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Old 10-14-2009, 10:00 PM   #1
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Default Throttle Body vs. Underdrive Pulleys

I am just trying to decide between the two for my next mod. Each seem to give the same amount of hp but the TB will lower my mpg and the Pulleys ruin my air conditioning. Or should I get some Delete plates? The video in my sig is what I have done so far.
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Old 10-14-2009, 10:14 PM   #2
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4.10s. .
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Old 10-14-2009, 10:23 PM   #3
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Who says UDP's ruin your A/C? Not according to the forum members. Plus, UDP's are more of a sure couple of ponies compared to an aftermarket TB on a NA or non-modified-internally S197 4.6L. And aftermarket TB's have been known to be an install nightmare to an unacceptable (IMO) population of those that HAVE installed them.
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Old 10-14-2009, 10:28 PM   #4
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i know i've got a new edge, and maybe i don't apply. but i have both, and honestly the UDP's where tougher, and the TB and plenum was a breeze. i got a great deal from ebay.
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Old 10-14-2009, 10:46 PM   #5
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Yeah, save your $ no way to the TB. Go with the UP if you dont plan on going FI. I would get the 3.73 or 4.10 gears over either one. Good luck.
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Old 10-14-2009, 10:58 PM   #6
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+1000 on the gears


otherwise, run the U/D pulleys. the throttle body is a spurious gain and has lots of issues to get them tuned.

alternator wise, it will be spinning slightly slower than normal at idle. if it concerns you, use your tuner to bump idle up 100 RPM to offset the lower RPM


U/D pulleys WILL NOT HARM your alternator. the only effect will be a slightly lowered charge capacity while at IDLE only. it will operate as normal otherwise.



get gears instead. about $100-200 more overall, but you will see actual real world results, and the butt dyno will be very happy
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Old 10-15-2009, 01:14 AM   #7
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Gears have been my best upgrade to date. I've read way to many negative posts about TB's to even consider it.
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Old 10-15-2009, 01:43 AM   #8
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I would do UDP's long before the TB. Gears are probably your best bet, but will cost more. I really like my Coast aluminum driveshaft, but again that is quite a bit more than UDP's or a TB.

If you race your car you would probably be best served getting some suspension mods over any of these.
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Old 10-15-2009, 06:31 AM   #9
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Quote:
Originally Posted by Nuke View Post
Who says UDP's ruin your A/C? Not according to the forum members. Plus, UDP's are more of a sure couple of ponies compared to an aftermarket TB on a NA or non-modified-internally S197 4.6L. And aftermarket TB's have been known to be an install nightmare to an unacceptable (IMO) population of those that HAVE installed them.
Quote:
Originally Posted by S197winstang View Post
Yeah, save your $ no way to the TB. Go with the UP if you dont plan on going FI. I would get the 3.73 or 4.10 gears over either one. Good luck.
Quote:
Originally Posted by Tylus View Post
+1000 on the gears


otherwise, run the U/D pulleys. the throttle body is a spurious gain and has lots of issues to get them tuned.

alternator wise, it will be spinning slightly slower than normal at idle. if it concerns you, use your tuner to bump idle up 100 RPM to offset the lower RPM


U/D pulleys
WILL NOT HARM your alternator. the only effect will be a slightly lowered charge capacity while at IDLE only. it will operate as normal otherwise.



get gears instead. about $100-200 more overall, but you will see actual real world results, and the butt dyno will be very happy

what they said!
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Old 10-15-2009, 08:11 AM   #10
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i have them both and all i can say is that i wish i had the $300 back from the throttle body
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