rod length?
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
Originally Posted by hotrodfeguy
Just have to match the heavy wrist pins(360) with the light rods(360). Otherwise bal issues come into play. Heavy rod goes with light wrist pins.
Well the reason for the use of the 360 rod is two fold. one they are laying around for nill price wise. Two they offer a higher quench by .060 witch is effective for a wedge engine. Not to mention if you use the light weight pins you could reduce rotating mass, but at a price. Your not going to spin a 360 rod over 6k for too long
Well the reason for the use of the 360 rod is two fold. one they are laying around for nill price wise. Two they offer a higher quench by .060 witch is effective for a wedge engine. Not to mention if you use the light weight pins you could reduce rotating mass, but at a price. Your not going to spin a 360 rod over 6k for too long
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 421
From: Long Island USA
Originally Posted by Beemer Nut
I would like to see a 390 with 360 rods spinning over 6K but from a safe distance.
It's bad enough with a 360's stroke, much less a 390 with the faster piston accelerations...
More Turbo
Joined: Mar 2003
Posts: 578
Likes: 1
From: Green Bay Wi
I have one on the stand right now Ill let you guys know how it works Its going in my 67 F250 4X4 72 360 pistons(62K) C1AE-B (352HP/390) short Rods but skinny like 352/360 and C1AE crank(390) and a No code 70 block STD bore .003 tapper, with a 70 date code. I shaved the pistons down to 9.5:1 CR I pretty much made it from stuff I had laying around. Its my scrappy engine.
Ill let you guys know how it works Its going in my 67 F250 4X4 72 360 pistons(62K) C1AE-B (352HP/390) short Rods but skinny like 352/360 and C1AE crank(390) and a No code 70 block STD bore .003 tapper, with a 70 date code. I shaved the pistons down to 9.5:1 CR I pretty much made it from stuff I had laying around. Its my scrappy engine.
Last edited by hotrodfeguy; Aug 20, 2007 at 09:33 PM.
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Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Originally Posted by hotrodfeguy
Its my scrappy engine.
For a heavy 4 x 4 it's a no brainer to just build a 410 from the start.
What's your time, money and labor worth on said scrappy engine?
Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
With the rod journal area reduced to 89.8% of a standard FE journal you must of had a steel crank. You must of got lucky or had paper thin cylinder walls with possible overheating problems with a 390 block punched out to 4.130" bore. The best part you were thinking on a "how can I do this" with different motor family parts for your build, hats off no chebbie parts were used.
Freshman User
Joined: Jan 2006
Posts: 35
Likes: 0
I don't Know.... It was a standard 390 crank I offset ground. Had to narrow the rods up a little via a grinding machine with a magnetic table. The whole thing ended up being too easy. I have, though, since learned I may have got lucky on the overbore.
Still, this went in a 79 4x4 and was a GREAT motor. Loved lots of timimg even on 87 Octane gas. If I did it again I would use a 428 block. Easy to find arround here as farmers are pulling them off of wells and replacing them with diesels.
Brad
Still, this went in a 79 4x4 and was a GREAT motor. Loved lots of timimg even on 87 Octane gas. If I did it again I would use a 428 block. Easy to find arround here as farmers are pulling them off of wells and replacing them with diesels.
Brad
Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
If they are 428's you might have a thing going and not know it on this forum as many members are looking for those blocks and cranks. Check into it there could be money in it for you as a side job plus many happy forum members.
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Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Now don't tease me! Your correct they would be 427's way before 428's.
I recall one of our members maintains a bunch of 390 pump engines. All I want is a dirty old 427 top oiler with good cylinder wall thickness readings for a future 482 dream motor but not this year cash is tight.
I recall one of our members maintains a bunch of 390 pump engines. All I want is a dirty old 427 top oiler with good cylinder wall thickness readings for a future 482 dream motor but not this year cash is tight.
Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Crank alone is worth $300, no telling the block value.
Any casting numbers on the block that would tell what they are?
What do the freeze plugs look like, standard tin or screw-ins with a big square drive in the center?
Any casting numbers on the block that would tell what they are?
What do the freeze plugs look like, standard tin or screw-ins with a big square drive in the center?
Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
Likes: 2
From: CT
That's a pretty good deal on the 428's. Beem is right if you can scoop them up for that price you can make a little side cash. There's been quite a few guys to do that over the last few years. They cornered the market on 70's era 428 industrial shortblocks. Blocks were 70's era 428 castings from DIF. HD webbing and cranksaddle area, IUB CJ cranks, HD CJ rods and stock cast CJ pistons.
Carl if I hear of any 427's out your way I'll pass the info along. I see them once so often but have been more 428's recently.
Carl if I hear of any 427's out your way I'll pass the info along. I see them once so often but have been more 428's recently.
Thread Starter
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New User
Joined: Aug 2007
Posts: 15
Likes: 0
From: metro Phoenix, AZ
Hi Everyone!!
Just wanted to say thank you to all of you who shared info, asked questions and even pm'd us! You guys gave us a lot of info and though we didn't answer all the questions that came up, we feel better prepared to make decisions as to what to do next.
It took me a while to post as we were dealing with big 40 birthday celebrations and I had to get Jeff off on his hunting trip!! He's gone, and sadly in the little Jeep Cherokee instead of his "baby".
I appreciate everything, especially your patience in helping those of us who have just enough information to be dangerous become more educated!!
Patti
Just wanted to say thank you to all of you who shared info, asked questions and even pm'd us! You guys gave us a lot of info and though we didn't answer all the questions that came up, we feel better prepared to make decisions as to what to do next.
It took me a while to post as we were dealing with big 40 birthday celebrations and I had to get Jeff off on his hunting trip!! He's gone, and sadly in the little Jeep Cherokee instead of his "baby".
I appreciate everything, especially your patience in helping those of us who have just enough information to be dangerous become more educated!!
Patti