Hey is there anything wrong with supercharging the stock motor? My buddy keeps telling me to just supercharge it rather than build the motor up. Not sure if I'd break something or what?
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Ýøüñg~Mèchãniç™
91 Mustang GT: BBK Cold Air Intake, BBK Ceramic Coated Shorty Headers, BBK Off Road H-Pipe, Flowmaster Cat-back, Msd Blaster Coil, Msd Dist. cap, Msd Wires, Pro 5.0 Shifter, A/C and Smog Delete, Steeda Adjustable Clutch cable, quadrant and firewall adjuster, summit rotors.
For what supercharging would cost I'd recommend building a great 331/347 stroker motor, don't skimp on the heads. Alternatively you might consider selling what you have and buying something else, lots of great modded cars being dumped in this economy.
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"Goose, Hollywood's fine, I want Viper"
1995 Mustang GT Cnv 347(427 stroker being built!) almost done!
1996 Cobra with Kenne Bell 2.1 Supercharger and every other conceivable part you can bolt on it...650hp upgrade in the works
2003 Infiniti M45 V8 340 hp...a methadone treatment for reformed Mustang drivers
Last edited by 2Manystangs; 1 Week Ago at 08:20 PM.
Reason: edit
Buddies sometimes over-simplify things. Mine were bugging me to "Chip" my '81 F-250 Ranger Camper Special. I am happy it came from the factory with electronic ignition.
Superchargers take a lot of power to drive so make the motor efficient in the first place and then add the supercharger. Here is my fear with forcing air into a stock motor. Lets say that the intake ports flow bad, we install the supercharger and we get awesome boost numbers but the power increase isn't what we were looking for, it may have even gotten worse than before (on a very poorly planned project). Why? Because the supercharger is pushing a lot of air at small port but some air is not getting through (=big boost numbers). A little bit more air gets into the cylinders than before making a little more power but not what we were expecting. However the supercharger is trying to push down a brick wall causing it to eat a lot of power (where some combos lose power after installing a supercharger). A column author in MM&FF was speaking about turbos and this is what stuck out in my mind, "Boost is essentially back pressure so the goal is to make a lot of power with no boost". In this situation we can substitute back pressure with parasitic power loss. Forced induction is a great way to make power but like anything we do to increase power, we have to make the whole system work together.
Superchargers take a lot of power to drive so make the motor efficient in the first place and then add the supercharger. Here is my fear with forcing air into a stock motor. Lets say that the intake ports flow bad, we install the supercharger and we get awesome boost numbers but the power increase isn't what we were looking for, it may have even gotten worse than before (on a very poorly planned project). Why? Because the supercharger is pushing a lot of air at small port but some air is not getting through (=big boost numbers). A little bit more air gets into the cylinders than before making a little more power but not what we were expecting. However the supercharger is trying to push down a brick wall causing it to eat a lot of power (where some combos lose power after installing a supercharger). A column author in MM&FF was speaking about turbos and this is what stuck out in my mind, "Boost is essentially back pressure so the goal is to make a lot of power with no boost". In this situation we can substitute back pressure with parasitic power loss. Forced induction is a great way to make power but like anything we do to increase power, we have to make the whole system work together.
So basically, Build the motor up a little bit for the supercharger rather than just throwing a supercharger on the stock components which are restrictive..
I gotcha, it makes sense. but my buddy, who by the way has 2 fox's that make well over 700rwhp, keeps suggesting I supercharge my stock motor so it'll drive like a stock car untill you get on it
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Ýøüñg~Mèchãniç™
91 Mustang GT: BBK Cold Air Intake, BBK Ceramic Coated Shorty Headers, BBK Off Road H-Pipe, Flowmaster Cat-back, Msd Blaster Coil, Msd Dist. cap, Msd Wires, Pro 5.0 Shifter, A/C and Smog Delete, Steeda Adjustable Clutch cable, quadrant and firewall adjuster, summit rotors.
Once I was talking to a cousin of a friend who swore that by putting on an intake manifold that was built for low RPM and swapping in a high RPM cam that he would have a motor that would be good for the entire RPM range. The fault with this thinking is that the intake is trying to deliver the air charge before the cam can use it and when the cam can use it the intake is gasping for air. BAD. I do not know if this mustang owner built his cars to have 700+ rwhp or if he bought them that way but at that power level my guess is that he is all-out race and not street. A well sized turbo or supercharger is streetable in a motor built for it anyways, it just gets better once you honk on bobo. This is why forced induction is more attractive than big cams and high compression, they produce the power and have the nice manners. A stock motor getting forced induction will be better than stock, but you can really maximize the performance with better intake, heads, cam and exhaust. There is another point about superchargers I mentioned but didn't really get into. The efficiency. One can create more power than before but lose efficiency. Confused? You will end up burning so much more fuel that yes, power will increase but your fuel consumption increases even more. I am not getting at fuel economy and saving the polar bears but what I do want to emphasize is that with the amount of energy (fuel) you may be pouring into this motor, by changing some components and doing some tuning (timing, AFR, not the Japanese tuning) your power could drastically increase. What you should see is a loss in fuel milage but an increase in efficiency. Are you confused again? The engine is using more air and needs fuel to go along with it but for the same amount of fuel as before (stock) you now get more power out of it. This is why car makers put superchargers on the xterra and the forestor (the ones that I know of) because of the increased efficiency, they can make the same power with less fuel. I personally think that they could do better with a turbo being they design from a blank sheet of paper but you and I have to work with what Ford did back in the 80's and 90's so we use superchargers because they are easier and don't have lag.
You needs mods first a SC will only add 70hp to a stock block you can achieve that w/ HCI for the same amount not have to worry about boosting issues. Build a better motor use your H&I then slap on an SC
screw it man SC it...
still 100 hp worth.. but if u want any more than that u gotta do real stuff.. liek change intake spring pressure.. timing stuff. real head gaskets.. cam for it.. exhaust..
but a stock motor can handle a super charger at mild boost levels.. take u from 215 hp range to 300ish..
that with a gear and tire and your moving pretty good.
get a sc kit for 1500 used if ya shop around..
I personally run a roots style on my 1990 cause no one seems to.. just to be a lil diff... lol. was 1500 used (but i converted to a carb)
it wont hurt anything, but you wont get the full performance of the supercharger with the restrictive H/C/I.
That's right. MM&FF used a base Vortech 5 psi supercharger on a 5.0 with uprgraded head, intake, and cam and got 8 psi out of it because of the better than stock air flow. I'd go with a H.C.I. upgrade first.
If you really want to supercharge first, Vortech and Paxton make base units that they say will give you 50 hp gains on a stock 5.0.
Once again, I reitierate that supercharging is expensive and puts a not modded engine under undue stress (you have forged pistons, but what about the rods?), your 700hp "friend" must have an oil well of money to build those cars..a great 331 stroker is really the best way to go, esp for a street car, you can easily have 400-500 rwhp for about $5000
__________________
"Goose, Hollywood's fine, I want Viper"
1995 Mustang GT Cnv 347(427 stroker being built!) almost done!
1996 Cobra with Kenne Bell 2.1 Supercharger and every other conceivable part you can bolt on it...650hp upgrade in the works
2003 Infiniti M45 V8 340 hp...a methadone treatment for reformed Mustang drivers
Supercharging the Stock 5.0 Motor. 
