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Old 07-06-2016, 08:11 PM   #1
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Heads question

Alright I have a quick question.
What benefits do the 4v heads off of an 01 cobra have over the stock 2v ones ?


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Old 07-06-2016, 08:54 PM   #2
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Typically, the more valves that you have in each cylinder, the more air that the engine will flow, thus increasing the power of the engine.
For instance, the 4V engine in the Cobra has approximately 60 more horsepower than the 2V engine in the GT. This is due to the better flowing heads of the 4V allowing the Cobra engine to spin at higher RPM'S than the 2V.
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Old 07-06-2016, 08:57 PM   #3
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Quote:
Originally Posted by straybullitt View Post
Typically, the more valves that you have in each cylinder, the more air that the engine will flow, thus increasing the power of the engine.

For instance, the 4V engine in the Cobra has approximately 60 more horsepower than the 2V engine in the GT. This is due to the better flowing heads of the 4V allowing the Cobra engine to spin at higher RPM'S than the 2V.

So what kinda gains should I be looking at if I swap to those heads ?


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Old 07-06-2016, 09:14 PM   #4
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A Cobra/Mach 1 4V swap should net around 60 hp over a 2V.

Scotty seems to have come across an adapter that allows swapping a complete, inexpensive, Lincoln 4V engine into a Mustang. There is some info about that swap in his Steeda build thread, in this forum.
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Old 07-06-2016, 09:40 PM   #5
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I've never messed with heads at all.
Is it gonna be a straight forward install if I decide to do it ?


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Old 07-06-2016, 09:51 PM   #6
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I suppose that it is as straight forward as working on any overhead cam engine. I've never done the swap but I don't recall reading about anything that is too difficult about it.
If you Google "4V swap" there is a lot of information available about how to do it.
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Old 07-07-2016, 05:45 AM   #7
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It's going to be more than just the heads

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Old 07-07-2016, 05:51 AM   #8
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I'm sure if all you had to do was swap the heads, we'd all be running 4v by now.

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Old 07-07-2016, 07:06 AM   #9
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Look up 2V to 4V swap on google. Its a 95% drop in but its not as simple as just swapping heads. You also need to be able to properly degree cams or take the engine to a place that can do it for you.
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