carburettor draw through turbocharging

[gldgti]

as the name suggests, I am interested in the set up of draw through turbocharging. anyone had any experience with it?

please no responses along the lines of "why bother when this is better" and the like

[velly_16v_cab]

i ve seen setup like it on aircooled beetles...i dont have clue how they work tho lol

[abreut]

I have a mate that ran a draw through setup on a buggy with an aircooled beetle motor. It ran really well. He used an SU carby I think, the bike style ones with the slide throttle plate. He only had a small kkk turbo. It was easy enough to tune, he did have some serious icing up happening though especially when he hit the sand dunes. That thing would 3rd gear wheel-stand in the sand.

You obviously won't be able to intercool, my mate ended up running a water setup which worked off vacuum, the water was sucked in.

[Jarred]

yea, no intercooler, which generally limits the kind of boost you can push, and thus limits end numbers.

You can run a standard carby which is good, you don't need to get a carb pressurized, which can be a bit expensive.

You can move the carb around too, to place it slightly better, ie not about the exhaust.

[gldgti]

yeah, water injection is what i was thinking would be a good idea - it was all the rage back in the 30's and 40's... esp aircraft engines and superchargers.

[static1800]

A mate and his brother are into Sigma Turbos and one of theirs was a carby turbo I have another mate who used to have one also. They run alright from memory chew through fuel though.

[Jarred]

A mate and his brother are into Sigma Turbos and one of theirs was a carby turbo I have another mate who used to have one also. They run alright from memory chew through fuel though.

blow through or draw through?

And do you know what boost they we're running?

[static1800]

Carby was before the turbo, think they were running an SU from memory. My mates one went pretty damn hard.

[Jarred]

Carby was before the turbo, think they were running an SU from memory. My mates one went pretty damn hard.

That would be a draw through.

Alot of people knock these set ups. oh FI and stuff. In reality, for the street, these crude devices can be just as quick! and slightly cheaper possibly.

[DVR68U]

yeah i have had a drawthru setup on my beetle , just grab a good 1/3/4 or 2in SU and wack that in front of your turbo. im thinking about doing it to a mk1 ive got here atm , my bro and i have already sussed it out lol . you just need to make sure the fuel only has to go downwards and not back up anywhere or you can get fuel puddling and thats bad . also the most important thing is GET A TURBO THAT CAN BE CARBON SEALED!!!! with out a turbo that can run draw thru you will end up chewing thru the seals in about 200kms and then burning the most oil you have ever seem. i did this one with a turbo a guy tols me was carbon sealed but wasnt . looked like i was driving a steam train . totally crazy abouts of smoke, untill the engine couldnt handle the carbon build up and got bad detination from the hot carbon build up. any how it can be done and works well. get a few extra needles for the su so you can sand them down to suit the motor. if you got any more q's feel free to ask.
cheers brenton