Re: SB stroker options for track car
[Re: AndyF]
#432207
08/09/09 01:21 PM
08/09/09 01:21 PM
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Joined: Jan 2003
Posts: 5,487 SoCal
Brian Hafliger
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SoCal
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I would use a Scat 4" crank, 360 mains if your sticking with the stock block. Your not saving a ton with chevy rods and pins IMO. What kind of cam (FT or roller or hyd roller)are you planning? RPM? Any rules? I love building road race and circle track engines...they are a nice challenge and fun to watch go around the track. Still waiting for my book Andy LOL!!
Brian Hafliger
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Re: SB stroker options for track car
[Re: AndyF]
#432208
08/09/09 01:35 PM
08/09/09 01:35 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Go with the cubes, I'd use a 340 base for the bigger bore. Something in the 4.10 gear range with a 28" tire You might even offset grind a 4.0 Mopar crank
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Re: SB stroker options for track car
[Re: MR_P_BODY]
#432210
08/09/09 01:48 PM
08/09/09 01:48 PM
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Joined: Apr 2005
Posts: 1,880 USA
Ron Silva
top fuel
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top fuel
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USA
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http://www.ohiocrank.com/mopar_cranks.htmlWatch the scat cast cranks, because the back flange could be machined too far back. I have heard from several different places about this and problems arising from it. AND: the crank in my 406 Crate wiped out the thrust bearing/flange because of this. You end up with insfficient "converter pull up" and when the engine runs and is warming up and things start to expand it binds up and the problems start. I belive the crank in this Crate motor is a scat cast crank.
SRT DEMON ONE SEAT
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Re: SB stroker options for track car
[Re: Brian Hafliger]
#432215
08/09/09 05:37 PM
08/09/09 05:37 PM
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Joined: Jan 2003
Posts: 31,200 Oregon
AndyF
OP
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Quote:
I would use a Scat 4" crank, 360 mains if your sticking with the stock block. Your not saving a ton with chevy rods and pins IMO. What kind of cam (FT or roller or hyd roller)are you planning? RPM? Any rules? I love building road race and circle track engines...they are a nice challenge and fun to watch go around the track. Still waiting for my book Andy LOL!!
Book is in the mail. This track motor is for the second book. I'd use the SCAT forged crank in a heartbeat if it had the Chevy pins on it. Last time I talked to Tom at SCAT he wasn't too interested in putting Chevy pins on their cranks for some reason. I tried to explain the benefits but his mind seemed to be made up. I could call him back and try again I suppose.
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Re: SB stroker options for track car
[Re: AndyF]
#432216
08/09/09 05:47 PM
08/09/09 05:47 PM
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Joined: Oct 2003
Posts: 11,702 W. Kentucky
justinp61
I Live Here
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I Live Here
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W. Kentucky
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Quote:
Quote:
Andy, the forged 4" K-1 crank in my 360 has 2.10" chevy journals. I'm running 6.125 Comp Star rods, Diamond shelf pistons with a .927" pin.
Cool, that is exactly what I'm looking for. I had forgot about K-1. That is precisely the combo I was thinking about. Justin, did you keep a record of what the bobweight was? Did that K-1 crank balance internally?
Andy, sorry I honestly don't recall the bob weight, I'll check my reciepts to see if it's on one of them. It balanced internal with no mallory, actually there are several holes drilled in it .
The rotating assembly came from Dram, he could probably give you a good idea of the bob weight.
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Re: SB stroker options for track car
[Re: AndyF]
#432217
08/09/09 05:53 PM
08/09/09 05:53 PM
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Joined: Nov 2004
Posts: 3,547 Syracuse,NY
CompWedgeEngines
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Joined: Nov 2004
Posts: 3,547
Syracuse,NY
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I believe your ok now with the current K1's. The early batches of the 360/2.100 cranks were a little light on the counterweights and some combos did need mallory. I think that has been addressed and corrected. They should have them in stock.
What you want is a : 360-4000FB6F
I have usde and sold a fair amount of K1's and also like the Scats very much, but they just dont seem to want to listen on the 2.200 and 2.100 rod pins. They are REALLY missing the boat. I know several people have approached them on it, and they just dont get it.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: SB stroker options for track car
[Re: AndyF]
#432219
08/09/09 07:46 PM
08/09/09 07:46 PM
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Joined: Apr 2005
Posts: 1,880 USA
Ron Silva
top fuel
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top fuel
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Posts: 1,880
USA
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If they won't give you chevy pins I would just go down the road. I have not run a Mopar rod in probably over 15 years. I put chevy rods in my first stroker motor before they were even very popular, and every one since.
SRT DEMON ONE SEAT
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Re: SB stroker options for track car
[Re: AndyF]
#432222
08/10/09 12:00 AM
08/10/09 12:00 AM
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Joined: Jan 2003
Posts: 5,487 SoCal
Brian Hafliger
master
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master
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Posts: 5,487
SoCal
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Quote:
Quote:
I would use a Scat 4" crank, 360 mains if your sticking with the stock block. Your not saving a ton with chevy rods and pins IMO. What kind of cam (FT or roller or hyd roller)are you planning? RPM? Any rules? I love building road race and circle track engines...they are a nice challenge and fun to watch go around the track. Still waiting for my book Andy LOL!!
Book is in the mail. This track motor is for the second book. I'd use the SCAT forged crank in a heartbeat if it had the Chevy pins on it. Last time I talked to Tom at SCAT he wasn't too interested in putting Chevy pins on their cranks for some reason. I tried to explain the benefits but his mind seemed to be made up. I could call him back and try again I suppose.
There just isn't any really huge bene from the chevy stuff. Just go with that crank, I beam rods and a nice lightweight piston and your done. There is some HP in ring pack and bore finish, and even skirt design.
I think it would be cool to do a magnum type build with edelbrocks mag head. JMO...LOL! Oh, and I can't wait to read the book!! I owe you twice now...
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