so my buddy has a mustang...

**badazta** · 06-09-2007, 07:22 PM

So my buddy has a mustang,early 90's 5.0 I helped him work on it a bit here and there, tubalar k member roll cage slicks, the motor is built and a 150 shot of n.o.s. he's got gears auto with a stall and a manual valve body. He's running 8.6 in the 1/8 th mile!!! wtf? I ran 8.3 with exhaust, slp m.a.f. cold air kit and a tune. that 8.6 is with the nitrous. he ran a 9.3 on motor. I don't wanna hear oh its a ford or its a stang. just any ideas on why? he said he needs more gears. I think he's got 3:73s now. any help?

**310stanger** · 06-09-2007, 07:25 PM

Originally Posted by badazta

So my buddy has a mustang,early 90's 5.0 I helped him work on it a bit here and there, tubalar k member roll cage slicks, the motor is built and a 150 shot of n.o.s. he's got gears auto with a stall and a manual valve body. He's running 8.6 in the 1/8 th mile!!! wtf? I ran 8.3 with exhaust, slp m.a.f. cold air kit and a tune. that 8.6 is with the nitrous. he ran a 9.3 on motor. I don't wanna hear oh its a ford or its a stang. just any ideas on why? he said he needs more gears. I think he's got 3:73s now. any help?

Details are needed. What size engine, what cam, heads etc. what kind of ignition what timing etc. Going on here and asking a question that vague wont help you lol trust me lol He sounds like hes got a great chassis. My guess is he only has a mildly worked 302.

**86 IROC-Z** · 06-09-2007, 08:51 PM

bad driver?

**Crimson Sin** · 06-09-2007, 11:35 PM

Lots of stuff you need to fill in. But, I had a 93 Cobra years ago, did Trick Flow Stage II O-ring heads, E303 Cam ( think thats the number) Skorpion 1.72:1 needle bearing roller rockers, fly cut the pistons, 3.73 gears, Pro-M with sampling tube, list goes on and on , 100 hp dry shot and it was a pig..
I got spanked on the highway by the first GD'ed SS F-Body I ran into.. White w/ T-Tops.. sorta like what I own today.. Fox Bodies just aren't that fast unless it's turbo'd or Stroked. Just my .02 worth. I forget what year break it is, but theres a cut off from Mass Air to Speed Density and one of them just aint that friendly to modding. I thought 91-93 had a nice solid lower end in them, but it's been a LONG time since I sat in anything with an Oval on the hood. There's a guy over on LS1Tech that runs a few 5.0s..One's a sick turbo'd LX Notchback, he works at Marysville Custom Auto or something, he would be a good source of what to do on a 5.0 I would think.. Last time I was up there they were doing a TT LS1 in a 56 Chevy. a 700 rwhp Lightning and were tweakin out a 530 fwhp Accord. They some crazy fellahs up that way.

**SeVeReDiStOrTiOn** · 06-10-2007, 09:48 AM

Originally Posted by 01T-TopToy

Lots of stuff you need to fill in. But, I had a 93 Cobra years ago, did Trick Flow Stage II O-ring heads, E303 Cam ( think thats the number) Skorpion 1.72:1 needle bearing roller rockers, fly cut the pistons, 3.73 gears, Pro-M with sampling tube, list goes on and on , 100 hp dry shot and it was a pig..
I got spanked on the highway by the first GD'ed SS F-Body I ran into.. White w/ T-Tops.. sorta like what I own today.. Fox Bodies just aren't that fast unless it's turbo'd or Stroked. Just my .02 worth. I forget what year break it is, but theres a cut off from Mass Air to Speed Density and one of them just aint that friendly to modding. I thought 91-93 had a nice solid lower end in them, but it's been a LONG time since I sat in anything with an Oval on the hood. There's a guy over on LS1Tech that runs a few 5.0s..One's a sick turbo'd LX Notchback, he works at Marysville Custom Auto or something, he would be a good source of what to do on a 5.0 I would think.. Last time I was up there they were doing a TT LS1 in a 56 Chevy. a 700 rwhp Lightning and were tweakin out a 530 fwhp Accord. They some crazy fellahs up that way.

Musta been a bad beating for you to go and buy the same car

**310stanger** · 06-10-2007, 12:14 PM

87-93 marked the "aero" fox. 87-88 were the years that they used the speed density system. 89-93 was mass air flow. The speed density does not like mods at all. Put a cam in there and the computer freaks out with the SD.

**310stanger** · 06-10-2007, 12:17 PM

Originally Posted by 01T-TopToy

Lots of stuff you need to fill in. But, I had a 93 Cobra years ago, did Trick Flow Stage II O-ring heads, E303 Cam ( think thats the number) Skorpion 1.72:1 needle bearing roller rockers, fly cut the pistons, 3.73 gears, Pro-M with sampling tube, list goes on and on , 100 hp dry shot and it was a pig..
I got spanked on the highway by the first GD'ed SS F-Body I ran into.. White w/ T-Tops.. sorta like what I own today.. Fox Bodies just aren't that fast unless it's turbo'd or Stroked. Just my .02 worth. I forget what year break it is, but theres a cut off from Mass Air to Speed Density and one of them just aint that friendly to modding. I thought 91-93 had a nice solid lower end in them, but it's been a LONG time since I sat in anything with an Oval on the hood. There's a guy over on LS1Tech that runs a few 5.0s..One's a sick turbo'd LX Notchback, he works at Marysville Custom Auto or something, he would be a good source of what to do on a 5.0 I would think.. Last time I was up there they were doing a TT LS1 in a 56 Chevy. a 700 rwhp Lightning and were tweakin out a 530 fwhp Accord. They some crazy fellahs up that way.

Your mustang was a pig because you had stage 2 ported Trickflows with baby cam ie e303. You should have put a nice split pattern cam in there and it would have pulled much harder. High flow heads are worthless if you dont use them right. What intake manifold did you use? Injectors? fuel pump?

**MagicMan** · 06-10-2007, 12:57 PM

Originally Posted by 310stanger

87-93 marked the "aero" fox. 87-88 were the years that they used the speed density system. 89-93 was mass air flow. The speed density does not like mods at all. Put a cam in there and the computer freaks out with the SD.

88 was mass air

**MagicMan** · 06-10-2007, 12:57 PM

we need more info on his car...

**310stanger** · 06-10-2007, 03:06 PM

Originally Posted by MagicMan

88 was mass air

I'm pretty sure that was only on california cars though bro. I have the official 5.0 technical reference book I can look it up. All I know is with stage 2 twisted wedge heads that car should pull like a raped ape, his combo is mismatched somewhere, the one part I could find is the dinosaur e303 cam.

**MagicMan** · 06-10-2007, 03:39 PM

Originally Posted by 310stanger

I'm pretty sure that was only on california cars though bro. I have the official 5.0 technical reference book I can look it up. All I know is with stage 2 twisted wedge heads that car should pull like a raped ape, his combo is mismatched somewhere, the one part I could find is the dinosaur e303 cam.

nope

**Marc 85Z28** · 06-10-2007, 06:27 PM

Originally Posted by MagicMan

nope

Nope what? 87-88 5.0L Mustangs were speed density equipped with the exception of late 88 California cars.

To the original poster: We need a lot more info. But generally speaking, a Fox Mustang with a "built motor", a 150 shot, through a stalled auto with gears, suspension, and sticky tires should be an 11 second car even poorly driven!

And anyone looking to run a B, E, F, or X cam in a 5.0L today should be shot. They really only worked well with the GT40 or Edelbrock stuff. The TF and AFR heads work very well with a much more modern cam.

**badazta** · 06-10-2007, 06:33 PM

I tried calling him today and didn't get an answer. I do know that he now has i tick in the top end (push rod or something) He has a windows switch for the n.o.s. but not a wot switch so his nitrous stayed on when he wasn't on it. I feel bad for him he's ben working on this car for about 6 years. when I find out more I'll let you guys know.

**310stanger** · 06-10-2007, 06:55 PM

Originally Posted by badazta

I tried calling him today and didn't get an answer. I do know that he now has i tick in the top end (push rod or something) He has a windows switch for the n.o.s. but not a wot switch so his nitrous stayed on when he wasn't on it. I feel bad for him he's ben working on this car for about 6 years. when I find out more I'll let you guys know.

My top end ticks but its because my 24 lb ford racing injectors are pretty noisy and I have a trickflow stage 1 cam as well.

**310stanger** · 06-10-2007, 06:56 PM

Originally Posted by Marc 85Z28

Nope what? 87-88 5.0L Mustangs were speed density equipped with the exception of late 88 California cars.

To the original poster: We need a lot more info. But generally speaking, a Fox Mustang with a "built motor", a 150 shot, through a stalled auto with gears, suspension, and sticky tires should be an 11 second car even poorly driven!

And anyone looking to run a B, E, F, or X cam in a 5.0L today should be shot. They really only worked well with the GT40 or Edelbrock stuff. The TF and AFR heads work very well with a much more modern cam.

You sir know 5.0's! I would think a built motor and 150 shot should be real low 11's and even high 10's and thats without a stroker.

**310stanger** · 06-10-2007, 06:58 PM

alphabet cams FTL! alphabet cams are what mustang guys call the Ford Motorsports cams. They are extremely popular but ancient cam technology and get smoked by the current stuff.

**badazta** · 06-11-2007, 04:19 PM

OK so he has a 302 bored .30 over world heads for a 351w he's using longer pushrods for this. cam is a custom grind 502/498 284 duration valve lobe is 110. All the basic bolt ons msd ignition, maf, throttle body, cold air kit and a cobra intake. hope this helps you help me. Thanks

**310stanger** · 06-11-2007, 04:32 PM

Originally Posted by badazta

OK so he has a 302 bored .30 over world heads for a 351w he's using longer pushrods for this. cam is a custom grind 502/498 284 duration valve lobe is 110. All the basic bolt ons msd ignition, maf, throttle body, cold air kit and a cobra intake. hope this helps you help me. Thanks

Ok so he has a 306 with a custom cam, thats a good start. the heads are ported? aluminum? cast iron? world heads arent bad heads but theres better for the 5.0s out there ie trickflows, edelbrocks, afr's. What kind of fuel system does he have? My guess is he might not have adequate fuel delivery to feed that big top end. Or he could even have too big an injector size. a set up like that I'd run what I have on my car. 24 lb inj, with an adjustable fuel pressure regulator. start the fuel pressure at 39 lbs and add more as needed. try advancing the timing a lil but dont let it ping. make sure his maf is calibrated to his injectors.

**badazta** · 06-11-2007, 04:48 PM

He has 24lb injectors, fuel cell, pump, and regulator. The fuel components are all aeromotive parts the fuel injectors are set at 40lbs. The pinging started after the 3rd run with nitrous and now it won't even idle. He has good compression as he did a test today. (190's) I think he said in every cylinder. The heads are cast and ported. Hey thanks for your help.

**Marc 85Z28** · 06-11-2007, 06:02 PM

What were his trap speeds? 60' times? Wet shot?

And it almost sounds like a well thought out combo that hasn't been fine tuned, with someone who can't drive it, AND the nitrous was most likely NOT working...

Finally, like stated before: running an aftermarket MAF sensor without calibrating everything else can cause all sorts of problems, including a severe lack of power. Either have it properly calibrated to the fuel system or do an EEC piggyback.

Edit: with his light weight, powerband, and loose converter, 3.73s should be adequate unless he's running tires larger than 28" diameter. Gearing is likely not his problem.