High Intake Temp?

[Ceddy]

I'm getting what what seems to me a high intake temp.
It was about 55 today. (Crazy weather)
Under light cruising I get temps in the high 90s to low 100s.
If I let it sit and idle for like 15 mins it gets up to 130.
I have a huge ebay FMIC and have cut my bumper out alot, also I'm running a 14b.

Are these temps high or am I worrying about nothing?


Also I think I'm getting bad phantom knock at idle, about 5-7 degrees timing.
If I free rev a little my timing jumps into the 20s and 30s.

Would having the timing retarded to 5 degrees significally increase intake temp?

 

[xioca]

The intake temp is measured at the MAS so the fact that you have a FMIC wouldn't change anything. If you hacked your aircan that is why your intake temps seem so high. It also shouldn't matter waht it is as it will get heated up going through the turbo, and cooled at the ic.

 

[Ceddy]

OK, thought intake temp was measured at the manifold.
Doesn't the ECU have to compensate for different temp/density of the air that the turbo heats up?

I'll have to make divider to keep my air filter seperate from the engine bay.


Thanks.

 

[perley03]

It also shouldn't matter waht it is as it will get heated up going through the turbo, and cooled at the ic.

Don't give advice that is not true. IT DOES MATTER WHAT THE INTAKE TEMP IS. The ECU calculates the amount of air entering, the barometric pressure, and the temperature. It then calculates the amount of fuel to inject by these variables. The lower the intake charge, the more amount of timing you can run, because hotter intake temps lead to preignition (detonation, or knock).

To the OP: Did you install your heatshields when you did the 14B swap? If not, put those on, and re-log to see what your intake temps are. Also you can build a shroud to protect the engine bay's heat from entering the MAS, and only cold air from the outside can enter.
Another thing you can do is heat wrap your intercooler pipes to protect them from the heat (in places where they seem to be the hottest).

 

[xioca]

The majority of people I know run a hacked air can with a K&N and call it quits. You can make a cold air box but the results are minute compared to how it affect a N/A car. What I said was not untrue. His temperatures that he reported are nothing to worry about. As long as it's not outragest a hacked air can will not cause any problems.

 

[Ceddy]

To the OP: Did you install your heatshields when you did the 14B swap? If not, put those on, and re-log to see what your intake temps are. Also you can build a shroud to protect the engine bay's heat from entering the MAS, and only cold air from the outside can enter.
Another thing you can do is heat wrap your intercooler pipes to protect them from the heat (in places where they seem to be the hottest).

I have a slowboy heat shield on the manifold. I'll have to pick up the lower one see if that one will still fit.

Is it correct that intake temp is measured at the MAS? I'm thinking that the turbo compressing your intake air would heat it up alot. When I log a hard pull I can see intake temps rising fast. Is that just my engine bay heating up?

 

[blcknspo0ln]

I have a slowboy heat shield on the manifold. I'll have to pick up the lower one see if that one will still fit.

Is it correct that intake temp is measured at the MAS? I'm thinking that the turbo compressing your intake air would heat it up alot. When I log a hard pull I can see intake temps rising fast. Is that just my engine bay heating up?

Intake temperature is measured at the mass airflow sensor. On my 2g open element air filter stock 2g MAF car, I get consistent 86*F pulls as long as I haven't ran my car hard for a long time or back to back runs.

 

[nuclearpenguin]

I'm getting what what seems to me a high intake temp.
It was about 55 today. (Crazy weather)
Under light cruising I get temps in the high 90s to low 100s.
If I let it sit and idle for like 15 mins it gets up to 130.
I have a huge ebay FMIC and have cut my bumper out alot, also I'm running a 14b.

Are these temps high or am I worrying about nothing?


Also I think I'm getting bad phantom knock at idle, about 5-7 degrees timing.
If I free rev a little my timing jumps into the 20s and 30s.

Would having the timing retarded to 5 degrees significally increase intake temp?

As mentioned above, when putting my heat shields back on my intake temps dropped like 20 degrees (F), and that was in the Summer...

As far as your timing numbers go, they seem to be within spec. During idle/free revving they will bounce around alot, the only place you really need to eye them is on WOT pulls. And there's actually the opposite effect on timing vs intake temps. If the temps go up, the ECU pulls timing (both coolant AND intake temps).