Just wanted to post that I have the Hahn CoolRam installed and dialed in. Took some MAF calibration to get it dialed in but it runs the best of any intake I've tried. Been through the Dejon SRI, K&N filter w/airbox mod, & AEM CAI before this.

Saw 35 Lb/min flow in 3rd gear along with 30 lb/min VE airflow at ~ 21 PSI boost near redline.

No more cold idle surging and runs very smooth. LTFT's dialed in at WOT to 0.0

DFCO lurch is gone as well.

Anyone that is interested in my AEM intake and silicone elbow, PM me. See sig.

 

LOL make me a deal...

 

For you...$250.

 

pm sent

 

PM read.... I'm not willing to split it up into parts just yet.

 

How do you like the breather connection on the Hahn?

 

did you do any airflow with the aem

 

I think they modified it since the original design because I have no issues with it. The connection is flanged for the stock breather connection to latch onto. So far, so good.

The info on the Hahn site says it's the stock MAF location, but I had to redo the wire loom a bit to get the connector back on. I suppose I could have just pulled it over to connect it, but that would have been straining the wiring too much for my taste.

I logged 34 lb/min MAF and 29 VE lb/min with it in the past but the temps were warmer outside then also and I was running less aggressive intake cam tables.

 

You have a different intake that I had, It was a PITA to get the flow right on my hahn CAI

 

I never said it was easy, I had an idea of how to trim the MAF tables after the AEM, but it still took a lot of time to dial it in.

15% up top, 11% midrange and around 8 at idle once I got rid of the stock correction table offsets.

 

Would be kinda neat if we could run the 3"- 3.5" LSx MAF's. Still have to dial those in, but seem a LOT less touchy. Not seen any datasheets on the Bosch MAF yet to see what all that might involve on either building a converter or if they're electrically compatible.

Might be a good winter project if the service manuals will ever become available

 

I dont know about that. Your LTFTs and STFTs as well as the commanded A/F vs the actual A/F as measured by the factory wideband were within 1%. That is dead on compared to all the other intakes I have logged.

 

I don't know if the LSx's are frequency MAF's or not. Conversion may be possible. The small air passage on our MAF's make placement very critical. THe Hahn has it in the straightest part of the intake, from a turbulence aspect, that's the best, but the flow curve is definetly way different than stock. I'll be happy to sell a base tune to anyone that wants one.

 

I think if GM had put a screen in the MAF in the first place we would not have so many issues with turbulance in the intake tract. Even if the intake diameter is the same as stock the airflow is not read correctly because of turbulance. I have taken the airflter out of mine just to see the effect and the LTFT went from -1 to -9 when I took the filter out on an otherwise stock intake. That tells me that it is more an issue of turbulance more than anything.

 

^^^^

Which might explain why AEM put the sensor in the worst place from a laminar flow standpoint. Right after the intake filter.

 

Maybe.

 

Shameless pic...

 

LOL...looks nice!

Dammit...

 

It'd look better polished, but no luck there. I likes shiny stuff.

35 MAF lb/min flow again today in 2nd & 3rd. No KR in 3rd to redline @ 17*. (once anyway)