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SBM 3.79" crank
#3205764
01/17/24 08:49 PM
01/17/24 08:49 PM
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Joined: Apr 2004
Posts: 324 Northport, al.
tvt59
OP
enthusiast
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OP
enthusiast
Joined: Apr 2004
Posts: 324
Northport, al.
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Has anyone done a SBM with a 3.79 crank and 6.50" rods? If so how did you like it?
Nothing worth anything comes easy. It is always harder to do the right thing.
My Grandfather
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Re: SBM 3.79" crank
[Re: tvt59]
#3209089
01/29/24 09:52 PM
01/29/24 09:52 PM
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Joined: Jan 2003
Posts: 6,138 Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,138
Melbourne , Australia
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Has anyone done a SBM with a 3.79 crank and 6.50" rods? If so how did you like it? You have 6.5" rods lying around, or are you getting them made for the engine? I bought a 360 years ago when I knew much less, it had 6.625" long rods in it. It's not an endeavour I've sought to replicate.
Last edited by LA360; 01/29/24 10:34 PM.
Alan Jones
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Re: SBM 3.79" crank
[Re: LA360]
#3209246
01/30/24 04:31 PM
01/30/24 04:31 PM
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Joined: Jan 2003
Posts: 9,875 Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,875
Weddington, N.C.
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Didn't they make the 3.79 so you could use a 360 standard OEM piston and get high compression For a .060 over 360?
Or a .020 over 340 I suppose would work too.
If an OEM 8:1 360 is about .0100 in the hole the math works out to very close to zero deck using the OEM rod.
Or maybe they made it to run a SBC CH piston in the 9.2 deck R block? I'm sure there's a combo that works using an off the shelf slug.
I built a 440" W2 360 (4.25" CRANK) and used an off the shelf SBC chevy 'claimer' Race piston @ ~1.28" CH and the slug was super light, I think my bobweight was right around 1800
Last edited by Streetwize; 01/31/24 05:53 PM.
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Re: SBM 3.79" crank
[Re: LA360]
#3209623
01/31/24 07:06 PM
01/31/24 07:06 PM
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Joined: Apr 2004
Posts: 324 Northport, al.
tvt59
OP
enthusiast
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OP
enthusiast
Joined: Apr 2004
Posts: 324
Northport, al.
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Molnar has them in stock.
Nothing worth anything comes easy. It is always harder to do the right thing.
My Grandfather
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Re: SBM 3.79" crank
[Re: tvt59]
#3209697
02/01/24 01:01 AM
02/01/24 01:01 AM
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Joined: Jan 2003
Posts: 6,138 Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,138
Melbourne , Australia
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You've got nothing to lose really. The rods are about 35 grams heavier than a 6.125" rod. With the right piston, you should be able to get something around the 450 grams mark. Put a decent wall thickness wrist pin and modern ring package in it and you'd be good to go.
Alan Jones
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