The thread about data logging has me wondering about the overall length of a CAI pipe and its ability to dissipate heat. Say if you had a JLT CAI, and cut the pipe on the left side so it's as short as possible with enough to still feed into the rubber elbow. Would there be any performance gain, or not even worth the experimentation?

 

Since your just thinking out loud:

If Im reading this right, isnt that extra part of the tube that goes in the OEM rubber to help clamp it down? If so...I wouldnt cut it, nor do I think it would make any difference.

That datalog thread has many people wondering...lol

 

I made my own reusing the elbow and filter from my JLT. My mass air meter is now 7 inches long with a 15ยบ lead in and exit. The filter is positioned on the meter so that there is a smooth transition from the curve on the inside of the filter (bell-mouth) and the inlet of the mass air meter. Also I have slid the mass air meter in to a 4inch ID piece of PVC that is only about 6 inches long and sealed with a rubber boot. With the 15ยบ exit there is no sharp step to cause turbulence on the ID the PVC pipe. The PVC pipe also has the same 15ยบ bevel in side of the rubber elbow. I also did not drill holes to retain the sensor in to the meter housing. I have made a metal strap set up that holds the sensor from the out side. I did this so as not have any projection in to the air path or have some thing come loose and go in to the engine. I am running the same DTP 93 tune as I had for the JLT but I have experienced some pinging. I believe this is due the better flow and I am running lean. My next mod will be an air splitter place in front of and behind the sensor to help the air get around the sensors base. Ill let you know how this turnes out.

 

Yikes, you guys are playing with fire here without the protection of a wideband. Meter placement and airflow means EVERYTHING to these setups these days. Also the diameter of the tubing and how close the MAF sensor is to a bend both before and after the sensor. If you're getting audiable detonation then that means the PCM is already pulling out 8 degree's of timing and it's still pinging, be careful!


Thanks, Doug.