360/390 questions
Posting Guru
Joined: Jul 2003
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From: alaska
If I read this forum right , you will need a 390 crank to go with your pistons and rods, that would give you a 390, the heads are probably the same , check the numbers , and a cheap way for more power is a camshaft out of a 60'S 390 from a car . bob
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From: indiana
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Posting Guru
Joined: Oct 2005
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no.. the 428 cranks are externally balanced, therefore you need the crank nose counterweight and 428 specific flywheel. or just get it all zero balanced.
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This is a question I have had for sometime. I am sure someone here can answer it.I am assuming that all f.e. engines have the same basic block and heads, the differances being bore,stroke,pistons, cam, crank,etc. If this is the case, what was the point of creating the 428 when we already had the 427.
Posting Guru
Joined: Oct 2005
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the 427 was created to race pure and simple.. the tolerances were much closer and it was not a production practical engine.. the 428 was easier and more cost effective to build and was quite a bit more streetable.. thats te short answer... lol
Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
You guys are missing something here. There are different types of 390 pistons. There are the car pistons, some with a dish and some with a flat top. Then there are the truck pistons, dished with a low compression height.
Car pistons in a 410 will put the pistons at least .070" above deck at TDC. Not good. The correct 390 truck pistons will be between .010" and .030" below deck at TDC, depending on which manufacturer you choose.
Car pistons in a 410 will put the pistons at least .070" above deck at TDC. Not good. The correct 390 truck pistons will be between .010" and .030" below deck at TDC, depending on which manufacturer you choose.
Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
As far as the short block is concerned, this is what I would do:
1. Get the 428 crank internally balanced. Not really a necessity, but makes things later on so much simpler. (zero balanced flywheel)
2. Recondition the 390 rods and use ARP bolts in 'em.
3. Use 390 truck pistons. This would be the KB-Silvolite #1139, or Summit part number STL-381P.
Then it gets fun with heads, cams, valvetrain, etc. I'll leave that for later.
1. Get the 428 crank internally balanced. Not really a necessity, but makes things later on so much simpler. (zero balanced flywheel)
2. Recondition the 390 rods and use ARP bolts in 'em.
3. Use 390 truck pistons. This would be the KB-Silvolite #1139, or Summit part number STL-381P.
Then it gets fun with heads, cams, valvetrain, etc. I'll leave that for later.