Seth ZX12r UK
Expert Class
Posts: 238
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posted March 01, 2007 10:27 PM
Fuel pump?
Is it advisable to upgrade the fuel pump, when building a Big'N ?
I know the pumps were upgraded on the B models from the A's, do they have the capacity for a bigbore motor, whats the limit?
   
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sc57
Parking Attendant
Posts: 10
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posted March 02, 2007 01:38 AM
dunno whats recommended but we use a bosch unit that pumps through 70+psi, made it very difficult to map at low RPM ( we use it on a Road Race sidecar and if we're on the noise thats not an issue ) but we have 196 rear wheel HP , according to the dyno ,with not much work ( cam timing, slightly different profiles , and inlet port clean up)
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sc57
Parking Attendant
Posts: 10
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posted March 02, 2007 01:40 AM
Oh and our home built 4 into 1 exhaust with tapered headers ( no one makes them for sidecars )
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entropy
Moderator
Posts: 8671
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posted March 02, 2007 02:58 AM
 Edited By: entropy on 2 Mar 2007 02:59
Muzzy has a pump which has plenty of capacity for motor upgrades on the A's, dunno anything about the B's.
seth, remind me what you are building???
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Seth ZX12r UK
Expert Class
Posts: 238
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posted March 02, 2007 03:23 AM
Edited By: Seth ZX12r UK on 2 Mar 2007 03:24
quote:
Muzzy has a pump which has plenty of capacity for motor upgrades on the A's, dunno anything about the B's.
seth, remind me what you are building???
A Monster!
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Seth ZX12r UK
Expert Class
Posts: 238
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posted March 02, 2007 03:26 AM
quote:
dunno whats recommended but we use a bosch unit that pumps through 70+psi, made it very difficult to map at low RPM ( we use it on a Road Race sidecar and if we're on the noise thats not an issue ) but we have 196 rear wheel HP , according to the dyno ,with not much work ( cam timing, slightly different profiles , and inlet port clean up)
Thats some power from a stockish motor!
What do you put that, down to, your making bigbore power there.
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aliveagain
Needs a life
Posts: 5033
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posted March 02, 2007 03:48 AM
save yourself the money and just have some head work done and a piston kit install.
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I wondered why the baseball kept getting bigger. Then it hit me.
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Seth ZX12r UK
Expert Class
Posts: 238
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posted March 02, 2007 04:42 AM
quote:
save yourself the money and just have some head work done and a piston kit install.
Piston kit meaning bigbore? or high comp stock?
If thats what you did, what power you making?
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hyper12r
Expert Class
Posts: 119
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posted March 02, 2007 05:43 AM
is it advisable to upgrade to muzzy pump for my stock bore A1(full system,stacks,degree cams)???thanks
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Seth ZX12r UK
Expert Class
Posts: 238
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posted March 02, 2007 09:42 AM
Edited By: Seth ZX12r UK on 2 Mar 2007 09:48
quote:
dunno whats recommended but we use a bosch unit that pumps through 70+psi, made it very difficult to map at low RPM ( we use it on a Road Race sidecar and if we're on the noise thats not an issue ) but we have 196 rear wheel HP , according to the dyno ,with not much work ( cam timing, slightly different profiles , and inlet port clean up)
Bosch do some good pumps and valves, 70 psi is mad. 42-46 psi is standard.
Did you need a new regulator?
Do you not get problems with air in the fuel what with the return feed?
Can they be bought online?
How much?
have you got the model no.?
thanks
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osti33
Needs a job
Posts: 2973
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posted March 02, 2007 10:52 AM
If you are building a B model 12 the stock pump will support at least 300 horsepower. Any all motor B model bike will be fine with the stock pump.
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Seth ZX12r UK
Expert Class
Posts: 238
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posted March 02, 2007 11:04 AM
quote:
If you are building a B model 12 the stock pump will support at least 300 horsepower. Any all motor B model bike will be fine with the stock pump.
Excellent! 
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted March 02, 2007 11:45 AM
you can use a Walbro gss 342. http://www.bikeland.org/board/viewthread.php?FID=1&TID=20929&pagenumber=2
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Y2KZX12R
CompetitionCNC.com
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sc57
Parking Attendant
Posts: 10
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posted March 02, 2007 12:27 PM
Did you need a new regulator?
No
Do you not get problems with air in the fuel what with the return feed?
No but our tank is lower that the injectors if that makes a difference
Can they be bought online?
How much?
It was on the bike when I got it, so I don't know the price or availability
have you got the model no.?
I'll have a look when I get to the workshop
Note I would not use this set up if I was trying to ride on the road as it is pretty crap at low speed
I intend to fit a SARD regulator to reduce the pressure , but I'll do that when we're on the dyno next so we dont loose any power
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Seth ZX12r UK
Expert Class
Posts: 238
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posted March 03, 2007 07:52 AM
quote:
Did you need a new regulator?
No
Do you not get problems with air in the fuel what with the return feed?
No but our tank is lower that the injectors if that makes a difference
Can they be bought online?
How much?
It was on the bike when I got it, so I don't know the price or availability
have you got the model no.?
I'll have a look when I get to the workshop
Note I would not use this set up if I was trying to ride on the road as it is pretty crap at low speed
I intend to fit a SARD regulator to reduce the pressure , but I'll do that when we're on the dyno next so we dont loose any power
Cheers..
Where do you race your outfit?
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sc57
Parking Attendant
Posts: 10
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posted March 03, 2007 03:58 PM
Hi we're based in Melbourne Australia , we compete in the Aust Sidecar Champs as well as local club meetings, we get to ride at pretty well all the road race circuits in Aust including Phillip Island
Cheers
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Seth ZX12r UK
Expert Class
Posts: 238
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posted March 03, 2007 04:14 PM
quote:
Hi we're based in Melbourne Australia , we compete in the Aust Sidecar Champs as well as local club meetings, we get to ride at pretty well all the road race circuits in Aust including Phillip Island
Cheers
Philip Island is a quality track.
WSB Superbikes this weekend you going/been?
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