Author Topic: Supercharged CB750 drag racer engine on Ebay  (Read 9237 times)

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Offline Phil

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« Last Edit: March 09, 2011, 02:10:41 AM by SamCB750A »

Offline Sam Green Racing

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #1 on: March 08, 2011, 09:07:33 AM »
It's H2Erics old motor that he posted a picture of recently.

Sam. ;)

Hey Buckers old chap, what did you do to the gearbox? made a right pigs ear of that one ;D ;D ;D ;D ;D

Sam. ;)

« Last Edit: March 08, 2011, 09:13:32 AM by SamCB750A »
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline JLeather

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #2 on: March 09, 2011, 04:20:46 AM »
Man, that is a badass looking setup.  Wonder if it could be at all streetable...

Offline H2Eric

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #3 on: March 09, 2011, 06:54:10 AM »
Hi y'all

Badass motor for sure or should I say was, as it will require some work and quite a few parts to get the thing going. No gearbox and no oil pump either. The original gearbox was a Pete Miller 3-speed, constructed form Jaguar (car) overdrive units - gear change by compressed air (100+ psi). The magneto that is also on offer is a Vertex one with all the advance / retard gubbins removed so that it can be laid over on its side and driven by means of a toothed belt. This also means it's fixed advance. The Hilborn jets (pills) that went with the setup have apparently gone AWOL and if the previous owner did nothing to it as seems highly likely it is still set up for an 80% nitromethane 20% methanol diet. No pulley on the supercharger, but I assume that Mr. Magnuson could supply another one as the company appears to be still in business, half inch pitch, 25mm bore according to the manual, which I've still got. Still got the original bill of sale for the blower as well. Blower was run at approximately 15% over engine speed if memory serves. See the listing for the condition of the crank cos it's damaged unless of course W. Fish Esq of Blackpool who acquired the bike from me changed it for the spare, but I very much doubt it. In which case the spare crank has gone AWOL as well. There was also an A4 sized folder with copies of the Magnuson manual, Hilborn injection set up and gearbox, perchace that has gone the same way.
G. Magnuson Esq. offered these blowers for street use using a drive off the clutch. Never never seen such a set up myself, but there is a picture of one for a Kawasaki 900 in the manual.
I'm afraid it does ever so slightly pi$$ me off to discover that my original bike has been neglected and broken up. I often wondered what had happened to it, now I know at least partly.
Whoever gets this motor I wish them the very best of luck and I will be only too happy to provided any further info or assistance I can, but I do hope they will give it a good home put it to good use.

Cheers
Eric
Honda CR750
Honda CB750K3
Kawasaki 750H2B
Suzuki GS750
Honda CB175
Honda CB350F
Yamaha R1

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Offline Sam Green Racing

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #4 on: March 09, 2011, 07:19:14 AM »
What's it worth Eric?

Sam. ;)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline H2Eric

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #5 on: March 09, 2011, 01:27:37 PM »
Just what somebody is prepared to pay for it.   ;D ;D ;D ;D
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Suzuki GS750
Honda CB175
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Yamaha R1

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Offline Sam Green Racing

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #6 on: March 09, 2011, 03:24:40 PM »
It's jumped from 6 bids at £230 to 13 and £485 in the past few hours. ::)

Sam. ;)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline MRieck

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #7 on: March 09, 2011, 05:21:25 PM »
It's jumped from 6 bids at £230 to 13 and £485 in the past few hours. ::)

Sam. ;)
Are you supposed to be on a plane or something?
Owner of the "Million Dollar CB"

Offline Sam Green Racing

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #8 on: March 09, 2011, 11:08:23 PM »
What's the rush Murphy? the rushing will start soon enough I hope. ::)
I'll be on my way by the time you read this.

Sam. ;)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Retro Rocket

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #9 on: March 09, 2011, 11:13:37 PM »
What's the rush Murphy? the rushing will start soon enough I hope. ::)
I'll be on my way by the time you read this.

Sam. ;)

Have a safe trip Sam.... ;)
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Offline Sam Green Racing

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #10 on: March 09, 2011, 11:33:12 PM »
Cheers Mick, just got to take a bath and finish packing.
Must go and put the lottery on for the next few weeks :D :D :D
On my way in 2 hours.

Sam. ;)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline H2Eric

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #11 on: March 10, 2011, 08:01:52 AM »
What's it worth Eric?

