Author Topic: Adapting a supercharger (Read 21074 times)

oldfett · « **on:** October 29, 2009, 10:27:23 pm »

I was just curious if anyone has ever tried to adapt a supercharger to fit on their inline 4's. Maybe something from another bike or a small supercharger from a car. Just curious as it seems superchargers for these bikes are nearly impossible to find! Who knows might even make a fun (probably never ending) project.

Sam Green Racing · « **Reply #1 on:** October 29, 2009, 10:42:25 pm »

Have a look in the hipo and racing forum.

Sam.

oldfett · « **Reply #2 on:** October 29, 2009, 10:50:38 pm »

I looked through the "Turbo Applications" thread while researching this and found 1 or 2 examples but not to much information or pictures to help me visualize.

turboguzzi · « **Reply #3 on:** October 30, 2009, 12:03:05 am »

a supercharger is usually regarded as a mechanical driven compressor, like the top fuel drag bikes use, not what you want i'd guess

try a search on just "turbo" and you'll get a ton of related threads

oldfett · « **Reply #4 on:** October 30, 2009, 01:13:17 am »

I know a supercharger is generally (the only kind I have seen) driven off the crank. I was under the impression that if you pick the correct kind of supercharger (such as a roots style supercharger) you can get boost quicker in the lower RPM range. Where as a turbo setup would have to be wound higher in the RPM range to see any significant boost. I love the looks, simplicity and overall design of the old Drouins but don't want to spend the next 5 years and multiple thousands of dollars buying an old, used and probably beat to hell supercharger. Maybe I'm completely off the mark here.

754 · « **Reply #5 on:** October 30, 2009, 08:11:57 am »

Try searching a bit in here, we discussed it a few times. I want to do one myself.

You can get a brand new Fageol for around 1200, a new Rotrex (looks like a turbo, but belt driven) for around 1500-2K. That is without drives & manifolds.

turboguzzi · « **Reply #6 on:** October 30, 2009, 10:43:55 am »

not a sohc but very nice project....

http://www.kompressor-guzzi.de/start.htm

H2Eric · « **Reply #7 on:** October 30, 2009, 02:33:59 pm »

I had a Magnuson supercharger years ago. Very nice piece of kit. Blew the engine to bits though, but the nitro helped in that respect. Magnuson did a full kit for a street CB750, but I haven't seen one for a long time, but they must still be out there somewhere.

Good luck
Eric

moham · « **Reply #8 on:** October 30, 2009, 07:52:02 pm »

Hasnt carpy posted pics/info of his supercharged Copper colored 750 on here somewhere? Project forum perhaps? It was carpy, wasn't it?

754 · « **Reply #9 on:** October 30, 2009, 08:05:49 pm »

Carpy had a Drouin..

ever find a Drouin in good shape?
ever hear of one that made 20,00 miles..?

I never have......
and I remember back when they were still made, and people that had NEW ones, trying to get parts to either complete them, or keep them working..

....................................................................................

Magnacharger, I would give my left nut for one of them, about the only thing left that I desire for my 750 that I never had..YET..
edit the M Reick barrels and the Magnacharger.. and another set of 12 spoke Americans...

fishhead · « **Reply #10 on:** October 31, 2009, 05:41:44 am »

I beleive Randakk used a Fageol on his GL 1000.

http://www.randakks.com/Randakk%20Supercharger%20Kit.htm

Heres a pic of a Drouin I found on the net somwhere.

Bill/BentON Racing · « **Reply #11 on:** October 31, 2009, 06:20:13 am »

I had a Drouin S/C on my first 750 ,1975 model bought new that year,put s/c on in 77,it took a LOT of time to get right,problems w/belt running true,one off crank was cogged,ran fine,other belt not so easy,not cogged,hard to get roller alignment straight,belt liked to creep,unless in perfect alignment,looked like Carpy's had fixed this,also fuel delivery,flat slide,either too lean on one end or too rich on other or vice versa,and had to have dual cbl set up,forced air would push slide against body and you better have positive return!Once sorted out,a real hoot,would outrun stock Z1-R,ran high 7's,low 8's in 1/8 mile.Had RC pipe,Barnett clutch,struts,drilled disc,lighter fenders,etc.,I'll try and find a pic.Outran my buddy's Z1-R(local Kaw tech,I was @ Honda shop) that first week Z1-R came out)beat him by .03,was pleased as Jay Gleason & Cycle tested Z1-r and was first production Japanese in line 4 in the 11's,ran a 11.95.If I remember right on that run ,I ran a 8.00 to his 8.03.Never got in the 7's that day.Bill

Bill/BentON Racing · « **Reply #12 on:** November 06, 2009, 01:31:19 pm »

Hey I talk that way too!!!

,,OK,obviously not an English major,Do I win a T/shirt for most comma's?

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,Bill

Randakk · « **Reply #13 on:** November 24, 2011, 02:25:11 pm »

Quote from: fishhead on October 31, 2009, 05:41:44 am

I believe Randakk used a Fageol on his GL 1000.

