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Yes, IAT is at the filter and MAT is internal to the system at the spider/Y-pipe.
I am 99% sure Forscan has MAT, but don't know about a CTS.
Yes I’m pretty sure you’re correct. Only problem with me running forscan would be I’d lose my pyrometer as it’s on the CTS. Not sure why the CTS doesn’t have an option for all channels. Maybe I need to connect the laptop again to look for updates.
For what its worth,
this is an ais with ais monitor with about 10,000 miles on it, stock 2003 tunes and stock turbo, bellowed up pipes wastegate plugged and straight piped stock exhaust What 23-24 psi does
The FM measures vacuum. It doesn’t change calibration with different filter.
Yes but my thought was different FMs based on the box. The AIS version definitely pulls in with less vacuum which I believe was already an established fact. My thinking is the AIS version is a different part number and pulls easier....calibrated for the AIS system rather than the original. Which would mean the AIS flows with less restriction when new and sets the FM as needing a filter change at a lower restriction.
Cant explain your SOTP’s experience because I wasn’t wearing your pants... lol.
Ha!!!
Im gonna say the worst thing extra restriction would do is raise EGT and reduce power and MPG. Not dangerous if monitoring EGT, right??
Yes I would think so except maybe for your pulling oil through the CCV report, which I don’t need to be concerned with right now.
That was part of the weird thing though. It appears the EGT was actually lower with the AIS. Maybe it was an illusion.
I took a short trip this evening to pick up a 12’ utility trailer. About 6 miles round trip to my uncle’s place. Running 65 Daily tune both ways. I went about 3/4 throttle once while crossing the 4 lane road with the empty trailer. The FM looked like this.
So unless I forgot to reset it last night when I got home (totally possible) this AIS is not going to keep up.
Currently debating on whether to make my 3 hour round trip tomorrow to pick something up with the AIS or pull it before the trip.
EDIT: Removed the photo and did the strike through because I realized the FM had not been reset before this short trip I mentioned.
PS, did the trip with the AIS and it performed well.
Why not modify the AIS like some have done? And see if that helps with the breathing? It does look clean with the AIS I like it.
That would be nice to try but if I’m ultimately going to sell it I would prefer to keep it complete. It’s almost new. I doubt a buyer would be as interested if I hacked it up.
I’ve also always liked the clean look of the AIS. But I did order the black RDP cover for the Donaldson so it will look ok too.
On the short drove tonight it was very obviously whisper quiet, not that the 6637 is noisy but this does push it to extreme quiet for intake and turbo sound. As I was basically idling our our backroad all I could hear was the injectors. When I’m at cruise speed mainly all you can hear with either filter is the 4” exhaust tone.
I’ll probably leave the AIS for my trip tomorrow but take some tools and parts to make a change if needed. As SSJ said I don’t see any real adverse effects of just running it for now.
For what it is worth, the modified AIS was the very first take off part I sold from my truck when I installed the T4 kit. If you use a hole saw, then there is no "hacking" up going on. In addition, the hole you are creating in the AIS is under the edge/lip of the fender and you cannot see it even with a bright light.
I bought the foam cone to fit between the AIS and fender and that was a $30 POS. I should have just gotten a shop vac pre-filter like the fellas here told me to do.
Even with the cone on there, you could just barely see the cone between the AIS and fender.
There is a hole in the fender which apparently is there to promote air flow to the filter instead of just through the snorkel. My uneducated and biased opinion though is that the additional hole will not make much difference in the readings on the FM.
I agree Sous in I don’t think modifying would net a lot of change. At least probably not enough to allow keeping the AIS.
I may speak to my co-worker again and ask if he would still be willing to purchase if I modded it.
I want to throw this fact on here too just so I have it on record for later.
When running 60mph, 1750rpm, flat ground I was seeing 2.5psi with the AIS.
IIRC at 55mph it was showing no boost reading on the gauge.
I still feel like it’s more responsive with the AIS and it’s driving me crazy that I can’t explain it.
Oh and I know the FM is not the most scientific way to check but it allows for a fairly easy comparison between the restriction/vacuum on the system from the filters.
Now if we could also investigate the impact from airflow turbulence and heat......
To be clear I’m not overly concerned about the FM itself. Just using it as a tool to compare the systems.
Monitor IAT temp with the sensor in the AIS. Then compare that to IAT when you have the sensor out of the box for 6637.
Yes good point. I’ve done this before but can’t remember the numbers. I know the AIS runs very close to ambient. And like folks have stated before I believe the 6637 was within about 10* of ambient once up to speed. I’ll doublecheck when the 6637 is back in.
Yes good point. I’ve done this before but can’t remember the numbers. I know the AIS runs very close to ambient. And like folks have stated before I believe the 6637 was within about 10* of ambient once up to speed. I’ll doublecheck when the 6637 is back in.
