Cons to a lowered weight pulley set?

[tennisfreak]

Originally Posted by Dihudaxia

Hmmmm.. Answers still needed, but thanks for the review.


Also wondering, are those Accessories Pulley kit (eg: Perrin), worth the extra $200 over just a simple Crank Pulley?

I understand further weight losses are a good thing, but not sure if any benefits, if at all, can be felt/seen

Personally I'd say the name brand high price pulleys are not worth it period. They are all overpriced because of the name.


I bought a CircuitWerks pulley set (3 piece) for $155 and its been running like a champ on my car for well over a year. Its made out of the exact same aluminum the name brands use and is lighter than the Perrin stuff.


Name brand stuff is quality so don't get me wrong. For the pulley set and what you gain from it though I just don't see putting all that money into it.
If I could do it over I'd probably just pass on it.

[2016 Camaro SS]

I went with the Grimmspeed pulley and just installed it last night. I had the Perrin one on for about a year before I put the stock one back on because I thought I was putting on the Kraftwerks kit which requires the stock pulley for its bracket. I am selling that kit so I went back to a lightweight crank pulley again.

The difference isn't very drastic between having one and not having one. You might feel it rev just a little bit quicker, but other than that, it's very minor. I like the looks of it more than anything for car shows. As for the full pulley sets, I think those are a bit much. I can't see myself spending $500 for every pulley besides it looking really cool. If anything, the only one that seems to matter is the crank.

Just make sure your pulley is balanced and not wobbling after the install and you will not see any issues with it at all.

[Dihudaxia]

Thanks for all the feedback and advice!
Looks like its gonna be just the LWCP for me


Now its a question of raceseng or beatrush only...

[8686]

Now that fluidamper is released for our engine

http://www.ft86speedfactory.com/flui...mper-2009.html

Do you guys think its worth it specially that they are showing power increase in their graph.

[stugray]

Originally Posted by 8686

Now that fluidamper is released for our engine

http://www.ft86speedfactory.com/flui...mper-2009.html

Do you guys think its worth it specially that they are showing power increase in their graph.

The most important item I found in that explanation was a comment about the Lightweight Crank Pulley testing: "Further analysis shows that installing this lightweight pulley shifted the resonance frequency of the rotating assembly to a point directly within the rpm range. The result was higher magnitude 5th order and 6th order vibrations at a potentially destructive 600Hz from 4500rpm through redline. Higher frequency vibrations, because they happen more often per crank revolution can create hazardous stress, excessive wear and potential failure of bearings and oil pump gears."

There is definitive evidence of the NEGATIVE effects of running a LWCP.
Something that SOME OF US have been saying ALL ALONG!

[tennisfreak]

Originally Posted by stugray

The most important item I found in that explanation was a comment about the Lightweight Crank Pulley testing: "Further analysis shows that installing this lightweight pulley shifted the resonance frequency of the rotating assembly to a point directly within the rpm range. The result was higher magnitude 5th order and 6th order vibrations at a potentially destructive 600Hz from 4500rpm through redline. Higher frequency vibrations, because they happen more often per crank revolution can create hazardous stress, excessive wear and potential failure of bearings and oil pump gears."

There is definitive evidence of the NEGATIVE effects of running a LWCP.
Something that SOME OF US have been saying ALL ALONG!

Or it could be marketing to get you to buy their pulley? A almost $400 pulley. Why not stick with the stock pulley if one is worried about harmonic vibration damage?

I mean you could almost buy their pitch until this:

The torque and horsepower results proved positive on the chassis dyno with the Fluidampr performance damper besting both the stock damper and lightweight pulley, providing consistent performance gains from 4000rpm to redline

Read more: http://www.ft86speedfactory.com/flui...#ixzz3VDvuVvKl

So their pulley gives you gains over the stock and lightweight pulley? LMAO

I mean they are in business to get you to buy their product and seem to lie like everyone else.

Fluidampr is a division of Horschel Brothers Precision which is a small local machine shop in NY. Neither of which are registered with BBB.

I cannot find anything that would suggest they are a industry leader or widely renowned. So IMO they are just another small business trying to make a buck.

If there is definitive evidence of the lightweight crank pulley why would FT86Speedfactory still be selling them?

IMO it would damage the credibility of FT86Speedfactory if they were selling products that are proven to do nothing other than cause direct damage to your engine.

[stugray]

Originally Posted by tennisfreak

Or it could be marketing to get you to buy their pulley? A almost $400 pulley. Why not stick with the stock pulley if one is worried about harmonic vibration damage?

I mean you could almost buy their pitch until this:


So their pulley gives you gains over the stock and lightweight pulley? LMAO

I mean they are in business to get you to buy their product and seem to lie like everyone else.

