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Discussion Starter · #1 ·
My son-in-law has a 92 Mustang GT with a 5.0 engine and a T5 trans, and he just started working to build it up for some extra power and faster 1/4 mile times.

It is mostly stock, but he recently added a BBK cold air kit and a B&M ripper shifter. He has a ZEX nitrous kit installed but has never used it.

Any advice on what changes to make and in what order? There are a lot of opinions we hear but not from anyone who has actually done them on this kind of car.

We'd appreciate any advice. Thanks!
 

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Just like any engine build, decide what kind of power you want to make, and then build the engine to do it. Without a plan, a lot of money can be wasted.

If you're thinking 300 HP, consider a cam and intake. If you're thinking 400HP, heads, a cam, intake, reprogrammed computer, injectors, fuel pump, and strengthened bottom end.
 

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Discussion Starter · #3 ·
Thanks for the reply.

On a limited budget, is there a best order to add various upgrades? An engine rebuild may have to wait for a year or two. Are there other add-ons which would be worth the money?
 

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youve started on the intake side with the BBK. Could either keep changin out intake side parts or start on exhaust, headers & mufflers. Relatively easy to install and will net some decent gains.
 

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Discussion Starter · #5 ·
I forgot to mention that he did install some Hooker Aerochamber mufflers. How good id the rest of the stock exhaust system? It looks like it has an H-pipe and factory headers.
 

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Its probably a small exhaust system, and crush bent. A mandrel bent 2.5 inch system with an x or h-pipe (though x has been proven to net a little more power across the whole band) and free-flowing mufflers will handle up to 450HP with no prob.

Long tube headers, or more free flowing ones will also make a big difference.

Like pass1over said, you've helped air get into the engine, now help it get out. Exhaust system can net you not only power, but also increased fuel economy.
 

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Discussion Starter · #7 ·
When would be the right time to go after a new set of gears? He currently has 3.08's. And which ratio would be the best?
 

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You could probably use a set of gears, even with the stock cam, but if you go to a more aggressive cam, then you should really consider buying a set. Depending on how much low end torque you are making, you should buy a set of gears to take advantage of that. If you end up building a high-RPM screamer, you'll want some nice high gears, 4.30's or 4.11's

Since you have a T5 with an overdrive, you could easily go with 3.73's or similar and still maintain decent highway manners and mileage. A set of 3.73's will make a difference even on a stock engine - but too much more than that and you're going to see minimal gains. A set of gears will make the car feel much faster, whether or not you gain ET.

Gears now would still be beneficial, but if you plan on putting a much more radical cam in the future, you may want to hold off until you know what you're going to get. If you know you're not going to drive it on the highway, you could slap a set of 4.11's in it, but I dont think you'll see that much gain over 3.73's with a stockish engine. Those cars are nice and light, so building an engine that can rev with some pretty high ratio gears works well.
 
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