Northstar Engines and System Technical Discussion Discussion, Custom Intake Finished! in Cadillac Engine Discussion; Do realize that if you run an open element air filter, and have the PCM located inside your engine compartment, ...
Do realize that if you run an open element air filter, and have the PCM located inside your engine compartment, that part of the functionality of the airbox was to draw air around and over the cooling fins of the PCM. You'll notice that the airbox (on many models) draws air right from the PCM's surface, in effect creating airflow across those cooling fins. Keeping the PCM cool is important, especially when running in very hot weather.
This isn't to say that your PCM will overheat if you run a cone filter(it probably will not), but by re-routing the intake air, you'll be losing that protection that was designed into the system.
something i did not realize. But i did know that taking out things like the airbox seems harmless, but if it wasnt needed then they wouldnt have put it there in the first place! Thats why i was against taking out, or even messing with the airbox to that extent.
I was thinking about putting something over the air dam (something as wide and high) that would funnel down to about a 3.5 in flexible hose, which would lead to the airbox. What do you think about that, would it mess up the aerodynamics?
Umm.... all they use is hard plastic.... not sure what you meant by that but I HOPE it's not an insult. BTW, I have noticed MUCH MUCH MUCH better throttle response w/ this system over the stock one. In the future, I'll be sure not to post modifications to my car w/ the hope of educating the board seeing as how you all have the "if it ain't broke don't fix it" methodology.
Who knows? This may spark someone else to come up w/ an even better idea. Sorry for wasting all of your time w/ my personal experiences.
*flame suit on*
"Why make your chevy small block 350 a blown 427 stroker? Don't you think Chevy would have done that if it increased performance?"
I guess that's the reason you guys own cadillacs. You're a bunch of old people who have lost the true spirit of the automobile.
*flame suit off*
Thanks to all those who have true interest in modifying their cadillacs and are interested in other people's setups.
Edit: Jadcock, I think drawing the air in from outside the car will make it cooler than anywhere under the hood.
Please don't take too much offense to constructive criticism. Yes, some of us Cadillac owners are of advanced age. I'm 43 and feel more like 24. I grew up with hot rods and while not as much of a motor head as some, I would research a bit on a project prior to actually doing some work that I might regret later. A wise man learns from his mistakes and hopefully will not make the same mistake again. We are all here for the same reason......to learn and share. You might want to keep that flame suit handy if you feel the need, but I think you could retire it and and just take things with a grain of salt.
Originally posted by playaman Edit: Jadcock, I think drawing the air in from outside the car will make it cooler than anywhere under the hood.
Absolutely. Any air you get from outside the car will be cooler than under the hood. Re-read my post. It doesn't say that drawing the air over the cooling fins of your PCM will keep the air cooler, it says it will keep the PCM cooler -- to prevent a situation where it might overheat (like in 105F weather and stop and go traffic).
If you don't draw the air across the PCM, that computer is subject to the intense heat underneath the hood -- with no air moving across it to cool it off. Again, you probably won't have any problems -- I just wanted to point out the possibility.
But the stock airbox draws in air from behind the FR headlight, nowhere near the PCM. As far as I understand it, and can see, the stock intake doesn't draw air into the engine at a position which would cool down the PCM. Also, I'm not blocking the grille or air dam w/ my intake so I'm not sure as to what you're saying. Please clarify as overheating IS a concern for me. Thanks.