Thread: Underhood/Intake Temps

Originally Posted by J57ltr

Hell no, you would have better luck on the SCCOA website. They have tons of tech and they also have the IAT mounted after the intercooler at the adapter elbow where it enters the LIM. Look for XR7Dave or Randy Connie or Duffy if they are still there. That board only goes back to about 02'.

a thought occurred to me this morning and if you have a thermocouple you could put a 3 way T at at the reference point for the MAP and boost dump solenoid (if you have one). I would do it but until I can actually get my car into boost it'll have to wait. I probably have a bad knock sensor so when I get time I'll fix that. I do have a 2 channel thermocouple thermometer that reads and records min/max and shows differential as well.


Jeff

Actually this has been done before, and there were write up's on it too. Yes, here... Not sure if I remember correctly but Reptile can chime in. Made a special set up for iat in the LIM? Was some time ago. Is cool to do and such, but worrying about a few degrees difference with intake pre-post SC is a waste of time imo... Might as well purchase the SNOUT cooler as well if you're looking to reduce temps. Get the fuel line cooler too... But all in all, you're still going to scan and still going to have to TUNE for dropped pulleys and MAX HP... Doesn't matter what iat is because you will adjust for it. The fueling, timing is where you're going to make the difference, not in 10-15* drop in temps. As for recording effects from different set up's... What you may want to do is just look at HP records and determine their setup and try and mimic it if you're looking for those levels of performance. Putting an ice block on a SC while dyno-ing doesn't count either, Lmao!

Bottom line is this... It's an old platform, and there aren't many NEW things that have been done.

Lastly, forget the plog unless going turbo, headers are best. Go 3" to the tails imo for best breathing but only benefits if opening the intake too, ie, GenV, N*, Stage* Heads, Cam, etc., in my most humble opinion...

: )

Originally Posted by J57ltr

If it has been done before then I haven't seen it. Doesn't mean it doesn't exist but it means that every time I search for a technical explanation of something it's either met with 0 comments or some one paying fun and games and never getting to the point.

A few degrees difference is not a trivial matter it is something that should be a known. I am not a freaking newbie to engines and forced induction so your comments about cooling the supercharger snout and fuel line I find a little insulting. If you think that there is only a 10-15* drop in temp your mistaken I have seen temp swings over 100* in fact driving around in traffic yesterday I had intake temps in the 160* range and in the mid 80's when cruising. I changed up the system a bit and well see how it does today.

I am also not interested in mimicking anyone here, I like to learn and do my own thing, this is a hobby for me, therefore when someone asks a question that has some merit then answer or point them in the right direction. Do you guys purposely get on the board to act like little trolls?

As far as being an "old platform" and there aren't many "new" things? Engine technology has come a LONG way since I started playing with engines and go fast goodies. I consider these cars "late model" still to this day.

Jeff

Not acting nor am I a troll... But if I found the same information you're refering to, then it's out there. I don't have e link any more or would've provided it. If you're not a newbie to engine work then you shouldn't be insulted and if you look hard enough you'd understand the point I was trying to make, that although a worthy effort, it won't result in much of a performance change as much as just addressing the KR you'll read while scanning with your mods. There is an actual snout cooler that was marketed for some time, all placebo effect, there was also a real nice fuel line cooler with little effect. All because of the supercharged, super-heated air created once you start dropping pulleys and spinning the SC at ridiculous speeds. Intercooling is proven, E85 is proven, Meth, etc. And no matter where you'll scoup ambient outside air from and channel it into the intake, it won't make much difference at all.

Lastly, an old platform it is, the 3800 had a very nice long run and the moral of that story is that pretty much everything that could be tried to eek a few more HP, or .01 sec. , has been tried. Not my intent to discourage you, nor insult you... Just trying to save you some time, $ and headaches. But sure, give it a go, I'll just read from now on.

Have a nice day!

Been done in 2008, why not ask bill about it?

http://www.pontiacbonnevilleclub.com...ff0939b765bb61

You can PM Bill and ask if he has any numbers from his testing, I'm sure he didn't install the sensor and not record any data. IMO, your time and energy could be spent elsewhere for better gains. Looking at the Calibration Data > Spark > Base Timing > Air Temp Spark table in DHP right now, the highest timing removed is 7* at the highest IAT (80C from 80-240 mg/cyl ie cruise range), then tapers down to 3* from 400-680 mg/cyl (where you would be getting to at WOT). The majority of the time your IAT is at those levels (if it gets there at all), you're sitting at idle at a stop light in traffic, once you get moving again, it drops back into the normal range (ambient or close to it) where it's not affecting the timing at all (at the 30c range it doesn't add or pull timing). Alternatively, you could also just 0 this table out so it doesn't affect timing at all, and I doubt it would increase KR one bit. In fact I may just do that, one less thing adding/pulling timing.

What exactly do you plan to do with this information when/if you manage to obtain it? We already know they're "high", I just don't understand why "how high" matters. Comparing intercoolers, or ported blowers, etc would make sense, but wanting to know just for the sake of knowing?