tdiddy's turbo thread
#426
Tailgaters beware
#429
Finally Boosted!!!!!!!
Thread Starter
OK, after researching for about 8 hours I think I am going to need switch to Speed Density (MAP) using the Interceptor-X. At least for the time being. The reason for this is mainly my intake setup. The transition from the 3" CAI tube to 3.5" MAF tube and the 90 degree transition from the MAF tube to the turbo inlet are really screwing with my MAF sensor readings.
Things I could try:
1. I could possibly install a velocity stack before the MAF tube. However, I can't really find one that is 3.5" and I would have to loose the CAI.
2. I could install an air straightener before the MAF tube. There are multiple types but I can't find anywhere to buy many of them. The easiest to install would be a mesh screen. I already tried nylon door screen and it didn't work. I have some Stainless Wire Mesh but I don't think this is going to straighten out the airflow enuff to promote laminar flow at all load points. I really need some sort of a honeycomb air straightener but don't know where to buy one.
3. I could install an air straightener after the MAF tube. See #2.
4. I could lengthen the MAF tube to be 8" instead of 6". I plan to try this regardless.
Maybe Cobb will release a short ram intake that is 3.5" for the RX8 similar to THIS one for the Mazdaspeed 3. (hint, hint)
Anyway, I think I am going to switch to the Interceptor for now while I try to get the MAF situation worked out. I have too much time and money wrapped up in the car to just let it sit while I try to work out these issues.
Thanks for everyones suggestions!
Things I could try:
1. I could possibly install a velocity stack before the MAF tube. However, I can't really find one that is 3.5" and I would have to loose the CAI.
2. I could install an air straightener before the MAF tube. There are multiple types but I can't find anywhere to buy many of them. The easiest to install would be a mesh screen. I already tried nylon door screen and it didn't work. I have some Stainless Wire Mesh but I don't think this is going to straighten out the airflow enuff to promote laminar flow at all load points. I really need some sort of a honeycomb air straightener but don't know where to buy one.
3. I could install an air straightener after the MAF tube. See #2.
4. I could lengthen the MAF tube to be 8" instead of 6". I plan to try this regardless.
Maybe Cobb will release a short ram intake that is 3.5" for the RX8 similar to THIS one for the Mazdaspeed 3. (hint, hint)
Anyway, I think I am going to switch to the Interceptor for now while I try to get the MAF situation worked out. I have too much time and money wrapped up in the car to just let it sit while I try to work out these issues.
Thanks for everyones suggestions!
#430
The Professor
It would probably work if you put the MAF on the other side of the engine bay in the CAI. Would require that you cut the maf harness to extend it though.
Most of the turbulence is coming from swirl from behind the MAF so you should use more screens 2-3 behind the MAF setup. One fine one directly on the turbo opening and a slightly larger one on the end of the MAF tube.
Most of the turbulence is coming from swirl from behind the MAF so you should use more screens 2-3 behind the MAF setup. One fine one directly on the turbo opening and a slightly larger one on the end of the MAF tube.
Last edited by staticlag; 04-23-2008 at 12:43 PM.
#433
Rotary , eh?
iTrader: (1)
I think ideally I would probably put it on the other side of the front bulkhead directly between the bend that comes out of the IC and the bend that goes into the engine bay.
If this is completely out of the question I would put it as far forward from it's current location as possible.
If this is completely out of the question I would put it as far forward from it's current location as possible.
#444
Boosted Kiwi
iTrader: (2)
looks to me like you could move the maf 3-4 inches further away from turbo without taking it or the transition outside the engine bay ...
Last edited by Brettus; 04-23-2008 at 03:47 PM.
#445
Finally Boosted!!!!!!!
Thread Starter
I agree that the "airwaves" coming off the compressor blades are the biggest concern. And moving the MAF sensor farther away from the compressor inlet is the best place to start. Installing metal screens at the inlet and outlet of the MAF tube should also help.
#447
Registered User
I used to see normal MAF readings when I worked at the dealership even though a MAF was bad. And they tend to make the engine run either full rich or lean. On the cars I worked on the MAF would make the STFT go lean most of the time but once in a while they would rich. I never worked on Mazdas on a daily basis so I wouldn't be able to say which way they tend to go. Maybe you should try and ask a tech at the dealer. It would be way easier and faster to do a quick sensor swap than anything else.
#450
Finally Boosted!!!!!!!
Thread Starter
I used to see normal MAF readings when I worked at the dealership even though a MAF was bad. And they tend to make the engine run either full rich or lean. On the cars I worked on the MAF would make the STFT go lean most of the time but once in a while they would rich. I never worked on Mazdas on a daily basis so I wouldn't be able to say which way they tend to go. Maybe you should try and ask a tech at the dealer. It would be way easier and faster to do a quick sensor swap than anything else.