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Using a dellorto carb.


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#1 lee 8v

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Posted 04 October 2006 - 01:03 PM

Hi guys

Just joined this forum after browsing through it for information on using a weber/dellorto carb instead of the standard SU on turbo engines.

I have recently brought a mayfair with an Mg engine (non turbo) but have all the aprts for a turbo conversion from a previously owned MG turbo 5 years ago. Unfortunatly i no longer have the carb of plenumn chamber.

The engine i have started building for this engine is a Avonbar 1380cc phase 2 turbo unit, running 12psi boost. But after speaking to them they say i can't use the dellorto carbs.

I don't understand this as lotus have used them , so has Janspeed to create the first turbo metro pre rover conversion.

Anybody on here no why and has anyone actullay got a unit up and running using this setup. obviously it will need to be rolling roaded

Look forward to your replys

Cheers Lee

#2 mini93

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Posted 04 October 2006 - 03:47 PM

the problems with using delloro is somthing to do with the pressure that the turbo creates i think it doesnt draw the air out or soething to get round this you could make in inclosure for the whole of the carb (carbinside box this way the card would be pressureised all around it not causing problems, im sure another guy will clear things over for u soon ehough

#3 Turbo Phil

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Posted 04 October 2006 - 05:48 PM

It's certainly possible to use the Dellorto as Janspeed and Lotus did. These carb were specially sealed though so they could be used in a blow through application.
I would have thought i should still be possible to get a seal kit for these carbs & then adapt your current N/A one for Turbo use.

Phil. ;D

#4 ed4ran

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Posted 04 October 2006 - 06:11 PM

Yep seal kits still available at £70 to do 2 carbs, as theyare in pairs anyway.

Posted Image

Edited by ed4ran, 04 October 2006 - 06:11 PM.


#5 lee 8v

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Posted 04 October 2006 - 07:08 PM

Yep seal kits still available at £70 to do 2 carbs, as theyare in pairs anyway.

Posted Image




I have seen these recently. So if i buy the seal kits they will come with all parts to convert these carbs.

Who,s are those nice lotus carbs????

Phil have used you janspeed engine or is it in storage / sold on.

Edited by lee 8v, 04 October 2006 - 07:09 PM.


#6 Turbo Phil

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Posted 04 October 2006 - 09:17 PM

Phil have used you janspeed engine or is it in storage / sold on.



It's currently in storage, awaiting restoration ! Lol. ;D

Phil.

#7 mini93

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Posted 04 October 2006 - 09:28 PM

i think thats possibly a hint phil? is the janspeed still a blowthough system?

#8 ed4ran

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Posted 04 October 2006 - 09:53 PM

I have seen these recently. So if i buy the seal kits they will come with all parts to convert these carbs.

Who,s are those nice lotus carbs????


The seal kit if for the lotus carbs, so im not sure if they can be used for converting standard ones, i guess you could use all the seals and stuff, but i think you'd have to modify the shafts so they can be sealed.

The ones in the pic are mine, and are the 45M version.

#9 Turbo Phil

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Posted 05 October 2006 - 07:26 AM

i think thats possibly a hint phil? is the janspeed still a blowthough system?


Yep, it's blow through. They don't need to be sealed for a suck through system, as the carb is operating in a normal way, ie, under vacuum.


I have seen these recently. So if i buy the seal kits they will come with all parts to convert these carbs.

Who,s are those nice lotus carbs????


The seal kit if for the lotus carbs, so im not sure if they can be used for converting standard ones, i guess you could use all the seals and stuff, but i think you'd have to modify the shafts so they can be sealed.

The ones in the pic are mine, and are the 45M version.


Yes, there would probably be some machining involved, but i'm sure it'd be possible.

Phil. ;D

#10 lee 8v

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Posted 05 October 2006 - 06:21 PM

thanks guys for the help,

I have had a look at the lotus espirit site and dellorto, The turbo carb is different internally as weel as being sealed, but they can take 30psi without mods thats some serious power, don,t think i would like to try that on an A serious.

I have found some on ebay that are turbo carbs. But will need a rebuild. Will have to make more enquires mainly with rolling road tuners etc, or people who are familiar with these carb setup, Ie Lotus.

If you were to sell your engine what would you want for it.?

#11 ed4ran

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Posted 05 October 2006 - 10:11 PM

money :w00t: :D

#12 lee 8v

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Posted 07 October 2006 - 06:53 PM

I think i might have a look at a suck through system, like vmax scart use on there supercharger conversion.

This may then get over the su and dellorto problem.

Does anyone know any one with a suck through system.

Sorry for all the questions, but getting close to sorting out the engine, and don;t realy want to pay 300.00 for a new su turbo carb.

#13 ed4ran

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Posted 08 October 2006 - 07:07 PM

why not get a second hand one? and rebuild it if its a bit tatty, that would be your best option and it would all bolt on!! :D

#14 Yeti

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Posted 09 October 2006 - 06:12 PM

Okay, this may count as threadjacking (is that the term.... makes me think of pirates! Gaarrr!) anyway


If you used a carb though a suck though system, how would you plump in an intercooler? just to keep the heat down etc...... could you put it before the carb?




Yeti



hmmmm I wish i was a pirate now GARRR!!!!!

#15 ed4ran

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Posted 09 October 2006 - 07:34 PM

I think you'd probably get problems from the fuel puddling in the intercooler and not reaching the engine!

I cant see a point for a draw through setup when you can get stuff that works and fits!! All you have to do is bolt on. :proud: and they aint that much now-a-days even if its all slowly getting rarer.




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