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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 10-27-2010   #1 (permalink)
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Default How to make my 302 faster

My rebuilt 302 is decently quick in my '68, but I was hoping for some tips on how to make it even faster.
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Unread 10-27-2010   #2 (permalink)
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You will need to give some info on what it has now, before anyone can give you ideas about what else to do.
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Unread 10-27-2010   #3 (permalink)
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Other than the 650 Edelbrock carburetor nothing's been done for performance
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Unread 10-27-2010   #4 (permalink)
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a mild cam and headers would wake up that motor pretty good
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Unread 10-27-2010   #5 (permalink)
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Start by adding compression. You can do this by having the heads milled but you won't get a big jump in compression doing that but you can go from the 8.5 to 9:1. If you have stock rear end gears then you will need a cam that gets a lot of torque down low - similar to the Edelbrock "Performer" cam specs.
If you are running a C4 transmission then adding a TransGo Reprogramming kit (47-2 for 67-69 or 40-2 for 70 and later).
That combination should provide you with a smile when you drive it.
Some additional money can be spent on getting the distributor advance curve taylored to your engine and driving style and some 3.55 gears installed in the rear end.
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Unread 10-27-2010   #6 (permalink)
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Heads are the biggest HP maker you can throw on any 302. Even with a stock cam intake and that 650 carb it will add more power than almost any other individual mod, its just the price tag that holds most people back.
You could easily add 40-50hp with a decent set of heads alone, and without investing in almost anything else. Heads are great because they only flow what you supply them with, so if you stay mild on the intake and exhaust then the heads will only flow the maximum that both systems can create, and it sets the stage for future mods that will only complement and go from mild to wild in no time. With a stock cam and mild carb and just headers there should be no drawbacks whatsoever, vacum should remain plentiful and you should not lose any compression or sacrafice low or high end power if the heads you choose are conservative size on chambers and valve sizes.
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Unread 10-27-2010   #7 (permalink)
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Now are you talking about new 302 heads or like 351 Cleveland heads?
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Unread 10-28-2010   #8 (permalink)
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Adding heads will open the engine up for better breathing if you are going to turn the engine fast enough to flow the that amount. Putting AFR165 heads on an otherwise stock motor will not add much power to the engine. If you add a new manifold that matches the flow, a carb that matches and headers and an exhaust then you will get the added hp.
The Internalk Combustion engine is a group of sub-systems that have to work together to pump air and heat efficiently to make power. No one part is a magic bullet to more power.
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Unread 10-28-2010   #9 (permalink)
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Heads, intake manifold, headers, retard the timing about 10 degrees, the list can go on and on and on and on and on! All depends on how deep your wallet is.
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Unread 10-28-2010   #10 (permalink)
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Remember there are (three parts) to your drive train which a lot of people forget they build the motor and expect the world it just doesn't happen. don't get me wrong you will get more power but you will get a lot more power by building all three together (a combination). If money is a problem then I would and do start of with the rear diff gear ratio.Its the cheapest way to start off, and you will get more torque for your money. As they say bang for your buck. :hihi: Hey but most people like bling bling on there motor and that's all that matters to them.
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Unread 10-31-2010   #11 (permalink)
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Quote:
Originally Posted by sweethotrods View Post
Remember there are (three parts) to your drive train which a lot of people forget they build the motor and expect the world it just doesn't happen. don't get me wrong you will get more power but you will get a lot more power by building all three together (a combination). If money is a problem then I would and do start of with the rear diff gear ratio.Its the cheapest way to start off, and you will get more torque for your money. As they say bang for your buck. :hihi: Hey but most people like bling bling on there motor and that's all that matters to them.
excellent point!
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