefit my chevy 8.1? Do you make it for a chevy '02 8.1 Vortec?

Yeah you and your ebay LS 😂 had me dead!

Do motorcycles have these vibration dampers? I've seen a few moderns superbikes snap cranks.

From what I've heard if you are just doing bolt on's a light flywheel works, but if you are building a race engine get a harmonic aftermarket

I had to look them up while I was watching. Too bad fluidampr doesn’t make one for an SR20. ATI will have to do.

I wish they'd develop a product for the ND Miata.