Hi All,
I know this has come up over and over. I have sean many posts about cold air systems and the pics that some guys have done including hood mods. to get cold air to the S.C.'s.

I have a L98 with a T trim mounted on Driver Side. The air cleaner is attached to the S.C. just above the headers.

I have read many posts that there is little benifit to relocating the air cleaner on my type set-up, because the air cools back down once the car is in motion.

I have some data that I would like to share.

I have headers with Fiber wrap to lower the heat from headers, and a funnel ram Air Cleaner.

I placed a Pyrometer probe in to the cone/funnel area of the air cleaner.
It is the most ballanced / centered place I could think of as the air off the bottom of the cleaner (Nearest headers) will be hotter than the air coming in from the top of the cleaner.

Mesured Data: with 72 deg. ambiant air temp.

0- MPH: 170 deg (Ideling)
30 MPH 145 deg.
60 MPH 120 deg.

My opinion: 170 deg. is not good. that almost 100 deg over ambiant.
Also keep in mind that this is not track data.I was just cruzing. If I made a 1/4 pass at the track, and then staged the car again. I would expect the -0-MPH temp to be even higher than 170 due to EGT disapation through the headers.

Also, the cooling as MPH increase was slow reacting. I am talking minutes not seconds. Therefor, if you made a pass at the track, the air cleaner will be sucking in close to 170 deg for the entire pass.

I would have to argue that there must be some benifit to sucking in 72 deg air as opposed to 170.

I am planing on building an air box in the battery tray location. I would isolate the box to be relative sealed from the engine compartment. The battery tray is exposed to the reverse directed louvers so I would open up the bottom up for air to come in as to prevent negitive pressure while driving.

Any coments, advice, seggestions would be greatly appreciated

Thanks

BLWN BUX

 

If you log your IATs during the various conditions you have mentioned, I think you may be surprised at the results. I did not believe it at first when I investigated, but the proof is in the data.

There is very little benefit from a temp standpoint by relocating the blower inlet. However, there is a large detriment to restricting the suction side of a centrifugal supercharger. Keep the inlet considerably larger than the opening of the SC, which is difficult to do when going by the diagonal brace by the battery tray.

Aaron

 

Maybe its time to add the intercooler. Even if you pick up those 170* temps the IC will cool them off pretty well before it goes into the engine.

I have a turbo setup that basically picks up air from the back top of the radiator. Not ideal for temp concerns, but my IAT's are always under 100* during boost. I start to get some kind of heat soak towards the end part of my run and you can see it increase by a few degrees by the end of the run, but not much.

 

With all things being equal, and having the ability to draw air from outside of a heat source, I believe that overall operating conditions will improve.

 

The law of Phisics support that the compressor efficiency will improve with a colder air sorce. For this reason alone it would seam to be a good idea to move the air draw to the coldest location possible.

We are talking about 100 degrees
This must result in some lowering of IATs. Wouldn't it??