4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.
View Poll Results: Which nets more RWHP
Steeda Underdrive Pulley
5
33.33%
A Plenum/TB
10
66.67%
Voters: 15. You may not vote on this poll

Pulley's or Plenum/TB

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Old 09-10-2008, 10:31 AM
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defconfire
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Default Pulleys or Plenum/TB

Whats worth it. As for the plenum any suggestions, I am not paying for an Accufab.

Last edited by defconfire; 09-10-2008 at 10:37 AM.
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Old 09-10-2008, 11:02 AM
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JTanew
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UDPs is what i voted plus it will help in the long run
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Old 09-10-2008, 11:12 AM
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defconfire
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I was thinking about pulleys because it is a solid consistent gain,

but I have heads and stage 1 cams and i'm not sure if I am exceeding the flow capabilities of the stock tb/plenum.
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Old 09-10-2008, 11:22 AM
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JTanew
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well run the numbers together of the CFMs on the heads and cams and the capability of the plenum...you will get more horse from the plenum prolly but how often will that change UDPs are a long term investment plus prevents the Cavitation of the waterpump
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Old 09-10-2008, 02:15 PM
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boduke0220
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pro products has some cheap TB's and plenums
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Old 09-10-2008, 02:27 PM
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35thAnni99GT
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Forget both of them. Meziere Electric Water pump.

The more you do to the car the more the water pump will help. Especially, being an open track kind of guy that spends lots of time higher up in the band when a traditional water pump uses way more power than idling in traffic.
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Old 09-10-2008, 03:21 PM
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defconfire
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The only reason I am scared to go switch to an electric water pump is because if your alternator goes(which has happened to me before). Your water pump will drain the battery and your car can overheat....

On the other hand I know there is probablly an equal risk of blowing up my waterpump.
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Old 09-10-2008, 03:35 PM
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n0th1n2kn0vv
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If you dont think your getting enough air because of the cams, then go with the plenum.

But then again... UDPs dont cost much, you could do both if the money is available.
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Old 09-10-2008, 03:53 PM
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35thAnni99GT
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Originally Posted by defconfire
The only reason I am scared to go switch to an electric water pump is because if your alternator goes(which has happened to me before). Your water pump will drain the battery and your car can overheat....

On the other hand I know there is probablly an equal risk of blowing up my waterpump.
It's not like it's instant boom though and I've never seen an alternator just go out like a lightbulb. More like, diminishing over time. You'll see the change in temps and voltage and if it does, so what? Alternators are a 10 minute deal on that car.
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Old 09-10-2008, 04:00 PM
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Originally Posted by 35thAnni99GT
It's not like it's instant boom though and I've never seen an alternator just go out like a lightbulb. More like, diminishing over time. You'll see the change in temps and voltage and if it does, so what? Alternators are a 10 minute deal on that car.
Agreed. Even if the alternator stop working, the battery light will show up and you can run a test on your battery to see if its charging.
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