Re: Critique my 340 build please ........
[Re: RebelDart]
#101519
08/08/08 03:31 PM
08/08/08 03:31 PM
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Joined: Feb 2004
Posts: 4,501 Gainesville,FL
goldmember
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master
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Posts: 4,501
Gainesville,FL
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Sounds like a nice streetable combo.My experience is with 360 and larger small blocks,I don't see any problem with your plan.I'd consider having the heads milled to get the compression up a bit,if the chambers are really 75cc. What machine shop are you using?
Last edited by goldmember; 08/08/08 03:36 PM.
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Re: Critique my 340 build please ........
[Re: RebelDart]
#101527
08/08/08 07:01 PM
08/08/08 07:01 PM
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Joined: Jan 2003
Posts: 8,144 Arkansas
340727dart
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If you're using a head gasket with 0.039" compressed thickness, you should still have plenty of piston to head clearance with the iron heads. IIRC, the chambers are about 0.100" or more deep. I've got that same cam in my 340 and love it. My pistons are 0.020" above the deck and I have plenty of piston to valve clearance. But the KB pistons have pretty generous valve reliefs. That's the clearance you need to be concerned about.
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Re: Critique my 340 build please ........
[Re: RebelDart]
#101529
08/08/08 07:52 PM
08/08/08 07:52 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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Posts: 36,040
Lincoln Nebraska
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1st need ALL measurements: piston amt in/out of hole(deck height),amt(cc's) of piston dome, cc's of valve reliefs, CC's of heads,depth of open chamber recesses. So you can machine to achieve .035-040 quench & the CR you need(& 9.2 isn't enough) which will go with determining what head gasket you need & wondering what octane FUEL will you be useing? Thats too bad they are not being customer friendly but unfortunately that is all too common. Stay with it,you want this thing right.
live every 24 hour block of time like it's your last day on earth
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Re: Critique my 340 build please ........
[Re: UCUDANT]
#101530
08/08/08 08:26 PM
08/08/08 08:26 PM
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Joined: Apr 2007
Posts: 4,233 petaluma,ca. u.s.a.
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petaluma,ca. u.s.a.
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Quote:
If the pistons are .030 out of the hole I think your compression might be higher than you calculated. I think a 70 340 piston was .018 out of the hole and compression is rated over 10 to 1. How big are the relief's in those pistons? Heads might be 72cc
i'm not an engine wizzard by any means but this is what i was thinking half way throuh your post.
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Re: Critique my 340 build please ........
[Re: RebelDart]
#101534
08/09/08 12:17 AM
08/09/08 12:17 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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Circle Track
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Lincoln Nebraska
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[quote The TRW's we're using L2316F)have a 7.5cc relief. If I have to shave - so be it, but I need the compression so not sure the best route to take. You will be milling the heads & probably not the dome. this calculator is very nice. http://kb-silvolite.com/calc.php?
live every 24 hour block of time like it's your last day on earth
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