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Rob
GenIII
6/12/2002
15:21:53
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 Subject: RE: The best mod for 4.7s under $500 is...
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Thats cool I understand.The data is there for all to see now so but it will still be personal choice so you guys should quit arguing over something so small!
 180 thermostat,Z-Tube,Magnaflow exhaust,jet mod,,Auto lite 3923's,SS bumper cover,Stull full billet grill and shell,SS rollpan,Apc clear corners&euro tails,DJM 2inch control arms & 3 inch block
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Duner
Dodge Dakota
JOIN HERE
6/12/2002
21:16:26
| 2 tenths is a good gain!
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I view the PCM as being the starting point for all mods on the 4.7.... but I would never say that a larger TB is without value! I made good power before adding it, but it certainly added even more once I got it on there.
I didn't get the 72mm F&B TB until after I had already been running 12s with the turbo, so I started with the ported stock 68mm and the turbo originally. The F&B billett TBs were just being released when I built my turbo system. I never really got a chance to play with it like I would have wanted to.
I never got the 72mm TB dyno'd compared to the ported 68mm, but I did swap them back and forth at the track when I ran my truck NA in Tucson. The 72mm TB was good for almost exactly 2 tenths of a second and just about 2 mph. My guess is that my F&B 72mm TB would be good for roughly 15-18 rwhp over the ported stock 68mm TB. That would probably be a pretty decent jump over the stock 65mm TB that came on the truck. (3 to 4 tenths?) Here again, that's at altitude. At sea level the differences could possibly be larger.
I have recently built a new intake system from the turbo that incorporates the 72mm F&B TB as part of the system. The 68mm is outa there! I'm running an air/water intercooler that mounts directly to the front of the TB. I hope to take some pics of the set-up and get them online fairly soon.
Either that or we can all wait for them to show up in some magazine? ;>) ......
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matt
Dodge Dakota
JOIN HERE
6/19/2002
23:18:54
|  RE: The best mod for 4.7s under $500 is...
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I want to remove the third cat... is it ok to do this, and does it make a difference in sound and/ or performance? is there a sensor after the cat?
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Clevite 77
Dodge Dakota
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6/20/2002
00:05:54
| RE: The best mod for 4.7s under $500 is...
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remove it, unless you wan't low end, along with a 2 chamber muffler running out to duals, I gaind a very nice upper R pull. I did however loose low end torque.
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matt
Dodge Dakota
JOIN HERE
7/04/2002
00:27:56
| RE: The best mod for 4.7s under $500 is...
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does the 4.7 even have 3 converters? i can only see one.
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xplikt
Dodge Dakota
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7/04/2002
00:44:22
| RE: The best mod for 4.7s under $500 is...
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Depends on the year. Some only have one, but the newer or Calif. ones have a pre-cat right after the exhaust manifold before it comes down to the Y pipe.
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