mustangman33
Well-known member
i am about to build my 200. i was thinking i might be better of just getting a 250 and building that. i wandering what would be the pros and cons of building a 250 instead of a 200 and vise versa.
engine block
- Thread starter mustangman33
- Start date
early ford fan
Well-known member
the 250 requires a different bellhousing,different mounts,different oilpan,and is two inches taller.of course it may gain you fifty horsepower and it bolts to modern v8 transmissions like the aod....
We need to know what you want to put it in.
The 250 gives more cubes and more low end torque but does not rev as high or as quickly as a 170 or 200.
The log head has problems providing enough air for a performance 200, a 250 is choked even more. The only real answer is the Aussie 250-2v head, Classic Inlines aluminum head or a very highly modified cast iron log with the log milled off.
As said above the 250 also shares the small block Ford V8 bellhousing flange so finding a transmission that will bolt up is fairly easy. May have to mix and match and modify parts for zero balance or use 300 I6 parts to get clutch and torque converters matched up.
The 250 will work in early Mustangs and Falcons but depending on the vehicle you may need to do some changes.
The 250 is taller so there are some hood clearance issues. The block is wider so you may have to use Maverick motor mounts in some instances and slot the bolt holes so the engine sits a little lower.
On some early Falcons I think you have to flip the center link to get clearance.
Length is the same, excluding water pump.
There are no rear sump pans or pickups so you would have to fabricate one. To best of my knowledge only the later Fox body Mustang's, Capri's, Fairmonts, and Zephyr's use the rear sump pans.
There have been a few cases where guys have welded the bottom of a rear sump 200 pan onto a stock 250 upper pan that had the bottom cut off.
The 250 gives more cubes and more low end torque but does not rev as high or as quickly as a 170 or 200.
The log head has problems providing enough air for a performance 200, a 250 is choked even more. The only real answer is the Aussie 250-2v head, Classic Inlines aluminum head or a very highly modified cast iron log with the log milled off.
As said above the 250 also shares the small block Ford V8 bellhousing flange so finding a transmission that will bolt up is fairly easy. May have to mix and match and modify parts for zero balance or use 300 I6 parts to get clutch and torque converters matched up.
The 250 will work in early Mustangs and Falcons but depending on the vehicle you may need to do some changes.
The 250 is taller so there are some hood clearance issues. The block is wider so you may have to use Maverick motor mounts in some instances and slot the bolt holes so the engine sits a little lower.
On some early Falcons I think you have to flip the center link to get clearance.
Length is the same, excluding water pump.
There are no rear sump pans or pickups so you would have to fabricate one. To best of my knowledge only the later Fox body Mustang's, Capri's, Fairmonts, and Zephyr's use the rear sump pans.
There have been a few cases where guys have welded the bottom of a rear sump 200 pan onto a stock 250 upper pan that had the bottom cut off.
mustangman33
Well-known member
i would be putting pretty much everything that classic inlines sells on my 200 and i think ill stick with that even though the lower torque with the 250 sounds good, which is what i wanted to achieve with my build since it will be mostly a street diven car where the top speed limit is 60 mph.and the 250 doesnt seem to have as many parts available for it.
If your starting from scractch a 250 is a better choice , the 50 cubes CAN'T be beat , does 10s is proof , at least on this site , I am putting my 65 coupe with a 250 to the test this spring , and I think the biggest selling point is the Transmission options ( if you already have a 200 ) I and its say a round body Falcon there are definet benifits to a 200 , ( 66 and up block especially ) as the clearences around the engine make some things tougher. The old addage that there is no replacement for displacement still applies ( normally asperated of course )
mustangman33
Well-known member
i just bought a t-5 can i use that on the t-5?
mustangman33":1bhfc5sz said:
Use a V8 T5, It has a higher torque rating.
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