Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Old May 24, 2017 | 09:11 AM
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Default Flywheel Bolts

There's a version of truck motor that uses a longer flywheel bolt, as the crank uses a spacer. What I'd like to know, is what is the length of both the short version and the long version of the flywheel bolts, and what is the part number for the longer version.

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Old May 24, 2017 | 09:40 AM
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Would be easier to just find the 2 part numbers, or find ARP equivalents and see what they show for length.

https://ls1tech.com/forums/automatic...s-spacers.html

Part number for long bolts is 19257940.
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Old May 25, 2017 | 12:54 PM
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From Summit Racing's WEB Site:
ARP 244-2901 M11 x 1.5 x .880"
ARP 244-2902 M11 x 1.5 x 1.075"
These are the only M11 bolts ARP lists.I haven't been able to verify the dimensions of the stock GM bolts. Some years ago, an ARP rep told me they made a special run of longer than 1.075" M11 bolts, and I recall someone on another forum got a set at the time. I don't think they intended to make another special run however.

Andy1
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Old May 26, 2017 | 04:11 PM
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I am the one who had the run of bolts made by ARP for the LS to Audi and Porsche transmission adapters I make. They are very expensive and I had to order several dozen at a time. The only other place I have found 11mm bolts used is for head bolts on some import engines but those were all too long. The ones I had made were 3 inches long. What length do you need?
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Old May 30, 2017 | 03:31 PM
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txcarbuilder,

I'm yet to determine how long they should be; still need to drop the motor/trans. I'm familiar with your product offering for LSx to Audi 01e. As it turned out, I made my own adapter plate and configured a clutch/flywheel/TOB based on QuarterMaster components at a time prior to you developing your product. What clutch/pressure plate do you use? If I were to do another one, I'd buy, rather than design and fabricate.

Andy1
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