|
Re: Good balancer or elcheapo....
[Re: steve660]
#1795277
04/03/15 12:34 PM
04/03/15 12:34 PM
|
Joined: Jan 2003
Posts: 13,345
Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,345
Marion, South Carolina [><]
|
Quote:
going either Fluidamper or ATI.
 I have one of each...no problems w/ either.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
|
|
|
Re: Good balancer or elcheapo....
[Re: an8sec70cuda]
#1795278
04/03/15 02:06 PM
04/03/15 02:06 PM
|
Joined: Jan 2003
Posts: 19,352
Las Vegas
Al_Alguire
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 19,352
Las Vegas
|
ATI period!!! No way to actually check balance on a Fluidampr also they can solidify and cause some ugly issues.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
|
|
|
Re: Good balancer or elcheapo....
[Re: steve660]
#1795279
04/03/15 02:13 PM
04/03/15 02:13 PM
|
Joined: Nov 2004
Posts: 2,825
Sk. Canada
RemCharger
master
|
master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
|
Quote:
Little more info........The engine builder put this balancer on a 4.75 stroke Callies crank. Dyno'd at 1000hp.
 Seem to be reliable at 6-700, seen them slip at 800, 1000? No way I would short the mill on a good balancer.
|
|
|
Re: Good balancer or elcheapo....
[Re: steve660]
#1801996
04/12/15 10:04 PM
04/12/15 10:04 PM
|
Joined: Apr 2007
Posts: 289
Lowes
steve660
OP
enthusiast
|
OP
enthusiast
Joined: Apr 2007
Posts: 289
Lowes
|
...UPDATE... upon closer inspection looks like something has moved / shifted....Look where the bare metal shows no paint and you'll see it. This was after maybe 20 min on dyno...Also still waiting on build sheet, cam card, among other things promised. Patience is wearing thin.....
Last edited by steve660; 04/12/15 10:07 PM.
PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure.
..... Now its a door stop....
|
|
|
Re: Good balancer or elcheapo....
[Re: steve660]
#1802001
04/12/15 10:06 PM
04/12/15 10:06 PM
|
Joined: Apr 2007
Posts: 289
Lowes
steve660
OP
enthusiast
|
OP
enthusiast
Joined: Apr 2007
Posts: 289
Lowes
|
1 more picture....Im sure I'll be told this is normal. It's just a giant lock ring, right.
PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure.
..... Now its a door stop....
|
|
|
Re: Good balancer or elcheapo....
[Re: steve660]
#1817192
05/02/15 05:50 PM
05/02/15 05:50 PM
|
Joined: Apr 2007
Posts: 289
Lowes
steve660
OP
enthusiast
|
OP
enthusiast
Joined: Apr 2007
Posts: 289
Lowes
|
This engine supposedly made 1000 hp, yet only had 150 cyl psi. Don't see how that's possible. Must be a happy dyno. Not sure on the cam specs, they wont send me or didn't keep cam card.
PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure.
..... Now its a door stop....
|
|
|
Re: Good balancer or elcheapo....
[Re: rickraw]
#1817230
05/02/15 06:26 PM
05/02/15 06:26 PM
|
Joined: Apr 2007
Posts: 289
Lowes
steve660
OP
enthusiast
|
OP
enthusiast
Joined: Apr 2007
Posts: 289
Lowes
|
...
Last edited by steve660; 05/05/15 08:13 PM.
PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure.
..... Now its a door stop....
|
|
|
Re: Good balancer or elcheapo....
[Re: steve660]
#1817449
05/03/15 12:50 AM
05/03/15 12:50 AM
|
Joined: Jan 2003
Posts: 20,156
Park Forest, IL
slantzilla
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 20,156
Park Forest, IL
|
This engine supposedly made 1000 hp, yet only had 150 cyl psi. Don't see how that's possible. Must be a happy dyno. Not sure on the cam specs, they wont send me or didn't keep cam card. I was at the ICH swap and saw the spec card and dyno sheet on a pump gas 451 MM built. Ported 452's, Purple Stripe 474 cam and 10-1 made 525 horse and 570 tq. I'm thinking way happy dyno.
"Everybody funny, now you funny too."
|
|
|
Re: Good balancer or elcheapo....
