alistairolsen
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| posted on 12/8/08 at 03:05 PM |
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quote:
Originally posted by coozer
properly setup ITBs will always beat individual choke carbs if both are tuned with the same in mind (power, economy, whatever)
a single Tb EFI system will always hammer a large single carb into the ground too.
Bike carbs are a cheap route to almost Tb like performance if you bin efi I agree, but then MS and bike Tb's is better still.
Oh, by the way, what is all that based on?
physics, you simply cannot achieve with carbs what you can with injection, in exactly the same way as you cannot achieve with a distributor what you
can achieve with mappable ignition.
incidentally before this turns into an argument, Im not talking peak figures.
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matt_claydon
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| posted on 12/8/08 at 06:38 PM |
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Carbs and TBs will generally get the same peak power. It what lies between idle and peak that differs.
Carbs have (usually) three jets that try to cope with all load situations. EFI (with a 12*12 fuel map) effectively has 144 jets, each one for a
slightly different load and speed condition. EFI also has the ability to modify the fuelling based on engine temperature, air temperature, etc. It
stands to reason it will give you a more optimal state of tune (but not more power, that is solely dependent on how much air you can get into the
engine, which carbs and TBs do equally well).
Why on earth anyone would ditch a modern turbocharged EFI setup for a set of N/A bike carbs I will never understand!
Are said above, carbs are to EFI what a dizzy is to mappable ignition. Old tech but cheap and easy to set up for those that don't want to
'tune by laptop'.
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alistairolsen
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| posted on 12/8/08 at 06:53 PM |
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exactly, you can get closer to optimum fuelling in all conditions with mappable, which means more area under your power curve, and better economy on
part load.
Id use bike carbs,but only for a budget project where I didnt have the funds for proper Tbs and management.
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Volvorsport
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| posted on 12/8/08 at 07:11 PM |
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if this engine is running , why dont we have video matt ?
www.dbsmotorsport.co.uk
getting dirty under a bus
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Volvorsport
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| posted on 12/8/08 at 07:20 PM |
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oh and ive found me engine wiring diagrams for the 4 cylinder redblock 5 and 6 cylinder whiteblock .
need an email address to to post it to .
www.dbsmotorsport.co.uk
getting dirty under a bus
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matt_claydon
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| posted on 13/8/08 at 04:48 PM |
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quote:
Originally posted by Volvorsport
if this engine is running , why dont we have video matt ?
Your wish is my command: http://locostbuilders.co.uk/viewthread.php?tid=95011&page=1#pid790874
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