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E.Roy · 10-01-2013, 07:27 PM

I just picked up this 2000 Corolla LE 4spd Auto for a commuter. My goal is achieving 45-50mpg so I began searching for some mods to get me there, and found this thread.

I think in 2000 the Corolla/Prizm switched to MAF sensor and Coil on plug from Map senor & distributor. I began getting baseline info on the intake temperature and modding to a WAI. I believe that by moderately warming intake air, I will be able to achieve close to summertime FE in Buffalo's Winter temps. HOT air will likely not help this car. I have read the ECU starts retarding timing at high temps.

Here is my temp probe setup. $26 Digi thermo from McMaster.com. Probe needle was .150", drilled clean .125" hole and pushed it in.

I tested the stock intake plumbing 1st and then removing the stock plumbing up to the air filter box, both had the same temperature result, 7degF over ambient outside temp over a couple days of observing between 60-75F. Removing the plumbing added a little noise and a little throttle response/power.

After initial testing, I modded my airbox to a WAI, pulling air off the firewall

The results from the WAI arrangement shown were a boost to 17degF over ambient, seen here cruising at 65mph

I still have no info as yet on FE improvement or degredation, but stayed tuned...

10-01-2013, 07:27 PM	#12 (permalink)
E.Roy fuel conserver Join Date: Oct 2013 Location: Buffalo, NY Posts: 76 Civic - '99 Honda Civic EX Thanks: 48 Thanked 15 Times in 13 Posts	I just picked up this 2000 Corolla LE 4spd Auto for a commuter. My goal is achieving 45-50mpg so I began searching for some mods to get me there, and found this thread. I think in 2000 the Corolla/Prizm switched to MAF sensor and Coil on plug from Map senor & distributor. I began getting baseline info on the intake temperature and modding to a WAI. I believe that by *moderately* warming intake air, I will be able to achieve close to summertime FE in Buffalo's Winter temps. HOT air will likely not help this car. I have read the ECU starts retarding timing at high temps. Here is my temp probe setup. $26 Digi thermo from McMaster.com. Probe needle was .150", drilled clean .125" hole and pushed it in. I tested the stock intake plumbing 1st and then removing the stock plumbing up to the air filter box, both had the same temperature result, 7degF over ambient outside temp over a couple days of observing between 60-75F. Removing the plumbing added a little noise and a little throttle response/power. After initial testing, I modded my airbox to a WAI, pulling air off the firewall The results from the WAI arrangement shown were a boost to 17degF over ambient, seen here cruising at 65mph I still have no info as yet on FE improvement or degredation, but stayed tuned... __________________ '02 E-350 7.3 Diesel (Work Van) '91.5 Cummins 4x4 (Old Blue) '00 Jetta TDI 5spd '22 Tundra TRD OR '04 RX330 '05 Tacoma 4x4 Last edited by E.Roy; 10-01-2013 at 11:43 PM..