Mud-club
Chat & Social => The Bar - General Chat => Topic started by: strapping young lad on May 20, 2006, 22:30:29
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go have a butchers at my gallery (latest pictures uploaded)
a mazda rx7 has a turbo so big n heavy it has its own chassis mount and the other is nice n pink in an R34 skyline gt-r
both unfiltered and go like stink (saw them shift round castle combe today)
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Big turbo sounds like a recipe for big lag - are you sure that this is not more show than go! :wink:
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dunno but they take off like nobody's business and the dump valve can be heard from a fair distance
these are jap HKS turbos and cost an absolute fortune (i think one skyline has 1000bhp)
rx7 btw is rotary not piston so it probably works in a different way
looks mint though
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Turbo size directly effects lag.
theres a lot of tricks you can use to reduce it, running it underboosted is one and the same way Audi do it on mine.
Turbo Lag is the delay from the change in engine speed and shaft speed of the turbo, ergo lag from increase in speed to boost pressure. Smaller turbs mean less lag but less pressure, biggers ones mean more lag and more boost.
Superchargers however do not suffer lag ;) There are also dual/multistage systems that use two turbos to reduce lage and for big big bucks theres variable turbine geometry too :)
HKS gear you pary for the name. The only comapny you need to know about for turbos is Garrett :) The Expence comes when you realise (as I did) that your exhaust was never supposed to take that kind of punishment and bits melt.
Heres a Lotus V8 Giving it some :
(http://www.lotusespritworld.co.uk/images/V8/V8%20engine%20glowing.jpg)
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i dont have a turbo anymore and in my disco i never noticed the advantage so i couldnt say from experience but they look mint
oh and the engines dont leak oil ;)
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We have quite large turbo's onboard, the rotors are about two foot diamiter and the casing 6-8. Two of those on each of the four engines.
The big turbines are the two gas turbines though!
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or you could run full anti lag system like the rally boys use which keeps the turbo spinning at full speed during gear change so when you come back on power its there instantly, a lot of the cossie boys use anti lag systems to get mega horsepower.
when you watch any rallying and see the exhaust pop a flame its normally the unburnt fuel from the anti lag spinning at full speed then when the power comes back on bang unburnt fuel ignited big flame out of the exhaust.
hope i explained that right
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sounds bout right
a couple of skylines were flaming but one particular scooby was going so fast i couldnt pan fast enough to catch him on my phone! :shock:
good day out though, next one is in donington park in sept.
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or you could run full anti lag system like the rally boys use which keeps the turbo spinning at full speed during gear change so when you come back on power its there instantly, a lot of the cossie boys use anti lag systems to get mega horsepower.
when you watch any rallying and see the exhaust pop a flame its normally the unburnt fuel from the anti lag spinning at full speed then when the power comes back on bang unburnt fuel ignited big flame out of the exhaust.
hope i explained that right
yup
& change the turbo every 2nd event as it will make the turbo go pop
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Turbo size directly effects lag.
theres a lot of tricks you can use to reduce it, running it underboosted is one and the same way Audi do it on mine.
Turbo Lag is the delay from the change in engine speed and shaft speed of the turbo, ergo lag from increase in speed to boost pressure. Smaller turbs mean less lag but less pressure, biggers ones mean more lag and more boost.
Superchargers however do not suffer lag ;) There are also dual/multistage systems that use two turbos to reduce lage and for big big bucks theres variable turbine geometry too :)
HKS gear you pary for the name. The only comapny you need to know about for turbos is Garrett :) The Expence comes when you realise (as I did) that your exhaust was never supposed to take that kind of punishment and bits melt.
This is true, however superchargers have a leeching effect from the engine @ all revs, but particually at lower ones as they suck power through the drive system.
As for variable turbine geometry its pretty standard on modern cars, almost all diesels use it these days :)
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the supercharger was invented before the turbo charger :idea: