Re: Flywheel ballancing 360 crate motor
[Re: boydsdodge]
#226297
02/16/09 08:55 AM
02/16/09 08:55 AM
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Joined: Apr 2004
Posts: 2,415 Connecticut
Ron_M
top fuel
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top fuel
Joined: Apr 2004
Posts: 2,415
Connecticut
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Is the driveshaft balanced? I would look there and it's relatively easy and not too much $$$.
Any idea what the Flywheel came out of? The Magnum 360 Flywheel is different from the LA. It is identified in the MP Parts Catalog (which might still be online)
Had a problem like that with my GTX and it was the driveshaft.
Last edited by Ron_M; 02/16/09 08:57 AM.
Common sense is a flower that does not grow in everybody's garden
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Re: Flywheel ballancing 360 crate motor
[Re: Ron_M]
#226299
02/16/09 09:12 AM
02/16/09 09:12 AM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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if you have the car at rest in neutral and bring the revs up to the same RPM as you feel the vibration at 65mph, then it's in the flywheel/crank. otherwise it's somewhere else, either a tire balance/runout problem, pinion angle problem, or bent/out of balance driveshaft.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Flywheel ballancing 360 crate motor
[Re: boydsdodge]
#226300
02/16/09 10:35 AM
02/16/09 10:35 AM
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Joined: Jul 2005
Posts: 757 Toronto, Ont, Canada
boydsdodge
OP
super stock
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OP
super stock
Joined: Jul 2005
Posts: 757
Toronto, Ont, Canada
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Thanks for the replies, This was the second time driving the car, we got a real nice break in the weather so I went out for a cruise. The first time I drove the car was last fall from Niagara Falls to Toronto after it was shipped from Cali. On that trip it was awfull, the car went straight to the shop, did a complete look over and thats where I found it needed all the bushings I mentioned. The engine is fairly new, and I was told by PO that it was about 8000 miles, trans is even newer maybe 2000 it's from passon and still very stiff, and the diff from Mancini, along with drive shaft. I have reballanced the wheels, etc.. What I am looking for from you guys is the difference of a 360 magnum and a 360 LA. I know what to look for on a LA but not on a Magnum if there is one, I think you guys get what I am saying. Thanks. Maybe I should have ask whats the diff between an LA and magnum in the ballance?
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Re: Flywheel ballancing 360 crate motor
[Re: boydsdodge]
#226301
02/16/09 12:03 PM
02/16/09 12:03 PM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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there is a difference in external balance factor between the LA and mag 360, not sure of the exact amount. cranks are the same, but the mag has lighter rods, pistons, and ring pack which accounts for the difference. but if you put it in neutral with the car stopped, and rev the engine to the RPM points you feel the vibration at on the road, and it DOESN'T vibrate, then you can rule out anything ahead of the tranny, including the balance of the flywheel. it's a cheap test to prevent spending a lot of time and $$ on something that's not the problem.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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