Anyone here got a super charger?
 

One of those big chrome bastards that sticks out the hood.

If so what compression is your motor at and how drivable is the setup?

from what I've seen it's always a good idea to go way low with the compression or you'll fuck up the motor. I work with Honda/Acura motors and when I've added boost of any kind I drop the compression to like 9:1 or so.

For N/A high compression is king. For boost the lower the better.
Drivability isn't really an issue till you get way up in the boost. I had a 27psi 1.8L B18 for about 3 years before any MAJOR problems. I had to change the oil about every 1200-1500 miles and always seemed to get oil leaks but it was way cool having it.

Wow 27psi sounds real high, Was that in a honda? I was talking more about muscle car era american v8s.

What kinda car did you run the 27psi in btw?

Honda Civics are the best to mod :)

well not ever supersharger comes out the bonnet i sold GM in Australia and every v6 calais has a supercharger.

My S2000 is running 11 psi on 11:1 compression

Ya I know but I was refering to the big old chrome things the stick 2 feet in the air :)

it was a 94 civic hatchback. it did about 10.8 in the quarter.

The next time I ran it I had installed a 100 shot of nos and fucking blew up about half way down the track.

8.5:1 on a 557 inch big block Ford. Car went 8:70's last year on D.O.T approved 10.5 inch tire.:glugglug

I got a garret t5 turbo.... does that count... 390hp to the ground

in what and where did you do it at... nhra rules state you have to have a 7pt cage and a fire system to race under 10 if I remember correct I don't race 1/4 mile I do road racing with scca

the car is certified for 7.99 and we go all over the country in Fun Ford Events, fully caged, fire supression and so on. Its a backhalf car but on 10.5 inch dot tire.

That rocks. What is it in ?

and POST A PIC :)

I got Turbo. No SC.

85 mustang and im not at my computer. Im at a buddys house who is clueless with html. leave an email or icq and ill throw ya some pics and video footage when im back home tomm.:glugglug

[email protected]
thanks man :)

:glugglug

Nothing beats the look of a chrome roots blower!

They are horrible inefficient though. (lots of heat)

Centrifugal all the way. It all stays under the hood, and you can intercool it. Basically a belt-driven intercooled turbo. http://www.procharger.com/

yes true in some sense of the word, but when its all said and done roots make the most power when you visit the far end of the spectrum.

What you mean by roots?

Really? I didn't know that.

From what I know, using an intercooler let's you run more boost.

Boost = power

roots blowers are what you are thinking of. The roots blowers house 2 rotors, in the case which is what you see out of the hood. These rotors are screw shaped and create boost, thus they create friction and from friction comes heat. And so on......

The typical "Supercharger" that sticks out of the hood.

http://thirdgen.org/techbb2/attachme...&postid=707559

Ya thats the one I like thanks

Exactly.
Who had one of those?

you obtain boost from both types of blowers, you are talking alond the lines of cooling the incoming aircharge which is more dense with oxygen and then combined with more compensating fuel, you effectively have a more efficient air/fuel mixture resulting in more power. True until you really step up in horsepower, due to many different variables you can use the heat a roots blower makes along with variable timing and fuel delivery to far exceed centrifigual blowers, but you are talking in excesses of 2000 hp:glugglug

Dude you are in the wrong biz :)

we build 75k engines for drag racers around the country, this is hobby and fun too.

check out BDS, blower drive service :)
http://www.blowerdriveservice.com/photo.htm

here's a sample..


http://www.blowerdriveservice.com/pcar23.jpg

Nice info! :D

Because heat = bad for forced induction, I've read that intercooled setups are the way to go. Because of the configuration of Roots blowers, they can't use an intercooler.

This makes a huge difference in power. With an intercooled blower, you can run much more boost without the threat of detonation.

More boost = more power from everything I've read.

Roots:

http://free.homegrownvideo.com/clips/larrysm.jpg

Centrifugal:

http://free.homegrownvideo.com/clips...-01-01%20b.jpg

yes this is all good info for the most part till you move way up in the horsepower range. Street driven or part time weekend warrior racers prefer the centrif's. Start moving way up the hp range and watch your centrifgual eat itself alive and spin bearings in the housing. BUT im talkin in excess of 2k hp

Dam you mean those hemi's with the dual distributors?
Why do they have 2 anyways?

please use the word hemi loosely:1orglaugh They are what is referred to as magnetos. 1 for each bank of cylinders. I dont want the dodge boys gettin all huffy even though Ford had used the hemi style cylinder head layout before dodge. Although they brought it to production first:glugglug

Thanks :thumbsup
Thats just the look I am after.


http://www.blowerdriveservice.com/pcar36.jpg

Bank means each side ?
So one for the left 4 and one for the right?


You trade motors for traffic ? LOL

I wasn't considering max HP situations.

So roots are better for extremely high HP situations then I take it? I didn't know that.

yes and NO:1orglaugh

ya for a guy on a budget and not lookin to make 2k+ hp centrif's are the way to go. All IHRA and NHRA fuel cars run roots. All monster trucks like bigfoot and gravedigger run roots.

LOL ok how much for a 1500hp motor that will run cool on pump gas?

it wont you need 5 bucks a gallon

Whats max hp your shop does on pump gas?

http://www.montygwilliams.com/

1200HP/1000TQ Twin Turbo SBC 427 Corvette.

Not 1,500 HP, but 1,200 on pump gas.

"the engine runs detonation free on 93 octane pump gas, idles smoothly at 800-850rpm, and pulls about 7" of vacuum at idle."

RPM....TQ......HP
4100...771.1...602.0
4200...768.5...614.6
4300...770.8...631.1
4400...777.7...651.5
4500...778.9...667.4
4600...788.4...690.5
4700...803.2...718.8
4800...821.7...751.0
4900...850.0...793.0
5000...874.8...832.8
5100...883.3...857.7
5200...901.7...892.8
5300...903.5...911.8
5400...927.2...953.3
5500...926.4...970.1
5600...945.3...1007.9
5700...946.6...1027.3
5800...960.4...1060.6
5900...963.2...1082.0
6000...970.2...1108.4
6100...964.2...1119.9
6200...956.0...1128.6
6300...952.6...1142.7
6400...937.2...1142.1
6500...922.7...1142.0
6600...916.1...1151.2

Im impressed the homegrown gang is into HP

ahhhhhhhhhhh the fastime crew, they fail to tell you on his website how many times the motor has eaten itself. Fasttimes is 20 minutes up the road from my house. Inside the drag racing circle they are known as "bad things happen to those who frank builds motors for":glugglug

YO Whats max hp your shop does on pump gas?
You sound like you know your shit I serious.

Cool, you know them?

I wouldn't expect a 1,200 HP engine to run too long myself.

I'd take 500 reliable HP, and a ton of traction over more HP anyday.

What kinda set up you have?

Please dont say m3 LOL

sorry, um what brand are we talkin about first off? And secondly we only build Fords and 99% of them are big blocks

ya it will last but not long on pump gas. A variation in oil pressure of 10lbs or more and its toast on the street in traffic and heat

I own a 1986 International Race Of Champions Camaro.

Bone stock, minus the transmission. (For now anyway...)