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Author
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Topic: 351C blocks
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GTS
Journeyman Posts: 14
From: Ont
Registered: Oct 2006
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posted 10-18-2006 12:10 AM
  
What should be done to make these blocks survive with there thin cylinder walls?
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JSracing
Journeyman Posts: 69
From: Batesville, MS. U.S.
Registered: Jul 2006
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posted 10-18-2006 12:28 AM
Welcome to M & M. I'll let some of the 351C gurus answer your first tech post. however, I would encourage you to come over to the dark side though...  ------------------
JS
Life`s journey is not to arrive at the grave safely in a well-perserved body, but rather to skid in sideways, totally worn out, shouting "holysh....t what a ride!!!"
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GTS
Journeyman Posts: 14
From: Ont
Registered: Oct 2006
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posted 10-18-2006 08:41 AM
Thanks It seems like I'm always on the dark side. I'm helping out a freind that is ready to give up on these(351C) engines. Guy's are racing them, there must be a way to make these blocks work.
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Greg Pettit
Gearhead Posts: 154
From: Denton, TX
Registered: Nov 2001
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posted 10-18-2006 10:22 AM
Upgrade the stroke to 4.5", and increase the bore to 4.39".That would be a start.....lol..... Greg ------------------
'71 Torino GT 545 stroker, Ported Edelbrock CJ heads, 11.8:1 compression, Victor intake with 850 DP, TCI streetfighter converter, 3.89 detroit locker, full interior with A/C [IMG]http://i80.photobucket.com/albums/j168/point92mach/FM_avatar.jpg[/IMG]
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Hans olsson
Gearhead Posts: 924
From: Sweden
Registered: Apr 2000
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posted 10-18-2006 11:23 AM
A good start is to fill the block(leave one to two inches of water at the top).
Remove all casting flash and sharp edges inside and outside on the block.
Use stock stroke and the lightest possible piston and pins and keep the overbore to a minimum.
Before you decide to use a block remove the freeze plugs and see if there is much rust on the outside of the cylinder walls.
If it is you might want to look for a better block to work on.
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- VIN 1F05M139343
- 71 Mach 1 Ram-Air
- 351C 4V 285 HP
- E-F-G/SA
- Stockers are way cool!
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kid vishus
Gearhead Posts: 7151
From: middle of NC
Registered: Oct 2000
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posted 10-18-2006 07:10 PM
I agree with Hans. Depending on how much power he is making, he could get away with a half fill too. Once I started filling the block to the water pump outlet, I stopped having issues with the block. The only time after that the block broke, was when it was preceeded by a multi-piece crankshaft.  Welcome to M&M.  ------------------
Rob Hetzler
M&M member #773
'69 mustang, 351C, best 9.97 @ 133 mph 1/4, 6.18 @ 110.4 1/8 (til it blew up), now 402" clevor powered, 6.144 @ 112 mph
'93 F150 Lightning 15.33 @ 87 mph, completely stock with 206k miles
'04 F350 dually quad cab powerstroke (tow truck for the racecars)
'60 Falcon wagon project car
'99 Pro Et track champion
'00 Mod ET R-up (with new car) My Photo Page
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JSracing
Journeyman Posts: 69
From: Batesville, MS. U.S.
Registered: Jul 2006
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posted 10-18-2006 11:06 PM
quote:
Originally posted by Greg Pettit:
Upgrade the stroke to 4.5", and increase the bore to 4.39".That would be a start.....lol..... Greg
that's what I meant by the Dark side. LOL but yeah man hans nailed it. I used to run a "C" motor and we always filled it. since it was on alky it didn't need the extra cooling anyway. ------------------
JS
Life`s journey is not to arrive at the grave safely in a well-perserved body, but rather to skid in sideways, totally worn out, shouting "holysh....t what a ride!!!"
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GTS
Journeyman Posts: 14
From: Ont
Registered: Oct 2006
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posted 10-18-2006 11:13 PM
I would like to talk him into filling the block..........he has so many parts already.What about a 408 with a 6.2 rod. Does this configuration work in these blocks.
If you fill to the W/P hole how far down from the deck is the fill?
[This message has been edited by GTS (edited 10-18-2006).]
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clevelandstyle
Gearhead Posts: 1523
From: central Indiana
Registered: Jul 2001
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posted 10-19-2006 12:00 PM
The most practical rod length for a 408C is a 6" rod. If you tried to squeeze a 6.2" rod in it there wouldn't be any piston left. I'm running a 6" rod with the block filled within 1.5" of the deck.------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 408C 4V, 10.50 127 MPH
Prowler Purple '87 T'bird Turbo Coupe
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GTS
Journeyman Posts: 14
From: Ont
Registered: Oct 2006
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posted 10-19-2006 12:25 PM
Is that 1.5 where you end up filling to the bottom of the W/P holes? What kind of power and gas?
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clevelandstyle
Gearhead Posts: 1523
From: central Indiana
Registered: Jul 2001
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posted 10-19-2006 07:09 PM
I filled mine higher than the water pumpholes and tapered the fill at the entry.I don't know the power . Never been on the dyno. It's a 3200lb. car and has run 10.50 @ 127mph in the 1/4 on gas. ------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 408C 4V, 10.50 127 MPH
Prowler Purple '87 T'bird Turbo Coupe
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GTS
Journeyman Posts: 14
From: Ont
Registered: Oct 2006
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posted 10-19-2006 10:39 PM
quote:
Originally posted by clevelandstyle:
I filled mine higher than the water pumpholes and tapered the fill at the entry.
Interesting!!
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kid vishus
Gearhead Posts: 7151
From: middle of NC
Registered: Oct 2000
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posted 10-19-2006 11:09 PM
quote:
Originally posted by clevelandstyle:
I filled mine higher than the water pumpholes and tapered the fill at the entry.
The last one I filled, I filled halfway up the water pump holes, and biased the fill towards the thrust side of the cylinders.
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70coupe
Gearhead Posts: 491
From: Toronto,Ontario,Canada
Registered: Aug 2000
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posted 10-20-2006 11:06 PM
Alright GTS, you're pushing my buttons!
You really want me to try this 351c "thing" one more time after losing 3 blocks? If we go this route (I trust your engine building capabilties) then it will be a 408 on pump gas.------------------
351c 4v clsd heads
60'1.502
1/8 7.04@96
1/4 11.15@119
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Mpcoluv
Gearhead Posts: 1413
From: Charlotte NC usa
Registered: Apr 2001
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posted 10-21-2006 09:17 AM
From what I can tell with my half filled block, there doesn't seem to be a real downside.
Granted I have a 8 quart oil pan, but I see no overheating issues or high oil temps so far.
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clevelandstyle
Gearhead Posts: 1523
From: central Indiana
Registered: Jul 2001
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posted 10-21-2006 10:21 AM
quote:
Originally posted by 70coupe:
If we go this route then it will be a 408 on pump gas.
Hey. That combo works.
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Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 408C 4V, 10.50 127 MPH
Prowler Purple '87 T'bird Turbo Coupe
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