I got the block dropped of today to see how far I need to hone so I can order the pistons. Dss makes .005 .010 and .017 over but if I need to go that far i don't think it would be good with boost. The cilinders are in really good shape so hopefully it stays the minimum.

 

https://ls1tech.com/forums/parts-cla...l#post19468504

 

Thanks paul but I plan on using it more than one in the future for I'm just gonna buy one. It'll pay for itself soon enough.

AND NOW THIS!



Haven't decided on rails or injectors yet but after talking with lloyd I ditched the 241 idea got a set of 317's and decided on a different piston to put compression around 9.1:1. Olsen said his pulley set up should produce around 9-10# of boost.

 

https://ls1tech.com/forums/generation-iii-internal-engine/1883003-pics-included-took-my-oil-pan-windage-off-5-3-seen.html#post19751379

another reason to be careful of what you get from the yard. Sure you can clean it up but the cost will kill you vs new parts.

 

I'm glad to hear the good results. I ordered this same crank a few months back with the intent on doing budget friendly 416 LS stroker. I already have an iron block that's been bored to 4.065 and ran LS3 internals for the last 60k miles. I haven't gotten around to taking it to the Machine Shop yet since the engine is still in my truck. This is great news

 

Well when its time please do take it. I'd like to see what your "straightness" measured out to. I said it was straight because the Forman and the owners son who came out to ask me why I had it checked said she was perfect. Just opened up the box today to oil and wrap it up with bubble wrap, found the card the machinist left on the crank. Everything was perfect but the straightness was marked .001". I'm not a machinist so isk maybe that's ok.

 

I’m wrapping up a 434” build currently. I’m running a compstar 4” crank, which I checked, AND I had my machinist check it when he balanced it. We spent a few days on getting my main bearings clearances correct, so the crank was checked out well. My compstar (China) was out the same as yours (.001”) for straightness, which is actually common. I’d say 98% of cranks never even get looked at in that area...no worries man.

 

Thanks I looked it up and found the same thing you said to be true. When i took it in I asked specifically for straightness lol I always have. I don't remember who told me years ago to always ask so I always have but no one ever stuck a tag on it with the measurement. My old machinist was a great guy but will sadly no longer do my performance stuff. He says he's to old and doesn't have the time. I've been working with these guys for two years now and everything has been top notch they do all the local industrial stuff as well like big as trucks caterpillars n such.

 

Subscribing

Thanks OP for sharing!

 

I'm curious how that crank holds up the added tension on the snout of the crank from the CTSv supercharger.

I've made 1200hp+ on a $100 stock Cast LS1 crank, Compstar rods, Wiseco pistons with a turbo for years and hundreds of 1/4 and 1/2 mile passes. But that is a GM crank which I feel is better quality. 7800rpm many times for shift points.

 

Well I had some junk to deal with, the gf laid her bike down while we were out riding last week and it was pretty bad. Still in the hospital. Some stuff has changed with the build. The aluminum block needs to go .015 over to clean up so thats not gonna happen. Picked up another 4.8 for 100 bucks and its going to machine shop in the next few days. Now I get to use dss standard bore pistons and the iron block will do well with the boost.

 

anything new??

 

Yeah, any updates...???

 

Well, just for grins I tried to find this crank listed.
Not on Speedmaster site.
Not on their ebay store.
And not in the Jeg's catalog.

So perhaps they just built a few and pulled it from the market?

Ron

 

Sry the project has kinda taken a back seat to finishing my alchohol injected 355 for the 59. I got the balanced assembly back from the machine shop weeks a long time ago along with the block. It according to them it balanced well with no issues. I need to order gaskets rings and bearings before I get back to it. Also still waiting on heads for her.

 

Thanks for the secret code Ed.
Not in stock at Jegs, but they can ship in a couple of weeks.
Looks like a price increase to $254, still cheap.

Good to hear yours balanced up well.

Will be interesting to hear how the bearing clearances come out.

Thanks again.

Ron

 

I bought one of these pce276.1113 4.100" cranks and put it in my ls1 block last night.

I bolted on a rod using stock bearings and it felt like the edge of the bearing was touching the radius on the crank. No surprise since the description said narrow or chamfered bearings would be required.

The big surprise was when I tried to bolt the second rod to the crank........

The rod would not fit next to the first rod

The rod journals are only 43mm wide on this crank. A stock LS crank is closer to 48mm wide. It looks like I will need narrow rods to use this crank. The front of the crank is stamped LS-1-4150 which made me think it may have been misboxed and could be a 4.150 stroke. I put a piston on the rod to check the stroke and sure enough it is 4.150 stroke.

I will call them on Monday to see what rod would work with this crank.

 

You don't want a rod that will work with that crank if you have an LS1 block with stock sleeves. 4" is the limit, anything more you will pull the piston too far out of the hole and it will rock.

 

That's not really true of current piston designs. My 4.250" stroke combo has as much rock at BDC as a 4" stroke combo.

 

Ed, any updates on the Speed master build?

Thank you