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I agree. the afrs are already cnc ported. you may be able to improve on them a little but the TW could be ported and they would outperform the afrs. out of the box, the afrs outflow the TWS, but not by a whole lot. I don't think you'd notice much difference. do some research and you'll...

A lot of people would say NOS would be the cheapest horsepower. As far as bolt ons, I'd probably go with intake. The TB, MAF would give you a few more hp, but probably not a huge "seat of the pants" difference. The intake should free up a few more. Unless you throw on a s/c ($$$), you're...

I was just looking at your web page. How is your mustang coming along?

tps AND eec were shot? is that common. It's always hard to diagnose problems when more than one thing is the culprit. well, I'm happy for you. it can be frustrating at times. :nice:

I'm not going to be much help b/c I just realized his is ported. I know stock for stock, the performer flows much better. I would think the performer still has the edge, but I really don't know for sure.

go with the stock range. The absolute worse thing that will happen is that it will run rough and you'll have to regap them. All of 15 minutes work. You don't close the gap on N/A motors, you close it on supercharged motors. .040 seems really narrow to me. Mine are at .035 b/c I have a...

another vote to go ahead and do it. You'll only have to spring for a few more gaskets (maybe) and a little silicone for the lower intake. I don't think it would kill your low rpm range, and you'd gain some higher up.

if it's backfiring through the exhaust, that's a sign of running rich. you may be losing spark, so the TFI may be on the right track.

There is a formula for calculating fuel injector size, but I'm too lazy to get my book. I know the 19s will run out of juice before 300rwhp. Even if they could stretch that far, you don't want to run injectors at the upper end of their range all the time. You can buy 24s and 30s all day...

I'm not exactly sure what you're asking. Stock heads should last a very long time as long as you keep it tuned. Make sure you have enough fuel pump and fuel injector to keep your engine fed. Going too lean will burn the engine up. The biggest disadvantage to stock heads is that they are...

the rev limiter is also nice, especially if you have a high horsepower motor.

I find it hard to believe that a fox body has a .32 drag coefficient. that's very good for a modern car, not to mention a 20 yr old design. I think the hardtop vette is .32 and it looks much more aerodynamic. :shrug: