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  1. S

    new 392 but old exhaust

    I think you can get the 3" Magnaflow kit from Performancepeddler.com for something like $498 shipped . . . Also, it's my understanding that the Magnaflow mufflers are quieter than the Flowmasters I'm using the 2-1/2" Magnaflow kit, but I'm replacing the "X-pipe" with a dual inlet/dual...
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    new 392 but old exhaust

    Magnaflow has a complete 3" "Header Back" mandrel bent kit with an "X" pipe that includes 3" mandrel bent tailpipes . . . you might want to check them out . . .
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    CPRstreetmachines 1969 Turbo'd Pro-Touring GT2 build

    That looks like some pretty thin metal that is bolted to the shock towers--do you think it will be strong enough to do the job of keeping the towers in place? I have an export brace from a no-name manufactuer that is almost identical to this one, but the plates at the rear and on the shock...
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    Thermostat - is it necessary?

    Well . . . that's not exactly how it works--but let's talk about this for a mintue, and use your soup example: In your example, the "soup" (let's call this the coolant in the engine) is stationary--non moving; therefore, when you blow across it to cool it (airflow through the radiator), it...
  5. S

    Thermostat - is it necessary?

    I've worked on cars now for 34 years, and during that timeframe, I have *always* heard that a restriction is required, all the way back from my high school auto shop class, to the training I had while working at GM. Here's the reason--it takes time to transfer the heat of the engine to the...
  6. S

    Need some EFI recommendations

    I have a 98 Explorer shortblock, into which I installed a CompCams XE258HR camshaft, and installed a set of AFR 165 heads. I orignally was runing a Holley Street Avenger 770 on a Weiand X-Celerator single plane intake, and I recently converted over to the original Explorer intake with no EGR...
  7. S

    Ignition Switch

    No, that's the shift interlock; from the factory, there is a rod that goes down to the transmission and connects there so that unless the shifter is in "Park", you won't be able to remove the key.
  8. S

    Need some EFI recommendations

    I don't believe it's quite that simple--in order for it to work, you have to have several things if you're using an EEC-IV ECM (real high-level overview): 1.) You have to have some type of method for tuning the car the ECM (TwEECer, Quarter Horse, etc.), that you can use to input the...
  9. S

    JBA Headers Fitment Issue

    I finally found a link to the exact verison of the Patriot Clippster headers I have on my 70: Mustangs Unlimited - The Premier Source for Mustang, Shelby and Cougar Parts and Accessories If you look at the exits, you can see that they are at around the same place as the stock exhaust...
  10. S

    Popping under quick throttle opening

    I think if you look a couple of posts up, you'll see he posted that he found that the engine had a flat camshaft . . .
  11. S

    1970 radiator mount style

    NPD isn't the only place you can get the parts; Mustangs Unlimited, Dallas Mustangs and CJ Pony Parts all have this stuff, and may have better prices . . .
  12. S

    EFI on a 1966 Mustang

    Don't forget the fuel system; the Mass Air systems used a return system, where a pressure regulator sits on the fuel rail and returns excess fuel to the tank. So, you'll have to run an extra line just for that. You will also need to figure out how you're going to change from a low-pressure...
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    JBA Headers Fitment Issue

    I wonder if that's part of, or perhaps even all of the issue here . . . tx65coupe--it might not be a bad idea to take the car to a frame shop and see if there are some areas where it's sagging/collapsed; they might be able to get it straightened out and provide the clearance required . . .
  14. S

    JBA Headers Fitment Issue

    I'm sorry to hear about your misfortune with the JBA's; I don't know about YOU, but if it were me, I'd be calling up JBA and having them explain why their headers weren't fitting properly--and if they didn't have a satisfactory answer, I'd be sending them back for a refund . . . In this day...
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    Popping under quick throttle opening

    I still say it's a broken piston . . .
  16. S

    Need Help Picking Long Block

    I believe that the "Z" heads are actually GT40Z, so you would be using GT40's either way; the question would be: which GT40's other than the "Z" head are you referring to?
  17. S

    Compression Check

    Well, that's a close description . . . the actual volume you would consider would include the volume of the cylinder at bottom dead center, the volume of the head gasket and the volume of the combustion chamber added all together to arrive at the total you would divide when the cylinder is at...
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    What approach for a new engine?

    With an engine that size, I think you would see an improvement across the board using larger tube headers . . . heck, the 351C headers have a default size of 1-3/4", which is why there are the plates I've described!! As to whether you should dump the ones you have . . . well, they will...
  19. S

    What approach for a new engine?

    It's unlikely that you have 1-3/8" headers; the tiny factory headers on 5.0L engines are 1-1/2", and most aftermarket manufacturers use 1-5/8" on all their primary tubes, so that's probably what you have instead. A 393 or 408 would benefit by the use of 1-3/4" primary tubes instead of the...
  20. S

    Popping under quick throttle opening

    That doesn't sound like "popping" to me, it sounds more like a broken piston, because it only occurs under a load . . . You might want to take a compression test, and maybe try to put it under a load to see if you can determine which cylinder is making the noise. You may be able to...
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