Bike Carbs Vs ITB's

[SystemParanoia]

I have a general question, as ive just been browsing some engine porn on google


Bike Carbs



I know this is generally seen the cheaper option, with the bonus of not having to deal with any pesky electronic rubbish

but if you manager to fit this to a modern car ( after you fabricate the entire inlet system ) .. will it pass Emissions come MOT time?



Direct to Head ITB's



EXPENSIVE! even before you include everything needed, aftermarket ECU, new injectors, loom and RR time

for the cost of a set of these, you could probably turbo / supercharge the engine instead.

are they worth the extra expense over a bike carb setup?

[SystemParanoia]

should i take the silence as a no?

[B'stard Child]

I get the question but there isn't really an answer.....

If you have the budget for the whole shebang of TB's ECU and mapping why not

If you don't have the budget and are prepared to put a lot of effort into a bike carb conversion then do it.

There are limitations with carbs but in terms of peak bhp the diameter of the throttles is all that matters, driveability is a different story but you can make carbs (bike or tradition options) as driveable as a TB set up

I took a perfectly good injection and ECU set up



And converted it to carbs with an old fashioned distributor



No regrets - drove as good as an injection set up when properly set up

[MrBrightSi]

Nice carb conversion. I did the same with a 4pot engine, easy enough if you wish to invest the time. Same with the whole ITB vs bike argument.

[traffman]

I tend to prefer a lovely set on Jenvey throttle bodies.

[maniac0796]

I would say if you have the budget or ability to map an ECU well, then ITB's/fuel injection will produce more gains.

[SystemParanoia]

maniac0796 said:

I would say if you have the budget or ability to map an ECU well, then ITB's/fuel injection will produce more gains.

if i had to map an ECU ( as mr joe average ) id have to let professionals do it on a rolling road..

i guess that's 3 hours or so on a rolling road ?


carbs i guess you just get them jetted to the appropriate size and tune by ear?


some more modern engines dont seem to have a traditional Distributor cap any more so is it a case of retro fitting them or using a Ford EDIS8 ignition thing ?



that carb setup looks great.. what did you do for the intake manifold?

[B'stard Child]

SystemParanoia said:

that carb setup looks great.. what did you do for the intake manifold?

Manifold I picked up from Europe only one I'd ever seen



I could see how it was fabricated once I got it but it was done very well



I got the carbs and then built my own linkage system on a spare head I had





It was a heck of a lot easier to get everything right and line up outside the engine bay

Best thing I have ever done to the car

[Liquid Knight]

I don't know how well that V8 in the first entry would work. The float chambers are near verticle.

Planning to fit CBR carb's to my Cinquecento with a Panda 999 Fire distributor instead of all the ECU gubbins. Having a few issues with my welder at the moment so I may either have to make the manifold out of Steel or outsource the Aluminium welding part of it (at I cost I probably won't be able to afford).