Thread: I have got the COOLEST crossfire around ...
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Old Jul 19, 2015 | 08:54 PM
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waldig
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Joined: Feb 2008
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From: VA
Talking I have got the COOLEST crossfire around ...
When I designed the dual cold air inlet for ROB at Needswings, I did it to get more bottom end power and response. In testing I measured a 1 PSIG pressure drop on the road under WOT acceloration. THat was huge, like 7% power loss due to the lower air density of 13.7 versus the 14.7 PSIG.

The dual inlet allowed less restriction and the rest as they say is history, the DCAI was born.

Well that was the good side and my dyno charts showed real bottom end gain and like 25 - 35 Horsepower gains at the bottom, yeah

Fast forward several years, the design was not done as the intake are hot and that heats the inlet air, I even tried polishing the bottom to allow less radiation heating - nutz on that one.

Well there is a downside of the dcai, you have TWICE the exposed inlet piping and HALF the velocity in the pipe which is good to reduce frictional losses in the inlet air charge to the throttle body.

Well #2 the lower velocity allows more latent time for heating in the intake and thus the air temp is raised over the single inlet!!!!!!!!!!! BOOH. THe gain in air density is off set a bit by having hotter inlet air even with the air filter in front of the radiator.

To improve this I decided to test out an idea that is now proven. I used mylar thermal insulation to wrap the entire intet pipe. Stainless steel clamps serve to hold the aluminum tape and make a neat installation and YOU CAN DO IT EASILY in about 1 hour or so.

Today from 72 to 94 degrees on the road, I tested one side against the other to see the improvement over driving highway and city. The pipes were tested with thermal probes that were within 0.1 degree from matching readings. The photos show the setup and temp meter used for data recording. Some may recognize the meter as I used it to test my hood cooling design, super cooler design.

I got between 6 and almost 10 degree cooler temps on the driver side versus the passenger side in same car at the same time - a real test comparison.

THis is a gain and Ill go into more later, but it looks cool, runs cool and is low cost, enjoy and review the pictures. Wdy Enjoy


CrossfireForum.org - waldig's Album: cool dual intake design - Mark #2 - Picture

CrossfireForum.org - waldig's Album: cool dual intake design - Mark #2
 
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