What did they do ? - Muscular Mustangs
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post #1 of 5 Old 04-09-2006, 09:46 AM Thread Starter
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What did they do ?

I just bought a 72 Mustang with a 302 engine in it. I was looking up the Hp. on the engine and was amazed to find out that in 72 the 302 only has 140 hp, but in 71 it has 210 hp. I was wondering if anyone could tell me what they did to loose 70 hp.
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post #2 of 5 Old 04-09-2006, 02:58 PM
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To be honest, i know very little about the classic Mustangs, but i'd assume it has to do with emissions.

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post #3 of 5 Old 04-10-2006, 07:54 PM
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yea, its alot of emissions...look at a vacuum diagram of a 69 302, and your 72...i think my 70 only has one vac line for the ignition advance, while the 71+ has about a hundred, and maybe a smog pump, different smog heads, and i think a less agressive cam and carb steup...
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post #4 of 5 Old 11-16-2006, 08:14 AM
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Ford did seem to make a mess of things in 72 (as noted in the database section) i had a 69 351w 2v in my 72 mach 1 and the performance was pretty good, i was then offered a 72 351c 4v cobra jet that i fitted and was so dissapointed it has taken a lot of polishing and porting, new flat top pistons, valves, a good cam, torker intake, heders and a 750 carb to bring it up to a performance level i am happy with, it is now much better than the 351w, but with the same work done to the windsor would it have out performed any early 70's engine? I only wish i had tried it.
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post #5 of 5 Old 06-13-2009, 07:37 PM
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'71 & '72 HP specs

Ford did 2 things for the 1972 model yr as far as engine specs are concerned. Compression ratios were lowered on all engines (some drastically). GM had done this already the previous yr (1971). Blame that on emissions. To top that off, in 1972 all manufacturers were required to state HP & Torque values using the SAE Net calculation (instead of the previous Gross calculation). It makes it very difficult to compare engines between the 2 yrs. Suffice to say the F code (302) suffered more than most w/ much lower compression and probably lost 30HP alone due to the SAE standard. Clear as mud???
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