MMR Intake - No Need for Reflash?
Cobra Member
Joined: November 13, 2004
Posts: 1,431
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Originally posted by Kluski@January 13, 2005, 3:39 PM
Since I am still not sure...
Does this mean (basically) any kit will not require a tune. However, you will only gain the minimal benefits unless you tune.
Since I am still not sure...
Does this mean (basically) any kit will not require a tune. However, you will only gain the minimal benefits unless you tune.
-Bryan
Mach 1 Member
Joined: September 21, 2004
Posts: 681
Likes: 0
Originally posted by Mod Mustang Racing@January 13, 2005, 3:15 PM
Hey guys, sorry we didnt get on here sooner to help people understand the benifits and requirements of our kit. First of all none of our customers have made anything less than about 5 flywheel horsepower with our kit (again with no custom tune). Our average customer pics up about 8rwhp with no tune and we have seen as much as 15rwhp with no tune. We realize that some people have made less HP and of course some have made more, this is the age old argument with different vehicles and different dyno's. The check engine light issue is our biggest concern and this of course may require a custom tune on some vehicles to turn off, the vehicle has simply detected the increase of air flow and it is beyond the pre programed parameters. It is in no way harming the vehicle and should be no cause for concern and in fact as mentioned in our instructions most vehicles calibrate to this and turn off the light shortly thereafter. Are the custom tunes worth it, definitely, many of our customers have picked up 10-15 additional HP with our kit and the custom tune for it, is it required? No. But the gains on average are smaller.
Please feel free to give us a call if you have any questions.
MMR TECH
805 983 8599
Hey guys, sorry we didnt get on here sooner to help people understand the benifits and requirements of our kit. First of all none of our customers have made anything less than about 5 flywheel horsepower with our kit (again with no custom tune). Our average customer pics up about 8rwhp with no tune and we have seen as much as 15rwhp with no tune. We realize that some people have made less HP and of course some have made more, this is the age old argument with different vehicles and different dyno's. The check engine light issue is our biggest concern and this of course may require a custom tune on some vehicles to turn off, the vehicle has simply detected the increase of air flow and it is beyond the pre programed parameters. It is in no way harming the vehicle and should be no cause for concern and in fact as mentioned in our instructions most vehicles calibrate to this and turn off the light shortly thereafter. Are the custom tunes worth it, definitely, many of our customers have picked up 10-15 additional HP with our kit and the custom tune for it, is it required? No. But the gains on average are smaller.
Please feel free to give us a call if you have any questions.
MMR TECH
805 983 8599
Since I am in the market for a CAI, I appreciate your coming on this forum and providing some info. But, before I purchase your system I would like to take you up on your offer to answer some more questions.
1. What is the specific error code (name and number) that is turning on the Check Engine light?
2. Under what operating conditions is the code generated?
3. What is the specific sensor (name and ref. number) that is generating the error code?
4. What is the actual highest air flow measurement you have seen?
5. What is the specific pre-programed limit of the air flow?
6. What is the a/f ratio when you are at that high air flow?
7. What is the a/f ratio during the "calibration" period of time.
8. What is the a/f ratio after the computer "calibrates" itself?
9. What specific parameter limit or table is the computer changing when it "calibrates" itself?
10. What is the new value or limit of the parameter after the computer "calibrates" itself?
11. What is the maximum value that the computer can change the limit to?
Thank you for your help in resolving my questions.
The Boss Hog
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Joined: November 27, 2004
Posts: 1,303
Likes: 2
From: Albuquerque, New Mexico
If I recall, the problem with the MAF is it's design. It does NOT measure 100% of the air coming into the engine, only the portion that goes through that small bypass section (aka: the sensor peice that is move from the stock setup to the CAIs). The car computer is calibrated based on the factory desigh to know that if X air is flowing through the bypass, the Y is the total airflow through the intake system.
