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Title: Turbos. Draw-through or Blow-through? Discuss Post by: RUSS74GHIA on December 22, 2009, 00:33:03 am I'm planning a draw through using a T05 and a Holley750. I've seen this set up a few times and it would appear to be a reasonably easy set up to build.
But what are the pros/cons of such a system? Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: Martin Greaves on December 22, 2009, 00:37:23 am Oh dear Russ you gone and said it now.
Just you wait. ;D Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: james wotton on December 22, 2009, 09:52:25 am personaly i think a blow is better than a pull ain't that right martin, ;) ;D
Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: Neil Davies on December 22, 2009, 10:07:11 am I'm planning a draw through using a T05 and a Holley750. I've seen this set up a few times and it would appear to be a reasonably easy set up to build. But what are the pros/cons of such a system? Easy to build is the main pro, they do make decent power fairly easily. Disadvantage is that they aren't as flexible a system as a blow through. I built a pull-through for my car several years ago but didn't get the ignition right so it didn't work too well. I took it off then and gave up - i might have another go one day! I have no experience with a blow through system, just spoken to plenty of people who have! Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: The Reflex on December 22, 2009, 11:34:09 am personaly i think a blow is better than a pull ain't that right martin, ;) ;D :o Tut tut tut, keep it clean boys! ;) Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: Jesse Wens on December 22, 2009, 12:46:24 pm Since we run on propane we we're able to do a mix. The throttle valve is in blowthrough position but the venturi ( thing that meters gas) is mounted in the airfiltertube. We've got the response of a blowthrough with the simplicity of a drawthrough. The high octane number of gas is a pro too.
You'll probaby stick with petrol but i thought I'd share the info anyway. Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: JamieL on December 22, 2009, 14:02:54 pm blow-thru, single throttle body + efi
by the time you've mucked around with fuel pumps, MSD/Mallory CDi and carbs and jets and sh!t, you may as well go for what will work in all situations rather than something that will always being a compromise somewhere... Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: Martin on December 22, 2009, 14:07:58 pm blow-thru, single throttle body + efi by the time you've mucked around with fuel pumps, MSD/Mallory CDi and carbs and jets and sh!t, you may as well go for what will work in all situations rather than something that will always being a compromise somewhere... x2 In the long run its cheaper. and you'll have a system you can put on any future motor. Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: Tekken on December 22, 2009, 16:45:00 pm Street or drag engine?
Title: Re: Turbos. Draw-through or Blow-through? Discuss Post by: RUSS74GHIA on December 23, 2009, 00:11:24 am Street or drag engine? Drag ;DTitle: Re: Turbos. Draw-through or Blow-through? Discuss Post by: Turbo_Rich on December 23, 2009, 23:21:27 pm I was originally planning on running a 750 draw through on my bug. I think they can be made to work reasonably well and certainly be an easier option if you just want a simple drag race setup. One question i would be asking is if you can get the turbo carbon sealed to prevent fuel leaking into the journal bearings. Personally I would go with a blow through setup- you aren't restricted where the turbo would sit- you wouldn't need the turbo seal, they can be mapped more precisely and have more control than the draw through setup you can also run an intercooler/chargecooler to make the air more dense for more power.
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