[Re: dogdays]
#1818634
05/04/15 05:11 PM
05/04/15 05:11 PM
|
Joined: Apr 2007
Posts: 289
Lowes
steve660
OP
enthusiast
|
OP
enthusiast
Joined: Apr 2007
Posts: 289
Lowes
|
Hey, you could give it to me! I'll even pay postage.
From my point of view, the rubbed off paint marks show that the damper was doing exactly what it was supposed to. As the power stroke pushes the hub ahead, the inertia ring stays behind, tethered by the rubber that's between the two. Then the rubber unstretches and the inertia ring is back to the starting point, when another power stroke happens and the same things occur again.
The rubbed off paint shows you how much the inertia ring actually moves. I'm surprised at how much it is, but I've never had a damper on a 1000? hp engine either.
R. I don't think it's suppose to move ,but I could be wrong.
PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure.
..... Now its a door stop....
|
|
|
Re: Good balancer or elcheapo....UPDATE....MUSCLE MOTORS..
[Re: steve660]
#1818647
05/04/15 05:33 PM
05/04/15 05:33 PM
|
Joined: Oct 2007
Posts: 4,205
New York
polyspheric
master
|
master
Joined: Oct 2007
Posts: 4,205
New York
|
Please note: the SEMA damper standard (S.F.I. 18-1) does not rate a damper’s effectiveness, or certify that it works at all (let alone on a specific motor) - only that it didn’t explode during the test. Their interest is limited to safety and qualify control, not specific engineering results.
Boffin Emeritus
|
|
|
Re: Good balancer or elcheapo....UPDATE....MUSCLE MOTORS..
[Re: steve660]
#1818892
05/04/15 10:23 PM
05/04/15 10:23 PM
|
Joined: Oct 2007
Posts: 4,205
New York
polyspheric
master
|
master
Joined: Oct 2007
Posts: 4,205
New York
|
Some damper designs are more tolerant of internal engine mods, in which changes to stroke are probably safer.
If you're not sure, read up.
The "harmonic orders" that cause the problems are not a function of balance, or power, or reciprocating weight. They are far more closely related to:
1. crankshaft length
2. stroke length
3. main journal size
4. rod journal size
5. number of mains
Increases to 1. & 2. reduce overall crankshaft stiffness and reduce the RPM at which harmful orders occur (from which the engine needs protection). Increases to 3., 4., & 5. increase stiffness and increase the critical RPM.
Bottom line: don't use a damper designed for an engine with different crank geometry unless you're sure its design accepts the differences.
A stock 383 has very different crank stiffness from a 4.15" stroker with BBC rods.
Boffin Emeritus
|
|
|
Re: Good balancer or elcheapo....UPDATE....MUSCLE MOTORS..
[Re: polyspheric]
#1819009
05/05/15 12:10 AM
05/05/15 12:10 AM
|
Joined: Apr 2007
Posts: 289
Lowes
steve660
OP
enthusiast
|
OP
enthusiast
Joined: Apr 2007
Posts: 289
Lowes
|
Some damper designs are more tolerant of internal engine mods, in which changes to stroke are probably safer.
If you're not sure, read up.
The "harmonic orders" that cause the problems are not a function of balance, or power, or reciprocating weight. They are far more closely related to:
1. crankshaft length
2. stroke length
3. main journal size
4. rod journal size
5. number of mains
Increases to 1. & 2. reduce overall crankshaft stiffness and reduce the RPM at which harmful orders occur (from which the engine needs protection). Increases to 3., 4., & 5. increase stiffness and increase the critical RPM.
Bottom line: don't use a damper designed for an engine with different crank geometry unless you're sure its design accepts the differences.
A stock 383 has very different crank stiffness from a 4.15" stroker with BBC rods. Bottom line: Don't cheap out on a balancer.
PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure.
..... Now its a door stop....
|
|
|
Re: Good balancer or elcheapo....UPDATE....MUSCLE MOTORS..
[Re: steve660]
#1819199
05/05/15 10:12 AM
05/05/15 10:12 AM
|
Joined: May 2014
Posts: 503
Idaho
1320Dart
mopar
|
mopar
Joined: May 2014
Posts: 503
Idaho
|
In the MP book, in the racing BB section. They talk about dampers. They say to go with a heavy damper. I like the Pro Race brand. http://www.pro-race.com/prorace.htmThey are SFI approved. I've always had good luck with them. 
Greg ----------------------------------------------------------------- Cost is irrelevant, making memories is far more valuable! 
|
|
|
|
|
