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Post by 442scotty on Mar 3, 2011 21:53:34 GMT -5
I have a chance to get a 65 400 short block. It has already been bored .040 and needs to be done again. My question is...what is the max I can do on this block. there are some scratches in the cyls....gonna be at least .060... Should I go for it?  |
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Post by Deleted on Mar 4, 2011 8:24:28 GMT -5
Have it sonic checked first should not be a problem. Also if you can bore it .057 you can use 350 pistons-save a few $$$. Double check my figures with your shop if this interests you.
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Post by Deleted on Mar 4, 2011 9:33:47 GMT -5
You can do the .057 350 piston thing, or go a full bore and use 425 pistons. Remember to INSIST that your machinist uses torque plates while machining. also remember your dancing on the edge here cooling wise, any overheat is probably going to cause cylinder distortion and piston drag, turning this block in to a boat anchor. Makes more sense to start with a 425, or 455 block, unless your just looking for the "B" for correctness
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Post by Deleted on Mar 4, 2011 13:15:40 GMT -5
After thinking over my reply to your post I realized I did what I find very prevalent on most sites, I never answered your question completely. Since I tend to ramble on, I`ll keep it short (at least for me)
"Should I go for it"
Unless your very well versed on cam selection/installation, timing events, compression requirements for fuel available, carb/intake matching. Short answer----- NO
Remember, for every action there is a reaction.
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Post by 442scotty on Mar 4, 2011 15:42:31 GMT -5
I was really just looking at it as a stock backup for mine...found out that if its over .060 I can get it sleeved for a reasonable price...
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Post by Deleted on Mar 4, 2011 16:27:37 GMT -5
I was really just looking at it as a stock backup for mine...found out that if its over .060 I can get it sleeved for a reasonable price... I understand it`s hard to resist, I`m going thru the same thing, I have an engine, it should be rebuilt as a backup. In my case, backup to an engine that will never need a backup? These 400`s come up often enough where you should be able to find a good rebuild-able core. Unless of course your thinking yours is gonna grenade on you, rebuild what you`ve got when the time comes. In my opinion a sleeved engine SUCKS SNOT !!! I`ve seen way too many fail. |
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Post by 442scotty on Mar 4, 2011 16:49:40 GMT -5
I agree they do come up from time to time. I was talking to Bill at BTR Performace..He didnt seem to think sleeves were a big deal and to tell you the truth I have not heard anything good or bad about them...I hope my engine never blows..only has 45k but you never know..
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Post by Deleted on Mar 4, 2011 18:18:21 GMT -5
My opinion only.
Good builder, probably no problems. I just believe liners are for tractors, or blocks built for liners. The 400 "A" block isn`t exotic enough to salvage in lieu of peace of mind.
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Post by chadman on Mar 6, 2011 21:18:54 GMT -5
My 400 B block is .125 over. Believe me, .060 won't be a problem.
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Post by Deleted on Mar 7, 2011 5:39:34 GMT -5
When I had my B block sonic checked, my guy said I could easily go .125 over so bore thickness seems to be a non issue. I have a 505 that is a 454 .125 over and it never minds the 450 two stage shot of spray anb there is zero concrete in the block. But some 454s can't do a .60 without sleeving it. Get it checked.
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Post by 442scotty on Mar 7, 2011 10:15:47 GMT -5
Will do
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