DIY Stock Intake Mod

39865 Views 90 Replies 34 Participants Last post by foreverkidd, Mar 30, 2011

Supraman16

Discussion Starter · Oct 4, 2008

Hi Guys,

Well, I got to thinking about the stock dual stage intake and figuring out a way to keep fender side intake opening open all the time. In case you didn't know, the fender side intake opening is closed until around 3600rpm, which is when it opens up, thus resulting in the now infamous and much beloved "IS-F Roar". As you can see from the picture below, all I did was just pull off the vacuum hose from the actuator and plug off the other end with a vacuum cap. Now the "IS-F Roar" comes on around the 2300rpm, and to me atleast, there seems to be a bit more power down low...which makes since because now the engine can breathe a bit better down low with both intake opening being open all the time. The only downside would be if this throws off the air/fuel ratio's from stock. I don't think it will drastically, but I'm not sure. Anyway, try it out and let me know what you guys think. Oh yeah, no check engine light either! Have fun...Darshana S...

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lowrider

· #48 · Mar 17, 2009

I've had my K&N now for 2K miles. I also have the JoeZ intake tube. So far no issues with my K&N.

BTW, I've used K&N for years. My last car, a G35 coupe had a MAF, and worked fine for 6 years with a K&N. It was cleaned and reoiled countless times.

Lou

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lowrider

· #52 · Mar 18, 2009

Supraman16 said:
Hi Lou,
May I ask what your gas milage is? The reason I asked is because poor gas milage was how I found out that the K&N Filter was not a good idea. With the K&N Filter I was consistantly getting no where better than 16mpg. After cleaning the MAF and reinstalling the stock filter I started getting 19-21mpg. I didn't actually notice or feel any oil on my MAF when I removed the K&N filter, but obviously, my IS-F was not happy with the K&N filter. I still got a K&N cone filter on my Supra TT and it has served me well for years, so I'm going to stick with it in the Supra, just not with the IS-F....Darshana S...

Yep, I'm getting between 20 and 22 depending upon how I drive. This, IMHO, is great mileage for a car with this potential.

Lou

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