hp difference in 351W's
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hp difference in 351W's
is there a hp difference between the 351W in my 86 f150 and the 351 in my 94 f150. my 86 seems to have more power, the 86 is a 2wd 4 barrel and the 94 is a 4x4 fuel injection, I know theres a weight difference, the 86 says HO on the air cleaner. if that means anything. just wondering if there was a big hp difference? 
Post Fiend
Joined: Nov 2001
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From: Topsfield, MA
There isn't a big hp difference, but the 94 is rated at 210ish, the 86 is probably 170-180ish (not sure). The biggest difference is probably gear ratios being different, and the weight difference. Also, there are big varients in power output based on the condition of the engine and vehicle...
The 86 is probably a little more toquey than the 94.
The 86 is probably a little more toquey than the 94.
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Hi Justin, the 86 has about 78,000 miles with an axle code that says(14) and the 94 has about 100,000 miles with axle code (H9), but that 86 seems to run alot stronger than the 94 for some reason, my 94 seems to always be laboring, and that 86 seems to run alot free'r if that makes any sense
Post Fiend
Joined: Nov 2001
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From: Topsfield, MA
Maybe there is something negatively affecting power output on the 94....hard to say...
Assuming they're both working like they should, and are in the condition they should be in (assuming they both have good compression, etc etc), the only thing i can think of from a design difference is just the way the torque is...the 86 will probably feel slightly more like a diesel, lots of torque down low. The 94 is probably a little more towards the horsepower aspect with lighter torque down low...but it shouldn't be an earth shattering difference.
I've never driven an carbed version, I'm just going by specs and from previous knowledge.
Assuming they're both working like they should, and are in the condition they should be in (assuming they both have good compression, etc etc), the only thing i can think of from a design difference is just the way the torque is...the 86 will probably feel slightly more like a diesel, lots of torque down low. The 94 is probably a little more towards the horsepower aspect with lighter torque down low...but it shouldn't be an earth shattering difference.
I've never driven an carbed version, I'm just going by specs and from previous knowledge.
Post Fiend
Joined: Nov 2001
Posts: 14,947
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From: Topsfield, MA
Well, to get higher horsepower, you've got to either have a higher reving engine, and/or a higher torque output. So for the newer engine with 210hp and the other with 165, to be able to make that gap, it either has a higher redline, or more torque, or both. You can even have a loss in RPM but a bigger increase in torque and still come out with more horsepower. It's just a formula, horsepower is not a physical measurement of a force. Torque is, it's the actual amount of twisting force. There is just a formula that you can calculate the horsepower if you know the RPM and the torque.
