351M
02-08-2009, 10:05 PM
#5
1st Gear Member
Thread Starter
Join Date: Jun 2008
Location: Texas
Posts: 76
Well the first thing is to get the compression ratio up, port and mill the heads or by some aussie heads high compression pistons, high pressure oil pump, bored .030 and a 650 to 750 cfm carb and you have about a 400/500hp machine that will last.So does anyone have an answer to my question about the wieght
Last edited by TexasHotrod; 02-08-2009 at 10:08 PM.
02-09-2009, 08:11 AM
#6
3rd Gear Member
Join Date: Aug 2005
Location:
Posts: 577
The 351M/400 is a 335 series engine. It is part of the Cleveland engine family. It is heavier than a Cleveland but I am unsure how much. I believe it is much lighter than a 429/460 and still a little lighter than the FE seiries big blocks.
Many people mistanke the 351M/400 engine for a big block. It is s small block with a taller deck. It has engine mount pattern on the block unique to itself and uses the 429/460 bell housing pattern. The bore spacing is the same as a 289,302,302 BOSS, 351W and 351C.
The 351M/400 came with two different strokes. 3.5 inch for the 351M and 4.0 inch for the 400. They both share the same bock and connecting rods. So to convert a 351M into 400 inches is just a matter of pistons and 4 inch stroke crank.
The Ford Racing 9 index timing chain for a 351 Cleveland will work in the 351M/400. Use an oil pan for a Cleveland swap into a Fox Mustang on this block as well with a rear sump pick up. Use a High volume pump and an ARP heavy duty oil pump shaft for a Cleveland as well. Some people choose to run oil restrictors to restrict oil to the number 2 through number 5 cam bearing oil passages. These can be had for about 11 dollars at Summit racing and are made by Moroso also for a Cleveland.
With the heads, closed chamber Aussie 2V heads will help with compression. Though the open chamber 2V heads will make good power too. We did a pump gas/non power adder Torino street car with a C6 and mild torque convertor at roughly 3800 pounds with open chamber 2V heads 400 inch engine and it ran 12.40 in the 11/112 MPH range. Cheap build and lots of fun.
Engine mounts, tranny bell housing pattern, and headers will be your biggest issue. Also making sure it is 400 cubic inches as well.
It can be done to run well. But knowing how to do so is the bigger factor in keeping the cost down. Otherwise you will be better off building the Windsor style small block.
Joe
Many people mistanke the 351M/400 engine for a big block. It is s small block with a taller deck. It has engine mount pattern on the block unique to itself and uses the 429/460 bell housing pattern. The bore spacing is the same as a 289,302,302 BOSS, 351W and 351C.
The 351M/400 came with two different strokes. 3.5 inch for the 351M and 4.0 inch for the 400. They both share the same bock and connecting rods. So to convert a 351M into 400 inches is just a matter of pistons and 4 inch stroke crank.
The Ford Racing 9 index timing chain for a 351 Cleveland will work in the 351M/400. Use an oil pan for a Cleveland swap into a Fox Mustang on this block as well with a rear sump pick up. Use a High volume pump and an ARP heavy duty oil pump shaft for a Cleveland as well. Some people choose to run oil restrictors to restrict oil to the number 2 through number 5 cam bearing oil passages. These can be had for about 11 dollars at Summit racing and are made by Moroso also for a Cleveland.
With the heads, closed chamber Aussie 2V heads will help with compression. Though the open chamber 2V heads will make good power too. We did a pump gas/non power adder Torino street car with a C6 and mild torque convertor at roughly 3800 pounds with open chamber 2V heads 400 inch engine and it ran 12.40 in the 11/112 MPH range. Cheap build and lots of fun.
Engine mounts, tranny bell housing pattern, and headers will be your biggest issue. Also making sure it is 400 cubic inches as well.
It can be done to run well. But knowing how to do so is the bigger factor in keeping the cost down. Otherwise you will be better off building the Windsor style small block.
Joe
02-09-2009, 07:49 PM
#7
1st Gear Member
Thread Starter
Join Date: Jun 2008
Location: Texas
Posts: 76
well I know building the 302 is probably easier my problem is no matter how fast it is it will never be fast enough and on a factory 302 if add to much power ill split the block, which I could buy a ford racing 302 but y do that when I have this 351M that I know has potentiel, I never said it was going to be an easy build but my main concern is putting it in the little mustang body.
02-11-2009, 09:53 PM
#8
2nd Gear Member
Join Date: Mar 2007
Location: ohio
Posts: 424
well....
if you are on a very limited budget and were doing it on the cheap i would say go for it.. BUT if you are willing to spend some cash anyway as it sounds you are i ask why not use a 351w???? the 351m is outmatched in every catagory by a 351w... lighter, more popular bell pattern, better heads, better intakes, etc etc...
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