High boost without intercooler

[Tavon]

I recently modified a MPI mountain kit supercharger so I could get more boost by changing the upper pully. the new combo will get me close to 10lbs. I have also added a head shim. The mountain kit did not include an intercooler so my question is this:

If I am running 10lbs of boost without an intercooler, will the added heat of the extra boost without being cooled by the intercooler be an issue? I have been told that if too much boost is added without be cooled it could actually feel like it is running less boost. I don't' exactly remember how it was explained but the bottom line is an intercooler was needed if going past x amount of boost. Another member I ride with is in the same situation so we could both benefit from the correct answer as neither of us are very well versed in this arena.

 

[4StrokeAddict]

True story. Pressurizing air creates heat. Heat makes air loose density resulting in less air being ingested. Also, its dangerous to create too much boost and heat without intercooler. You are risking detonation...

Edit: Ever notice your car feels stronger in the winter...

 

[Big_Phil]

Im curious about this as well. On the Nytro, Im not sure where you would even put an air to air intercooler where it could get any airflow. Maybe if you removed the headlight.

I wonder if anyone has tried to use a water to air intercooler like they use on the Viper turbo kits.

 

[kinger]

I have been pondering this as well. The generalizations are based on boosting applications that typically have above freezing temperatures (cars, bikes, atvs, etc). I wonder what 10-11 psi in less then 20 degree air intake temp would be IC vs non-IC. I almost feel like the IC is not needed but people shrug shoulders and say colder air is always better. I wish it was easy to collect some data on the subject. If on a snowmobile a IC cooled the air 10 degrees vs non-IC its much different then a car in vegas heat cooling the temperature 150 degrees.

 

[4StrokeAddict]

I'm far from an expert but here are my .02. Remember that ingested air is part of the cooling process working in conjunction with other cooling methods. Your sleds for instance will not run all that well in the summer and will overheat quickly. While no intercooler is probably fine when the temps are in the negative digits, you are probably pushing things at higher temps. If the opportunity presents itself, I'll happily do that late season ride in April with 45+ temps. I would not trust my sled with no IC in those conditions. If in the 20's, I'd probably be scared of a long pull. Perhaps someone with more experience can chime in.

 

[Big_Phil]

Intercooling is definitely better, if you use a perfectly sized intercooler, and if you can get proper airflow over the intercooler so it can do its job. On a Nytro this is impossible, as there is no way you will be able to get airflow thru the intercooler, unless you mounted it on top of the hood or something weird like that. If you do put an air to air intercooler under the hood of a nytro, i feel it would work like a heat sink and actually heat the charge air.

I know all the Viper kits use a water to air intercooler, but they dont have have the benefit of the turbo and charge tube being showered by snow in the tunnel. And with the turbo and exhaust mounted under the hood, the under hood temperatures must be extremely high.

Id be curious to know how much the air gets cooled thru the under tunnel charge tube, if it gets cooled at all.

 

[nytrozula]

Can anyone share any pictures of a Nytro with the intercooler installed?

 

[Nytro270]

I know it's not supercharged so that probably changes things but the MCX turbo on my nytro has the intercooler placed right under the hood, I believe in place of a stock radiator. I'll try to take some pictures next Sunday when I'm home if you'd like?

 

[RED]

Nytro270, your under hood radiator was likely removed. Pretty much every Nytro in Western Cdn has the rad removed. Coolant rad has nothing to with your intercooler. There is also a intercooler on your sled in the tunnel.

 

[Nytro270]

Yeah I know, I just ment that it has an under hood mounted intercooler as well as the tunnel mounted one, the one under the hood is what pipes air into the intake

 

[Tavon]

I would really like to see how the intercooler mounts on the Nytro. MPI does not have pictures on their site. Pics of the Apex and Phazer but no Nytro.

 

[Nytro270]

Alright I'll nab a couple pictures when I get home and throw them up for you

 

[ShafeNytro]

Just put mine back on.

 

[Big_Phil]

I ran a whole tank of gas thru my Nytro just drag racing back and forth the other day. Push turbo with no intercooler, about 7 psi. The charge tube was cool to the touch even after repeated drag pulls, from a stop to top speed.

 

[hyprst]

Tavon, did you run the 10 psi combo? curious to know what your afr was at wot. I'm running 10psi with fuel pump upgrade and cant get enough fuel the injectors are maxed out.