Sam. ;)

Looks like it's going to go for good money as it's up to £505 as I write this with a day and a bit to go. I won't be trying to but it back by the way, common sense has prevailed. For those interested the original price of the blower was $1400 which included the nose drive and fuel pump drive at either end, pulleys (22T & 25T) and drive belt, idler pulley (belt tensioning, for the use of), manifolds and the Hilborn fuel pump and injectors. There was also an extra bit for the for the plenum chamber which I bought separately at a slightly later date. The R. C. Golden  Rods were about 500, not sure if that was USD or pounds sterling. The top end of the motor (including the block) came out at about £300 second hand. I forget what the cost of the crankshaft was with its extension pieces at either end, but there was a spare one as well. The magneto was about £100. All prices at 1979 rates. So there you have it. Somebody is going to get a very good supercharger as its basically NOS, not quite as efficient as the modern screw type superchargers, but a gem non the less. They are also going to buy themselves a lot of work.
Cheers
Eric
Honda CR750
Honda CB750K3
Kawasaki 750H2B
Suzuki GS750
Honda CB175
Honda CB350F
Yamaha R1

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Offline H2Eric

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #12 on: March 10, 2011, 08:48:01 AM »
Just learned that the spare crank has been thrown away!!!!! Would you believe it. Seems the rest of the bike went the same way, probably in the skip. Lets hope what's left finds a better home.

Eric
Honda CR750
Honda CB750K3
Kawasaki 750H2B
Suzuki GS750
Honda CB175
Honda CB350F
Yamaha R1

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Offline BLUE71TURBO

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #13 on: March 10, 2011, 11:59:55 AM »
 Doesn't do any of us here in the states any good.   :(    Local pickup only.   :'(
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Offline Jim F

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #14 on: March 10, 2011, 12:47:05 PM »
we can get Sam to put it in the over head on his way over to the states
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Offline MasterChief750

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #15 on: March 10, 2011, 03:12:01 PM »
might be cheaper to ship it with the price of extra bags
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Offline Steel Dragon Performance

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #16 on: March 10, 2011, 04:54:08 PM »
Hey Eric, what time did that run?

Offline Sam Green Racing

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #17 on: March 10, 2011, 06:30:55 PM »
might be cheaper to ship it with the price of extra bags

Hey US Stig, ;D It's to late anyway, I'm here :D :D :D

Sam. ;)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Sam Green Racing

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #18 on: March 10, 2011, 06:37:38 PM »
Doesn't do any of us here in the states any good.   :(    Local pickup only.   :'(

He did say in Q&A that he would ship anywhere, so get yer bid in :D
Quite supprised there have een no bids in today, It's 2.35 am back home, I shoud have been in bed hours ago. :D :D :D

Sam. :D
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Big Jay

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #19 on: March 10, 2011, 09:44:06 PM »
Which Magnuson blower is that? 80 C.I. or the 110?

Offline H2Eric

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #20 on: March 11, 2011, 04:58:08 AM »
Which Magnuson blower is that? 80 C.I. or the 110?

80
Spoke to Paul the current vendor yesterday, he will ship anywhere at cost, so get your bids in folks.

Cheers
Eric
Honda CR750
Honda CB750K3
Kawasaki 750H2B
Suzuki GS750
Honda CB175
Honda CB350F
Yamaha R1

http://forums.sohc4.net/index.php/topic,94588.0.html

Growing old is mandatory, growing up is optional.

Offline wannaby

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #21 on: March 11, 2011, 04:52:23 PM »
I whant it .... dont know what ill do with it... mayby make a coffee table out of it.

Offline wannaby

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #22 on: March 11, 2011, 05:01:02 PM »
Anybody have any idea how the chopped off part of the tranny was sealed looks like the same procces as the old midget racer motors.....I am trying to collect picks of these older motors any help apreciated...Den

Offline Big Jay

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #23 on: March 11, 2011, 07:18:27 PM »
Probably the same way as the TQs

Offline wannaby

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Re: Supercharged CB750 drag racer engine on Ebay
« Reply #24 on: March 11, 2011, 07:51:59 PM »
Ya kinda figgered that BJ got any leads on pictures of cut down motors .I have scoured the TQ midget pages and noting out there ....guess it is because they were around before the net was .... must be lots of old motor picks hidden in dusty albums in basements or attics.D