I must admit, the real reason I consider an intake is for sound. I also enjoy the look of pretty plumbing.
Modding is fine. The problems ensue when the airflow across the MAF sensor is altered by different shapes and sizes of piping.
__________________
Bill Hahn Jr., Hahn RaceCraft, Inc. Home of the World's Quickest and Most Powerful Solstices
First to the 14's, 13's, and 12's in the 1/4 Mile
12.00 @ 117 MPH Street Solstice World Record
Hahn RaceCraft, Inc.
Turbocharging GM's since 1988 http://www.turbosystem.com
Modding is fine. The problems ensue when the airflow across the MAF sensor is altered by different shapes and sizes of piping.
Hence the GMPP intake having the MAF sensor relocated to the front near the filter where the inner pipe diameter is the same as it is on the stock aiorbox where the MAF sensor sits. Now it makes sense.
I really should have asked, Did you bother with a modded box on your car?
I understand that odd flow dynamics and maf sensor housing diameter and placement is critical.
Frankly, at stock or near-stock power levels, there's not much to be had here.
But as we approach or exceed the 300HP mark, there's a stronger case to mod the stock box.
Usually, removing the silencer assembly and adding a K&N is all we do. Inexpensive, easy, effective!
__________________
Bill Hahn Jr., Hahn RaceCraft, Inc. Home of the World's Quickest and Most Powerful Solstices
First to the 14's, 13's, and 12's in the 1/4 Mile
12.00 @ 117 MPH Street Solstice World Record
Hahn RaceCraft, Inc.
Turbocharging GM's since 1988 http://www.turbosystem.com
Location: The avatar shows my motivation to work .... Work takes place in Houston, Republic of Texas .... Motivation takes place in CA, NV, UT, CO and similar locations.
I never noticed any problems with my Kappasphere CAI, which is Fujita. The noise was fine for a single man, but it's somewhat bothersome to my new co-pilot Sandra, so my mechanic has reinstalled the stock airbox with some custom modifications. I'll pick up MariSOL tomorrow and report back any observations I might have regarding the change.
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Her name is MariSOL
VIN 6Y101319, delivered 10/15/05. 71,923 miles.
It seems you can mod the begeebers out of the stock airbox,and they still remain quiet. I have cut up 2 of them quite a bit,and you still dont hear the noise of an aftermarket one.
It seems you can mod the begeebers out of the stock airbox,and they still remain quiet. I have cut up 2 of them quite a bit,and you still dont hear the noise of an aftermarket one.
__________________
Bill Hahn Jr., Hahn RaceCraft, Inc. Home of the World's Quickest and Most Powerful Solstices
First to the 14's, 13's, and 12's in the 1/4 Mile
12.00 @ 117 MPH Street Solstice World Record
Hahn RaceCraft, Inc.
Turbocharging GM's since 1988 http://www.turbosystem.com
You also can use HPtuners and "this sweet trick I like to call Math" (-Dilbert,lol) and use that element in whatever size pipe you'd like (within reason, you want the tonsil in the center(ish))
The main reason for discrepency in signal vs flow when in an aftermarket intake is than it is deep inside the pipe. If you look at the airboxes/intakes from the factory they are all a small distance from the opening to the plenum. If you looked at it on a flow bench or in CFD you'd notice that it has been placed directy in the vena constricta.
Im guessing they are using it to amplify flow range and accuracy.
Fujita made up for this by speeding up the airflow over the element to simulate the stock flow/V curve. It works but likely would reveal a restiction somwhere far beyond the stock turbo.
I have mine force fed inside a 3" pipe without any issues relating to MAF. I just calculated the difference in area and applied it the the MAF table. Then used LTFT's to trim it out.
The Tial BOV is roughly 18" in front of it in the nose of the car. I have grown to really like the external. Someday the non-flow reversal & ability to dump it all in 0.2sec will PUNISH the rearend. lol
Sometimes it will gimme a little pop out the exhaust when I speedshift.
My point is you can use that tonsil in anything from 2.75" to 4". Suck through or blow thru. Ive done it on our cars. ALL modifications should include a trimming of the MAF transfer table Via scannin'.
Want a steel slug for the MAF tonsil to try it? any pipe size you want $25. Mig it on. Give it a try.
Last edited by BaldTurboFreak : 06-02-2008 at 01:59 PM.
You also can use HPtuners and "this sweet trick I like to call Math" (-Dilbert,lol) and use that element in whatever size pipe you'd like (within reason, you want the tonsil in the center(ish))
The main reason for discrepency in signal vs flow when in an aftermarket intake is than it is deep inside the pipe. If you look at the airboxes/intakes from the factory they are all a small distance from the opening to the plenum. If you looked at it on a flow bench or in CFD you'd notice that it has been placed directy in the vena constricta.
Im guessing they are using it to amplify flow range and accuracy.
Fujita made up for this by speeding up the airflow over the element to simulate the stock flow/V curve. It works but likely would reveal a restiction somwhere far beyond the stock turbo.
I have mine force fed inside a 3" pipe without any issues relating to MAF. I just calculated the difference in area and applied it the the MAF table. Then used LTFT's to trim it out.
The Tial BOV is roughly 18" in front of it in the nose of the car. I have grown to really like the external. Someday the non-flow reversal & ability to dump it all in 0.2sec will PUNISH the rearend. lol
Sometimes it will gimme a little pop out the exhaust when I speedshift.
My point is you can use that tonsil in anything from 2.75" to 4". Suck through or blow thru. Ive done it on our cars. ALL modifications should include a trimming of the MAF transfer table Via scannin'.
Want a steel slug for the MAF tonsil to try it? any pipe size you want $25. Mig it on. Give it a try.
To take it one step further, the LTFT will bounce around a bit depending on the cell your driving habit puts you in and that can vary from day to day. To get the LTFT into a tighter range, you will have to also modify the the MAF table based on STFT. I am basing this on my Fujita CAI. In addition, I believe it is always best to adjust the WOT cells separately and do not apply any generals adjustment to those cells when tuning for partial throttle operation.
Linear Mode
