lt1 flywheel
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Newbie
Joined: Jul 2009
Posts: 5
lt1 flywheel
i have a vibration that feels like it is in my trans. T56. i pulled out the trans. and was looking at the clutch and flywheel. i was under the impression that the lt1 motor was a enternaly balanced motor which would make the flywheel 0 or neutral balanced but my flywheel has a small weight on it. so my question is is it ballanced with the wieight or with out the weight and then the weight is put on? and what is the weight for. thanks
Tech Droid
Joined: Aug 2005
Posts: 9,215
From: North East PA
This may help,
From Centerforce Clutches:
Our sources and expertise have confirmed that the LT1 engine is an externally balanced engine. With that said, a replacement flywheel, ours or another, would have to have the factory counterbalance specification in order for the flywheel to be a bolt on part. The 700170 is a flywheel with a counterbalance which offsets or counteracts the engine's internal out-of-balance condition. A ZZ4 crate engine is also an externally balanced engine.
The reference to having your LT1s internal rotating assembly balanced and thus needed a zero or neutral balanced flywheel was to proide awareness to you that if you did have or planned on having your LT1s internal rotating assembly zero balanced, our 700170 and 700160 would NOT be appropriate. Our 700170 and 700160 flywheels are designed as direct bolt in replacements for factory (OE) original equipment engines with factory balance specifications. Also, if you are using an aftermarket crankshaft, you may have to obtain a zero balanced flywheel depending on the balance characteristics of the crankshaft itself.
If you have any more questions or need any more clarification, please feel free to give us a call. Thanks!
Rick Mard
Technical Representative
Centerforce Clutches,
A Div. of Midway Ind.
928/771-8422 x36
<span style="color:#284b72">rickm@ce...rce.com</span>
From Centerforce Clutches:
Our sources and expertise have confirmed that the LT1 engine is an externally balanced engine. With that said, a replacement flywheel, ours or another, would have to have the factory counterbalance specification in order for the flywheel to be a bolt on part. The 700170 is a flywheel with a counterbalance which offsets or counteracts the engine's internal out-of-balance condition. A ZZ4 crate engine is also an externally balanced engine.
The reference to having your LT1s internal rotating assembly balanced and thus needed a zero or neutral balanced flywheel was to proide awareness to you that if you did have or planned on having your LT1s internal rotating assembly zero balanced, our 700170 and 700160 would NOT be appropriate. Our 700170 and 700160 flywheels are designed as direct bolt in replacements for factory (OE) original equipment engines with factory balance specifications. Also, if you are using an aftermarket crankshaft, you may have to obtain a zero balanced flywheel depending on the balance characteristics of the crankshaft itself.
If you have any more questions or need any more clarification, please feel free to give us a call. Thanks!
Rick Mard
Technical Representative
Centerforce Clutches,
A Div. of Midway Ind.
928/771-8422 x36
<span style="color:#284b72">rickm@ce...rce.com</span>
April 2011 ROTM
Joined: Mar 2009
Posts: 22,001
From: Tokeland, Washington
ROTM Winner's Club
its external on the back and internal on the front. the one piece seal on the back wont allow for the counterbalance needed to internally balance it so the weights are needed on the flywheel to compensate.
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