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Old 06-08-2003, 09:11 AM
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Post 400 Combinations

Please refresh my memory.
400 block + 350 crank + 5.7 rods = 377 cu
400 block + 400 crank + 400 rods = 400 cu
Would they use the same piston?

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Old 06-08-2003, 10:25 AM
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Your calculation are correct, but don't forget the best one 400 block + 400 crank + 350 rods = 406 cu

I do believe that they all basicly use the same pistons.
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Old 06-08-2003, 11:31 AM
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I believe you need 2 different pistons. 400 rods are 5.565 in length(correct me if I am wrong) and the 350 is 5.7 And a 406 is a 30 over 400 with stock 400 rods which 350 rods can be used but different pistons are needed for the increased rod length
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Old 06-08-2003, 11:32 AM
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[quote]Originally posted by MI2600:
<strong>Please refresh my memory.
400 block + 350 crank + 5.7 rods = 377 cu
400 block + 400 crank + 400 rods = 400 cu
Would they use the same piston?</strong><hr></blockquote>



These two combinations could use the same pistons.

BUT a 400 with a 400 crank and 5.7 pistons require a different set. The 5.7 (350 rods) will push the stock 400 pistons out the top of the block.

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Old 06-08-2003, 11:38 AM
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what about the 350 chevy should have built, 400 block, 327 crank (bearing spacers) and Ford 300 straight 6 rods, (6.205 long and 12 bucks a piece from PAW)
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Old 06-08-2003, 01:35 PM
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rods shouldn't have any connection(no pun intended) to cubic inches. only bore and ,stroke, plus number of cyls.
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Old 06-08-2003, 05:27 PM
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Sorry you are correct you do need differant pistons for the 406, that was kind of a lame response from me, and to make it even worse I am in the middle of building a 406, however I will have the correct pistons. LOL
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Old 06-10-2003, 06:17 AM
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400 Build????'s

what about the 350 chevy should have built, 400 block, 327 crank (bearing spacers) and Ford 300 straight 6 rods, (6.205 long and 12 bucks a piece from PAW)

Whats this? What combo would this make? I am getting ready for another school year and we need an engine project, I have never heard of this combo. What are the specs on this set up as far as HP and TQ and RPM's.

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Old 06-10-2003, 10:04 AM
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Hey Deuce_454,
Give us a little more info please. I like the 400 blocks. What heads would you recommend and what hp are we shooting for?
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Old 06-10-2003, 03:12 PM
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You can find the engine build that Duece is taking about in one of the magazine archives. I believe it was Super Chevy or Chevy High Performance. The combo made better power than an stock 350 chevy. It was a build to prove that the longer rod ratio would make more power with no other changes. I have the article saved somewhere on one of my computers. I will try to find it this weekend if this thread is still active and I remember.

Chris
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Old 06-10-2003, 03:29 PM
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358 cui chevy

send me an e-mail at jakob@regeur.dk and ill mail a .pdf file of the buildup to whoever is interested, it is easier than copying 5 pages of article into one post no one will read.
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Old 06-10-2003, 11:15 PM
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Those Ford 6 rods were modified to work on the 327 crank, & required custom pistons. What about an off-the-shelf 6.25" rod & a 6"rod 400 piston? 1.625"+6.25"+1.13"=9.005"
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Old 05-12-2006, 06:34 PM
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re 400 combinations

400 block, stock bore w/ 327 crank = 348 cu in, world champion carrol caudle ran this combo in the early 70's and was good for gobs of power at 9,000 rpm. He ran C modified Production in the "old" NHRA. lots of wear at that rpm with siamesed bores of the 400 block. not much of a street engine, little low end or mid range torque.
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Old 05-12-2006, 06:42 PM
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400 combinations

TRW or Federal Mogul used to make a bearing just for this swap: 400 w/ 327 crank, don't know if they are still available though.
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Old 05-12-2006, 07:03 PM
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Taken from the Knowledge Base,
Here is a site with 100 combos & stats.
http://www.ryanscarpage.50megs.com/combos1.html
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