Hi Shiv, Brett,

Do you guys include some kind of heat shield for the downpipe in your exhaust kit? I'm just worried about oil temps increasing.

The stock stock downpipe is covered with an extensive heat shield.

Steve

 

Na its not terribly close to the pan. You can wrap it or make a simple one out of Al if your worried. I really dont see oil temps change at all

 

 

As tested after the oil cooler during a 25 min track session

 

Not before?

 

No why when there is an oil cooler and your reference is after the oil cooler? If there is little to no change on the cool side the system isnt overrun

 

If those are your findings then ideed the system is not overloaded. But in the 2nd post you stated the temps did not rise (while being measured after the cooler). While your statement is true it is possible you are raising temps and the cooler is efficient enough to bring the temps back down.

I am horrible at explaining this stuff online.. But I'm trying to get at.. For your statment to be of any value (at least to me) I would like to see temps measured before the cooler. No variable to skew readings

 

I coulda easily have plumbed before the cooler! There is absolutely no sense to measuring before a dissapative device in an application such as this! That is taking all the variables out of it- How well the "SYSTEM" as a whole works in its entirety not a peicemeil approach. What I wanted to find out is not if the DP added heat to the oil but also if the cooling system was up to snuff - lets cook some noodles here and go through the whole story. First (I dont have my notepad here so I wont quote any #s) two 25 minute sessions with stock exhaust. Then replugged my xede and slapped on the TB (took less than an hour) two 25 minute sessions with the TB/ Xede and 40 more HP No noticable change in oil temp- Sure not absolutely end all scientific eyeballing an analogue at certain points on the track and itd be stupid to say there was absolutely no increase but It was insignificant for my purposes under extreme conditions. Hope that helps

 

I understand what your saying. My inablity to properly explain myself in a on-line forum does not help the matter here. I know full well what you were doing and would plumb my system the same way if I was to install an oil temperature device. That is not the point I was attempting to make. If your simply wanting to know if oil temps were affected by the addition of said exhaust, you would want to measure it pre-cooler both before and after the addition of the exaust. That way your seeing the oil temps exiting the motor, giving you data before the cooler has a chance to do its thing.

Simple example: EVO bone stock... throw on a boost controller and turn the boost up 2psi over stock measuring AIT's after the intercooler. Are the compressor outlet temps higher (for the sake of this example)? Sure 10deg F more... But due to the intercooler having some headroom in its capacity the outlet temps are the same.

 

Justin:

You might consider 160 degree thermostat if your are worried about temperatures.

You aren't going to get that much more sink from the downpipe.

Hope that helps.

JS

 

Understood and I appreciate the difficulty of this meduim to properly explain onesself. Just as in your IC example we can be fairly sure that the addition of 40 HP and an unsheilded exhaust and 10 psi more boost added additional heat before the oil cooler and the IC. What I simplify and find important is the question of if I am taxing the cooling units to properly cool. In the case of the Oil it to me is no the system has the headroom to cool as good as unmodded with the poweradders I have installed and the tuning to the ECM. I try to test under Roadrace conditions as I feel continous 25 minute on off WOT is about as much stress as my car sees

 

Thanks for the advice, but I've got nothing more than a BR filter on my car. I'm not too concerned about heating things up too much just yet.

MP5:

 

Absolutely a round for ya too

 

I plan on wrapping my DP with a roll of 2" Thermotec. A 2" x 100' roll is $73.95 from Summit.

 

What about ceramic coating? I changed from regular headers to cermaic coated on my Mustang and it lowered underhood temps quite a bit. Just a thought............
John