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Abaddon
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PostSubject: Re: harmonic balancer   Fri Aug 22, 2014 4:53 pm

AA wrote:
Removal = less weight, so I can see that. But I don't get why one would spend $250+ on a neutral shaft from ZZP. puzzledWhy not plug the oil galleys for free?

Because people will buy "options".

Charlie, why on earth would we want to run against a 9 sec Camaro? twak
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charlieRobinson
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PostSubject: Re: harmonic balancer   Fri Aug 22, 2014 5:56 pm

It's not so much that we want to run against the camaro..

Bill wants to see what we can do and he said he would be down for a meet at Milan.

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AA
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PostSubject: Re: harmonic balancer   Fri Aug 22, 2014 6:01 pm

I saw that Camaro in his garage (think it ran 10 sec at the time). I remember it used a set of red HS rockers!

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'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
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charlieRobinson
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PostSubject: Re: harmonic balancer   Fri Aug 22, 2014 6:11 pm

Maybe it's his Nova that runs 9s.

I dont know, but he's a racer and he wants to see our Rivs on the track.

He's a cool dude.
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PostSubject: Re: harmonic balancer   Fri Aug 22, 2014 9:08 pm

I've been in some GTPs and Regals where the missing balance shaft makes a difference. They have a much tighter mounting system though, and these usually had poly bushings in the dog bones to make it worse. The Riv has a very soft engine mount so you won't notice the engine vibration as much, but it's definitely there.
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PostSubject: Re: harmonic balancer   Tue Jun 02, 2015 3:31 pm

Anybody running one of these?
http://zzperformance.com/3800/pulleys-belts/8-rib-sfi-balancer.html



per ZZP: It is only safe to spin an L67/L32 to ~6300 rpm on a stock balancer. Going over that can cause bearing failure, flex plate failure and power loss due to harmonics.


I am trying to rev at or a little higher than 6300 rpm.. thinking i should probably invest in one of these?
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AA
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PostSubject: Re: harmonic balancer   Tue Jun 02, 2015 3:55 pm

Stock balancer still intact, has survived multiple trips to 6k RPM, but I don't rev that high anymore. If I needed a new one, this one looks like a pretty good one. Consider it is 3 lb heavier than stock, so there is slightly added parasitic load, but you won't likely notice (lighter crank pulleys offer very slight HP advantages at very high RPM, also not noticeable).

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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matt270avian
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PostSubject: Re: harmonic balancer   Tue Jun 02, 2015 4:01 pm

I would think those would be more for those who need an 8 rib setup due to belt slip (Turtle). Most L67 setups don't make much power in the high RPM ranges anyways unless they're turbo swapped, so isn't it kind of pointless to go that high?
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PostSubject: Re: harmonic balancer   Tue Jun 02, 2015 4:03 pm

matt270avian wrote:
I would think those would be more for those who need an 8 rib setup due to belt slip (Turtle). Most L67 setups don't make much power in the high RPM ranges anyways unless they're turbo swapped, so isn't it kind of pointless to go that high?


XP cam is to rev up to 6700RPM per ZZP
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AA
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PostSubject: Re: harmonic balancer   Tue Jun 02, 2015 4:09 pm

I don't think you will really benefit until you have high-flow heads and bigger exhaust. Then it could get interesting above 6k RPM - if your blower can keep up (twin-screw or turbo time).

($$$$$$$$$$$$$$$$$$$$$$)

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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http://www.cardomain.com/ride/657082/4
Karma
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PostSubject: Re: harmonic balancer   Tue Jun 02, 2015 4:36 pm

charlieRobinson wrote:

matt270avian wrote:
I would think those would be more for those who need an 8 rib setup due to belt slip (Turtle). Most L67 setups don't make much power in the high RPM ranges anyways unless they're turbo swapped, so isn't it kind of pointless to go that high?



XP cam is to rev up to 6700RPM per ZZP

huh. well I guess you'd better do it then.

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turtleman
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PostSubject: Re: harmonic balancer   Tue Jun 02, 2015 4:59 pm

That's the balancer I'm running. No trouble with it that I'm aware of. There's a mixture of reasons to use it. None of them alone are enough but it would be highly justified if your original has the circumferential dry cracking, you anticipate going to an 8rib belt, want to go ham with the xp. The cam is good to high rpm, the heads and whatnot might not be.
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charlieRobinson
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PostSubject: Re: harmonic balancer   Tue Jun 02, 2015 11:25 pm

AA wrote:
I don't think you will really benefit until you have high-flow heads and bigger exhaust. Then it could get interesting above 6k RPM - if your blower can keep up (twin-screw or turbo time).
($$$$$$$$$$$$$$$$$$$$$$)

I dont know. ZZP says 6700 RPM with XP on stock heads. Only a dyno or turbo tim email might tell..

My cutoff has been set at 6400 with 6100 max shift point since I installed. I wasnt even aware the balance pulley was a weak point until I found that page today. If they say max rpm with stock pulley is 6300 then fug it. Im going to upgrade just to be safe and confidently experiment with higher RPM shifts.


turtleman wrote:
That's the balancer I'm running. No trouble with it that I'm aware of. There's a mixture of reasons to use it. None of them alone are enough but it would be highly justified if your original has the circumferential dry cracking, you anticipate going to an 8rib belt, want to go ham with the xp. The cam is good to high rpm, the heads and whatnot might not be.

Thanks Cody. I am definitely going 8 rib someday. Heads will only happen if ZZP offers 20% everything in their store and I can get those aluminum heads at a discount.. Plan on taking xp and bottom end to max potential with this build.

My second Riv will be the 600WHP+ racer build. This Riv is just my DD. Riv for life. afro

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Karma
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PostSubject: Re: harmonic balancer   Wed Jun 03, 2015 9:02 am

Even if its not needed, 8 rib just looks sweet.

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