Topic: whats the diffrence between a 351w and 351c?

[racingjz]

i know the 351w is a small block and that it?

[Soaring]

The 351C is also a small block.  It's the internal parts that make the difference between a W and a C.

[racingjz]

ow whats better for power making

[Soaring]

A lot of guys swear by the Clevo, but for availability of upgrade parts the W is far better.

[66GTKFB]

I remember this topic discussed some time ago (I don't remember where) and the general consus was that part availability was about the same, horsepower output was about the same, availability of blocks was about the same, both can be bored and stroked to 427CID but the 351C was about 50 pounds heavier and not seen as a "small block". On that basis, it has been labeled as a boat anchor. I grew up with 289CID and 351W engines and prefer them. I've only had one Ford with a 351C (73 Torino used as a tow car) and only had one problem in the 6 years I owned it, an overheat on a real long hill (Northbound US 101 outside of San Luis Obispo). 
Jim

[Soaring]

The short block / long block answer, not to be confused with small and large block engines.   A short block is an engine without heads or accessory components (water pump, oil pump, etc.) and a long block is a complete engine, ready to drop in. The terms are used for overhauled engines. If you need a ring job or have a messed up botton end, you buy a short block. If you need a complete engine, you go long block. Virtually any engine is available either way from various rebuilders.

Now, the Windsor was  considered a small block.  The family included the 221, 255, 260, 289, 289HP 351W and Boss 302 engines and was in production from 1964 - 1995

The Cleveland was considered a bigger block from the 335 family (aka, big small block). The engine family included the 351C, 400, 351M and Boss 351 and was in production from 1970 - 1982.

Identification of the 351W & 351C is easy. The 'W' has 5 bolt valve covers and the radiator upper hose connects to the intake manifold. The 'C' has 8 bolt valve covers and the upper radiator hose does not connect to the intake manifold.
The biggest difference in the factory W and the factory C are the heads.  The C has far superior heads, so a lot of guys try to find Cleveland heads to put on their 289's and 302's.  The Cleveland also has the capability of using 4 bolt mains. 

[racingjz]

thanks that helped alot

[Soaring]

The bottom line is that you can find upgrade aftermarket  or junk yard parts for the Windsor easier because that engine was produced several more years than the Cleveland although the Cleveland had a superior head.  You can buy an aftermarket new head (AFR) that is even better than the Cleveland though, so if you are wanting to rebuild an engine, go with the Windsor.   

[racingjz]

k thanks and [afr] make good heads i want to make a 393ci and will that fit my c 4 trans thats in it?

[Soaring]

If it's a 6 bolt, then yes.  An 8 bolt is a C

[66GTKFB]

With your large engine displacement as a goal, plan on a major overhaul and upgrade to your C-4 transmission, as well as beefing up the 8 inch rear axle if you can't find a 9 inch.
Jim

[Soaring]

A beefed up C4 and a beefed up 8" rear will give you  good performance up to about 500 HP.  After that, you are going to have to upgrade the tranny and rear to racing standards. 

[racingjz]

9inches are every were at my house the fig 8 car use them like what should i do to the trans?

[66GTKFB]

For a start, get a Summit Racing catalog and see what's available. Offhand, valve bodies, gears, servos, etc. After you add up the total in parts, see if one of their beefed up C-4s might be a better way to go.
Jim

[Soaring]

There are some other tranny companies that offer the beefed up C4 as well.  Do some research before you jump.  Here is a Mustang Monthly article you need to read.
http://www.mustangmonthly.com/projectbuild/mump_0203_c4_performance_transmission_buildup/index.html

[racingjz]

b and m makes a over hual kit to there specs pa trans has upgraded gears servo and vbodys there the most expensive depending on a trans brake this will cost about a 1000 to 1500 ruff est  A pa trans from summit is like 2200 with trans brake

[Soaring]

As the old saying goes, "you get what you pay for.  " But in this case, I think I would bypass Summitt. 

[rmodel65]

a cleveland will rev quicker than a W because of the main journal size the W was always the truck engine and the C was the horsepower maker

the C was king of the hill because even the 2v head outflow a lot of the aftermarket W head with a little porting and the 4v heads for a C are very large and flow real bigs numbers stock

you can find as many C parts as W's if you know where to look like www.ausfordparts.com they have a full line of Alum heads for C some are about 700hp ou of the box

[66GTKFB]

A 351W is a raised head casting derived from a 302, which was a development of the 289, which evolved from the 260, which came from the 221. And don't give me and crap about a 351C reving faster than a 351W. It's a boat anchor compared to a 289HP or a Boss 302.
Jim

[jethat]

The best one is the one thats in MY car! I'm a Cleveland guy..