This is topic 70mmor75mm tb for a 4.6L??????? in forum Tech Talk at Northern California Ford Owners  .


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Posted by GT_R (Member # 4941) on :
 
Is a 75mm tb too much air for a 2004 GT with BBK cold air Trick Flow plenum off ford x pipe pullys diablo predator programmer 3:73 gears or would my car perform better with a 70mm?

[ December 19, 2004, 09:34 PM: Message edited by: GT_R ]
 

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Posted by Yellow94GT (Member # 431) on :
 
I read in a 5.0 mag a few months back about a 75mm vs 70mm comparison on n/a and boosted setups. In the write up the 75mm made more power n/a than the 70mm. These are the same results as when tested on a 302 based motor.

I say the bigger that better
 

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Posted by bunchmyfunky (Member # 360) on :
 
I have a 70mm TB I'm going to be upgrading to a Dragon Plenum with a 75mm TB. Lots of people are running 75mm TBs NA. I would check out a few of the other sites that are 4.6 oriented they have some independent write up's on the upper plenums and 75mm TBs with dyno graphs.
 

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Posted by GT_R (Member # 4941) on :
 

quote:

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Originally posted by bunchmyfunky:
I have a 70mm TB I'm going to be upgrading to a Dragon Plenum with a 75mm TB. Lots of people are running 75mm TBs NA. I would check out a few of the other sites that are 4.6 oriented they have some independent write up's on the upper plenums and 75mm TBs with dyno graphs.

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