2006 Ford Mustang
Ken Miele
September 18, 2014

Cam Timing

I have a '93 GT 5.0 AOD car. I just installed a TCI Street Fighter kit in the trans. I have a 2,800-stall converter 4.10 gear. I have a set of GT-40p heads and Explorer upper and lower and plan on installing an E303 cam. Should I install the cam straight up? I have read I should advance it 6 degrees to keep bottom-end torque. Also, should I gasket-match my heads and lower intake or just bolt them on? I have nitrous but the car will mostly be run on motor.

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I would suggest you install the cam straight up. Advancing a cam will usually give you more low-end power, but it may hurt the top-end and cancel any gains you might get on the low-end. Most cam manufacturers have spent many hours engineering a cam to be installed straight up unless otherwise stated on the cam card. There are other issues you can run into, such as piston-to-valve clearance. Advancing the cam timing will move the intake valve closer to the piston, which in most cases is a nonissue with a low-lift cam. As a rule of thumb, I never install a camshaft without checking piston-to-valve clearance. And as for gasket-matching the heads and intake, there's no need for a street application like yours because the power gain really is minimal.


I have an '06 GT (Roush Stage 1) and decided it needed some power, so I ordered a set of BBK ceramic-coated, long-tube headers, with hi-flo cats and an X-pipe running through Roush resonators. After reading your Dec. '13 issue of Car FX's Blue Angels, I ordered a Paxton Novi 2200SL. My problem is that no one here in Oklahoma wants to dyno-tune my car without me buying a SCT tuner and scrapping the DiabloSport Predator tuner that came with my Paxton kit. Do you think the car will run lean with the exhaust system that's on it? And what is the most rear-wheel horsepower that I can expect and still be dependable? The car has a five-speed and 3.31 gears. I'd really like to see around 425 rwhp.

Teresa Burdick
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While the exhaust upgrade will definitely improve your Stang's performance, adding those long-tube headers probably will cause the engine's air/fuel mixture to become lean. Since you wish to continue using DiabloSport's PCM calibrations, your best bet would be to contact DiabloSport and request information about their authorized dealers and tuners in your area, or arrange to have DiabloSport's in-house technicians create a custom calibration that supports your upgrades. With the right tune, and using the High Output Paxton Novi 2200, your Roush should have no trouble making 425-plus rear-wheel horsepower.

Engine Swap

Hello. I have an 1987 5.0L engine that I would like to put into a '94 or '95 Mustang coupe. Will the rearend gears have to be changed? If so, what are the best gears to run for daily and highway driving? Will the K-member have to be changed for the engine to fit and work properly? Also, for accessories like the cruise control and the A/C, will there be a problem getting them to work? When it comes to the gas mileage and performance, mainly the gas mileage, is there much of a difference when it comes to a carburetor and fuel injection?

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The stock gears can be retained. The swap is fairly simple. The '87 5.0 will bolt right in, without requiring a different K-member. However, there are some parts you will need for this swap. Mass Air Conversion Kit: M-9000-A51 (manual trans) or M-9000-B50 (auto trans). Main electrical harness: M-12071-C302 Sensor and relay package: M-12701-D302. Fan Speed Control Module: F4ZF-128577-AA. Using a donor car will make this swap a lot easier, but it's not a must. I don't recommend a carburetor; fuel injection is more efficient, giving you better mileage and performance.

Carb Woes

I have an '85 Mustang GT 5.0/five-speed. The car is in excellent condition but needs some upgrades. I love the car except for the carburetor, which is causing me nothing but grief. I have had lots of advice, but I can't decide whether I should send the stock Holley to Pony Carbs, or swap out the intake and carb for aftermarket fuel injection. The shocks are tired and need replacing, I'm wondering if there are some simple suspension upgrades. I can do most of the work myself. Any tips on these areas will be greatly appreciated.

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Pony Carbs is a very reputable company and you will not go wrong using them. I would rather see you go the fuel-injected route for better drivability and performance, but going to EFI is more expensive than sticking with a carb. The best suspension upgrades are of course shocks. Swapping out your rubber suspension bushings for polyurethane ones will improve your handling dramatically without breaking the bank. Energy Suspension carries complete kits for the Fox.