another way to do this is with a pair of I/C temp sensors (before and after the I/C, this is better than trying to figure it out on a dyno). I garantee you will find any decent I/C will do better than stock and most will have less pressure drop do to being able to flow more air.

As for the question that started this whole thread, yes most aftermarket I/C's will do better than a stock I/C's with a stock turbo.

 

ams97eclipsegxs , what are we looking at ?http://www.automotosports.com/images/FMICTEST.jpg
I see 19.9 hp gains but with what mods......

Thanks

 

Seems that they hit their bandwidth limit

 

Ah! Thanks, man. Hey AMS, can you attach that pic in this thread?

 

The car has.

HKS 272/272 Cams
S-AFC II
680's (at the time)
Walbro Pump
Full AMS Exhaust

Dyno before and after the addition of AMS FMIC. Basically it had our stages 1-3 done and then we added the FMIC. We retained the stock FMIC until stages 1-3 were completed and then did a test just on the FMIC.

 

I made nowhere near that much power installing my AMS FMIC.

 

This is exactly what i mean, and a few members have autocross with the Buschur unit and seen a improvement of less heatsoak over long runs. This can be ebated as well due to different variables in weather. Too many people get stuck on dyno sheets.

 

Noize because you have an Xede j/k.

 

I think it took me almost an hour to read this entire post and I'm not sure that I know anything more than when I started, but it has been a good read. I don't think a dyno will really test the benefits of a FMIC, I agree with DOM that it would be great to see some track times compared or consistent straightaway top speeds attained during racing conditions to see the full benefit of a larger FMIC. Even without proof from numbers it is intuitive that a well designed FMIC (like Buschur) will improve the overall intake air cooling efficiency, and thus give you a denser air charge in the combustion chamber. The odds of anyone ever doing a controlled test of FMIC's on a road course is about nil. My 2¢ FWIW.

 

You can say that again, Darkstar1

 

the bigger the intercooler the more area to put ice around (in drag racing) HAHHAA.

 

Im going to do another test on the BR fmic when our first shipment arrives. I really hope BR's kit changes my opinion of a fmic upgrade on the evo!

My drag test showed the spearco core performing no better than stock in COLD weather. My gut feeling is the head transfer efficiency of the spearco was LOWER than the stock core becuase the spearco had larger internal passages and less pressure drop. I feel the "small amount of air" going easily through that big core doesn't transfer heat as well as the better distributed stock core. The Spearco Ic was showing 10-15* higher temps than the stock ic at the same boost level and airflow with an abient temp advantage.

http://www.diamondstarmotorsport.com/evofmicparts.shtml
pictures on that page of the spearco core...that "noone knows what it looks like"

The results might be different in much warmer temperatures.
The results might be different on a turbo setup with a bigger airflow.

But at a cost of $650-$800 for intercooler upgrades for the evo, at MY modification level...I would be far better off putting that money twards cams. Im also planning on putting the BR440 turbo on with the stock IC, THEN changing the intercooler back to the BR and seeing the results.

Id just like to see when is the most effective time, budget wise, to do the fmic upgrade.

Note: this may all be different in summer weather.

Also note that Im ONLY interested in drag racing. I don't really care about how an upgraded ic performes on a roadcourse or any time frame more than 11-12 seconds. Im 110% with you guys in that a drag race situation does not stress the intercooler as much, and thus is not the be all end all of testing.

I would also think that a strait up dyno test would not be the be-all end all test as well becuase the temp rise is not that drastic as even a drag pass since your only running through 1 gear with less load.

my runs would start out within a few degree's of ambient temp ~50*F and rise to just about 100 with the stock ic. The spearco would see 115-120 at the end of 4th.

 

This is all I know...


Evo VIII BIG 16G Turbo Flows 550CFM's
The Stock Evo VIII can handle 600CFM's efficiently


They are matched well, I am sure you can heat soak it easier then a bigger one @ the Drag Strip.

And Again, getting a New Lower IC Pipe, I can almost Guarantee accounts for 10 of the 17 WHP the BR FMIC nets you. it would be interesting to see what it woudl make if you could somehow use stock piping, which is all but impossibel with the design.


I am sure teh BR unit is fine, but don't forget, it comes with a Better Lower IC pipe.

 

you also have to take into consideration larger turbos... you need more flow for bigger turbos.

 

Well, it's not impossible since BR has the new style FMIC out which uses stock piping...