Speedmaster ls1 cast stroker crank.
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.
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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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
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.
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?
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
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?










