Cobb vs UpRev

Denny McLain

Your very welcome.

More FYI....... Programming the fuel/air is also pretty tricky and not very straight forward. The fuel/air tables are pretty course with only about six rpm points so instead you recalibrate the MAF settings. Basically your tricking the computer into thinking it has less or more air going into the engine so it compensates. Reworking the MAF calibrations is complicated as you need to log the voltage and equate that into rpm.

Right now I'm thinking you do need to be a rocket scientists to program one of these things. So if the above lost ya..... you're probably never going to be sending a rocket to Mars so don't worry about it.

1slow370

target air fuel ratio is only a guide category at best. try to find the volumetric efficency maps or the MAF maps. Do you see any tables that mentions load or pressure?

I don't think I'm smarter than Uprev but maybe you should try doubting what people tell you sometimes espescially when they are trying to sell you something expensive. I wish we could get some input on here from uprev of a complete list of what can be done with it. Or maybe a trial version of the software just to go through it and see what it can do doesn't have to actually tune the car I just want to see the different tables and options it has. I have already watched all there video's about it.

Denny McLain

You're kidding right? Do you realize how many people have hooted on me for calling out the manufacturers on their claims? For only trusting independent objective empirical information from people with no financial interest?

What it amounts to is when the car was on the dyno, I saw room for improvement and basically fuel/air is the first place to start. That the Cobb does do only you really need to be knowledgeable in how basic tuning works and how their software works. It was free dyno time and the thing is not an arm n an leg. As mentioned, Handy Gadget.

Called Calvin whom does the Cobb tuning in Plano yesterday, they appear to be stand up people in every manner and so far have not made any outrageous claims to my knowledge. He and I both are completely in the dark as to why the car is pulling out timing in the midrange and told me to reset the ECU, drive the car and log what the timing is doing. If that didn't work, it was another dyno session to get a better handle on the car.

My impression is the ECU are strange birds to deal with for everyone.

Anyway.....This is what the Cobb currently does:

Fuel Tables
• Intake Calibration
o MAF A and B
• Base Fuel Schedule Modifier (Beta)
• Fuel Multiplier
• Injector Latency A and B
• Injector Latency Multiplier and Offset
• Injector Scalar A and B
• Primary Fuel (8 points)

Ignition Tables
• Ignition Hi Det
• Knock overlay Hi Det
• Knock overlay primary A and B
• Primary Ignition A and B
Limits
• Rev Limit - Fuel Cut (2)
• Rev Limit Throttle
• Rev Limit -Limp Home
• Speed limit A-C
• Speed Limit Hysteresis

Misc Tables
• Idle Table A-E

Throttle Tables
• Throttle 1-8

To be candid about half of it is Greek to me and I'm going to take the car/software to a couple of buddies whom tune full time for help.