True Flow air filter
08-21-07, 02:26 PM
#16
Lead Lap
Thread Starter
Agreed... on my other cars that i've used K&N on, I would find the intake tube to be dirty on the inside.
On my old 00 4runner that had a drop-in K&N, my MAF would get dirty every 10-15k miles and i'd get a check engine light.
the dealer would tell me the sensor needed to be replaced, but all it really needed was a q-tip and alcohol. once the sensor was clean it was A-OK.
Now with the Trueflow, i've used it for quite some time now without any problems, the inside of the intake tube is clean, and no MAF sensor problems. (i have 50k miles, using the Trueflow for about 30K of those miles)
I think it's mainly due to the dual density foam, the foam is coarse on the lower part, and dense on the top.
Dan
On my old 00 4runner that had a drop-in K&N, my MAF would get dirty every 10-15k miles and i'd get a check engine light.
the dealer would tell me the sensor needed to be replaced, but all it really needed was a q-tip and alcohol. once the sensor was clean it was A-OK.
Now with the Trueflow, i've used it for quite some time now without any problems, the inside of the intake tube is clean, and no MAF sensor problems. (i have 50k miles, using the Trueflow for about 30K of those miles)
I think it's mainly due to the dual density foam, the foam is coarse on the lower part, and dense on the top.
Dan
08-21-07, 06:58 PM
#17
Lexus Test Driver
I have read many article on the net regading foam filters. All but the sponser sites have test less filtration than paper and cotton filters. Below is one of the article about foam filter and sand getting into the engine.
http://www.duramax.bizhosting.com/My_Truck/foam.htm
I use TRD filter and have accepted the fact that it has less filtration than oem filter. No added performance as far as I can tell and maybe a slight MPG gain. The TRD seems to have more surface area than the K&N and the housing seem to be of better construction.
http://www.duramax.bizhosting.com/My_Truck/foam.htm
I use TRD filter and have accepted the fact that it has less filtration than oem filter. No added performance as far as I can tell and maybe a slight MPG gain. The TRD seems to have more surface area than the K&N and the housing seem to be of better construction.
08-21-07, 09:29 PM
#18
Lead Lap
Thread Starter
[QUOTE=The G Man;2858826]I have read many article on the net regading foam filters. All but the sponser sites have test less filtration than paper and cotton filters. Below is one of the article about foam filter and sand getting into the engine.
http://www.duramax.bizhosting.com/My_Truck/foam.htm
QUOTE]
That's an interesting read, it seems though they are comparing an oiled cotton type filter vs. a non oiled foam filter. I myself choose foam due to bad experiences with K&N, and so far i've been very pleased.
And Yes, OEM paper filters are the best for filtration, but imo, not best for performance.
Dan
http://www.duramax.bizhosting.com/My_Truck/foam.htm
QUOTE]
That's an interesting read, it seems though they are comparing an oiled cotton type filter vs. a non oiled foam filter. I myself choose foam due to bad experiences with K&N, and so far i've been very pleased.
And Yes, OEM paper filters are the best for filtration, but imo, not best for performance.
Dan
08-22-07, 09:57 PM
#19
Driver School Candidate
just got my true flow air filter in the mail. i was gonna go for a trd filter, but once i saw the video and read the reviews i decided on the true flow.
****UPDATE****
after a few days with this filter installed, i hit 20 avg mpg on the highway!!!!! Note: this is with
265/70/17.
not even with the factory sized tires was i able to do 20 avg mpg.
went for a test drive and the first thing i noticed was the acceleration. there is a definite increase in power.
best $40.00 i've spent.
here's a link where i bought the filter from (video is there too, definitely worth watching)
http://www.burtmanindustries.com/zoo..._truflo_03u_v8
****UPDATE****
after a few days with this filter installed, i hit 20 avg mpg on the highway!!!!! Note: this is with
265/70/17.
not even with the factory sized tires was i able to do 20 avg mpg.
went for a test drive and the first thing i noticed was the acceleration. there is a definite increase in power.
best $40.00 i've spent.
here's a link where i bought the filter from (video is there too, definitely worth watching)
http://www.burtmanindustries.com/zoo..._truflo_03u_v8
08-23-07, 10:17 AM
#22
Lexus Test Driver
The foam had 6K miles on it I believe, thats not much for a 50K mile filter. The paper was the same but the gauze had the highest flow but least filtration. Seems to me that the foam is better for off road applications.
08-24-07, 11:54 AM
#23
I put mine in last week before a 1500Mile road trip and I average 18-19MPG most highway miles and thru the Smokey Mountains, TN/NC US321-441 (what a drive 
and the GX performed very well) at one point with A/C on most of the time. I did not feel much in power increase... maybe I was not more sensitive on that as I was on mileage. I am happy though with the mileage
. I think the truflow filter helped
and the GX performed very well) at one point with A/C on most of the time. I did not feel much in power increase... maybe I was not more sensitive on that as I was on mileage. I am happy though with the mileage. I think the truflow filter helped
08-25-07, 11:42 PM
#25
part no. 40201. when i ordered it thru www.trueflow.com lexus GX470 was not listed so i searched for toyota and the closest is the tundra 00-06 4.7L which I figured is same engine as ours. i did call someone from there and they confirmed it.
40201 Premium Air Filter Toyota Tundra 3.4L, 4.7L 00-06
for further info on the engine see wikipedia:
http://en.wikipedia.org/wiki/Toyota_UZ_engine
hope this helps.
40201 Premium Air Filter Toyota Tundra 3.4L, 4.7L 00-06
for further info on the engine see wikipedia:
http://en.wikipedia.org/wiki/Toyota_UZ_engine
hope this helps.
08-27-07, 02:39 PM
#26
Rookie
Join Date: Dec 2004
Location: NJ
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Lower Gas Mileage
Well, I needed a new one and ordered it. Installed it no problem but...I am getting lower MPG's than before! I was averaging on the computer readout about 14.7 and now, I am getting 13.3.
Any ideas?
Thanks!
Any ideas?
Thanks!
08-28-07, 07:57 AM
#27
Lead Lap
Thread Starter
Try disconnecting the battery for 5-10min, that should reset the ECU.
08-28-07, 10:10 AM
#29
