Fmic
10-24-05, 11:38 AM
#1
To Live Is To Die
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Fmic
I've got a greddy 2-row front mount with a griffin aluminum radiator and i was wondering how exactly could i get more air-flow to the radiator. I know ducting would work but i don't know how exactly to do it, i've searched and seen some ducting but all were without a fmic.
10-24-05, 04:03 PM
#2
Fabricate a cover to seal off the area between the front bumper and the radiator. With the greddy front mount there is a decent sized gap there through which air will escape. If you have a stock bumper, eliminate the two black plastic flaps on either side of the main mouth opening if they are still there. On a friend's car we stacked a standard front lip and an r1 lip together. We then cut out the standard lip section where it fell under the main front mouth opening. This contraption was bolted to the bumper using some longer bolts. Esentially what you are creating is a duct that is about the length of the front opening and about 1.5 inches high. Bolt the undertray to the car (yes you need it, alot of air will go under the car and not through the radiator if you don't have one) We then got some thick foam weatherstripping and used it to seal the bottom of the radiator to the undertray. I did something a little different on my car with a 99 bumper. I spaced out the center portion of the front lip about 1.5 inches using some longer bolts and some aluminum tubing. I can post some pics of this later. Other than this you can always get an aftermarket bumper with a larger front opening, or get some of those struts that stretch open the stock opening. The point of my mod was to route air under the front mount and to the radiator. With this setup I had no problems road racing the car in the summer.
10-25-05, 04:43 PM
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Originally Posted by Rotary Experiment Seven
Fabricate a cover to seal off the area between the front bumper and the radiator. With the greddy front mount there is a decent sized gap there through which air will escape. If you have a stock bumper, eliminate the two black plastic flaps on either side of the main mouth opening if they are still there. On a friend's car we stacked a standard front lip and an r1 lip together. We then cut out the standard lip section where it fell under the main front mouth opening. This contraption was bolted to the bumper using some longer bolts. Esentially what you are creating is a duct that is about the length of the front opening and about 1.5 inches high. Bolt the undertray to the car (yes you need it, alot of air will go under the car and not through the radiator if you don't have one) We then got some thick foam weatherstripping and used it to seal the bottom of the radiator to the undertray. I did something a little different on my car with a 99 bumper. I spaced out the center portion of the front lip about 1.5 inches using some longer bolts and some aluminum tubing. I can post some pics of this later. Other than this you can always get an aftermarket bumper with a larger front opening, or get some of those struts that stretch open the stock opening. The point of my mod was to route air under the front mount and to the radiator. With this setup I had no problems road racing the car in the summer.
10-25-05, 05:48 PM
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Here are some pics of what Rotary Experiment Seven is talking about: http://www.carlisiworld.com/ccarlisi/myweb3/photo1.htm
Like he said, with a FMIC you really need to seal all the open space around the intercooler so that the air that is coming in through the nose actually goes through the radiator instead of over it and around it. Maxcooper has a couple of good photos if you need a visual.
https://www.rx7club.com/showthread.p...&highlight=r85
https://www.rx7club.com/attachment.p...chmentid=98116
Sealing/ducting the rad would especially help in low speed situations like stop and go traffic where the fans just recirculate the air under the hood and keep escalating temps. Air always takes the path of least resistance. With a FMIC you really need to have something forcing the radiator fans to pull air from outside the engine compartment to keep it running cool.
A vented hood would help more in a SMIC or VMIC setup. With the vents in the hood, it would just present an even easier path for the air to flow - over the radiator and right out the vent instead of through the radiator and out the bottom of the car. I had a vented hood on my last FD running a SMIC and I can't say that it helped all that much.
Like he said, with a FMIC you really need to seal all the open space around the intercooler so that the air that is coming in through the nose actually goes through the radiator instead of over it and around it. Maxcooper has a couple of good photos if you need a visual.
https://www.rx7club.com/showthread.p...&highlight=r85
https://www.rx7club.com/attachment.p...chmentid=98116
Sealing/ducting the rad would especially help in low speed situations like stop and go traffic where the fans just recirculate the air under the hood and keep escalating temps. Air always takes the path of least resistance. With a FMIC you really need to have something forcing the radiator fans to pull air from outside the engine compartment to keep it running cool.
A vented hood would help more in a SMIC or VMIC setup. With the vents in the hood, it would just present an even easier path for the air to flow - over the radiator and right out the vent instead of through the radiator and out the bottom of the car. I had a vented hood on my last FD running a SMIC and I can't say that it helped all that much.