MAF and VVE Blended Problem

[bad383ta]

I have a 2012 Camaro SS with Cam and Magnuson Supercharger. On the dyno running the car in just Maf is pulls Great with a nice level AFR in the mid 11's. If I disable MAF and run the car in Speed Density it pulls great and has a nice level AFR in the mid 11's. It has been tuned on both and each runs great. If I enable the Maf and Speed Density at the same time for a blended combination it goes so lean on the dyno that it pops and dies or just breaks up. Each on their own are perfect, together they can't make a pull. What is going on?

Bad383TA

[PGA2B]

Gonna need to post the tune to get help.

[Josue Galban]

I have a 2012 Camaro SS with Cam and Magnuson Supercharger. On the dyno running the car in just Maf is pulls Great with a nice level AFR in the mid 11's. If I disable MAF and run the car in Speed Density it pulls great and has a nice level AFR in the mid 11's. It has been tuned on both and each runs great. If I enable the Maf and Speed Density at the same time for a blended combination it goes so lean on the dyno that it pops and dies or just breaks up. Each on their own are perfect, together they can't make a pull. What is going on?

Bad383TA

well let's say that the correct way is to leave both working correctly, I feel that perhaps you should work only with speed density VVE will be much more constant than with the MAF now in case you want to put both to work if both are well calibrated it should not there shouldn't be any problem let alone break you can try it maybe you want to run a little safer with your PE and then progressively place it to the point you want be very careful you could break your engine if you don't do it right

[Josue Galban]

I have a 2012 Camaro SS with Cam and Magnuson Supercharger. On the dyno running the car in just Maf is pulls Great with a nice level AFR in the mid 11's. If I disable MAF and run the car in Speed Density it pulls great and has a nice level AFR in the mid 11's. It has been tuned on both and each runs great. If I enable the Maf and Speed Density at the same time for a blended combination it goes so lean on the dyno that it pops and dies or just breaks up. Each on their own are perfect, together they can't make a pull. What is going on?

Bad383TA

pass a datalog and your tuning may be something is not right

[Alvin]

Post a log at least.. Something else has to be going on.

[wildfan1976]

Zero out all of your prediction coefficients. I had this same problem on my G8 with a Lsa. Took care of my same issue when running in blended.

[lsxjunkie]

Zero out VE coefficient?

Zero out all of your prediction coefficients. I had this same problem on my G8 with a Lsa. Took care of my same issue when running in blended.

[wildfan1976]

Yes

[Josue Galban]

Zero out VE coefficient?

yes

[wildfan1976]

Not VE coefficient. Prediction Coefficient under Dynamic. They are different.