Thread: 94 F150 Tow Rig
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Old 04-05-2019, 03:38 PM   #19 (permalink)
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Jeep - '97 Jeep Cherokee Sport
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Originally Posted by Shaneajanderson View Post
That's why I was thinking headers and a cat delete. The previous owner put a glasspack to dual exhaust setup, but I don't really think it's the best option for low end, so I do the front half I might redo the whole works to 2 1/4 to a single side exit, which I prefer anyway.

Any thoughts one how much to bore the throttle body? This is the one that has two throttle body inlets stacked on top of each other. I will look into injectors.

My hesitation on a cam is mainly that I don't have a garage to work in, and I have nosy neighbors who throw a fit anytime I do an oil change, let alone if they see me pulling valve covers and the intake out of my pickup. I'm going to do some serious checking over though, and If I have the slightest suspicion that an intake gasket might be needed, I will probably just go ahead and do the cam at that point as there isn't much left to do then.

Not sure if there's performance chips available, but my intake is cast aluminum.
Cat delete is illegal. I wouldn't do it. They also play an important role in reducing vehicle emissions. There are high flow cats if you are interested.

Easiest way to get a bigger throttle body is to buy an aftermarket one that has already been bored out. If that isn't an option, you can take it to a machine shop. Many throttle bodies are tapered at the bottom. A conservative bore would be to remove the taper. Or you could reasonably go a little bit bigger. For example, the stock throttle body on my jeep had a 60 mm opening and was tapered to 55 mm at the bottom. I bought a bored out throttle body from a machinist for my vehicle that was 62 mm all the way through. It gave me a huge increase in throttle response a little bit more horsepower and torque. I think it improved my mpg as well, but I didn't test for that scientifically. If you want you could email the guy I bought the throttle body from and ask him to bore out yours. The bonus is that he makes throttle plates. You would have to make your own if you did it by yourself. It cost me around $130 or so for the throttle body.
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