With a mass airflow system, the computer will retune the car itself with performance mods. Our motors air speed density (surprizingly old school techno) and performance gains from aftermarket parts will give increases, but before and after dynoes done on the same day will probably offer no performance gains, as seen by testing several CAI back to back and seeing no results on the dyno. Speed density works off of baseline preprograms, and are slow to adjust to changes. Just like when I used to do performance mods on my 88 mustang, which was the last year mustangs used speed density, it was limited to how much you can add power before the computer could not compensate any more, and results from cai, catback, headers was about the limit, and it would take an honest week of driving for the car to compensate. I have done a few dynoes in the past to show the differences. About 25 to 35 hp was the limit on a stock computer.
Custom done chips were the norm, and required to do any real modifications on those systems. For 89 and above, MAF was the ford way to go, and could handle all modificaitions done, up to 398hp on the computer, before custom tunning was done. This was a big selling point for the mustang, cause they were at the time easier to mod and get good gains then the main competition could offer(CHEVY). I have dynoed my car and saw 300 hp at the rears with just a cai, and catback, and Jet chip, my car feels faster from me and every friend that has driven it, especially after the chip! I see stock dynoes in the 260 to 270hp range, so either I got a good motor, or my mods made a difference.
I was surprized to see that no comments were made about the speed density before when they did that back to back CAI tests with like 6 systems. Just like Jet has a chip for stock, then a stage 2 chip for CAI, and Catback mods. Custom tuning or chips are absolutely going to be the required solution for our cars in the future, if Chrysler does not choose to use MAF again. Look at all the supercharger companies that have given a pass on the new Hemi, cause they really needed a company that could crack the computer and work with the old style of speed density programming to keep from blowing up the motors. This is why GSmotorsports is the only supercharger company to offer this, they have been working on chrysler trucks and cars for years and is probably the only company that has the skill to do the required computer tunning, hell even in Hot Rod magazine this month on page 138, they stated that Paxton gave up and handed the project over to GS, to see if they could crack the programming problem, with a exclusivity claim if they could.
Our cars will be limited to what can be done before the computer will trip and start dropping codes, cause there is only a small parameter in there to allow for variations of motors, climates, altitudes, that all these different cars will have to work through. You guys know they test the hell out of products, and drive in all different environments to get the cars to run great out the box, but they always leave room for improvements, it's just that we are limited in our mods without tunning for each application. It is almost like a step back for Chrysler to choose to use this older system, compared to MAF that has been out for 20 years in common use.
So don't fret, buy your mods, you will get gains, maybe not as much as you would like, and maybe not immediate, but there will be gains.
More effecient, IS more effecient!
I use my Wrangler Jeep to compare cause this is a speed density system also, and I have run into the same questions from that crowd. There are a lot of mods out there for the 4.0 motor, but a lot of people complain that there is little gain with the modifications, and a lot of guys trip the computer when they move to headers. If you research wrangler modifications you will see a lot of package deals, like intake, throttle body and new computer! These guys are getting great gains from just an intake and larger throttle body, cause it comes with reprogrammed parameters for the new performance parts. Kind of expensive but pretty much necesarry!
Contacting and talking to tech support from Jet, they are going to make a hand held programmer for our cars also, that will ask what mods you have done for the best programms for your vehicle. Headers will require the Jet Stage 3 chip, if you do not want the ability to program the tranny and play with the torque managment. This pretty much all leads to just longer times for performance mods, but with such a strong package like our cars, we will see plenty of mods to come and go for our cars!
Custom done chips were the norm, and required to do any real modifications on those systems. For 89 and above, MAF was the ford way to go, and could handle all modificaitions done, up to 398hp on the computer, before custom tunning was done. This was a big selling point for the mustang, cause they were at the time easier to mod and get good gains then the main competition could offer(CHEVY). I have dynoed my car and saw 300 hp at the rears with just a cai, and catback, and Jet chip, my car feels faster from me and every friend that has driven it, especially after the chip! I see stock dynoes in the 260 to 270hp range, so either I got a good motor, or my mods made a difference.
I was surprized to see that no comments were made about the speed density before when they did that back to back CAI tests with like 6 systems. Just like Jet has a chip for stock, then a stage 2 chip for CAI, and Catback mods. Custom tuning or chips are absolutely going to be the required solution for our cars in the future, if Chrysler does not choose to use MAF again. Look at all the supercharger companies that have given a pass on the new Hemi, cause they really needed a company that could crack the computer and work with the old style of speed density programming to keep from blowing up the motors. This is why GSmotorsports is the only supercharger company to offer this, they have been working on chrysler trucks and cars for years and is probably the only company that has the skill to do the required computer tunning, hell even in Hot Rod magazine this month on page 138, they stated that Paxton gave up and handed the project over to GS, to see if they could crack the programming problem, with a exclusivity claim if they could.
Our cars will be limited to what can be done before the computer will trip and start dropping codes, cause there is only a small parameter in there to allow for variations of motors, climates, altitudes, that all these different cars will have to work through. You guys know they test the hell out of products, and drive in all different environments to get the cars to run great out the box, but they always leave room for improvements, it's just that we are limited in our mods without tunning for each application. It is almost like a step back for Chrysler to choose to use this older system, compared to MAF that has been out for 20 years in common use.
So don't fret, buy your mods, you will get gains, maybe not as much as you would like, and maybe not immediate, but there will be gains.
More effecient, IS more effecient!
I use my Wrangler Jeep to compare cause this is a speed density system also, and I have run into the same questions from that crowd. There are a lot of mods out there for the 4.0 motor, but a lot of people complain that there is little gain with the modifications, and a lot of guys trip the computer when they move to headers. If you research wrangler modifications you will see a lot of package deals, like intake, throttle body and new computer! These guys are getting great gains from just an intake and larger throttle body, cause it comes with reprogrammed parameters for the new performance parts. Kind of expensive but pretty much necesarry!
Contacting and talking to tech support from Jet, they are going to make a hand held programmer for our cars also, that will ask what mods you have done for the best programms for your vehicle. Headers will require the Jet Stage 3 chip, if you do not want the ability to program the tranny and play with the torque managment. This pretty much all leads to just longer times for performance mods, but with such a strong package like our cars, we will see plenty of mods to come and go for our cars!
