Ok, thats what I thought. I figured all of the other stuff came into effect with the carb jetting and whatnot (I dont know much about carburettors)

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wildert Wrote:
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> For ITB's it's much easier to tune, since it
> implies that you some sort of programmable engine
> management solution available (or you at least
> should have :-)).
>
> So you really only need to find ITB's with an ID
> that suit the sort of peak power you are looking
> for. There's a lot of info on this from
> manufactureres of ITB's, etc. - but it's also not
> far off to just compare the peak power pr.
> cylinder for the bike.
>
> Displacement means nothing in that case, since you
> have 100% absolute tuneability from you EFI, thus
> stuff like engine characteristics and power band
> for the donor engine is irrelevant.

I'm not sure how the conversation got onto carbs.. but it did.

Still with the bike ITBs you still have to fab / cut an intake manifold and then get the spacing & linkage right then figure out how your going to connect them to the intake.. seems like 99% of the time that's accomplished with hose.

Changing the injectors may also be required.

Not a ridiculous amount of work, but still a fair amount.

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Andrew M
Onterrible
30ish

Yeah, that is true. I'm still debating on whether I want to deal with making a manifold, or if I just want to give in and buy a 20v ITB setup... which is ridiculous amounts of money for what you get.

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Sorry - I threw bike carbs in as a potential cheap and easy mod for guys running small displacement motors like your NSU...

Going with the bike ITB's with programable FI is definitely better in the end no doubt - but bang for the buck using bike carbs would be pretty darn high.

But my scenario only works well for small displacement car motors. Bigger engines with bike carbs would be a bugger to tune, and bike ITB's would be the best way to go I'd think.

Rabin

bean Wrote:
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> Sorry - I threw bike carbs in as a potential cheap
> and easy mod for guys running small displacement
> motors like your NSU...
>
> Going with the bike ITB's with programable FI is
> definitely better in the end no doubt - but bang
> for the buck using bike carbs would be pretty darn
> high.
>
> But my scenario only works well for small
> displacement car motors. Bigger engines with bike
> carbs would be a bugger to tune, and bike ITB's
> would be the best way to go I'd think.
>
> Rabin

I got that Rabin. It's just that the car is coming with dual carbs and there's a DCOE intake manifold available. So if I wanted to go carbs.. I'd likely go the 40 DCOE route as they seem to be by far the most common size, rightly sized for a 1litre banger, and pretty cheap.. but if I were to do anything, it seems going fuel injection is the best route. Maybe I'm wrong with that. I have certainly heard good things about bike and snowmobile carbs as development didn't end 40+ years ago!

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Andrew M
Onterrible
30ish

Dazed_Driver Wrote:
-------------------------------------------------------
> Yeah, that is true. I'm still debating on whether
> I want to deal with making a manifold, or if I
> just want to give in and buy a 20v ITB setup...
> which is ridiculous amounts of money for what you
> get.

Buy a full 20V with the ITBs then sell off the engine and keep the ITBs. Seems they're not all that much on ebay.

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Grant Hughes

Well, I have a small port head so I would have to get the small port -> big port adapter, then the big port to 20v itb adapter. Its all the OTHER stuff that add's up. Although, your idea isnt bad. I'm not sure any corolla guys would want to buy a 20v lately, though. Most '86 drivers are cheap asses, unless its shiny or some dumb japanese toy thing that hangs from your rear bumper.

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