Air intake temp (AIT)/ water/meth ?

[junkyarddsm]

Ok so I have been thinking on this for awhile now and have done some looking though the form and searches but have a few questions regarding this whole idea that I have and would like some help on if its a good idea or just a waste of time. Here it goes im doing a supercharger conversion for the 420a and it will bolt right onto the intake (no after cooler). I want to run 8 psi of boost but just not sure if at full boost how it is going to change the AIT's and if it would help I was thinking that a water/meth kit would help to keep the ait's down. I am just not sure if I would really need water/meth with that low of boost to really see any real change. Also this is a dumb question but does anyone ever run a ait sensor gauge to keep keep an eye on it? I live in southern cali and it get real hot some days so I was just a thought that I had. I thank you for any help.

 

[PieEyedPiper]

Ok so I have been thinking on this for awhile now and have done some looking though the form and searches but have a few questions regarding this whole idea that I have and would like some help on if its a good idea or just a waste of time. Here it goes im doing a supercharger conversion for the 420a and it will bolt right onto the intake (no after cooler). I want to run 8 psi of boost but just not sure if at full boost how it is going to change the AIT's and if it would help I was thinking that a water/meth kit would help to keep the ait's down. I am just not sure if I would really need water/meth with that low of boost to really see any real change. Also this is a dumb question but does anyone ever run a ait sensor gauge to keep keep an eye on it? I live in southern cali and it get real hot some days so I was just a thought that I had. I thank you for any help.

I made one out of cheap crap from O'rielys. I like it but I have a feeling it's not accurate enough. Max temp of the probe is only 150F. This is also a charge temp, not plain old IAT. My ECU tells me all that stuff already.

 

[johneclipse]

I made one out of cheap crap from O'rielys. I like it but I have a feeling it's not accurate enough. Max temp of the probe is only 150F. This is also a charge temp, not plain old IAT. My ECU tells me all that stuff already.

This. Everyone running link has an AIT reading to watch.

 

[Burnett03]

This. Everyone running link has an AIT reading to watch.

Huh?

 

[VelocitàPaola]

This. Everyone running link has an AIT reading to watch.

He has a 420A, so ECMLink is out of the question -- though he could just as easily do the same thing with a MegaSquirt ECU, or even a plain old datalogger.

OP, you can add an aftermarket IAT gauge, but there aren't many companies that make them.

 

[junkyarddsm]

I will be running a ms system once I start the project didn't know that option was on ms. Ok so not going to need an IAT gauge but what about my water/meth question that I had right now im just kinda on like a huge parts order so I was something to add to my list still have like 2-3 months till I see my car again.

 

[tkelly27]

You want water/meth after the IAT. If a droplet gets on there, the IAT will read the temperature of the droplet, not the temp of the air around it. That's bad for calculating the amount of fuel required.

Water/meth done right is evenly distributed into the cylinders just before the intake valve like the fuel injectors. As difficult as it is to get air to distribute evenly into the cylinders, a single nozzle puts much heavier liquids that stick to surfaces, puddle, and stream. Trying to get them to go evenly between cylinders is mostly not possible with a single nozzle.

If you don't want to go through the multi nozzle trouble, I really like the AEM kit. Any kit that is similar to it will be fine, but I've only worked with AEM, and I've seen it save people's a$$es. With a small amount of math and labor you can easily turn any kit into a nozzle/cylinder setup.

Will it help with your setup? It might let you push a little further than you would otherwise. If you're not running an intercooler with the supercharger I wouldn't try to do it without it. I would try to intercool it if you can though.

 

[Locke]

I want to run 8 psi of boost but just not sure if at full boost how it is going to change the AIT's and if it would help I was thinking that a water/meth kit would help to keep the ait's down.

Boosting an engine's intake is largely an isometric process. Increasing the pressure of the air charge by any degree without increasing the volume must cause an increase in temperature. See: Ideal Gas Law for the basics.

We typically say that more than 5psi of boost on a 420a is dangerous without employing some method of cooling. (per Bill Hahn's initial testing)

 

[Slo2gen]

Probably not what you want to hear but you could use the a water cooled throttlebody like the camaro's etc use except have it plumbed like a water cooled intercooler set up. That way it will help a little bit. I mean if you modding the intake to bolt a supercharger on it and using MS to tune it then making an adapter for a different throttlebody and plumbing a pump and heat exchanger shouldnt be too bad for you.