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SB 4125 K1 CRANKSHAFT
#866540
11/29/10 04:07 PM
11/29/10 04:07 PM
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Joined: Nov 2006
Posts: 370
Queensland Australia
moparmacka
OP
enthusiast
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OP
enthusiast
Joined: Nov 2006
Posts: 370
Queensland Australia
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Has any one fitted one of these 4.125 cranks to an engine. What sort of quality are they? Any reliability issues with this stroke? Also what is the best length rod to use? I was thinking 6.200". Chasing around 440 cubes from a siamese 340 resto block. Comments please. Thanks Macka 
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Re: SB 4125 K1 CRANKSHAFT
[Re: moparmacka]
#866541
11/29/10 04:35 PM
11/29/10 04:35 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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6.375" for running Normally aspirated with a W style layout intake valve at 2.10 diameter and 4.125" bore.
6.200-6.250 for running nitrous with a larger than 2.15 valve diameter and bore starting at 4.155".
The deciding factor will be the valve layout on your heads and the bore of the piston you run. You can run .060" Valve pocket to ring groove NA. You need to be around .150" if you are running a power adder. This Valve pocket to ring groove is everything on the small block.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: SB 4125 K1 CRANKSHAFT
[Re: sixpackgut]
#866553
11/29/10 10:44 PM
11/29/10 10:44 PM
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Joined: Mar 2010
Posts: 341
Highland beach Fl
poisondart2
enthusiast
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enthusiast
Joined: Mar 2010
Posts: 341
Highland beach Fl
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Quote:
Quote:
I have one, I think  ask Dan he should be setting mine up to fit my block 
A HA!! i knew you were up to something with all the smack talk
Ray did you miss he had a block at Dans? Have you ever seen the size of the steam rollers on his car? Bigger engine was needed to turn them, plus I think Tony is going to set Dans pinion angle in trade and possibly put a 9 inch in. 
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Re: SB 4125 K1 CRANKSHAFT
[Re: poisondart2]
#866554
11/29/10 11:05 PM
11/29/10 11:05 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
Quote:
I have one, I think ask Dan he should be setting mine up to fit my block
A HA!! i knew you were up to something with all the smack talk
Ray did you miss he had a block at Dans? Have you ever seen the size of the steam rollers on his car? Bigger engine was needed to turn them, plus I think Tony is going to set Dans pinion angle in trade and possibly put a 9 inch in.
I wouldn't touch Dans pinion angle with a 10 pole 
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Re: SB 4125 K1 CRANKSHAFT
[Re: sixpackgut]
#866557
11/29/10 11:21 PM
11/29/10 11:21 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
Quote:
Quote:
I have one, I think ask Dan he should be setting mine up to fit my block
A HA!! i knew you were up to something with all the smack talk
Ray did you miss he had a block at Dans? Have you ever seen the size of the steam rollers on his car? Bigger engine was needed to turn them, plus I think Tony is going to set Dans pinion angle in trade and possibly put a 9 inch in.
i made a comment in that post and Quicktree lied like a grudgracer
not me 
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Re: SB 4125 K1 CRANKSHAFT
[Re: Performance Only]
#866559
11/29/10 11:27 PM
11/29/10 11:27 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
I have one, I think ask Dan he should be setting mine up to fit my block
yes, i have yours and a couple others. we've already had yours in the grinder to check index, stroke, taper and out of round. i don't see how any crank could measure any better than this one did. K-1 is doing an outstanding job on their stuff.
aside from a litle extra time to check it all out, they really make my job a lot easier when it comes to putting all the pieces together. 
thats great but im still not messing with your pinion angle 
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