When we make drastic changes to intake system to get better airflow, we upset this calibration. If the computer is able to determine that more air is actually going into the engine than the MAF says is going in (via the O2 sensor in the exhaust), then it lights up the check engine because it thinks something is screwed up.
I would guess that very careful design could maintain a fairly close balance between between the air intake and the bypass. But I would assume that tweaking the airflow table would be easier.
So, can anyone confirm or deny this is how it works? I am fairly sure this is how it works, but I am not 100% sure and would like to have it validated. Or shot down if I am wrong!
When we make drastic changes to intake system to get better airflow, we upset this calibration. If the computer is able to determine that more air is actually going into the engine than the MAF says is going in (via the O2 sensor in the exhaust), then it lights up the check engine because it thinks something is screwed up.
I would guess that very careful design could maintain a fairly close balance between between the air intake and the bypass. But I would assume that tweaking the airflow table would be easier.
So, can anyone confirm or deny this is how it works? I am fairly sure this is how it works, but I am not 100% sure and would like to have it validated. Or shot down if I am wrong!
Mach 1 Member
Joined: September 21, 2004
Posts: 681
Likes: 0
RRRoamer,
Right now, your explination is as good as any. I really don't know what is causing the problem. My point in asking all those questions was this; In my opinion, the manuafacturer, who did the R&D on the product, should know the specific answers to those questions. If he does not, how in the world can he make the following statement:
The Boss Hog . . . . . . 
Right now, your explination is as good as any. I really don't know what is causing the problem. My point in asking all those questions was this; In my opinion, the manuafacturer, who did the R&D on the product, should know the specific answers to those questions. If he does not, how in the world can he make the following statement:
Originally posted by Mod Mustang Racing@January 13, 2005, 3:15 PM
It is in no way harming the vehicle and should be no cause for concern and ...
It is in no way harming the vehicle and should be no cause for concern and ...
Mach 1 Member
Joined: October 14, 2004
Posts: 521
Likes: 0
Originally posted by Mod Mustang Racing@January 13, 2005, 1:15 PM
Hey guys, sorry we didnt get on here sooner to help people understand the benifits and requirements of our kit. First of all none of our customers have made anything less than about 5 flywheel horsepower with our kit (again with no custom tune). Our average customer pics up about 8rwhp with no tune and we have seen as much as 15rwhp with no tune. We realize that some people have made less HP and of course some have made more, this is the age old argument with different vehicles and different dyno's. The check engine light issue is our biggest concern and this of course may require a custom tune on some vehicles to turn off, the vehicle has simply detected the increase of air flow and it is beyond the pre programed parameters. It is in no way harming the vehicle and should be no cause for concern and in fact as mentioned in our instructions most vehicles calibrate to this and turn off the light shortly thereafter. Are the custom tunes worth it, definitely, many of our customers have picked up 10-15 additional HP with our kit and the custom tune for it, is it required? No. But the gains on average are smaller.
Please feel free to give us a call if you have any questions.
MMR TECH
805 983 8599
Hey guys, sorry we didnt get on here sooner to help people understand the benifits and requirements of our kit. First of all none of our customers have made anything less than about 5 flywheel horsepower with our kit (again with no custom tune). Our average customer pics up about 8rwhp with no tune and we have seen as much as 15rwhp with no tune. We realize that some people have made less HP and of course some have made more, this is the age old argument with different vehicles and different dyno's. The check engine light issue is our biggest concern and this of course may require a custom tune on some vehicles to turn off, the vehicle has simply detected the increase of air flow and it is beyond the pre programed parameters. It is in no way harming the vehicle and should be no cause for concern and in fact as mentioned in our instructions most vehicles calibrate to this and turn off the light shortly thereafter. Are the custom tunes worth it, definitely, many of our customers have picked up 10-15 additional HP with our kit and the custom tune for it, is it required? No. But the gains on average are smaller.
Please feel free to give us a call if you have any questions.
MMR TECH
805 983 8599
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