[DeuceCam]

Curious about this as well based on claims. Are the noted benefits present without a tune? Any cons to using it without a tune?

[2SS Capt]

Originally Posted by DeuceCam

Curious about this as well based on claims. Are the noted benefits present without a tune? Any cons to using it without a tune?

He does claim that all the gains are without a tune...

[KingLT1]

Originally Posted by DeuceCam

Curious about this as well based on claims. Are the noted benefits present without a tune? Any cons to using it without a tune?

It will just depend if the throttle body causes extremely reduced idle timing.

I run into this alot with "Another" companies Ported Throttle Body that claims no tuning required. The idle timing drops to 0 to -4 degrees. A lot of people running these likely don't even know it's happening and mysteriously wonder why their cats burnt up.

[DaveC113]

Originally Posted by KingLT1

It will just depend if the throttle body causes extremely reduced idle timing.

I run into this alot with "Another" companies Ported Throttle Body that claims no tuning required. The idle timing drops to 0 to -4 degrees. A lot of people running these likely don't even know it's happening and mysteriously wonder why their cats burnt up.

Exactly why I asked about why you might want a tune when changing something so critical. It is going to compensate for seeing more air than it expects somehow...

[Junction65]

Originally Posted by DaveC113

As far as not tuning for the new TB, it seems like there will be more air than the system expects, does the MAF and/or MAP sensor compensate with no problem?

Originally Posted by KingLT1

"Another" companies Ported Throttle Body that claims no tuning required. The idle timing drops to 0 to -4 degrees. A lot of people running these likely don't even know it's happening and mysteriously wonder why their cats burnt up.

Interested in the responses to these posts.

One would think the MAF should compensate for the slight increase given stock engine, no other mods. Curious if that change would impact idle timing with this throttle body.

[KingLT1]

Originally Posted by Junction65

Interested in the responses to these posts.

One would think the MAF should compensate for the slight increase given stock engine, no other mods. Curious if that change would impact idle timing with this throttle body.

MAF is airflow/ fueling, Timing is torque. The E92 ECM is torque based. If the idle airflow changes, then the reported torque will change and the ECM will alter timing to compensate.

I am not saying this will happen on Mamos ported 87. I am just saying be sure to check your idle timing after install to verify so you don't burn up your cat's because I have seen other TB's cause low idle timing.

I am in the process of dealing with this on a 2016 SS with another brands ported 95mm tb.

Edit* was pointed out that Brand "x" throttle body has a Notch in the bore and Mamos does not. So that might be the kicker for keeping the ECM from pulling timing. I know Prays ported 87's never had issues and they didn't have a notch in the bore.

[Junction65]

Originally Posted by KingLT1

MAF is airflow/ fueling, Timing is torque. The E92 ECM is torque based. If the idle airflow changes, then the reported torque will change and the ECM will alter timing to compensate.

I am not saying this will happen on Mamos ported 87. I am just saying be sure to check your idle timing after install to verify so you don't burn up your cat's because I have seen other TB's cause low idle timing.

I am in the process of dealing with this on a 2016 SS with another brands ported 95mm tb.

Edit* was pointed out that Brand "x" throttle body has a Notch in the bore and Mamos does not. So that might be the kicker for keeping the ECM from pulling timing. I know Prays ported 87's never had issues and they didn't have a notch in the bore.

Copy that, thanks for the additional clarification.

[Joshinator99]

Very small improvements in power can be made without a tune…and that’s it. Any real meaningful improvement in airflow will be dialed down by the ECM after a short time without a tune. If throttle responsiveness improves, that along with the small HP bump might be enough for many to consider the upgrade anyway.

I just run one the size of the Callahan Tunnel because race car.

EDIT: just saw King’s posts after I made mine. He’s right on the money (as usual)!

[clg82]

I have the Mamo Throttlebody V2 (currently for sale in the ZL1 classifieds) and I could definitely tell a difference in throttle response in my A10 and more power in the higher RPMs in the butt dyno test lol. Without a tune.

[2SS Capt]

Originally Posted by clg82

I have the Mamo Throttlebody V2 (currently for sale in the ZL1 classifieds) and I could definitely tell a difference in throttle response in my A10 and more power in the higher RPMs in the butt dyno test lol. Without a tune.

Just curious why you are selling it?

[Tony @ Mamo Motorsports]

Originally Posted by Junction65

Interested in the responses to these posts.

