harmonic balancer and flywheel

[wildphil]

You guys with built engines. What are you using for the balancer and flywheel. When I pulled my balancer it fell apart. I thought that I would check and see what everyone is using. Internal or external balanced?

 

[Norm]

Re: harmonic balancer and flywheel

I had a fluidamper on mine and a I can't remember what make/model the flex plate was, just that it was SFI approved.

 

[Matt]

Fluid dampener and a b&m Sfi rated flexplate

 

[JSM]

Re: harmonic balancer and flywheel

ATI.

Have heard mixed results of fluiddampner but no first hand knowledge.

 

[MoJo]

Re: harmonic balancer and flywheel

You guys with built engines. What are you using for the balancer and flywheel. When I pulled my balancer it fell apart. I thought that I would check and see what everyone is using. Internal or external balanced?

My engine builder and machinist recommended and installed the following:
TCI 399774 flex plate (.035" thicker - HD)
Internal engine balance
Neutral flexplate balance
Counterweighted for one piece seal crank.
SFI 29:1

Pioneer 872021 damper
6.100" O.D.
Neutral damper balance
Internal engine balance
SFI 18:1

Fits and works perfect.

 

[BoostedSUV]

Re: harmonic balancer and flywheel

You don't need SFI rated flexplate or balancer. You're only paying for the approval. Unless you are racing and your class requires the use the of SFI rated equipment I would save the money and just use non SFI approved quality components.

 

[DaveP]

Re: harmonic balancer and flywheel

I used one of these. Cost $50.00.

There's no reason to go to internal balance on a street engine. Keep it simple, and save your money for stuff you really need.

 

[Don W.]

Re: harmonic balancer and flywheel

Same here. After market damper, external balanced SFI flex plate. Stock is external balance on the flex plate and no balance weights on the damper. You will find holes all the way around the stock damper with maybe a few filled. This was done as a final "fine tune" if-you-will of the factory balance with the engine running as I understand. Motor apart? Have it balanced IMHO. Well worth it when you see where they had to remove or add metal.

 

[nallj92]

Re: harmonic balancer and flywheel

I'm pretty sure i have a pioneer SFI balancer and a pioneer flex plate as well ( non- sfi).

 

[Syclone22]

Re: harmonic balancer and flywheel

After my engine rebuild i switch to ATI damper
and B and M external balance flexplate !! :tup:

 

[jharrison]

Re: harmonic balancer and flywheel

I went with a Pioneer SFI balancer and RPM SFI flexplate.

 

[MoJo]

Re: harmonic balancer and flywheel

OE flexplate...GM 14088761 ( non-SFI ) ........... $96.00

TCI 399774 flexplate, .035" thicker ( SFI ) .... ....$107.00

Some people spill more beer on weekends than $11 difference in price.

 

[sytyguy]

Re: harmonic balancer and flywheel

We've sold Pioneer for the last 5-6 years with great success.

 

[DaveP]

Re: harmonic balancer and flywheel

OE flexplate...GM 14088761 ( non-SFI ) ........... $96.00

TCI 399774 flexplate, .035" thicker ( SFI ) .... ....$107.00

ATP Z166 $38.79. I get them from the transmission parts house 10 minutes from me. Always in stock, no waiting.

68.21 difference in price. -4.80 difference in sales tax, -18.00 in Income Tax savings. For a total savings of 91.01.

When you pay less for an item, you save in other areas as well.

 

[Throws]

Re: harmonic balancer and flywheel

You don't need SFI rated flexplate or balancer. You're only paying for the approval. Unless you are racing and your class requires the use the of SFI rated equipment I would save the money and just use non SFI approved quality components.

So... pardon the ignorance, but how do they verify this? I'm assuming (ass-u-me) that they rely on an honors system of sorts, and if you're a class winner, using non-SFI equipment req'd for your class would get you DQ'd. I know it's all done in the need for safety, but I'm curious.

-P

(Disclaimer: I've only raced one drag-day, and I sucked balls at light timing).

 

[MoJo]

Re: harmonic balancer and flywheel

The SFI (SEMA Foundation, Inc.) certification sticker on parts is to assure the customers and sanctioning body that the manufacturer who made the part used SFI Foundation minimum standards. The SFI standards have been adopted by members of SFI. A few members include NASCAR, NHRA, IMCA, SCTA, SDBA, NMCA, among many others, even the WKA (World Karting Association). SFI Foundation is no longer affiliated with SEMA although SFI still uses the SEMA Foundation, Inc. acronym.. NHRA requires a SFI 29.1 certified flexplate on cars running 9.99 ET or quicker and the certification must be renewed every 3 years. .

SFI can be compared to NESC (National Electrical Safety Code) standards. It is a code and not a law, unless the code is adopted by a governing body.

 

[wildphil]

Re: harmonic balancer and flywheel

Thanks to everyone that responded.You gave me some great info on the choices.

 

[Captain Morgan]

Re: harmonic balancer and flywheel

phil is done with his research in this thread, so i can make a comment i noticed a couple days ago:

Of the people i know in this thread, mojo is the only guy in this thread that does not build his own engines. I'm personally aware that nine of the peeps in this thread build their own engines, and several of them do it for others as well. (jeff, hood, and myself). There's a ton of experience talking here by people that have done it themselves. Not had "their engine builder" do it for them.

Thanks for the input, but how would you know what's in your engines if you didn't put it there? And how would you know if it "fits perfect" if you didn't install it? Go back to the s-series forums. You'll fit in better with people that don't know what they're doing, or how to build engines.. We do.

x2

 

[Jimmy]

Re: harmonic balancer and flywheel

Phil is done with his research in this thread, so I can make a comment I noticed a couple days ago:

Of the people I know in this thread, MOJO is the only guy in this thread that DOES NOT BUILD HIS OWN ENGINES. I'm personally aware that NINE of the peeps in this thread build their OWN engines, and several of them do it for others as well. (Jeff, Hood, and myself). There's a TON of experience talking here by people that have done it themselves. Not had "their engine builder" do it for them.

Thanks for the input, but how would you know what's in your engines if YOU didn't put it there? And how would you know if it "fits perfect" if YOU didn't install it? Go back to the S-series forums. You'll fit in better with people that don't know what they're doing, or how to build engines.. We do.

:haha: :tup:

Ya think?

 

[alwayscode390]

Re: harmonic balancer and flywheel

I used one of these. Cost $50.00.

There's no reason to go to internal balance on a street engine. Keep it simple, and save your money for stuff you really need.

I just purchased one of those too ... are they strictly stock replacement (made exactly like a stock unit) or are they upgraded so chances are they wont fly apart or "walk" the timing marks as easily as a stock unit?

Are these neutral balance balancers ... or are they actually "harmonic" balancers?

Thanks ---