Evo_Goodness

So I think I am ready to convert to speed density I have seen many times how people like using the fuel temp sensor since it is already in the car for speed density.
But no one really says how you go about doing it using the fuel temp sensor over the GM AIT sensor being welded in that is.

I have searched the forum a lot looking for a guide but no luck on it all I can find is how people like it better Google doesn't bring up a lot either in the subject

Raceghost

iTrader: (4)

I could be wrong, but the Fuel Temp Sensor, is at the tank. I am not sure how they are using it conjunction with what your asking either. Be interesting if someone posts up some good data on this. I am very curious.

Evo_Goodness

I'm pretty sure it's in the tank also but I have now seen it brought up in many posts that it works just as good as having a GM IAT sensor being welded in just much easier to do since it's one less part you have to deal with.
But again I have not found anyone saying how you go about swapping to SD using it just that it can be done

JohnnyTSi

iTrader: (3)

https://www.evolutionm.net/forums/ec...ml#post9263776


[EDIT]
The above link has a reference to how to use either the fuel temp sensor, or the IAT sensor as input for the MAT.


My car has used the fuel temp sensor for years now, it seems to work just fine. There is a side effect I've recently noticed (just started logging MAT). the longer you drive, the warmer the fuel gets. On a hot day I've seen the fuel temp sensor report 20-30 degrees higher than ambient temps. This is most noticeable when the fuel tank is lower than 1/4.


I'm actually thinking about switching to IAT for MAT and see what the difference is. (if any)


John-


[/EDIT]

Klaiceps

iTrader: (18)

From what I've read the only drawback to using your IAT is the sensor getting heatsoaked and causing starting issues. The work around to this is to install the sensor right after the intercooler where hot engine temps won't affect it.

Evo_Goodness

Thank you for posting that I don't know how I overlooked that in the thread with the fuel temps changing do you notice any power loss or anything like that ?

JohnnyTSi

iTrader: (3)

hmmm, Thanks for the heads up on this challenge, as luck would have it, my IAT bung is up by the throttle body.



At the 600+ whp level, the butt dyno is a bit challenged to notice. Every once in a while, I do get some unexpected knock on an otherwise solid tune. During my hunt for cause, I started logging MAT temp and noticed the odd rising fuel temps. I haven't yet positively correlated the fuel temp rise with the knock, its just a possible contributor.


My car has been using fuel temp on my SD tune for years, it is definitely a useable option.


John-

Evo_Goodness

Well I'm not at 600whp maybe next year after I free up some funds the wife said I can give my baby new guts so a built 2.0 it will be with in thinking FP Red/FP Black not sure on which turbo yet pretty limeted to 92OCT we have E85 but the closest station is 40 miles from me so not really logical lol...

Thinking an FP black built bottom end some head work and maybe an AEM meth kit might tip me into 500 is my plan but who knows