One would think the MAF should compensate for the slight increase given stock engine, no other mods. Curious if that change would impact idle timing with this throttle body.

Sorry Guys

Didn't realize this thread blew up a little. I have been selling these ported LT throttle bodys for 9 years....I have sold over a thousand units in that timeframe (every purchase is numbered).

I dont port the TB purposely in the area where the blade would be idling.....10% throttle angle flows the same air as stock.....its when you start moving past that where the gains in airflow really start moving (dramatically after 35%) and at that point your MAF senses additional air crossing its sensor and the ECM pulses your injectors a little longer to compensate.

Guys look at the OEM picture of this TB and for those of you who end up buying one compare what your removing to what I sent you.

This was a shelf stock item for GM at the time (installed on trucks) that was very inexpensive and for whatever reason got the nod to be installed on V8 performance cars. It's a crime it was even installed on new trucks because the design is horrendous. A TB from a 2007 LS3 is worlds better in out of the box trim.

It's all about cost and meeting a certain performance metric within that cost. I can't believe that the worst designed GM TB has had the longest product cycle.....11 years this year (2014 - 2025) and still going strong. From the aspect of sales I want to thank them but being a fan of GM products all my life it really kind of aggravates me at the same time.

Let me read some of these other comments.....I will be back here soon

Again guys....buy the TB....look at what your removing compared to what your installing....enjoy all the benefits I mentioned and your new found enjoyment in driving the car. If you don't feel it was worth the money send it back for a full refund but Im telling you that's not the direction this sale will go.

Don't overthink this....its the best bang for the buck going. No other mod that costs less than $500 will add this much fun factor to the car and Im giving you the opportunity to find that out for yourselves at zero financial risk.

I would like and appreciate if you could post back up in this thread when your happy though....honestly that's the best way you could thank me

-Tony

[2SS Capt]

Originally Posted by KingLT1

MAF is airflow/ fueling, Timing is torque. The E92 ECM is torque based. If the idle airflow changes, then the reported torque will change and the ECM will alter timing to compensate.

I am not saying this will happen on Mamos ported 87. I am just saying be sure to check your idle timing after install to verify so you don't burn up your cat's because I have seen other TB's cause low idle timing.

I am in the process of dealing with this on a 2016 SS with another brands ported 95mm tb.

Edit* was pointed out that Brand "x" throttle body has a Notch in the bore and Mamos does not. So that might be the kicker for keeping the ECM from pulling timing. I know Prays ported 87's never had issues and they didn't have a notch in the bore.

Thanks to KingLT1 for his updated comments, I "think" this is the area he is referring to that is allowing the idle to go too lean... Literally there is no way to cut off the air from that area...

Brand X allows an uncontrolled flow of air at idle, potentially leading to a possibly lean idle... And needing a tune to run properly (which is what KingLT1 was referring to...) I think the Tony Mamo TB which is "Stock" at the idle point will not have this issue...



No "notch" on the Tony Mamo TB, leaving idle exactly stock...

[tbair64]

Looks like a great bolt on mod. I wonder what the results would be adding the throttle body and a LT2 intake manifold to a stock LT1. both pieces seem to make significant improvements over stock. wonder how they would work together as a simple bolt on package?

[KingLT1]

Originally Posted by 2SS Capt

Thanks to KingLT1 for his updated comments, I "think" this is the area he is referring to that is allowing the idle to go too lean... Literally there is no way to cut off the air from that area...

Brand X allows an uncontrolled flow of air at idle, potentially leading to a possibly lean idle... And needing a tune to run properly (which is what KingLT1 was referring to...) I think the Tony Mamo TB which is "Stock" at the idle point will not have this issue...



No "notch" on the Tony Mamo TB, leaving idle exactly stock...

Just to clarify, It's not a lean or rich issue. It's an airflow and torque issue. Again, these ECM's are torque based on this platform. If something in the system changes to where it changes the airflow, then the torque will change, and the ECM will compensate with timing adjustment. Some throttle bodies have more idle airflow then stock, so the ECM pulls timing to get back to its programed torque range. The fix in this situation is to go into the VTT table and reduce torque in the idle area of the map and the ECM will raise timing. Low timing increases heat. Negative idle timing can make the headers glow red. That is what can potentially hurt cats. Again, it's not a lean issue because in closed loop the ECM will correct the AFR via fuel trims up to 30% to achieve stoich afr.