My turbo has a .84 A/R turbine section .. is that need for concern??
01-23-2002, 12:32 PM
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My turbo has a .84 A/R turbine section .. is that need for concern??
i believe i have a T4 turbo, the the compressor has a 60 AR and the turbine has a 84 AR.. am i going to be experiencing major turbo lag with this T4 turbo? what are my options?
01-23-2002, 12:43 PM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (92HB_HB)
i dont know much about turbo sizing, but comparing to what ive seen....that sounds rather large to me 
01-23-2002, 12:51 PM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (92HB_HB)
Yes that's a straight T4 and it will be laggy. Are you doing heavy engine mods? Raised redline? Straight all-out Drag car? If not, get another turbo.. this would be bad on the street.
01-23-2002, 01:21 PM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (Rob92SC)
what engine is it going on? either way its probably still gonna be too big unless you've got nothing but dragging in mind.
01-23-2002, 03:41 PM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (PureTeg420)
anthing under 2L...you might experience some lag without proper tuning
01-23-2002, 04:26 PM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (92HB_HB)
its goin on an LS in a hatch... w/ hondata 2b @ 11 lbs..
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01-23-2002, 06:49 PM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (92HB_HB)
I will set it up and try it.. if it doesn't work to my satisfaction.. i'll sell it... but not for fiddy buckz...
01-23-2002, 07:08 PM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (92HB_HB)
yeah, you're goign to get full boost... by about 5000rpm or so. plus the 6800 redline on the LS wont' help you one bit.
01-25-2002, 09:43 AM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (cyan1de)
i heard this turbo used on a b16 motor built boost at around 3000 rpm... that's coming from an engine tuner too..
01-25-2002, 09:48 AM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (92HB_HB)
Your engine tuner is dreaming if you're describing that turbo accurately. With an 0.48 A/R T3 turbine I'm building boost at around 3200 on my B18C... A full T4 is completely out of place on a B18B unless you've got some mass work on it to raise redline to something reasonable.
01-25-2002, 09:51 AM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (dbman96)
Yeah, on that turbo there is no way it is boosting that early. Just not possible. That size turbo is best suited to a much larger engine, and/or one with a higher redline.
01-25-2002, 09:56 AM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (dbman96)
Your engine tuner is dreaming if you're describing that turbo accurately. With an 0.48 A/R T3 turbine I'm building boost at around 3200 on my B18C... A full T4 is completely out of place on a B18B unless you've got some mass work on it to raise redline to something reasonable.
01-25-2002, 09:58 AM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (Rob92SC)
I want to see the curves too! I have a .48A/R going into my D16 here very shortly and would like to see if there is a drop-off at all. Thanks!
01-25-2002, 09:59 AM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (97CivicFerio)
Actually I think that .48 A/R on a D series would be perfect!
01-25-2002, 10:02 AM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (Rob92SC)
So no drop off? It has a Stage 3 wheel too! Hopefully it will pull my *poor little* D16 to redline on an upslope!!! 
01-25-2002, 10:38 AM
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Re: My turbo has a .84 A/R turbine section .. is that need for concern?? (Rob92SC)
hey dbman, have you dyno'd your B18C yet? I'm curious as to how your HP and TQ curves would look with the .48 housing (good spool-up tho!). I'm thinking it (the curves) would come back down before redline. But I would love to see a dyno to varify my conclusions.
Edit: see topic "Dyno Plot!!!" which I just posted for my #s
[Modified by dbman96, 12:59 PM 1/25/2002]
