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| Teflon-Mike |
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Teflon-Mike
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Joined: 01 Jun 2010
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| Pete. |
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Pete.
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 Posted: 17:32 - 01 Sep 2013  Post subject: |
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The carb tops are pressurised from the plenum same as normal. It's the float bowl breathers that are supposed to be pressurised with dynamic pressure from the up-pipe.
Don't know what the red pipes are, might be vac/pressure take-offs, but he could use the balancing barbs for that.
Plenum looks a bit small for blow-through. It'll work but not as well as if it was bigger, and a better shape than what he has. You want the airspeed in the plenum a lot lower than the up-pipe.
Twin-turbo, meh, I'm not knocking it if that's the way the owner want's to do things but there's no real advantage over one turbo for a bike engine. Any perceived gains in spool-up time are off-set by doubling the rotating mass, plus a small turbo is less efficient than a large one, makes less power for the boost and has higher intake temps.
EDIT: I see he also has uneven firing feeding the turbos, 1/2 and 3/4 should be 1/3 and 2/4 to keep the pulses even.
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a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good  |
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| RhynoCZ |
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RhynoCZ
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Posted: 20:09 - 01 Sep 2013  Post subject: |
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It is cool, but I don't like the chopper look, It's got to be a quite terrifying experience to ride it flat out with those mods. 
____________________
'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor |
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| Teflon-Mike |
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Teflon-Mike
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| Pete. |
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Pete.
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| Posted: 10:31 - 02 Sep 2013 Post subject: |
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A quick blast on my turbo bike would soon cure you of that Tef
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a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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| P. |
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P.
Red Rocket
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| Posted: 10:35 - 02 Sep 2013 Post subject: |
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| RhynoCZ |
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RhynoCZ
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| Posted: 11:32 - 02 Sep 2013 Post subject: |
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If the wheels are in the line, then I'd say it'd be alright. Slowing it down and cornering shall be the fun part. 
But that's me, I'd never even sit on anything from OCC and from others that call themselves a custom chopper shop. I like the part where someone from OCC rides the bike, it all flexes when he goes straight and says, the bike's great, very good handling  
____________________
'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor |
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| Clutchy |
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Clutchy
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| Teflon-Mike |
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Teflon-Mike
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| Pete. |
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Pete.
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| Posted: 18:25 - 02 Sep 2013 Post subject: |
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| P. |
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P.
Red Rocket
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| Posted: 18:38 - 02 Sep 2013 Post subject: |
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In a straight line, what can go wrong |
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| Pete. |
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Pete.
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| Posted: 19:04 - 02 Sep 2013 Post subject: |
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| Pete. |
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Pete.
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| Teflon-Mike |
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Teflon-Mike
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| Posted: 03:32 - 03 Sep 2013 Post subject: |
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| Pete. wrote: | A quick blast on my turbo bike would soon cure you of that Tef |
| Teflon-Mike wrote: | What, Mechanical Sympathy?  |
| Pete. wrote: | No - marvelling at the perverse reasoning behind it  |
Actually, there isn't so much perverse engineering reasoning behind a Turbo-Busa.
I mean, the Busa is about the fastest thing with two wheels money can buy.... SO, if that's what you want from a bike..... you buy a busa...and what do you do when that's not enough? Slap on a blower. Makes perfect sense!
On the other hand if YOU had a Yamaha Drag-Star....
Lets think about this..... it's a harley for folk that actually want to go places, not spend thier entire lives worrying about the state of their piles, tenitus and polishing stuff and replacing every sub-standard part the factory fitted with something from a catalogue, instead..... But... but... BUT! You don't buy one because you want a FAST motorcycle! You just don't!
So how do you get the idea.... "I wonder.... do you think that FJ1200 engine I just happen to have lying around will go in this?"
And then from THAT bit of perversity to, "Hmmm... I think this needs a Turbo.... no... actually... I THINK it probably needs a couple of them!"
It's the perversity of how many ways can you make it hard for yourself! I mean... it's not exactly following particularly logical engineering reasoning, is it?
Air-Cooled FJ1200, good solid lump to go for I suppose, BUT.... 125bhp out the box, its not got the most potential to begin with. GSXR1100? Offers more out the box, and you know that there's a whole industry churning out after-market tuning goodies for them, and when you get stuck, you can probably just buy a solution 'off-the-shelf'.
It's Dublin Directions; "Ah, will noo, Ah wuddun be wannin t'start frum 'here!"
You'd start with a ZZR1100 or a Bandit 12 engine or 'something'... NOT an old FJ12 lump and a Drag-Star chassis!
It IS in the tradition of Turbo's... that is after all the ONLY reason that Honda decided to Turbo a Maggot...... to prove they COULD! But you have to have a certain degree of mechanical masocism to do something like that! Or be German! Or worse, Swiss, I suppose.
Err... hold on... I think I need to go lie down.... I have just re-read my own post, and... yup... I think I just made a case to describe a Turbo busa as 'actually quite sensible' This cannot be so! A Honda CB500 is 'Sensible' a Pan Euro is 'sensible'... a GSX750 tea-pot is 'sensible'....
OK... compared to a Yamaha-Dragstar, with FJ1200 engine and a pair of turbo's.... a Turbo-Nitrouse Hyabusa ALMOST seems 'sensible'!
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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| newk |
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newk
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| newk |
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newk
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| lilredmachine |
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lilredmachine
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| newk |
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newk
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| Teflon-Mike |
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Teflon-Mike
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| Posted: 06:27 - 07 Nov 2013 Post subject: |
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| newk wrote: | the bloke u spoke to didn't build it ! |
My apologies... his obvious custodianship and quest for spanners merely implied!
| newk wrote: | bit of info about the bike, frame / swingarm home built, zxr 750 front end and rear wheel , tank / rear guard / side panels home made , bars / instroment cluster home made ,exhaust /turbo / plenum home made , all paintwork and polishing done by builder
the engine is stock and only running around 8psi of boost so very reliable , wasn't built for outright power just somat to catch the eye |
That's honestly home fabbed? By.... ?you?
That IS impressive. From the flow of panels and the bends and welds in the frame, I HONESTLY believed that it was a hot-rodded factory custom, not a scratch-build.
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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Old Thread Alert!
The last post was made 10 years, 166 days ago. Instead of replying here, would creating a new thread be more useful? |
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