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Old 04-13-2016, 11:47 PM   #1
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Should I?

I'm considering installing a 85mm throttle body. Would it be worth the $450 to do? I'm installing a cat back system with the aero 3030, cold air intake, flex alite 183 fan, and 180 degree t-stat and tuning with a Diablo Trinity as soon as I get back from this deployment. It's a 08 QCSB Sport 4x4. Thanks in advance for the replies.

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Old 04-14-2016, 03:43 AM   #2
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There seems to be a lot of talk recently about going with a bigger throttle body. Especially since your going with a custom tune. I'd say go for but see if you can put an 87mm on there since they're pretty much the same price.
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Old 04-14-2016, 07:30 AM   #3
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Old 04-14-2016, 10:50 AM   #4
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Yep many say the bigger the better for a Hemi and you can't over do it - others disagree - but it should breathe to the capabilities of your build...


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Old 04-14-2016, 12:15 PM   #5
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You are much better off with an 85mm or 87mm ported throttle body than you are with an 85mm straight bore throttle body like the Arrington or BBK unit. The ported throttle bodies are tapered on the backside to increase airspeed and give you some power gains in the low-mid rpm ranges. A true bore 85mm is going to move more air to make a little more power at high rpms, but it is going to come with a loss of low to mid range tq...not what you want for a daily driver.

The tapered port 85mm and 87mm throttle bodies are going to show gains across the entire rpm band.
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Old 04-14-2016, 12:56 PM   #6
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Yes the tapered one is suggested add some boost and go 90mm. Either way they will work regardless of what you get.
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Old 04-14-2016, 05:04 PM   #7
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This is really not hard to do to your stock one. I opened mine up to match the opening of the intake manifold front and back. (3 3/8" or 85.725mm approx.) Some time and a dremel tool and wala a ported and polish TB.
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Old 04-14-2016, 05:28 PM   #8
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Very nice job TooCool.
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Old 04-15-2016, 10:12 PM   #9
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I ordered a 87 mm from Moes. Really looking forward to getting home and showing my Ram some TLC! Thanks for the info.
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Old 04-16-2016, 08:27 AM   #10
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The great debate, IMO, no single mod does much on its own. But the end results are greater than the sum of the parts.
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