Edelbrock SB 318/360 heads on a 340
#1003423
05/31/11 09:15 AM
05/31/11 09:15 AM
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Joined: Jan 2003
Posts: 9,982
Ansonia, CT
CJK440
OP
master
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OP
master
Joined: Jan 2003
Posts: 9,982
Ansonia, CT
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I'm working on a buddies 340 motor. He picked up some edelbrock SB heads cheap but not the 340 specific ones and sure enough he's got pistons that hit with an .039' gasket.
I'm guessing the only solution other than trading for the right heads (or pistons) would be to set the heads on a mill and cut an open chamber to clear. I'm guessing this is all Edelbrock does? They "make" a 340 head by just milling a std head?
If so, what would I want to shoot for for quench?
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
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Re: Edelbrock SB 318/360 heads on a 340
[Re: 11secaarcuda]
#1003428
05/31/11 06:43 PM
05/31/11 06:43 PM
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Joined: Aug 2007
Posts: 498
El Dorado Ca
65signet
mopar
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mopar
Joined: Aug 2007
Posts: 498
El Dorado Ca
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Head gasket will fix it, we run the 318 head on a 340 with the piston out of the deck.
1965 Plymouth Barracuda 273 M/SA
1970 Plymouth Duster 360/904 10.60s with J heads
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Re: Edelbrock SB 318/360 heads on a 340
[Re: 65signet]
#1003430
05/31/11 07:23 PM
05/31/11 07:23 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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How thick is your gasket and if you measured, how much piston to head clearance do you have? Thanks........
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Edelbrock SB 318/360 heads on a 340
[Re: D-50]
#1003431
05/31/11 08:58 PM
05/31/11 08:58 PM
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Joined: Jan 2003
Posts: 9,982
Ansonia, CT
CJK440
OP
master
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OP
master
Joined: Jan 2003
Posts: 9,982
Ansonia, CT
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I think a thicker gasket of course would be the easiest but any concerns with intake/head matchup?
I don't have the motor here but he and his neighbor is saying the supposed .039 gaskets measure .030 and the piston is .028 out of the hole.
We decided to pull the whole motor and go thru the bottom end just for piece of mind. It was in the car when it was bought but no info on it at all. If the bores are all ragged out and it needs an overbore along with new pistons, than its simple...
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
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Re: Edelbrock SB 318/360 heads on a 340
[Re: CJK440]
#1003433
06/02/11 05:49 PM
06/02/11 05:49 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
Me too, thicker gasket, no biggie.
To get anything thicker than an .039" I'll have to step up to an MLS or ICS Copper gasket right?
I'd really like to keep it simple with a composition gasket.
Once I get ahold of it I'll know for sure but I suppose I can flycut the piston tops a bit and then have it rebalanced. Who knows if it ever was done before so I'd think it might be money well spent.
the fel-pro's that come in a standard 318/360 rebuild kit are .054" thick compressed. if your pistons are the (IIRC) spec .018" out of the hole, that would leave .036" quench, which is tight, but OK
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1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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