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Author
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Topic: Started up my 347 first time last night, problems . . .
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SydeWaySix
CAFords OG
Member # 3596
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posted
 
 
hey guys,
i just finished my car yesterday night, fired it up and took it around the block. first thing i noticed was the whole car was shaking so bad (i have poly motor/tranny mounts) that the cd in the player couldn't even play w/o skipping. is this what to expect from these mounts?? it's not hte balancer, or anythingelse, i just put this motor together yesterday.
also, when i got back from the drive, i tried to start it again, and nothing would happen. i mean, the starter would spin, but the motor wouldn't crank. one of my buddies suggested the bendix went out or something? i searched on corral and couldn't find an answer.
any help would be awesome!
thanks,
phil
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2013 Boss 302 #356. Performance White. Stock.
1965 Fastback GT Restored to stock spec.
Posts: 9882 | From: Bay Area | Registered: Dec 2002
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92stangLX
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Member # 3252
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posted
I have poly motor and tranny mounts and don't have really bad vibration problems. What is your combo? Are you running a big cam? Does the vibration happen all the time or just at certain RPMs?
If the starter just spins and the motor doesn't crank then it could be the solenoid is shot. I would first check the connection on the started (to the solenoid) to see if it has come loose. On the mini-torque starters it is connected with a spade connector and I could see how that could come loose if you are having a lot of vibration.
Are you running long tubes?
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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Fostang
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Member # 3752
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posted
Did you use a used starter on a new motor?
It's probably dead.... ![[Frown]](frown.gif)
Not enough juice to crank it since it has full compression.
Motor shaking hmmm firing order right? maf matches injectors? running rich or lean?
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67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3012 | From: Stockton/Danville | Registered: Nov 2003
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AJBlackGT
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Member # 3936
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posted
Have you set the timing on the motor yet?
That could cause the shake
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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93LX342
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Member # 1793
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posted
make sure all wires are in the correct order.and make sure timing is right.
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06 f250 superduty with some mods.
95 f250
www.unlimitedracing.com
Posts: 1036 | From: san jose | Registered: Sep 2002
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SydeWaySix
CAFords OG
Member # 3596
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posted
thanks guys!
well, i figured out the starter issue, it's cranking fine now.
the vibration is still unsolved though. the MAF is cal'd to the injectors, the timing is pretty close, haven't really worried about it that much since i knew i wasn't gonna drive it just yet, but it's not far off enough to cause it to shake this bad. everything's balanced to 50oz too
anyway, thanks again
phil
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2013 Boss 302 #356. Performance White. Stock.
1965 Fastback GT Restored to stock spec.
Posts: 9882 | From: Bay Area | Registered: Dec 2002
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cvr 5.0
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Member # 2962
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posted
external balanced or internal balanced?????? ![[Confused]](confused.gif)
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-89 MUSTANG 5.0 lx vert (sold as of 2-10-08 for $8K)
-Ford F-100 with blown chevy 502
2004.5 dodge ram, 500hp and 1100tq
-84 yoda on 39s
Posts: 977 | From: Fremont ,ca | Registered: Jun 2003
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silverLX
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Member # 3207
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posted
did you put the balancer on right? sounds like its not all 50oz balanced...
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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forced331
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Member # 1270
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posted
Isn't 347 and 331 supposed to balance at 28oz. When I first started my motor I had a bad vibration could not figure it out until I looked at the spec sheet and it called for 28oz balance and they had sent me 50oz balancer and flywheel. I reinstalled the balancer and flywheel with 28oz and the engine ran smooth. Just double check and make sure the balance is correct. Goodluck!
Posts: 1154 | From: Sonoma County | Registered: May 2002
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AJBlackGT
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Member # 3936
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posted
I'm with forced on this one
I think most stroker manufacturers balance their assemblies to 28oz.
Did your machinist have to add an assload of mallory to get it balanced?
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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BlueOvalRacing
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Member # 1531
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posted
My 331 is balanced to 50 oz. with no Mallory Metal. The front and rear counterweights are drilled out quite a bit.
[ January 24, 2005, 06:56 PM: Message edited by: BlueOvalRacing ]
Posts: 1159 | From: Pioneer | Registered: Jul 2002
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forced331
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Member # 1270
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posted
Most of everyone I ran in too or seen online had 28oz balancing on 331 and 347's. Isn't 50oz balance stock?
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1992 Ford Mustang LX (Original Owner)"Titanium Frost" 331stroker S-Trim, 5spd
2014 Ford Mustang GT- daily driver
Posts: 1154 | From: Sonoma County | Registered: May 2002
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BlueOvalRacing
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Member # 1531
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posted
quote:
Originally posted by forced331:
Most of everyone I ran in too or seen online had 28oz balancing on 331 and 347's. Isn't 50oz balance stock?
Yes, 50 oz. is stock. I asked CHP if they could balance my rotating assy. to 50 and they said no problem. The balancing holes in the front and rear counterweights actually intersect each other at the bottom.
Posts: 1159 | From: Pioneer | Registered: Jul 2002
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