I'll explain why. Supercharged guys are limited by the rpm's the your blower is capable of. Our aftercooler setups are a way to cool the charge air with a minimal boost pressure loss. No, it's not as effective as a good intercooled setup (at least not the way the Vortech or Comptech setups are designed). However, we can't make as much HP with a FMIC due to the rpm limitation.

The problem is that FMIC's have a lot more volume to them. That increased volume needs to be pressurized to levels equaling the pressure before the FMIC. That means spinning the blower faster to make the same amount of HP made prior to the FMIC. That's why a lot of us are reluctant to switch to a FMIC setup.

 

From what I've seen, I don't think FMIC help most supercharger set ups until ~12-14psi. I could be wrong though, but I hear the aftercooler is more efficient on most set ups.

 

Are you going to be running a boost controller/wastegate? Honestly, I think for the money and time spent, it would be more worthwhile to just go with an EMS/Tune/injectors/etc and run ~12-14psi at redline. You're car will be substantially faster, and you'll still be pushing a far amount of boost starting around 3-4k rpms, and building to ~13psi at redline.

 

i dont see why everyone thinks it will increase the iat"s so much.... sure they may rise: but nothing compared to what a turbo sees, and thats why i have the intercooler, 2 psi loss isnt much, and im not going with ems injectors etc.. thats why i went supercharger in the first place simple bolt on, there are no tuners in my area....

 

i will be using the smaller pulley to get the low end power quicker then using a restrictor plate in the superchargers inlet to limit the cfm thus capping off the max psi. sure the charger will be overspun, but for what 5 seconds? and thats if im flooring through all gears, i just want some more low end.

its going to be a trial and error thing, but i know it will work, alot of corvette guys are doing this and so are some of the miata guys with thte rotrex kits, though i know that the rotrex spins way more rpms.

 

Yea I saw some Mustang articles with a lot of those guys doing this. I'm going to remove my wastegate next weekend and try to determine the PSI it's set to. I may just go ahead and order a 7psi spring, and a smaller pulley, and give this a shot.

 

im not sure about the wastegate working, i think theres been problems with it opening too much and venting all the boost, then closing and building boost then opening again, (chattering)... i would definetly try it though...
dont remove it just run the car and see if it opens.... what psi are you at now?
the point of the wastegate is only to get more low end out of the same boost.... if your planning on running high boost then its a waste as it wont do anything for you

 

a wastegate simply works by using a spring set for a certain psi, you hook up the vacuum line to it a it sends boost into the diaphram opening the valve and letting air out once the boost overcomes the spring pressure

the boost controller can be hooked up one of two ways: to reduce the amount of boost going into the diaphram or send more air into the top of the diaphram and act as a stiffer spring pushing the valve closed to your desired PSI

 

thers is most likely a 7psi spring in it thats usually whats those old gates come with i used to have one on my turbo prelude.

 

Damnit, I've been trying to keep quiet about the restrictor plate tricks. The beauty of that setup is that with the plate in place even if you're spinning the blower to its limits you will actually be putting less strain on the blower and your intake charge wont be nearly as hot as it would without the plate in place. Sounds weird but it's true.

A problem I'm sure you're going to run in to however is that since you're goint to disrupt the linearity of the power/boost curve I think you will find that the rising rate FPR is no longer adequate. You're going to force yourself into need a tune I'm afraid.