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Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 02-28-2012   #1 (permalink)
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Default 6 cyl horsepower

Im trying to get some more horsepower out of my 67 6 cyl. I have heard that the pertronix ignition coil adds some but would i have to get the electronic ignition kit too? Any other horspower increase suggestions besides a V8?
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Unread 02-28-2012   #2 (permalink)
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No the only thing you would have to do with the pertronix is give it a keyed (only getting power in the "on" position) 12v source (the wire going to the coil is a ballast providing only 6 volts).

Check out Classic Inlines Performance Parts - Home They specialize in performance for the 6 cylinder fords.

I would recommend a port divider for the exhaust on cylinders 3 & 4 to smooth the exhaust out. A 2 barrel carburetor upgrade, a comp cam kit. These will all increase performance (without really breaking the bank). I've done the port divider and pertronix. I love em. This semester I'm looking at putting in a new cam with my new headgasket and I have a 2 barrel carburetor from a 1968 Mustang.

One thing to keep in mind. If you change your carburetor you need an entirely new distributor (unless you have a smog car). 1965-1967 had the idiotic "load-o-matic" distributor & spark control valve carburetor. http://classicinlines.com/Loadomatic.asp
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Unread 02-29-2012   #3 (permalink)
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Read the tech portion of the link to Classic Inlines from start to finish. It will show you everything you can do in steps from mild to wild with dyno results to back it up. Welcome to the world of the I6. Your wallet is your only limiting factor.
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Unread 02-29-2012   #4 (permalink)
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Another thing to consider. If you are planning on switching the carburetor and you already bought the electronic ignition for for single barrel. You will probably have to buy a new pertronix kit. A non SCV(spark control valve) carb needs a 68 or later distributor to run correctly. Pertronix sells an ignition kit for a 65-67 and one for a 68 and older. You will need the 68 and older one. Unless your car has emissions. Ask me how i figured this one out.. back to points i go..for now.. Bottom line: The 65-67 ignition kit doesnt fit a 68 distributor! so buy the 68 if youre going to switch to a non scv carb!
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Unread 02-29-2012   #5 (permalink)
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Sidox, my car was an emissions car. It still has the original distributor (non loadomatic). They make a pertronix kit for the emissions cars.
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Unread 02-29-2012   #6 (permalink)
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I have an additional question. I will be having my 1966 Mustang 200 I6 rebuilt and the cylinders bored out, new intake manifold, carb, headers, etc to increase horsepower. I will be doing this through my local classic car mechanic. My question is: when a V8 is placed in a I6 car, the suspension, etc has to switched out to handle the V8. When a I6 is modified, will the 6 cylinder body need those same parts upgraded or will the suspension, etc be sufficient?

Thank you

Allen
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Unread 03-01-2012   #7 (permalink)
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Quote:
Originally Posted by DrVett View Post
I have an additional question. I will be having my 1966 Mustang 200 I6 rebuilt and the cylinders bored out, new intake manifold, carb, headers, etc to increase horsepower. I will be doing this through my local classic car mechanic. My question is: when a V8 is placed in a I6 car, the suspension, etc has to switched out to handle the V8. When a I6 is modified, will the 6 cylinder body need those same parts upgraded or will the suspension, etc be sufficient?

Thank you

Allen
You will be fine.
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Unread 03-01-2012   #8 (permalink)
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How are you getting a new intake manifold? The factory cylinder head has the intake manifold cast as part of it.
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Unread 03-02-2012   #9 (permalink)
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Quote:
Originally Posted by 66Sprint200 View Post
How are you getting a new intake manifold? The factory cylinder head has the intake manifold cast as part of it.

I was just gunna ask the same exact thing
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Unread 03-02-2012   #10 (permalink)
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If he has done the reading I suggested, he should know by now what his options are.
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Unread 03-02-2012   #11 (permalink)
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[quote=66Sprint200;2943068]Sidox, my car was an emissions car. It still has the original distributor (non loadomatic). They make a pertronix kit for the emissions cars.

What exactly OS an emissions car?
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Unread 03-02-2012   #12 (permalink)
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I'll answer in part. California made cars never came with the SCV carb and Load-o-Matic distributor. The rest of the country didn't switch to the non SCV carb and distributor with both centrifical and vacuum advance until 1968.
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Unread 03-02-2012   #13 (permalink)
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Explorer, not just that, and not all california cars. Some cars built in California were destined to be sold in California. These cars were smog equipped. There was actually a belt run smog pump with tubes that ran into the cylinder head on the same side as the exhaust and intake manifolds.
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Unread 03-03-2012   #14 (permalink)
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Guess thats what is referred to as IMCO?
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Unread 03-15-2012   #15 (permalink)
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Has anyone found a good header with dual outlet that they like?
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