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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 04-09-2013, 02:29 PM
Roguebishop Roguebishop is offline
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Default Throttle body question

DO what kind of improvements are we looking when we go from stock to say an 87mm

what are the real benefits MPG, HP thinking about placing an order for a TB and Catch can vs getting exhaust right now.

real opinions.

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Old 04-09-2013, 02:37 PM
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imo, you want see much gain from just a ported throttle body with out exhaust (cant take in no more air than you can put out) but the catch-can is a must.
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Old 04-09-2013, 03:13 PM
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I can't remember the name of the magazine, Modern Mopar?, but they did a test of a CAI and a throttle body on a Magnum. To my suprise, the CAI picked up quite a bit of horsepower, maybe 20, but the throttle body picked up less than 5 as I recall. As I recall, the Magnum had some mods, like a tuner and exhaust. I've seen this talked about elsewhere, if you have a mostly stock vehicle, the throttle body won't pick up a lot of power.
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Old 04-09-2013, 03:22 PM
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The throttle bodies do show some gain, your best gain from the throttle body is the improved throttle response , your best bet is to knock all three out at the same time CAI, muffler, and throttle body, however as stated above would definitely recommend a catch can

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Old 04-09-2013, 03:30 PM
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These new trucks are not like the old ones when I grew up, no carberators , can't ajust anything by myself these are completly controled by a computer and because of this not every truck will act the same.

If you live were the temps are cooler or real hot makes a difference, size of tires, and lot of other things that can affect the performance of your truck.

All I can use is common sence so if your going to put something on your engine that brings more air in you need to be able to process that air correctly and get rid of it quickly

A tb will get more air in but if you still have the stock square muffler you can't get it out fast enough. A catch can I don't think will do much as far as HP but does make sence that it will keep your tb and intake system cleaner which is a good thing.

This is the way I decided to proceed with my build
First thing I did was get a good low restriction muffler the a good air intake (vararam) next a larger tb and in two weeks I will get a trinity with the whitelighting program and transmission tune.
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Old 04-09-2013, 08:48 PM
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I always consider a throttle body to be a supporting mod. It will never blow you away just by bolting it on, but it helps take advantage of your other mods. You can have a read through this thread if you want to learn more about choosing the proper TB for your mods.

If you don't want to be cleaning your intake manifold and throttle body all the time, then you want to install a catch can. Plain and simple fact is they keep crap out of the intake manifold and makes maintenance so much easier.
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Old 04-10-2013, 03:01 PM
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I agree, several years ago I bought a throttle body & only other mods I had on my Challenger was ,cai,& cat back. I talked with the vendor, and he explained the venturi area was the same, whereas entrance, and exit were cnc'ed thus increasing velocity, not so much cfm. Which that equates out to some increase in throttle response, not so much in hp. The analogy he used was, like squeezing a garden hose.
I'm an old carb man myself, which I'm very familiar with nogo gauges(ha).
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