Hey Guys,
There's been a discussion started in the Fujita Intake Review thread I created a few dyas ago but this information requires a new thread for the benefit of others that may not see it since it's not part of the original content.
It's been thought that the aluminum of the Fujita intake would become significantly hotter than our plastic stock intakes, thereby creating power loss. Being a scientist myself, this was too much to resist! So, I've started calculating temperatures and there's been some noteworthy findings so far:

 

Three key factors noted thus far:

• Coolant running through stock throttle body makes it a constant source of heat no matter which intake is used. Even cold air once it approaches this area will be warmed regardless of the metal versus plastic debate. To truly achieve the coldest air possible, the lines need to be removed and a shut off valve installed ala Motordyne.

• The aluminum tube of the Fujita was consistently cooler at the air sensor location or intake tract 1. Further, the metal cooled FAR faster after the heating period. I've seen this fact in the lab as well where I work. Plastic resists temperature better than metal at first but once hot or cold, it takes over three times as long to return to ambient. After both tests, I couldn't leave my hand on either intake for long as they were BOTH hot. But after ten minutes the Fujita was 22 degrees cooler while the stock plastic had cooled only 6 degrees and was still untouchable.

• The entire engine compartment is pretty warm. I find it hard to believe that there's enough of a difference in the density of oxygen in the temperature differentials between the stock and Fujita intake to claim that either one would more so suffer from heat soak or that there's a power loss. While the Fujita has proven to be an improvement in temperature and power thus far, I believe the big part of the test is yet to come: Will properly insulating the intake protect it from the engine compartment enough to drop the temperature closer to ambient.

 

Nice write up, wow impressive, I see a sticky coming!

 

Thanks for taking the time to do this research.

 

thats very interesting (and somewhat surprising) results how quickly it heats up approaching the t/b. I wouldn't figure the coolant would work that effectively!

why are the two factory tracts so much tighter in temp compared to the fujita? intake trac one with fugita is alot cooler than 2?

 

awesome review and testing!! very well done my friend!

 

Great question! That one bothered me as well. The answer seems to be based on the rapid cooling property of the aluminum and the stock fan. With the metal intake, when the fan kicks on the pipe cools faster which explains to me how intake tract 1, or the air flow sensor location, is cooler than tract two versus the stock pipe. Further, the passenger side uses the stock fan more efficiently. When it comes on, there is more room for the cooler air to get further back into the engine compartment.

Regardless though, I still think from a power persepective this is not enough of a reason to claim the Fujita a winner. Both are very hot and need help to get as close to ambient as possible.

 

This is interesting. Thanks.

 

we did a coolant by pass on the S2000's in order to stop the flow of coolant running through the tb. just removed the hoses and put rubber caps on.

 

Bump for the updated and finalized chart on the firsat post.

Bottom line, the wrap protects the intake tube from getting hot at first, but then once hot it retains heat just like the stock rubber making it less effective. As for the heat shield, a complete waste of time as it makes everything hotter and loses power.

Either the stock or Fujita is essentially the same temperature wise with a slight nod to the Fujita. The real solution though appears to be disconnecting the coolant from the throttle body during summer months. Anybody want to do the testing on this one?!

 

***Thanks for the tests...very interesting finds ***


Are we back to stock rubber accordion tubing FTMFL?

How many people gonna band wagon jump again?

 

What are the pros and cons? It had to have been there for some reason.

 

thank you very much for the great write up. Its great to know that aluminum pipes COOL DOWN FASTER THAN RUBBER. Now i know my butt dyno wasn't lying to me On a serious note, Computers don't lie....

I found out some very intersing findings today , we were testing the magden M1 computer today on my car and i took it out for a test run. You can data log info which is pretty neat to me. Its almost having your own mini dyno. OUTSIDE TEMP AT THE TIME OF TESTING WAS 78 DEG.

I idle'd the car for about 15 min while we were trying to configure the screen settings.

On my Nav Screen was: 6 data IN ORDER.

Air Fuel Ratio, COOLANT TEMP, INTAKE AIR TEMP, MAF OZ/SEC, TROTTLE POSITION.
ON IDLE: PLEASE NOTE THAT FIRST DATA FROM THE LEFT IS MILISECOND



msec O2 1:AFR ECT:F IAT:F MAF:OZ/SEC RTPS:%
0 14.699154
0 203
0 158
0 0.178134
0 1.149425
28 1.149425
28 14.667321
50 0.177781
85 1.149425


AFTER 79 SEC, A LITTLE OVER A MINUTE OF DRIVING HERE'S THE DATA

79166 109.400002
79178 0.570733
79199 6.145251
79210 29.382616
79232 0.60001
79242 6.70391
79267 29.382616
79274 181.399994

** NOTICE THE TEMPERATURE DROP FROM 158 IDLE TO 109.4 ***

AFTER ABOUT 181 SEC(3MINUTES) HERE'S THE DATA

181990 183.199997
182009 0.669853
182025 6.666667
182041 29.382616
182058 98.599998
182073 0.65927

** NOTICE THAT TEMPERATURE DROPPED AGAIN TO 98 DEG. ONCE I DROVE IT HARDER WITH THE TROTTLE POSITION AT 6.6 DEG **

BY THE TIME I PARKED THE CAR :

204230 183.199997
204257 0.210938
204290 1.111111
204310 15.145263
204326 105.799995

So in less than 4 minutes of driving, The Intakes actually cooled down at some points almost 60 deg. from 158 to 98 deg.


Once I get the final version of the Magden Computer M1 to play with, I will be doing some more test with Stock and other Aftermarket Intakes. I can't wait.

 

I was trying to cut and paste the data log but it didn't work. Since the file is only viewable via excel file, i cut and past the vital points to shorten them so i can attach the file. If you wan the full data email me a request

ampdmotorsport@yahoo.com

 

Excellent work.