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Old 08-31-2014, 06:36 PM   #71
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Just followed those instructions and I now have an 80mm throttle body on my v6. It seems to accelerate much much smoother. I think it makes a huge difference, will be getting a dyno run in next month so we will see

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---------- Post added at 05:36 PM ---------- Previous post was at 05:35 PM ----------

Total cost Brand new 80mm 5.0 tb from ebay $55

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Old 08-31-2014, 06:49 PM   #72
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Excellent

Glad to help
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Old 08-31-2014, 06:50 PM   #73
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What instructions? And can you run with the both to see a difference?

Luke 11:9-10 “So I say to you ...*search and you will find; knock and the door will be opened to you.
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Old 08-31-2014, 07:44 PM   #74
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Follow the instructions posted by lowbwan using a gt 5.0 throttle body. It is easy. The aluminum is soft and very easy to drill
I made a cardboard template of the stock throttle body to match up the holes on the 5.0 tb prior to drilling.

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Old 08-31-2014, 08:31 PM   #75
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Just search it, or what? I have never heard of it before this thread.

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Old 08-31-2014, 08:34 PM   #76
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It's in this thread a few posts back

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Old 08-31-2014, 08:36 PM   #77
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I will write it up again tomorrow

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Old 08-31-2014, 08:38 PM   #78
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It has been done but the theory of a bigger throttle body having benefits is argued alot. But why pay 400 for a 5 mm increase when you can junk yard dive and get an 80mm tb (12mm) increase for 50$. The gains have been seen on dyno runs but those guys want 300-400 for a stock 5.0 80mm tb and an adapter plate yet you don't even need the adapter plate. And the steeda intake hose fits on the 80mm tb (very tightly)

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Old 09-01-2014, 12:10 AM   #79
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Nice....post pics and the write up!
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Old 09-01-2014, 04:35 AM   #80
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Actually the instructions were in a private post. Here they are.

I tried to put pics on this site with no success.

I did not use an adapter plate. I used a straight 4 flute end mill in my drill press and cut new bolt holes in the TB. This is easy to do as long as you hold everything in place while cutting. I moved the 4 holes in toward the center 0.187" Use layout lines prior to making the cut. I can't emphasize enough to hold everything tight while the cut is going. The 80mm TB butterfly moves the opposite direction of your stock TB. Don't worry, it works just fine however, when you take off the OEM TB you will see some fins at the top and bottom of the opening. The top fins must be removed to allow the 80mm butterfly to move. I did this by grabbing them one at a time and breaking them off. I only removed the top fins. you must take time to align the 80mm TB to the gasket in the intake and not pinch it if you cut the holes correctly this will not be a problem, I also had to grind down the flanges on the stock bolts to allow them to clear the 80mm TB throat.

After the install, I re-flashed my tune just because. I then took it on a little 40 mile ride to help the computer "relearn" what my driving was like. By the end of the drive, all sequencing delays were gone and the thing runs like a champ.

Good luck
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Old 09-01-2014, 08:38 AM   #81
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Well then. I suppose all thats left now is a before and after dyno lol.
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Old 09-01-2014, 05:06 PM   #82
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So I took it all off today to double check my work and tb alignment. Everything was perfect. It is Soooo awesome to drive and such a cheap mod compared to an adapter plate or the bbk 73mm tb. Oh and my oil catch can is working wonders. The im was oil free and this was 3 weeks worth of oil in the catch can. Shame on those who say the cheap ebay catch cans don't work. Haha.

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Old 09-01-2014, 05:08 PM   #83
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Is it normal for a 3.7 with tb tune and intake to crap on a challenger r/t?

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Old 09-01-2014, 05:15 PM   #84
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I did it the only way way i saw justifiable- A used throttle body has no real depreciation functioning-wise.
I bought a BBK used for $25.00 and had the car dyno tuned.
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Old 09-01-2014, 05:16 PM   #85
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Nice. I got my new one on ebay for 50ish. Did you see some good gains from the tb?

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Old 09-01-2014, 05:20 PM   #86
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Do you have the 3.7 engine?

