U7137 need a CAI performance tune

redstared · Post by **redstared** » Mon Mar 14, 2011 7:23 pm

I have a Ram 1500 with a Specter CAI and a single side Dynomax Exhaust system. The stock performance tune has a bad flat spot at about 1500 RPM's. I have seen several posts about CAI performance tunes. My Predator does not seem to have those tunes. Was it supposed to? What modifications can I make myself to account for my changes? Do I just need to increase the fuel percentages?

Thanks

Mike_Levy · Post by **Mike_Levy** » Mon Mar 14, 2011 7:42 pm

The Rams do not lean out with a CAI. No CAI tunes are required.

redstared · Post by **redstared** » Mon Mar 14, 2011 8:05 pm

It actually ran like it was lean when I first put the CAI on. It then ran great when I got the Predator and put the performance tune on. Now it runs like it did before I got the Predator after installing the exhaust. Something has to be off. Especially at 1500 RPM's.

redstared · Post by **redstared** » Wed Mar 16, 2011 8:39 am

Well, adding more fuel has not helped. I think it made it worse. I noticed that my gas mileage has also dropped. Even on the default performance setting. before adding the pipes it was 14.3, now it is 12.7. I would love some help with this please.

ggaliano · Post by **ggaliano** » Wed Mar 16, 2011 10:46 am

Try to even out fuel ratio to 14.7-1(remember fuel is hardly the issue and makes enough power at normal settings, its always the AF\Ratio that kills power) and advance timing a couple degrees in the 1500 to 4000 rpm range at WOT, also you might need a little more Back-pressure, you might want to try some reso's on that dynomax system.

redstared · Post by **redstared** » Wed Mar 16, 2011 12:03 pm

Thank you for the reply. To figure out the ratio it is running,it that the desired fuel ratio log? To get it higher or lower, what needs to be adjusted? Also can you recommend a good resonator? Not too expensive, but that should work.

Thanks again!

redstared · Post by **redstared** » Thu Mar 17, 2011 10:11 am

OK, I ordered a resonator tip for the pipes to try to get a little more back pressure. I adjusted the WOT Spark timing a couple of degrees and put the fuel back. It seems better for sure. Still less powerful under 3000 RPMs than before the pipes. I really hope the resonator helps here.

My question is how to I get the Fuel to gas ratio to 14.7 to 1?

FAhemiST · Post by **FAhemiST** » Thu Mar 17, 2011 12:34 pm

dont go adjusting fuel or spark without a wideband o2 sensor and datalogging. blind leading the blind here

U7137 need a CAI performance tune

U7137 need a CAI performance tune

RE: U7137 need a CAI performance tune

RE: U7137 need a CAI performance tune