dnmalc
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 posted on 5/1/06 at 06:18 PM |
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Throttle bodies or 40s
Guys
I will soon need to make the decision about what i fit to my 1600 pinto. the choice seems to be between 40 webers or 38mm throttle bodies. My basic
question about the throttle bodies is about there stability. Will i be forever having to balance them or are they low maintenance. What experience do
people have?
Thanks
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stevebubs
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| posted on 5/1/06 at 06:28 PM |
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Throttlebodies properly mounted will be just as stably balanced (if not more so) than twin 40s....
Only thing to come unbalanced in the ITBs would be the linkage...on the 40s, you'll have to worry able idle adjustment screws etc, too....
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dnmalc
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| posted on 5/1/06 at 06:39 PM |
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Thanks for the info. As the pinto is on standard cabs I assume that i will need to uprate the fuel pump and fit various sensors to ensure that the ECU
is able to do its stuff. Does the ECU need to be a from a car or can it be from the donor bike?
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cornishrob
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| posted on 5/1/06 at 07:01 PM |
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you would need an uprated fuel pump, for throttle bodies, this wouldn't be a problem. on carbs however the pressure of a fuel pump would
overcome them and force more fuel through than is desired, a seperate and suiting pressure regulator would be needed.
ECU, i would imagine a bike engine in a car with bike TB's would work ok with the bike ecu, however bike tb's on a different engine would
be a more complicated matter, stand alone management units are not that expensive for modest tuning.
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Marcus
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| posted on 5/1/06 at 07:59 PM |
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Don't forget to upgrade the fuel lines to cope with the extra pressure an injection fuel pump gives.
Marcus
Marcus
Because kits are for girls!!
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britishtrident
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| posted on 5/1/06 at 08:55 PM |
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Take a cold hard look at your power plant, fitting throttle bodies or DCOE Webers takes a combination of time and money.
I strongly suspect with a Pinto 1600 --- going either route is waste of build time and money considering more than half the effort required to fit a
Zetec or K series is sorting out the fuel injection and ignition.
If you don't want a Zetec fitting a 2 litre Pinto with a down draught weber would pay bigger dividends and be a lot easier.
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caber
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| posted on 5/1/06 at 10:02 PM |
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I am planning twin dcoe 40s on my 1600 Pinto. I am not interested in electronic fuel injection and I think the time spent on fitting and setting up
the webbers will be worth it. I am also planning to get a decent exhaust and looking for ideas at this end. There should be a fair bit of power
available from the 1600 with improved breathing and possibly a bit of porting. I am going this way for economy of build so far i have got two 1600s
for free so I can afford to muck about with bits !
Caber
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oliwb
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| posted on 5/1/06 at 10:28 PM |
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I would personally go for throttle bodies if you've got the money as you need new fuel lines (posssibly a different tank (with a return) prob 2
new pumps one low pressure one high, throttle bodies, injectors, ECU etc etc etc......People do do it quite cheap with megasquirt but I wouldn't
count on less than £500 - £600! Or my preffered route bike carbs....more economical than webbers, more power, better low down power, better response,
easiser to setup and don't need any fancy rolling road sessions every year to maintain....just a set of carbs (£25 on ebay) a bike fuel pump
(£15) and a home made manifold (as much as your willing to pay (£200 for a custom made one courtesy of MNR, shiny-bitz or bogg bros) or like you say
twin 40's.....only advantage I can think of is the nice sound they make on full sing.....Don't see that there's anything wrong with
a 1600 pinto is what I'm running (eventually)....don't let people put you off the 1.6....If you go EFI you can always pull it out and put
it onto a different engine....38mm would still be fine on a 2ltr Zetec for instance - maybe not as good as 40's but still better than the
standard setup! Just my opinion obviously....Oli.
If your not living life on the edge you're taking up too much room!
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jonno
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| posted on 5/1/06 at 10:31 PM |
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Using twin 40's on my 1.6 pinto at the moment its fine, but need more power !! so dropping a 2.0 pinto in soon  (cheap power upgrade)
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