Things leaned today....T-stat and detonation control

[WJM]

Run with a T-stat installed. There is a reason. The engine/coolant will be cooled like its supposed to be. Running w/out it....big no no.

 

Detonation control....

 

So i ahve the dizzy one tooth farther advanced than stock....because I found I was advancing it farther than it could travel and still no knock...so i bumped it up a tooth. Seemed fine. Then...i noticed TONS of raw fuel under boost out the side pipe....and my fuel mileage dwindeled to 17 MPGs...NEVER has it been so low in interstate travel. Plus...upon initial turbo spool....knock like crazy.

 

So...retard it some...better. 18 MPGs now. Retard some more...even bettAr! close to 20 mpgs now.

 

 

my conclusion: Stock EA82 MPFI/Turbo ECU solves detonation by dumping more fuel. No wonder the 88 and 87 odnt detonate stock with 30 deg timing and leave clouds of fuel under WOT....but the 88 got close to 30 mpgs at one point....

[archemitis]

do you think the knock sensor sends the signal to the computer which lengthens the injector pulse?

i thought it controlled detonation with timing. like it would just retard it to its base setting.

[WJM]

do you think the knock sensor sends the signal to the computer which lengthens the injector pulse?

i thought it controlled detonation with timing. like it would just retard it to its base setting.

 

the sensor just sends back to te ecu how much noise the enigne is making...and ecu dumps fuel when there is too much noise. I thought it could retard the dizzy too....but there is only movement for advance...aka vac advance.