Differences in 351W power year-year?
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Differences in 351W power year-year?
Im starting to plan an engine swap/build for when im finished with my suspension and body projects.
On that note, one of the options i am toying with is stroking a 351W out to 393 cubes, coupled to a ZF tranny.
First question, what is the stock Hp/Tq ratings on the 351w?
Second, did those change year to year and if so why?
How would the longer stroke affect the optimal power band of the engine?
On that note, one of the options i am toying with is stroking a 351W out to 393 cubes, coupled to a ZF tranny.
First question, what is the stock Hp/Tq ratings on the 351w?
Second, did those change year to year and if so why?
How would the longer stroke affect the optimal power band of the engine?
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
The 351W 4 bbl motor of 1969 was rated at 290 hp but this one had 10 to 1 compression. The pickup application ratings didn't change much, not even after the switch to the better roller cam, I don't think Ford was too concerned about accuracy in the ratings for trucks. Stroking it will move the peak power down in the rpm range. if nothing else is changed. Stroking along with heads, cam and intake can move the power up in the band, just depends on what parts are chosen.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
The EFI motors use pretty much the same longblock as the mid 80's carbed motors so power output is not surprisingly about the same. None of the stock heads or intakes are any good for a stroker motor, they don't flow enough for a 351 so more inches will just choke it even more. There is no major difference in block strength in any of the late model motors, all are pretty stout and the block will support into the 600hp range with an appropriate rotating assembly. The '69 mexican blocks are sought after because they have more material in the crank journals and will support more HP as a result.
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