When Callaway stops using stock TBs I'll consider it.

 

 

 

17 Z06 here, I did the BMS first then the TM TB, I'm going to say the BMS made a far more noticeable improvement in throttle response then the TB. Not saying the TB didn't further help but clearly was not as noticeable.

 

This is the reason I went with the Tony Mamo option. His resume and showing us just what his throttle body does with lots of pictures, testing diagrams and more along with all of the positive reviews convinced me in the end. That and with black Friday sales I saved $40 or $50 and free shipping didn't hurt.
https://www.corvetteforum.com/forums...ts-inside.html Not only that, but a dyno test shows 16rwhp increase for a Z06 and a higher band across the entire range in power and torque. For just the throttle body. That is the Z06 of course, not the LT1 motor, but the additional airflow does benefit the supercharged LT4. If the filter does a bit more to get that airflow to the TB, then you might another 10 or so on an LT4.

As for not getting a core charge back, a lot of us have had the thought that if we were to throw a code for another reason related to the engine, a quick 15 minute swap would put us back to stock in case a dealership were to give you flak about the mod and start talking warranty invalidation. Obviously unless you carry it everywhere, a failure on the side of the road requiring a tow isn't going to allow for the swap.

But so far no codes and the stumble is gone. I hadn't done enough pulls to swear it makes additional power, but I do feel it helps if you are cruising at lower rpms and go full throttle (where that lip in the stock would potentially cause a slowdown of air as volume required suddenly jumps and the engine is trying to suck it in) and makes the throttle more responsive. Loving mine.

 

Thank you for posting that link! I never saw that post before and it was a great read.

 

It finally stopped raining here in Florida, and the roads dried out!
I put the TB on yesterday. It took me about 30 minutes, The extra time came from searching for the socket I dropped, that rolled to the exact center of the car! Anyways it was an easy install as other have said!
I have it on with a BMS air filter. The TB made a difference, but not as great at the BMS filter. The acceleration feels more linear now, and also quicker. I did not have any warning lights go on. I only have about 60 miles on it.
Would I do it again? Yes! But my butt dyno tells me the BMS filter returns more kick for the bucks!

 

The TB will actually get even better the more you drive it....the computer is playing catch up for awhile regarding adjusting the fuel trims

You just added 15% more airflow the motor can feed from (1000 CFM unit versus stock 850 CFM and a bunch more air speed and efficiency).

Also, not sure if your car is auto or stick but in a manual car the added throttle control (being more linear in nature) is worth the cost of admission alone as it really helps when sliding the clutch and working the throttle leaving a stop light etc. in normal day to day driving. the more responsive and more controllable/linear throttle perks are still there in an auto, it just not as "in your face better" as it is with a manual car with the fancy foot work required to smoothly get the car going from a dead stop.

I bet in a week the car feels even stronger

Enjoy the TB and Merry Xmas!

-Tony

 

It is an A8.
Thank you! I put another 60 or so miles on it today, and I thought it drove better...but then I decided it was just wishful thinking! It also seems to shift better-smoother-especially with down shifts. Is that me, or could your TB change that also?

 

NOT your imagination.....LOL

The TB changes the available airflow of the engine a great deal (especially in the lower throttle positions).....the computer needs to relearn some of this and as it does rewards you with even better performance as is starts to supply the added fuel for a more optimized AF ratio.

Regarding downshifts that is also the TB....once again the abrupt on or off nature of the poorly shaped stock TB makes the RPM/shifting alot more difficult for the computer to get right and the much more linear airflow delivery of the ported TB makes it alot easier for a smoother transition on the gear changes as you have noticed

I had a feeling you had an auto but as you already experienced the total gains from the swap still haven't been fully explored just yet. Takes at least a dozen complete cycles from dead cold up to full operating temp and a couple of hundred miles before all the fuel trims are better in line again

The factory LT1/LT4 TB in unported trim is simply horrible on this car (I assume you visually compared the two when you had the opportunity).....this mod is a real game changer and the price of admission and 10 minute install time is the icing on the cake!

