Another ISR qustion (I apologize in advance)
#1
Another ISR qustion (I apologize in advance)
I want to do the ISR mod on my 94 4runner with a 3.0. I have read everything that I could find about it on this site and I still have a couple questions. Has anyone seen a significant increase in gas milage from this mod? And has anyone thought about using a 3" plastic air duct like one from autozone. I figured that I would be easier than going to get a piece of pipe bent. Please let me know if you have any comments. Thanks
#3
Originally Posted by msuguy44
And has anyone thought about using a 3" plastic air duct like one from autozone. I figured that I would be easier than going to get a piece of pipe bent.
You won't see a significant increase in mileage. However, I did notice a very slight increase in performance. I do like the new sound though. And you might as well modify your air box while you are at it. Drill a bunch of holes in it and get rid of that little scoop that pulls air from behind the headlight.
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I would encourage the metal pipe. I don't know what kind of plastic you're talking about but you have to remember that it gets hot enough under the hood to cook food. Probably be best to have something in there that you don't have to worry about.
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I took my mock up piece that I bent out of dryer duct and took it to a muffler shop. The guys had some spare 3" pipe laying around and bent it for me. Took them about 10 minutes and it was free.
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