80mm Overkill TB w/ K&N Typhoon Cold Air Intake System - Chevy Impala Forums
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post #1 of (permalink) Old 03-12-2016 Thread Starter
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80mm Overkill TB w/ K&N Typhoon Cold Air Intake System

The Overkill big bore TB is very easy to install on your K&N intake system (PN: 69-4526TS)
With Overkill, you will get
  • 80MM TB
  • 0.512” Aluminum adapter/spacer for Intake/TB
  • Overkill vapor canister relocate adapter aluminum plate
  • A silicon hose (it was too short for my application). All you need is a 3/8” (9.5mm) hose (fuel type is perfect) that is 7” long (18cm). But this hose may come with your kit if you notify Will.
  • Transition Hose (Coupler Reducer), at this present time, it’s not in Overkill TB kit. The hose could be (ex: Vibrant, PN: VIB2774) Specs: 3” X 3.5” X 3” long.
Very easy to install, I also included pictures on the K&N tube with the inside diameter sizes. 74mm entering the TB and the remaining of the tube, the inside is 80mm in dia.
If you want to kick it up a notch, you can always modify the K&N tube by cutting off the 74mm part and add a longer coupler from the tube to the TB. I did a few research, and the coupler that would work would be the HPS 3.5” (89mm) X 3.75” (95mm) X 6” long (PN: HTSR-350-375-L6-BLK (for black) or -BLUE (for blue)
At this present time, I’m running the TB with the Vibrant coupler (see picks), and it’s performing very well. Later on, I may slightly massage the inside OEM 79.5mm intake to match the Overkill 80mm and do the HPS coupler. Then, hopefully, I will get some results to share with all of you. The track only opens on the 23 April, but will try to have a dyno session early April?
NOTE: If you do not have Overkill tune, meaning if your ECU is stock, Trifecta or other, the Overkill 3.5” K&N retro-fit kit will not work, for this, you really need Overkill tune application.
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post #2 of (permalink) Old 03-12-2016
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@ImpalaLFX13 - I just got done installing @ VMAX Ported throttle body and while looking at your pics, I noticed that your 80mm throttle body looks l"upside down" compared to stock/Vmax? Was just curious if it could even be installed upside-down by accident? On my stock/VMax throttle body, the black part is on the right side, while your is on the left (basically, your looks upside down in comparison).

Just curious if a) it could even be installed upside down by accident and b) what would happen if it was (would it still work OK?).

I have a feeling that it's just designed differently than the stock throttle body, but just thought I'd mention it (was curious if it would even matter if it was installed upside down.).

Thanks!

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post #3 of (permalink) Old 03-12-2016 Thread Starter
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jtrosky,

you are OK, the Overkill is bigger, and for clearence purpose its clock the other way. What its important its the inside throttle plate, its exactly the same way.
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Thanks for this LFX13
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Any idea what would happen if you installed a throttle body upside down? Just curious now!

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Position of the TB blade, if reverse, probably would make the idle bounced and rev all over the place. I would not advice, just think the TB activated by a wire, you want the cable to pull and open the plate in one direction. Same goes for the E-TB. Reversing the plate, you are just looking for trouble.
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Whats really strange is that when I look at a picture of the stock throttle body next to the 80mm throttle body, it looks to me like the 80mm throttle body actually is "configured" the same as the stock throttle body (with the black part on the right). Take a look at this comparison picture posted by @overkill:

http://forums.drivepe.com/threads/80...he-lfx.251069/

Now I'm positive that the black part of the stock throttle body is on the right side when installed (so the stock TB is upside down in this pic). Now if you were to orient the 80mm body the same way (with the black part on the right side), the angle of the throttle plate would match the stock TB exactly.

From what i'm seeing, it seems like your is installed upside down?