Fluidampr is a division of Horschel Brothers Precision which is a small local machine shop in NY. Neither of which are registered with BBB.

I cannot find anything that would suggest they are a industry leader or widely renowned. So IMO they are just another small business trying to make a buck.

If there is definitive evidence of the lightweight crank pulley why would FT86Speedfactory still be selling them?

IMO it would damage the credibility of FT86Speedfactory if they were selling products that are proven to do nothing other than cause direct damage to your engine.

I wasnt arguing any merits to therir product.
I was only commenting because (IF you believe that they did the tests) they have proof that:
1 - the stock pulley IS A HARMONIC DAMPENER.
2 - Installing a LWCP brings the harmonics down to where they have an effect in the stock RPM range.
This is PRECISELY what we have been trying to tell the "LWCPs are the BOMB" crowd.

[cjd]

Originally Posted by stugray

I wasnt arguing any merits to therir product.
I was only commenting because (IF you believe that they did the tests) they have proof that:
1 - the stock pulley IS A HARMONIC DAMPENER.
2 - Installing a LWCP brings the harmonics down to where they have an effect in the stock RPM range.
This is PRECISELY what we have been trying to tell the "LWCPs are the BOMB" crowd.

Actually, I see no direct evidence of (1), though I understand how it might be inferred. That's not to say that it isn't tuned to shift a resonance of course, just that without similar charts for stock there's no way to say exactly how it performs.

(2) is clearly suggested by the graphs they provide.

I'm not sure what to make of the 78Hz data, nor what's within acceptable operating spec for the normal life expectancy of this engine.

[stugray]

Originally Posted by cjd

Actually, I see no direct evidence of (1), though I understand how it might be inferred. .

The stock pulley is, in fact, a textbook example of a torsional vibration damper. IF it is installed to reduce harmonics, then it is a harmonic damper.

Based on the test data, it IS a harmonic damper as it clearly dampens harmonics that a solid pulley does not.

[Koa]

Originally Posted by tennisfreak

Or it could be marketing to get you to buy their pulley? A almost $400 pulley. Why not stick with the stock pulley if one is worried about harmonic vibration damage?

I mean you could almost buy their pitch until this:


So their pulley gives you gains over the stock and lightweight pulley? LMAO

I mean they are in business to get you to buy their product and seem to lie like everyone else.

Fluidampr is a division of Horschel Brothers Precision which is a small local machine shop in NY. Neither of which are registered with BBB.

I cannot find anything that would suggest they are a industry leader or widely renowned. So IMO they are just another small business trying to make a buck.

If there is definitive evidence of the lightweight crank pulley why would FT86Speedfactory still be selling them?

IMO it would damage the credibility of FT86Speedfactory if they were selling products that are proven to do nothing other than cause direct damage to your engine.

The BBB is a toothless tiger- it's not indicative of the actual realm of business in America. That is much harder to discern than the glorified Yelp leads us to believe.. they want us to believe that's a JD Power & Associates type seal, but it simply doesn't have the command that the organization wants us to believe

but @stugray is 100% on this.. why risk it for such a miniscule gain? In fact, some may say the gain is unrealizable

[cjd]

Originally Posted by stugray

The stock pulley is, in fact, a textbook example of a torsional vibration damper. IF it is installed to reduce harmonics, then it is a harmonic damper.

Based on the test data, it IS a harmonic damper as it clearly dampens harmonics that a solid pulley does not.

I guess I'm being pedantic, but the test data does not do anything to demonstrate the stock pulley performance with respect to harmonics or damping. We can only identify that a rise in vibration is observed with the particular light weight pulley tested which does not occur with the Fluidampr product.

If the gains are to be believed as more than statistical variance, there may be something in the stock pulley that's not quite right too.

I'm not attempting to discount the resonance issues here, but am hoping to prevent extrapolation of data from becoming observed/documented fact. It's not - it's an inference for which we do not have discrete data.

[tennisfreak]

Originally Posted by stugray

I wasnt arguing any merits to therir product.
I was only commenting because (IF you believe that they did the tests) they have proof that:
1 - the stock pulley IS A HARMONIC DAMPENER.
2 - Installing a LWCP brings the harmonics down to where they have an effect in the stock RPM range.
This is PRECISELY what we have been trying to tell the "LWCPs are the BOMB" crowd.

I guess my main point is that how can you believe anything they claim after reading this crap

The torque and horsepower results proved positive on the chassis dyno with the Fluidampr performance damper besting both the stock damper and lightweight pulley, providing consistent performance gains from 4000rpm to redline

[weederr33]

So...... LWCP = bad?

[Infamous Performance]

Stay stock, stay happy. If its a race car...