GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: GTIcheeseman on 02 July 2012, 10:52
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as title says twin turbo golf any one made one that works ?
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yea 034 motorsport
http://www.motorgeek.com/viewtopic.php?f=19&t=35559
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heared of google?
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why does everyone say that, if everyone used google thered be no need for forums :/
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They exist on a v6 setup but not a straight 4. Considering the s4 was a v6 5v a cylinder twin k03 setup out the box.
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i was really wondering if anyone had done a mk4 golf tiwn turbo or if it was possible?
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not on the 4 cylinders, be pointless. on the 4mo and r32 its been done. Not cheap a good 15k set back but brilliant when done.
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yeah i keep seeing them twin turbo could it be done though on a 4 cylinder? twin k03 or k03s
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Can't see the point, a turbo for each two cylinders doesn't seem worthwhile, especially, when displacement would drop and so will engine pulses, plus a complex manifold followed by tight space. I did read about a scroller setup someone did in the USA, even then the results weren't any better than just a single big turbo setup.
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it was werth a thought
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It could work but all the power would shift up and I imagine spoolng would take longer. Just cheaper to buy the old s4, V6 and two k03 turbos to boot followed by haldex. :grin:
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f**k it then lol im just thinking of ideas its either do something big on my golf thats slightly mad, by a diesel mk4 and mod it a bit and have it as an all round dailey drive or buy a scooby a car i have want for years
dont know what to choose mad sensible or mad dream lol
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mad dream is what I would opt for.
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so a scooby then lol
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Yep, if its what you want and can afford. My mates got a TT RS now nearing a full race engine rebuild.
When I get my next house with a garage I want to build a space framed gt40 mk2. No point dreaming just get it if funds allow, last thing you want is regrets.
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yeah thats problem money and regretting i love the golf i think its really nice to drive but i just love the sound of a scooby
tbh i would like a prject car but i dunno what the hell id build lol
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so a scooby then lol
you must be mad if your considering buying a Subaru gearbox failures, engine failures, piss poor mpg, money pit.
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if i did id look around for a low miles one and i know they are piss poor mpg
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the only time I like the sound of unequal headers is on a bike :wink:
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IMO nothing beats the sound of a scooby with a big bore exhaust IMO
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Twin r32 anyone!!?
http://m.youtube.com/index?desktop_uri=%2F&gl=GB#/watch?v=mjgaxdl-z-g
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i love wathing that one haha
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my mate put equal length headers on his, made it sound normal lol
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noooooooo lol
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my mate put equal length headers on his, made it sound normal lol
i bet it spooled up about 500rpm quicker though!
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Yeah, it was that good that he binned it into a field a few weeks later :sad:
He had a feature in one of the last car & car conversions mags though
http://www.ebay.co.uk/itm/CCC-Cars-Car-Conversions-August-2002-Subaru-Impreza-/380447235538
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why does everyone say that, if everyone used google thered be no need for forums :/
totaly agree lol
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BMW 335i has 2 turbos one for each 3 cyl but now gone to twin scroll. New 3lt diesel going to have 3 separate turbos 380bhp with monster torque.
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why does everyone say that, if everyone used google thered be no need for forums :/
totaly agree lol
thanks lol
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Can't see the point, a turbo for each two cylinders doesn't seem worthwhile, especially, when displacement would drop and so will engine pulses, plus a complex manifold followed by tight space. I did read about a scroller setup someone did in the USA, even then the results weren't any better than just a single big turbo setup.
can someone just explain this to me... how would displacement drop? and engine pulses?
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Can't see the point, a turbo for each two cylinders doesn't seem worthwhile, especially, when displacement would drop and so will engine pulses, plus a complex manifold followed by tight space. I did read about a scroller setup someone did in the USA, even then the results weren't any better than just a single big turbo setup.
can someone just explain this to me... how would displacement drop? and engine pulses?
4 Cylinders, each time the exhaust valves open on that cylinder it sends the exhaust gases flying through at a higher speed, this is a pulse, imagine in a 4stroke the pulses are 180degrees apart. So 4 pulses every two rotations. These exhaust gases are what drive the turbo. Now imagine only two cylinders doing this. Even less gases pushing the turbine (imagine a pushbike where you was using bot feet to peddle, but now the person is using just one foot to peddle instead of two to drive the wheels).
Now you have an engine with 1800cc displacement pushing one turbo, if you have two turbo's in a parallel setup like you see in v6TT/v8TT engines you now end up with a setup where you have two turbo's for 900cc each, and you only have 900cc of displacement pushing each turbo at a less frequent rate in layman's terms.
Thats the theory, correct me if I'm wrong.
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sorry yes makes sence to me now. at first i thought you ment the actual displacement of the engine would be smaller, thats what was confusing me was thinking nor would still be a 1800cc :grin:
and engine pulses wise yes i get you now. :smiley:
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sequential turbos :wink:
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sequential turbos :wink:
Complicated, but the torque they produce early on :shocked:
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Think the Supra uses sequential?
(http://i68.photobucket.com/albums/i17/paulvolk/twinturbo_large.jpg)
Now that is complicated lol
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^ img / link not working
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Working here :lipsrsealed:
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(http://i68.photobucket.com/albums/i17/paulvolk/twinturbo_large.jpg)
Yup sequential
Hard to say whether sequential will ever take off... It's complicated and costly. Bigger engines with v6/v8+ will favor parallel setup. Then VAG are hooked on a similar idea, except it uses a supercharger and turbo, which you see in the current engines. Then more development is going slowly into electric cars :sick:
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Had a chat about the 2.3 supercharged merc c class... Their is an off ge shelf manifold fpr a garett turbo... Which allows for the chrger to stay in place. Thoery is the turbo outlet goes into the charger inlet.
Now the charger is driven off the engine, so does that means it would rev as fast as it boosts?
Be crazy if it did.
Anyway. S4 b5 for the win. Well Rs4 b5 for the epic win
Similar to a sequential, but bottlenecking as the supercharger is engaged continuously, which is acting restrictive in airflow as it maxes out and two its sapping power from engine. Ideally you want the supercharger to disconnect fully from the system in pipework and off the engine (via clutch, unless its an electric supercharger), which is what happens in the VAG engines and the air is then diverted/bypassing the supercharger completely and directly to the turbo until the charger is needed again.