hooleyboy

I'm case you are wondering.. What does that button does? It is my new Supercharger bypass switch. It allows the supercharger to only be engaged under a set throttle position. So.. I can now drive at 65-70mph on the highway and not have to use my supercharger. it also eliminates supercharger back lash from the throttle body closing and the car still wanting to boost when i take my foot off the gas. This also help in conjunction or with my supercharger bypass valves too.

This button also allows me to have a "valet mode" of sorts. With the switch in the down position (as seen in the pic) the supercharger will never come on. The car makes a whopping 240whp with the blower off lol! It makes for a nice "screw you" to the parking attendants that are known for beating on cars.

A side effect of having this mod is my gas mileage as gone up ten fold. I only

Just add this to the list of strange mods i do.

mkonei

thats pretty slick mike. i thought you had a ten pounder in the trunk

jturkel

sign me up next Mike. Dyno-Comp, here i come!

by the way, Mike, I tried calling you. your mailbox is full. call me back. we need to talk

02C32guy

That's awesome. I know a lot of people have looked into doing this, but you're the first to actually go through with it. I'm not sure I'd be able to keep it off though...

hooleyboy

Not Nitrous for me. However we did use an NX relay to make it happen. It was actually quite easy to do as long as you toss out the lame directions that come with the kit.

You dont have to keep the SC off, but you do have that option. As long as the redlight is on you got SC power... It just now takes a slight and i mean very slight amount of foot pressure to engage the blower. Its perfect for 65mph or 75mph cruzin and not using a ton of gas.

with the way I race at the track (using a preload on the gas and brake) It will never effect me. Not to mention as soon as you would mash the gas the blower is boosting.

FrankW

so what's the avg mpg now with the charger off?

neat little mod.

hooleyboy

around 24mpg. for about 15mpg

FrankW

now that's impressive. lol

so back to the button...when it's on the "off" side the s/c will never engage? or it will engage under certain load? OR are you saying when the button is on "on" the s/c will engage under certain input? I was under the assumption that doing the amg s/c aftermarket you have the s/c clutch engaged all the time?

just want to make sure i read it right. lol

jturkel

when the button is in the OFF position, its off. period. regardless of load. when it is ON, the s/c will engage under a certain load.

mike tells me he can he even switch it on while in the middle of driving, whether while sitting at a light or while driving on the highway.

this is my next mod without a doubt, as, mike might spill out, it has some very nice cooling benefits as well

FrankW

cool. did a independent controller was needed since the charger is aftermarket? or did the C55 ECU was able to be programed to take the s/c into effect so that it tells it to engage?

let us know how that goes, but i'm not sure our V6 will make adequate power. you know how the i/c pump fail feels like. lol but if that can improve mpg to 28 on hwy, maybe it would be worth it.

jturkel

that part, i dont know frank. hooley will have to fill in that answer.

as far as feeling slow, yah no doubt it will be slow, but it would probably be sufficient for "normal" everyday driving, whatever THAT is.

when i do this, i'm not planning on doing it for all drives. just like, once i get up to speed on the highway going 75-80, turning off the s/c. and if mike jumps from 5 to 26, i bet we can see 30. i already see 23 or so going 70-75.

also, can be used in the staging lanes at the dragstrip. shut off the s/c, cools everything down a lot more (so i was told), almost to ambient apparently, and then flip the switch back on. instant power. apparently, you could even flip it on under WOT if you really wanted to, though i wouldnt do that lol.

hooleyboy

Its my understanding that under normal driving and low load on the engine the A/F is kinda lean on most cars. When you lay into the throttle thats when things start happening to the A/F.

On the last SC setup. My SC was on all the time and boosting. I installed some bypass/BOV's to the SC to reduce back lash when the throttle body is closed. So now as soon as I let off the gas the SC shuts off.

I used a Nitrous relay WOT switch and tricked it to think WOT was at like, say.... 10% load.

When we first installed it, the blower only came on under 100% load. I said "Thats not going to work for me" So some minor wiring adjustments were made to solve the problem.

Also my IC pump stays on regardless of the blower being on or off. When the car is not boosting, the air really gets a cooling. Then when I hammer on the gas it rams all that cooler un-boosted air down into the engine. Making for a some slightly lower IAT's under Compression. So the first surge of the SC seems stronger. Its almost like my blower isn't on long enough to make any extreme heat.

Dingleberry

this would be really interesting if a c32 could get high 20's mpg

jturkel

its doable. when i had my code3, i would hit 25-26 highway below 75. probably around 65. i wouldnt doubt it at all to see high 20s at all

Zeppelin

I do not think on the C32 you will see much if any improvement in MPG. The clutch is off below 2800-3000rpm at light loads anyway. I see no difference in gas mileage between 2700rpm and 3000rpm on the freeway and turning off the clutch when it is already off does nothing.

You can always unplug the clutch and take it for a drive to test it. When I did this the car was slow. It is hard to move air through the screws of the blower at the higher rpm's when they are not turning.

jturkel

i think it depends on speed. my highway speeds over here are between 75-85. For me gas mileage drops from 26 (at 60-65)to 21-22ish on the highway (75-85).

i personally would probably only use this for MPG purposes on the highway. i'm in it for the cooling

Quicktwinturbo

Cool stuff as usual~ way to go ~!!

walee112

thats crazy mileage!

JonMBZ

You should have made it a 3 way switch On/Auto/Off

hooleyboy

Before the install for finished we thought about that. I dont want it to effect my race times and have some sort of delay at the track. This week I'm going to be doing some launch testing to see if I am getting any unwanted delay. As far as i can feel now there is no delay.

MJ50

what's next? KERS button?

Dingleberry

That button needs a label on top.

I would like to vote for it to say this: "M3=LUNCH"

jturkel

haha....almost like his license plate? M3LOL

JonMBZ

vote for Turbo Boost like knight rider