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Old 09-01-2014, 05:56 PM   #87
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3.8L
Not sure about gains. I had the whole slew of add-ons. CAI, TB, VAP intake spacer, under drive pullleys, full exhaust ect.. and then it was dyo tuned.
Larger throttle body isn't really needed until you add boost, I believe. But if you can find one for cheap, it wont hurt anything, that's for sure.
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Old 09-01-2014, 06:51 PM   #88
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Should one tune for the throttle body?

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Old 09-01-2014, 07:00 PM   #89
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A tune is said to be beneficial to dial in mods but I think it runs great with my 93 steeda tune and intake

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Old 09-02-2014, 09:11 AM   #90
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So no adjustment for the throttle body. Any comparisons in numbers you noticed?

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Old 09-02-2014, 09:39 AM   #91
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Haven't done the dyno yet, but it feels amazingly smooth and pulls hard mid to high rpm. Alot louder and the exhaust pops alot when revd. The exhaust is stock btw.

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Old 09-02-2014, 09:49 AM   #92
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Quote:
Originally Posted by 14mustang View Post
Is it normal for a 3.7 with tb tune and intake to crap on a challenger r/t?

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357 HP / 4200 LBS

305 HP / 3500 LBS

Assume losing 100 lbs is the same as gaining 10 hp, and vice versa, just do the math lol.
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Old 09-02-2014, 10:06 AM   #93
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Challengers are Hippos....
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Old 09-02-2014, 03:13 PM   #94
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Yeah both a 2013 challenger r/t and a 2014 charger r/t lost pretty bad at a track night I was at recently

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Old 09-04-2014, 08:49 PM   #95
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Update. Adding more mods next month than a custom dyno tune. The car runs great and the power band is very smooth. The 93 steeda tune was a little choppy before but seems more fluid now. Plus my mpg went up by almost 2. Wot driving of course gets worse than before but I drive alot so wot is not the preferred method for best mpg. Recommended this above any other tb mod. Cheap, eaay, and bigger than what 400$ at bbk gets you.

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Old 09-04-2014, 08:58 PM   #96
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I agree. Transitions are smoother and my mileage has also improved. This was an easy mod with good results. I highly recommend the 80mm TB swap.
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Old 09-05-2014, 12:17 AM   #97
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Any chance you would consider getting TB, drilling out the proper holes and reselling them?
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Old 09-05-2014, 08:34 AM   #98
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That's a good idea but I don't have alot of time for that. I am active duty navy and am gonna alot for it to be a regular thing.

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Old 09-05-2014, 10:29 AM   #99
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I don't have a shop or garage anymore to try this.
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Old 09-21-2014, 01:03 PM   #100
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Oh one more thing. Did you happen to shave off the fins of your upper IM?
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Old 09-21-2014, 01:08 PM   #101
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If the 80MM TB works, What are the chances of a 90MM BBK Throttle body working? =P
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Old 09-21-2014, 01:23 PM   #102
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If the 80MM TB works, What are the chances of a 90MM BBK Throttle body working? =P
That, a larger intake with a MAF and a tune would be your friend here, I guess. lol.

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Old 09-21-2014, 01:37 PM   #103
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Although i think its Too big for N/A applications I don't think there are any gains to be seen I'd like to see a side to side comparison between the two.. my point is if a 80mm tb works so well you would think BBK would have made there's in the ball park of that size.. there's is 73mm for a reason
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Old 09-21-2014, 01:41 PM   #104
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On another note this is something i may do down the line but I'm FI...
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Old 09-21-2014, 01:45 PM   #105
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Too big for N/A application I don't think there are any gains to be seen I'd like to see a side to side comparison between the two.. my point is if a 80mm tb works so well you would think BBK would have made there's in the ball park of that size.. there's is 73mm for a reason
Practically speaking, yes. I read this whole thread once again to get a gist of what's going on. Voltwings has provided some sick info on page 5/6 I guess.

Now talking about power and smooth driveability as per OP's observation. Even if there are no peak gains, it could be under the curve. 'comparatively' flat torque/hp response imo.

I'm sort of interested in this mod as well, though I have airraid intake. I wonder if that it create any fitment issues vs a steeda tube?

I am not really a pro DIY guy, so this is going to be another change get the plate/adaptor made lol


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