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I see what you mean. Not sure where that TB came from, Cadillac, etc. But, my VMAX was the same direction that of the stock and the Overkill
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Glad to see you got this. Excited to see gains and track times!
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Quote:
Originally Posted by ImpalaLFX13 View Post
I see what you mean. Not sure where that TB came from, Cadillac, etc. But, my VMAX was the same direction that of the stock and the Overkill
So the way your Overkill throttle body is (black part of the left) is the same way that you stock and VMax TB was?? Mine is the exact opposite (stock and VMax have the black part on the right).

Not a big deal - I'm just curious, that's all.

Thanks!

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The 80mm throttle body is oriented that way due to the reach of the electrical connector.

It's actually beneficial for the throttle body to be oriented with the blade opening rearwards at the top, which is how the 80mm is oriented; on other platforms people have noted how half throttle feel is improved.

Functionally it doesn't matter though. The 12-13 Impala, Camaro, ATS, CTS have the throttle body upside down with the connector to the bottom. The 14+ 9th gen Impala, LaCrosse, XTS, Acadia, Equinox, Colorado and etc have the same throttle body 180* with the connector up.



Computer Tunes for all 7th 8th and 9th Gen Impalas including 3.6 Direct Injection V6, 3800 Supercharged V6, 5.3 LS4 V8 and 3500/3900 V6
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Very interesting, @Overkill! So really, the blade can open either way and still work fine (rearward at top or bottom)? With my 2012, the blade opens rearward at the bottom with the stock and VMax TB (which is really just a stock TB). So if the electrical connection reaches, I could install it upside down and it will work just as well, if not better? I just assumed that it would need to be a certain way - sounds like that was a bad assumption!

Not that I'm going to do that, but just want to make sure I understand what your saying (just curious).

Thanks for the info!

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post #13 of (permalink) Old 03-14-2016
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Quote:
Originally Posted by jtrosky View Post
Very interesting, @Overkill! So really, the blade can open either way and still work fine (rearward at top or bottom)? With my 2012, the blade opens rearward at the bottom with the stock and VMax TB (which is really just a stock TB). So if the electrical connection reaches, I could install it upside down and it will work just as well, if not better? I just assumed that it would need to be a certain way - sounds like that was a bad assumption!

Not that I'm going to do that, but just want to make sure I understand what your saying (just curious).

Thanks for the info!

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perhaps more importantly, how does the vmax work - worth it?
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Juma,


in 2013, I dyno'ed MY2013 (on a MD250)


Stock: 226whp @ 6,210rpm and 213wtq @ 5,040rpm (on regular fuel)
VMAX only: 228whp @ 6,235rpm and 216wtq @ 5.080 (on regular fuel)
VMAX only: 228whp @ 6,210rpm and 219wtq @ 4,905rpm (on Shell Vpower*)
(*Then all other dyno's shared in this forum are on Vpower)


The VMAX works fine (it's a good product, it improves on a OEM) for normal street usage. But, if you install a tune that pushes your RPM to 7,000rpm, the stock/VMAX 72mm size is a restriction,.You need to make the LFX engine breathe, the Impala (8th Gen) has the smallest intake in volume vs. the other LFX engines.


I hope this info helps you in what you want to achieve?

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And supposedly, the VMax TB is not really for power gains, but for improved throttle response. I haven't driven my car enough yet since installing the VMax TB, but others swear by it.... Although, to be honest, with the way I tuned my Driver Demand tables, throttle response was VASTLY improved over stock before the VMax. I recently reverted back to the stock Driver Demand tables for testing purposes and my 2012 felt like a 6000lb slug! :-) The stock DD tables only lasted for a few hours before I put my modified versions back on!

Basically, I used the LFX Camaro Driver Demand tables and just modified them slightly for my preferences.

Will definitely report back on my thoughts about the VMax TB after I've spent more time with it.

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Thread Is the 80mm Overkill TB enough for the LFX 3.6L engine? | Chevy Impala Forums | BoardReader This thread Refback 06-15-2016 10:24 AM
8th Gen Engine Performance on Chevy Impala Forums | BoardReader This thread Refback 03-26-2016 01:02 PM

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