SMIC vs FMIC

[CoopKill]

lol, beat me...

[IPD]

then there are aftermarket bumpers.

that's a cut 94-96. trust me.

i had to try

i'll be doing something along those lines with mine; only i hope to use a lip as well.

[MR2]

the loosing of the middle mouth of the car looks ok, I recon I'd go with those air channels that steal air from the center opening and route it around to the Side area myself

there are a lot of cars with bugger all front opening and they seem to cool just fine so I don't think the actual size of the front opening is that big of a deal.

the splitter I WOULD consider as useful...maybe even some sort of splitter equivelant just above the front opening too (as weird as that would be)

[mb7050]

that's a cut 94-96. trust me.

cut or not but i think it looks prety good

[DG]

It's not about air in, it is about air out.

Intercoolers work in two modes: you get the "heat sink" mode where the heat energy from the intake charge is used to heat up the metal structure of the intercooler, and you get the "heat exchanger" mode when the intercooler passes its heat to the air stream passing through it.

FMICs make great heat sinks, because they are large and massive. There's a lot of aluminum in the fins and tanks, and it takes a fair amount of heat to warm all that metal up. For short bursts of power, they work fantastic and they don't even need to be exposed to the free airstream to work.

But once they heat up, they suck at the heat exchanger mode for everything except idle. At idle, the rad fans pull air through them and that helps cool them down. Once you get moving, the air exit path is so crappy (doubly so if they aren't properly ducted and sealed, as 99% of them are not) that you don't get anywhere near the heat exchange that they could theoretically support, especially if they exhaust (as 99% of them do) into the engine water cooler opening.

And if it does exhaust into the water cooler opening, you impact engine cooling as well.

SMICs typically don't do as good a job as heat sinks, because they have less mass and so heat up faster. But they can have much better exhaust flow paths (dumping into the low pressure area in the wheel well) and so can function much better as heat exchangers - plus they don't poison the engine cooling air.

For a drag car, you run the biggest FMIC you can. For a street or road race car, you run the biggest SMICs you can, and you pay extra special care to exhaust ducting. And for bonus points, you run a water mist sprayer keyed to air outlet temps to try and stretch the heat sink mode through the use of latent heat of evaporation.

Mouth size makes almost no difference, as it takes only 1/3rd the area of the cooling surface area to feed enough air in - read up on duct design to see why.

DG

[MR2]

See told you.

what DOES help with regards to the air dam in front of your IC is the depth and size of the chamber...I'm told the larger the chamber the greater pressure it developes? also I imagine with some careful adjustments of how the air flows you could do quite a few good things to increase the pressure before the IC's...


funny how the FMIC Vs SMIC threads always get to 14+ pages!

[mb7050]

the looks man.

[mb7050]

, it is about air out.



Mouth size makes almost no difference, as it takes only 1/3rd the area of the cooling surface area to feed enough air in - read up on duct design to see why.

DG

allright then.

[mh3kgt]

That looks sweet Now I really can't decide between 97-99 conversion

[mb7050]

im dreaming