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Location:
Melbourne
Registered:
May 2002
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 Turbo Rundown Q'z
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Tue, 10 February 2004 23:42
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Hey all,
its got to the point now where i'm looking at upgrading my current TT setup on my jza70, an i need to know tech stuff about turbos in order to choose the right option, SO:
Garrett turbo, front AR .42 Rear AR .48 (turbo FS by JapPerParts)
AR? some rating of air flow? or compression? whats AR stand for and whats the numbers equate to in real world?
also any one know of a web site that has some/most turbos and there max HP flow or output. how do i find/work out how soon a turbo will kick in? used to the almost lag free TT setup of the 1j now and i'd like some bigger numbers with minimal gain to lag.
been thinking also why the F&%$ i dont just get an exhaust mani custom made? any reasons? custom headers arn't really that expensive, so is there another reason? better internal flow? hold pressure better? ect? will it need blue printing? are the stock mani's even flowed or blue printed?
And if i do go custom setup i would like to go Twin again (similar to the current setup, ie parallel) if room permits, what turbos should i be looking at that can get 350 rwkw easily? and with least lag?
i hope u can excuse the stupidity contained above and just dish out straight answers for me.
also anyone with any experince with a perticular turbo is more the welcome to comment on its effectiveness, ect!
THANX!
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Location:
Melbourne
Registered:
May 2002
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Re: Turbo Rundown Q'z
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Wed, 11 February 2004 10:43
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anyone? lots of traffic an still no help!
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I supported Toymods
Location:
melbourne
Registered:
June 2002
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Re: Turbo Rundown Q'z
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Wed, 11 February 2004 11:07
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A/R ratio is the ration of the area of the compressor outlet at a certaoin point to the radius fro the centre of the turbine/compressor shaft to the centre of this point. it is not a measurement of size in any way, as it is a dimensionless ratio.
it gives you some idea of the behavior of the turbo.
do a search to see what people have used in the past.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Turbo Rundown Q'z
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Wed, 11 February 2004 12:29
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A/R = area-to-radius, pretty much as explained above.
The stocky 1JZ manifolds are kind of hard to work with, due to being VERY compact. You look at the size of them, and you'll be horrified, however, they don't work anywhere NEARLY as bad as they look like they do. A custom manifold will likely be necessary, though, as will a fuel system upgrade, new ECU, decent cooler, etc. I'm presuming you've already budgeted for these  As for what turbo to use, if you can afford to, use either a single, or a pair, of Garret GT's. Otherwise, you'll want a pair of something reasonable second hand, and that'll be where it gets a bit hard. You need something smallish in the exhaust, non-ceramic, and reasonably efficient. It's a good challenge Otherwise, you could try a replacement Falcon turbo, I'd believe that with the RIGHT manifold, it could work better than a lot of people will tell you..
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Location:
Melbourne
Registered:
May 2002
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Re: Turbo Rundown Q'z
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Wed, 11 February 2004 15:06
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| shinybluesteel wrote on Wed, 11 February 2004 22:07 |
A/R ratio is the ration of the area of the compressor outlet at a certaoin point to the radius fro the centre of the turbine/compressor shaft to the centre of this point. it is not a measurement of size in any way, as it is a dimensionless ratio.
it gives you some idea of the behavior of the turbo.
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SO if i get this right cos its late, it is the ratio between, compressor outlet area(connection point to IC piping/intake) to the radius of the turbo axis to the point taken for the compressor outlet? yeah? Now this is taken from the biggest compressor outlet area point? the median or smallest? it OB make a big dif at which point
also the closer the AR is to 1 the quicker it would spool to full boost?
thanx!
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Location:
Perth
Registered:
October 2002
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Re: Turbo Rundown Q'z
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Thu, 12 February 2004 05:32
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Has anyone looked into using T28s (either stock, N1 or hi-po after-market) for a GTR? With a smaller exhaust housing to suit a twin-turbo 2.6l motor, I would have tough these would be a nice budget power upgrade. Is there a reason why this hasn't already been done?
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Location:
Melbourne
Registered:
May 2002
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Re: Turbo Rundown Q'z
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Thu, 12 February 2004 06:59
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edit it to my first post:
also the closer the AR is to 1 the quicker it would spool to full boost dependin on size? ie small one x flow would be the same as big one with comparable x flow? high AR exhaust low AR compressor would equal less lag?
I was about to ask about what 'stock' turbos would be good for my intended layout.
oh an yeah looking at it as a long term thing, so new prog ECU, big arse IC and upgraded fuel delivery were thoughts! tho to start with i'll run low bost so i can use the stock fuel set up. also is the computer tied into the turbos in any what? could i in theory run swapped turbos at stock boost whatever with standard engine management?
CORRECT ANY MISSTAKES!
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Location:
Melbourne
Registered:
May 2002
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Re: Turbo Rundown Q'z
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Fri, 13 February 2004 01:15
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The T28's you talk about, what HP has been made from usin them? in there origanal guise that is!  arnt the GTR turbos ceramic wheeled too? whats teh siz dif. compared to the ct12a's?
how bout stock exaust mani with custom turbo bolt pattern changes (flages?)? like the one Lumpy had for sale to suit his twin to single mani?
(PS i think i ment to say X-ray not blue print the exhaust mani! DOH!  )
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