Generation III Internal Engine 1997-2006 LS1 | LS6
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Speedmaster ls1 cast stroker crank.

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Old Oct 2, 2017 | 03:35 PM
  #21  
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Put it on the bathroom scale and it says 53.8 lbs remember thats with no reluctor wheel. I got it to the machine shop today so I should know whats goin on with the measurements in the next two days or so.
Fingers crossed.
Thanks lance. Well its going in my cruizer and might see the strip every now n then. Gonna send my 241 heads to lloyd elliot for porting and have him grind me a cam.
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Old Oct 2, 2017 | 03:37 PM
  #22  
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Looks like it needs a polish but good deal
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Old Oct 2, 2017 | 03:45 PM
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Yeah its all that rust preventative when clean the polished surfaces are actually perfect.
Dude that car is so cool I've been on the mve exocet band wagon forever I need one in my life lol.
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Old Oct 3, 2017 | 07:37 AM
  #24  
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I have a set of the speedmaster rods that I'm putting in a 6.0 (using the spec engine pistons). They look fine. I will be watching this thread ,as I have considered the crank as well.
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Old Oct 3, 2017 | 03:03 PM
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Originally Posted by Ed Cantu
Put it on the bathroom scale and it says 53.8 lbs remember thats with no reluctor wheel. I got it to the machine shop today so I should know whats goin on with the measurements in the next two days or so.
Fingers crossed.
Thanks lance. Well its going in my cruizer and might see the strip every now n then. Gonna send my 241 heads to lloyd elliot for porting and have him grind me a cam.
Thank you, please keep us update on how your build goes with this crank.
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Old Oct 3, 2017 | 03:21 PM
  #26  
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I'll know by tomorrow about the roundness. Guy said it's looking good. He's wondering why I'm looking for something to be wrong lol.
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Old Oct 3, 2017 | 03:36 PM
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lol u never know. But for the money this crank is hard to beat. Reminds me of when everyone started using the pro comp head studs lol.
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Old Oct 5, 2017 | 11:20 AM
  #28  
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Any updates?
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Old Oct 5, 2017 | 11:38 PM
  #29  
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No not yet the guys have been busy. They were. Cutting my ls1 crank for another project first n finished it today. When I picked it up they assured me that they would have the verdict on measurements tomorrow afternoon.
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Old Oct 8, 2017 | 12:47 PM
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Originally Posted by Ed Cantu
No not yet the guys have been busy. They were. Cutting my ls1 crank for another project first n finished it today. When I picked it up they assured me that they would have the verdict on measurements tomorrow afternoon.
I'm curious to se how it turned out.. and what places charge to install the reluctor wheel.
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Old Oct 8, 2017 | 03:28 PM
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Sorry I got sick and was in bed all day Friday and Saturday. They called me but I was passed out. I'm going by in the morning to talk to them pick up parts and get the verdict. I've seen shops charge 30 bucks or so to install the wheel but I don't know of a shop that uses the tool that's local and I'd prefer they use the tool. Ima call my buddy who I ride dortbikes with he is the service manager at the local Chevy to see if they have one I can borrow. I'm in the process of going all ls in my garage so I think I'm just gonna buy the tool. 200 bucks and if I post in the local forums I'll probably make my money back pretty quick.
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Old Oct 9, 2017 | 11:55 AM
  #32  
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Well guys it seems that the crank passed inspection. No need for anything to be done to it. Not even a polish. All the measurements checked out its straight and indexed properly. It's funny though because after all the stuff you here and not finding anything wrong I wanna Get a second opinion lol. It seems like all that needs to be done is have it balanced and drop it in.
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Old Oct 9, 2017 | 01:33 PM
  #33  
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Default Bob Weight

Hi Ed, good to here.

I would like you to state the new crankshaft current Bob Weight ?
If unknown, call Speedmaster "tech" as they are very helpful.

The Rods/Pistons MUST match weight though that weight may be LESS than the current crankshaft BW.

Lance
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Old Oct 9, 2017 | 01:48 PM
  #34  
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Sorry had to edit I had posted while sitting in traffic.
I haven't gotten the weight checked. I did call speedmaster and although very quick to answer the phone they had no clue what the weight is supposed to be so knowing how close or far to their own spec is gonna be is a no go. The crank had no holes drilled in it like the stock cranks so I'm going assume(hope$) that they need material removed and not added. From what I understand the procomp rods are a bit on the heavy side. I'll be getting the weight checked in the about two weeks or so when I order my rods/pistons and I'll post the results. It's gonna get balanced with a fbody balancer and flywheel.

Based on this though I think I'll most likely be getting another crank to build a motor off of, probably a forged one this time to put in my 900 buck 72 skylark.The machine shop has been really dragging *** resleeving my pst motor. I think I may just sell it and go about getting an ls3 or maybe a lsnext or lsx block to build. The heads on that thing alone were 2500 bare and unfinished. Damn thing still only makes 1000hp n/a. Its super cool to have something thats one off and custom with a hogans intake but pretty dated.

Last edited by Ed Cantu; Oct 9, 2017 at 02:36 PM.
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Old Oct 9, 2017 | 02:18 PM
  #35  
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Yeah, thanks for keeping this updated. I appreciate the info.
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Old Oct 9, 2017 | 03:05 PM
  #36  
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Ed I think someone on LS1TECH or the Corvette Forum rents out a reluctor install tool. I can't recall the name.

Thank you for the info.
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Old Oct 10, 2017 | 10:54 PM
  #37  
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Thanks for the info, I really appreciate it!!
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Old Oct 12, 2017 | 11:01 AM
  #38  
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I appreciate you taking the time to post results. This helps us to stay informed about different products.

But, it is my understanding that this crank is a cast OE replacement type and not a high performance piece. So, if that type of crankshaft is suitable for your needs, why not pick up a good used crankshaft from a junkyard or other source, for say for $50 or so.

This would take the guess work and quality uncertainty out of the equation. Turning the rod journals on a used crank is not too expensive and you know what you have to start from. This crank still needs some machining, does it not?
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Old Oct 12, 2017 | 11:54 AM
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Default Crankshaft Bob Weight = 1850 ?

Hi Ed, I will call ProComp, it would HELP if you provide the Part Number ?

The BW of 1850 is Common with MY Forged Rods/Pistons @ 1835 MATCHED in Weights. (4.00")

Thus a 1% OVER BALANCE which would be great for your needs. (No Balance Costs)

Lance
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Old Oct 12, 2017 | 12:11 PM
  #40  
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Originally Posted by rednari2
I appreciate you taking the time to post results. This helps us to stay informed about different products.

But, it is my understanding that this crank is a cast OE replacement type and not a high performance piece. So, if that type of crankshaft is suitable for your needs, why not pick up a good used crankshaft from a junkyard or other source, for say for $50 or so.

This would take the guess work and quality uncertainty out of the equation. Turning the rod journals on a used crank is not too expensive and you know what you have to start from. This crank still needs some machining, does it not?
This is a stroker crank.
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