-Tony

 

" this mod is a real game changer and the price of admission" ... is a understatement!
When I was a kid, fooling around with my '64 GTO, '65 GTO tri-power, Duster 340, several Mopars, the first, and cheapest thing I did was free up breathing. A good intake maniford, exhaust manifold, gasket mathced heads, and porting were cheap(er)mods, that gave high yealds, and didn't go into the engine!
The BMS filter, and the Mamo TB fall into this line of thinking of mine. I was considering a CAI, but for the return at this point it is not worth it.

 

My first C7 was a 2016 M7 Z06. The low end throttle bog, in my opinion, was terrible and in some instances, it felt unsafe. I did wind up purchasing the ported throttle body from Tony and it did improve the throttle reaction time and minimize the low end bog....but I still could feel it. I wound up selling that car and buying a Challenger Hellcat with a 6 speed manual transmission. Zero bog on that car and it wasn't because of the engine horsepower...it was turned that way from the factory. Well, I missed my Corvette and just bought another left over 2018 Z06 with only 2 miles on it....and it's an A8. I had it delivered to my home in an enclosed trailer and my only driving was to pull it into my garage. The engine was cold, well below operating temperature, but when I shifted it into D, I could feel the same low end bog as the 2016 had, creeping into the garage.
Now, I bored every one with this story, but it sounds like I have another Mamo polished throttle body in the near future and I was looking for some more feedback with regard to it's effectiveness in an A8 car, although Rogergcam seems to give it high praise. Any other comments?

 

I will answer this myself.....

Let me purposely send you a more aggressively ported unit and it will all but eliminate the bog.....BUT....there is a higher chance you may throw a CEL doing that so like most things in life there is no free lunch

However some cars would swallow up what I sending you and not throw a code so its not like what I'm proposing is highly risky....just that it has more risk than a standard port job that I offer. We both know you can clear the code and try it a few times and in most situations some driving is all it takes to go away as the computer learns but worst case you pay the shipping and I send you something a little more "normal" and you get rid of 80% of the issue and live happily ever after. That's the best two situations you will be looking at it your not willing to tune the car for the ore aggressive TB assuming your car doesn't like it.

I say try it.....you have nothing to lose but a minor amount of wrenching time and a few bucks in USPS shipping back and forth

You really have alot more upside here than downside without a doubt and 2018 is a much more forgiving ECM than say a 2017

Email me if you want to get this going and we can sort out all the details

tony@mamomotorsports.com

Regards,
Tony

 

If you get the aggressive ported TB and it throws a code, what is the outcome? You can still drive it you just have a light on the dash? Can you manually clear it?

Sorry I'm a newb here. Tony we spoke via e-mail a week or so ago.

 

Yes.....sometimes you just get the light on the dash and you clear it a few times and it goes away.....sometimes you get a light on the dash and it goes into limp mode as well (also can be cleared and go away but that's less of a bullish long term scenario to start with).

Honestly most of my customers are very happy with my standard ported product and most of them say the bog is completely gone....or just about. Its a massive improvement over stock. As a rule I don't want to ship a bunch of people aggressive units (and potentially deal with higher return ratio) but in certain situations I am willing to. This customer already owned one of my products and is looking to try another who is very keyed into the lag in the throttle which some customers are more than others so I offered to help

Try my standard unit....I'm sure you will be very pleased with it.....night and day improvement over stock

-Tony

 

Will do. Thanks.

 

I now have several hundred miles on my BMS and Mamo TB combo. All is working well, and not lights going on! The shifts feel much smoother, quicker, especially the down shifts, and is seems to wind up faster, and in a more linearel fashion. All this is just "seat of the pants" observations, nothing scientific to prove any of it, but it feels good!

 

agree, I did the PTB first and it helped a little. Did the BMS filter after and it was a noticable improvement

 

Installed mine yesterday on the Z06 and completely agree. Stumble isn't completely gone, but tremendously improved.