Heres a pic of a Drouin I found on the net somwhere.

And I'm currently building a supercharged CBX. Build details are on my Facebook page.

This will be another "old school" carbureted, draw-through with Rootes type blower similar to my supercharged GL1000.

The drive is very unusual. Since the CBX engine is already very wide, I'm NOT driving the blower off the crank.

Randakk

Gearheadgreg · « **Reply #14 on:** November 24, 2011, 06:49:45 pm »

8 years and 22.000 miles on this GL1500 Magnacharger M45 Eaton Supercharger, 100.000 mile warranty by Magnacharger. The CBX is air cooled like the CB 750, not sure you could keep the cylinder temps down on long distant trips without heat problems, The GL Goldwing motors are water cooled with water jackets around cylinders and heads. But if you are drag racing or just wanting to spend money you will NOT be disappointed with a Blower, Tuning is critical and a challenge, Ignition will need timing Retard and so on..But i still get a smile every time i twist the throttle, I have done 500 mile days 2 up on trips around the country, and dependable as factory could make it.

23tbucket · « **Reply #15 on:** November 25, 2011, 09:26:59 am »

Supercharged SOHC 750 ?...you betcha!!! 1977 CB 750A...all internally stock.....

This is the positive "rootes" type supercharger I used...."Aisen" 500 cc per rev...running crankshaft speed 1:1

Ive got a 1983 CB750 that is turbocharged and fuel injected as well. Both bikes behave "normally"....until you twist the throttle. I prefer the supercharged bike over the turbocharged. The turbo doesn't do much until you hit 3000 -3500 rpm....then it's like getting kicked in the backside. The supercharged bike has it's power right there...right now....way more controllable. I run out of balls before road on either one!!!!

Ah..what the heck..here is the other one: ....

There isn't really that much cost involved in a "do-it-yourself" supercharged or turbocharged project.....just lots of thinking ahead and...time!!

AbbyRider · « **Reply #16 on:** November 25, 2011, 09:33:19 am »

My balls just tucked themselves up towards my stomach just seeing these bikes.

cb750rat · « **Reply #17 on:** November 25, 2011, 12:11:46 pm »

I would say check out Carpy at cb750cafe.com. I saw one cafe racer he had supercharged....pretty sweet!

jaguar · « **Reply #18 on:** November 26, 2011, 05:14:38 pm »

Ricky racer here has a pair of super durins....still mad he beat me to one...lol

I understand that it was bad bearing tech that made things go boom.
I really want to run forced induction on a bike some day...

Ricky_Racer · « **Reply #19 on:** November 26, 2011, 05:35:52 pm »

Quote from: jaguar on November 26, 2011, 05:14:38 pm

Ricky racer here has a pair of super durins....still mad he beat me to one...lol

I understand that it was bad bearing tech that made things go boom.
I really want to run forced induction on a bike some day...

Using new style high-speed (or ceramic) bearings is the key to longevity on these old huffers, Jag. But DAYUM those bearings are fracking expensive! RR

kerryb · « **Reply #20 on:** November 26, 2011, 08:35:55 pm »

...wow, now we know what the guys who don't go on to NASA, do in their hobby hours. (or maybe these are the NASA guys in their free time)

Still...WOW!

grcamna2 · « **Reply #21 on:** November 26, 2011, 08:54:27 pm »

Those are some REAL modded out fine tuned looking Hondas ! CUSTOM.

jaguar · « **Reply #22 on:** November 27, 2011, 08:47:56 am »

The 1800cc SC yamaha is VERY weak
Lots of broken superchargers this year....

Randakk · « **Reply #23 on:** November 28, 2011, 06:52:18 am »

Quote from: Gearheadgreg on November 24, 2011, 06:49:45 pm

SNIP...The CBX is air cooled like the CB 750, not sure you could keep the cylinder temps down on long distant trips without heat problems, The GL Goldwing motors are water cooled with water jackets around cylinders and heads. But if you are drag racing or just wanting to spend money you will NOT be disappointed with a Blower, Tuning is critical and a challenge, Ignition will need timing Retard and so on..SNIP

Not my first blower build. I understand the tuning issues pretty well

Here's the supercharged GL1000 I built (on the road since 2007):

and here's a YouTube video of that bike:

Supercharged '75 Honda GL1000 by Randakk (with Fageol Blower)

The CBX blower project is actually easier in some ways. Hundreds of Turbo CBXs have been built. Turbo bikes generally have more heat issues to deal with compared to a supercharged bike. On the CBX, the thermal issues (and solutions resolved on turbo bikes) are well understood. Ditto for the necessary timing mods.

Gearheadgreg · « **Reply #24 on:** November 28, 2011, 01:35:46 pm »

Sweeet GL 1000!!! Randakk, and 23tbucket your Blown injected Chopper is the Kine!! Keep those pictures going guys!

News:

Author Topic: Adapting a supercharger (Read 21074 times)