sleeper7

This is on the dyno.

Sensor is before the T-body and fuel system was 6x1600 injectors in the manifold. Today we added two 680 injectors about 10 inches before the t-body. IF I had to guess what the air temps would have been without the two extra injectors and a big fan in front of the car, around 140f. Well today's outside temps were 75 f. No fan in front of the car. My air temps started at 90f but as soon as the two extra secondary 680 injectors came on, the temps dropped to 68 f. Rose to around 80 at 7500 rpms were we let off.

120$ ebay intercooler for the win. core size 24x12x4 3 inch in/out

Just thought I would share.
chuck

Liborek

Fuel evaporating from sensor element causing lower sensor temperature than its surroundings? Or did engine picked up noticable power associated with lower temperature/higher density of air charge?

Someone should stick thermocouple into intake port to really see temperature of charge entering the engine

sleeper7

No power increase. Been running same fuel but since sensor was so far away from injectors I did know know how much lower the fuel was dropping the air temps. Now that I have two injectors before the sensor I have a better idea of the air temp entering the motor.

Not sure how much fuel is evaporating around the sensor, I do know that fuel is being sprayed on it. Sensor is before the t-body in the intercooler pipe. Should never get heat soaked.
Bet the air temp drop is not just from ethanol but from cold fuel being sprayed on the sensor. Bet gas would have netted the same results.

Talked with a few guys that have changed fuels. Gas to ethanol. Said they did see a noticeable drop in air temp. Honda guys who's sensor is in the manifold.


My air temp correction map is zero under boost.

sleeper7

Spoke to soon.

Made a few passes and the air temp at the end of the track was in the 140f.

Temp would start at ambient then in 1st gear it does drop from 85 to 70. 2nd gear it stays below ambient. The starts to climb from 3rd gear threw 5th gear.

I may move the air temp sensor to the lower manifold to see if 11,000 cc of fuel at 90% duty does to the air temp.

sleeper7

Currently running 8 1600 injectors. two are in the intercooler pipe around 15 inches from the throttle body. The air temp sensor is mounted around 6 inches before the throttle body.

The two injectors in the intercooler pipe are run from the secondary map.

Last night the ambient temp was in the low 60s. My air temp was 105f at the end of the 1/4 mile. Cheap ebay 12x4x31 intercooler.
just thought I would update this.

Howard Coleman

iTrader: (6)

here's some data for you....

on the dyno, second gear thru not all of fifth gear.... to 184 MPH.

E85, GT4094r, four 2200 injectors along w one M10 AI nozzle in the elbow 50/50 WM.

temp data is between turbo and IC and also in the stock UIM location. data delivered by Type K thermo-couple so it is accurate to the degree and mS.

we run more boost in 4th so the temps were highest in that gear at 151 F peak.

AN V 10 is IAT at the UIM.

AN V 11 is labeled EGT but is IAT just after turbo



howard

sleeper7

Did have it on the dyno a month or so ago. My air temps where lower on the dyno then the track. I've noticed my air and egt numbers are always lower on the dyno then on the track.

Howard, my boost was almost twice as much, I think more heat is generated.? But comparing our air temps is not really a good thing. Mine is before the throttle body and yours is in the stock location.

Was just posting air temp number to show just how much the e85 does cool the air charge. From only two injectors before the air temp sensor. Wonder what it really is at the intake port entering the motor. ? I was thinking of installing a meth injection kit but after seeing the numbers at 150mph, don't think I need it.

did installed a cold air intake for the turbo. Think this made a difference. Could be almost 80/90 deg F difference in incoming air.

Am thinking about running no intercooler with meth injection next month though.

Dex13b

Does everyone have good access to E85 in America? I'm in Sydney Australia and it's extremelylimited here, makes it near impossible to run the rotor on E85.. I wish I had more access so I could wind the boost up !!

mbirt

E85 is certainly most available in the US's midwest region--essentially where the corn is grown. Here in Michigan, you don't have to look that hard for it. It's less prevalent on the coasts and in the south. Here's a map: E85 Map