malibuguy 14 Posted October 15, 2013 Share Posted October 15, 2013 My yaris during the winter I run flexible stove duct from my air box to my header and typically get back 3-4mpg...but at the cost of very noticeable power Link to post Share on other sites
malibuguy 14 Posted October 15, 2013 Share Posted October 15, 2013 My yaris during the winter I run flexible stove duct from my air box to my header and typically get back 3-4mpg...but at the cost of very noticeable power Link to post Share on other sites
Chris Bemis 5 Posted October 15, 2013 Share Posted October 15, 2013 I have the other side of the air box sealed, not using the resonator right now. Link to post Share on other sites
tommyspark 24 Posted October 15, 2013 Share Posted October 15, 2013 I'm very curious to see what kind of MPG gains you get. Link to post Share on other sites
tommyspark 24 Posted October 15, 2013 Share Posted October 15, 2013 I expect to lose some power no doubt, but worth it if it gives MPG gains. Your intake tube was crazy long; which would also make you lose power. The Spark has a much shorter one, which should eliminate some of the power loss..... Link to post Share on other sites
Greg_E 211 Posted October 15, 2013 Share Posted October 15, 2013 I'm only interested in the warm air intake when temperatures have highes in the 40 degree F range so I know the extra heat will not damage anything. Link to post Share on other sites
tommyspark 24 Posted October 15, 2013 Share Posted October 15, 2013 Ya.its.still.70s during the day here..... but its.gonna.get COLD.soon Link to post Share on other sites
Chris Bemis 5 Posted October 15, 2013 Share Posted October 15, 2013 The warm air intake was NOT successful. All of my testing so far has shown that this car does not seem to like warm air at all. Today, driving with the warm air intake mod, I only averaged 38.6 for 42 miles. The air temp started at 44 and got up to 50 by the time I was done. There was some stop and go, some 50 mph and some 70 mph during this drive. I then pulled over, and put it back to stock, but the resonator taped off. I then drove another 20 miles and averaged 42.5. The air temp was steady at about 50 at this time. There was a little stop and go, some steady 50 mph and some steady 75 mph. Basically, everything I have tested so far, I think warm air is not this engines friend. Remember, GM made a point to SEAL the incoming air to the hood and grille. They also put that wrap on the pipe, near the exhaust manifold, which I think is an insulator. So, I went the other way with my experimenting now: Stock on the one air box hole and cowl induction on the other air box hole. This resulted in an average of just about 44 mpg. This was for about 10 miles on a hilly route with an average speed of about 45 mph. This car seems to LOVE fresh, cold, air. Below are pics of the cowl induction setup I built. Some hose, the neck of a weed killer bottle, a couple of zip ties and a nylon push thing to keep the neck in place on the car. I can put it back to stock in under 2 minutes and if I think rain is going to be a concern, which I don't, I can just undo the neck if it is raining. Link to post Share on other sites
tommyspark 24 Posted October 15, 2013 Share Posted October 15, 2013 Thanks for all the testing. Let us know how the cowl works out! Link to post Share on other sites
Chris Bemis 5 Posted October 15, 2013 Share Posted October 15, 2013 So far so good. I'll be doing some more driving tomorrow, including highway stretch at 75 mph. If it keeps delivering increased mpg, I'll make a better version, with smooth hose and I'll cut out the section of rubber trim that goes along the top of the hood. I'll also get ride of the orange tape at the air box and make it black. Link to post Share on other sites
Greg_E 211 Posted October 15, 2013 Share Posted October 15, 2013 That should be a low pressure area so it would actually pull air out of the intake. You might be seeing an increase in mileage because it is blowing clean air up through an area that is normally turbulent. Cleaning up the airflow over the car could have a huge impact. Link to post Share on other sites
Chris Bemis 5 Posted October 15, 2013 Share Posted October 15, 2013 Muscle cars have used cowl induction for years. Link to post Share on other sites
tommyspark 24 Posted October 15, 2013 Share Posted October 15, 2013 My only concern is I'd be worried about sucking in water...... with the tube positioned the way it is, I would think that gravity would pull water into the airbox?! Any ideas how to prevent that? Other than that, seems like a legitimate idea Link to post Share on other sites
Chris Bemis 5 Posted October 16, 2013 Share Posted October 16, 2013 I don't think its of much concern. Even if water got down to the airbox, I doubt it would suck up through the filter into the intake. I'll have to check, but there are likely drain holes in the air box. If not, I'll just drill one or two small ones. Link to post Share on other sites
Chris Bemis 5 Posted October 16, 2013 Share Posted October 16, 2013 Plus, water coming down the windshield hits that ribbed plastic first and there is also a smooth ledge right in front of my funnel. Link to post Share on other sites
tommyspark 24 Posted October 16, 2013 Share Posted October 16, 2013 Now lets just hope you get awesome mpgs! Link to post Share on other sites
Chris Bemis 5 Posted October 16, 2013 Share Posted October 16, 2013 It rained a lot last night and the car was in the driveway. I opened up the box this morning and there wasn't a drop of water in it. Getting a nice long highway test drive in this morning. Link to post Share on other sites
tommyspark 24 Posted October 16, 2013 Share Posted October 16, 2013 Keep us posted Link to post Share on other sites
Chris Bemis 5 Posted October 16, 2013 Share Posted October 16, 2013 I did a 105 mile drive today. Pretty much a square, with a decent wind. Combination of highway and surface street. Average speed around 52 mph. Average air temp 58 degrees. I averaged 43.3 mpg with the cowl induction. On the first leg of my trip, with the tail wind and then a cross wind, averaged 47.1. Link to post Share on other sites
tommyspark 24 Posted October 16, 2013 Share Posted October 16, 2013 According to what the car tells me, w the intake modded n the exhaust work, I get 60+MPG @ 50 MPH & 50+ MPG @ 60 MPH.... may just leave it the way it is.... Link to post Share on other sites
tommyspark 24 Posted October 16, 2013 Share Posted October 16, 2013 Link to post Share on other sites
Chris Bemis 5 Posted October 16, 2013 Share Posted October 16, 2013 52.5 is really good. I do a lot of interstate driving at 75 mph. I noticed that the mpg goes way down the faster I go. But, I'm not about to be that guy that goes 50 mph in a 70 zone to save on fuel. I'm going to experiment next with making the wheels smooth. Start with tape and then decide if it is worth it to make some smooth covers out of pizza pans. Link to post Share on other sites
tommyspark 24 Posted October 16, 2013 Share Posted October 16, 2013 Our speed limit.is mostly 55 around here. Well see how.she.does next time.im at 65+ mph.... before the exhaust work I.NEVER saw better than 47 MPG @ 60 MPH. @ 50 mph the best I.saw was 51.... Link to post Share on other sites
tommyspark 24 Posted October 16, 2013 Share Posted October 16, 2013 Now @ 50 mph it'll tell me 61-63 MPG Link to post Share on other sites
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