Re: .020 400 block question
[Re: rbkt65]
#2724967
12/17/19 10:35 PM
12/17/19 10:35 PM
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Joined: Jan 2012
Posts: 2,649 Stuttgart, Arkansas
rickseeman
master
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master
Joined: Jan 2012
Posts: 2,649
Stuttgart, Arkansas
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I don't really know what he is saying. If it's .020 over and it needs a bore job, 440 Source (and probably others) has .035 stroker kits.
2011 Drag Pak Challenger
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Re: .020 400 block question
[Re: rbkt65]
#2724984
12/17/19 11:28 PM
12/17/19 11:28 PM
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Joined: Aug 2003
Posts: 43,190 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,190
Bend,OR USA
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If I was you I would have that block sonic tested by a good shop before making any choices on using it or not It is very possible it is useable but you won't know until it is tested If it will have less than .120 thick anywhere in the cylinder walls after boring and honing look for another, better block
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: .020 400 block question
[Re: Cab_Burge]
#2724999
12/18/19 12:13 AM
12/18/19 12:13 AM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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My 400 block (73 230 std web casting) is .040 over.... don’t understand what the problem is. “Only .020” from where he wants it”.... first: what does that mean??? Second: why would that stop him from going there?
Are you sure you’re understanding him properly?, or are you sure he’s understanding what you want to do?
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: .020 400 block question
[Re: rbkt65]
#2725185
12/18/19 06:39 PM
12/18/19 06:39 PM
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Joined: Jan 2003
Posts: 31,037 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,037
Oregon
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i revisited the machine shop and andy f is exactly correct in what he stated. so on to another block. thanks all and happy holidays. That is why they pay me the big bucks to answer questions on here.
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Re: .020 400 block question
[Re: AndyF]
#2725189
12/18/19 07:10 PM
12/18/19 07:10 PM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,499
So. Burlington, Vt.
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I guess I still don’t understand the problem exactly.
The common bore size for those blocks is 4.375. If it’s currently +.020 the bore is 4.363. .012 is not a problem to hone out at all, unless you’re using a hand held type of hone. Any power stroke hone would make short order of that job.
Now, if the wear at the top of the ring travel is already beyond 4.375, then you’d really want to sonic test the block first, and use a larger bore size(4.380 or 4.390). But then you’re likely looking at custom pistons as well.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: .020 400 block question
[Re: rbkt65]
#2725190
12/18/19 07:13 PM
12/18/19 07:13 PM
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Joined: Mar 2003
Posts: 1,449 Martinsville, IN
cdwmotorsports
pro stock
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pro stock
Joined: Mar 2003
Posts: 1,449
Martinsville, IN
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I'm curious as to why a machine shop wouldn't be able to bore a block out. I understand Andy said the machine, so I guess my question is what is the machines problem/ or lack of ability? rbkt65 if youd be interested in selling that block please contact me.
eBay-cdwmotorsports
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Re: .020 400 block question
[Re: fast68plymouth]
#2725200
12/18/19 08:03 PM
12/18/19 08:03 PM
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Joined: Aug 2011
Posts: 2,861 Pattison Texas
CSK
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master
Joined: Aug 2011
Posts: 2,861
Pattison Texas
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I guess I still don’t understand the problem exactly.
The common bore size for those blocks is 4.375. If it’s currently +.020 the bore is 4.363. .012 is not a problem to hone out at all, unless you’re using a hand held type of hone. Any power stroke hone would make short order of that job.
Now, if the wear at the top of the ring travel is already beyond 4.375, then you’d really want to sonic test the block first, and use a larger bore size(4.380 or 4.390). But then you’re likely looking at custom pistons as well. My source kit came with 4.380 pistons
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: .020 400 block question
[Re: rbkt65]
#2725353
12/19/19 11:38 AM
12/19/19 11:38 AM
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Joined: Aug 2003
Posts: 43,190 Bend,OR USA
Cab_Burge
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I Win
Joined: Aug 2003
Posts: 43,190
Bend,OR USA
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I've built a bunch of 400 block motors with 3.750 stroke up to 4.300 stroke crankshafts, all but the first one where sonic tested by me after having the first block crack the #1 cylinder wall on the camshaft side of the cylinder wall while breaking in the cam on a engine dyno it was right at .035 thick after prying apiece out of it while I having it bored out for a ductile iron sleeve That block was not salvable due to much core shift on the drivers side What I have found in the past on bore size is the lack of a good set of piston rings after you get above 4.380 bore size 4.440 bore size rings are available but not many stock blocks will be safe at that size My first pump gas 400 stroker motor (511 C.I.) I built for myself ended up with four ductile iron sleeves in it due to deck damage between the #4 and #6 cylinders due to a blown head gasket torching that out, #1 and #7 had to much pitting in them to clean up at 4.375 bore size so I had the shop sleeve all four at the same time due to not being able at that time to find another block in SO CA back in 2001 That motor made a bunch of power and took a lot of abuse by me on the track and street on pump gas, it had a set of ported big valve 906 heads with 9.25 to 1 compression ratio to start with and it made 612 HP at 5500 RPM and 644 Ft. Ls. at 4500 RPM with a low deck six pack. I ended up swapping heads several times and crankshaft stroke once to 4.300 stroke (517 C.I.) to make it make more power, it ended up with a set of Indy SR M.W. intake ports with a 400-3 intake and a 1050 CFM Holley Dominator, that combination made 727 HP at 7000 RPM and around 680 Ft . Lbs. of torque with 10,78 to 1 compression using Oregon 91 octane non ethanol pump swill. That combination ran a best of 9.993 at 134.+ MPH corked up with the air cleaner on in my old street Duster weighing 3450 Lbs. with me in it, it ended up being way faster than I expected Test, test and test some more, don't be afraid to try something different to make more power My current S/P bracket 400 cold weather block that I bought form AndyF on here ended up only needing being bored to 4.350 to straighten out the bore That motor has pushed my 1970 S/P chrome moly tube chassis Cuda (2750 lbs with me in it) (517 C.I.) to 5.50 at 120.+ MPH in the 1/8 mile and 8.886 at 150.+ MPH in the 1.4 mile so far IHTHs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: .020 400 block question
[Re: Cab_Burge]
#2725607
12/20/19 12:25 PM
12/20/19 12:25 PM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,499
So. Burlington, Vt.
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I see rings listed for: 4.380, 4.385, 4.390, 4.395, 4.400
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: .020 400 block question
[Re: fast68plymouth]
#2725609
12/20/19 12:29 PM
12/20/19 12:29 PM
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Joined: Aug 2003
Posts: 43,190 Bend,OR USA
Cab_Burge
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I Win
Joined: Aug 2003
Posts: 43,190
Bend,OR USA
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That's good to know, which company?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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