Built b16, hi comp + boost ??

Hi guys,

been reading bits n pieces about turbo b16's etc cause I've had the itch for boosted vtec for a while now.

currently running basically a built skunk2 head with pro1 cams & adjustable gears, ctr pistons, and 420cc injectors pressurised by 255lph Fuel Pump. All controlled by an S300 making 125 fwkw.

just after some experienced thoughts like what sort of boost should i put through this - if any. my aim is for a nice reliable daily (with a/c and p/s) that's occasionally tracked / stripped - and blows the doors of falcadors!!

I'm not looking at changing any current parts (including the 2.5" zorst) so what size turbo is suitable? Preferably one that will bolt up to a t28 flanged log mani. seems to be a lot of people recommending gt2871r's and gt30's... would they bolt straight on?

10PSI is good, GT28R is good on daily drive(i currently have this making 162kwatw), GT28RS is good mid range (seen one @10PSI making 175kwatw), GT2871r is top end (haven't seen any good setups with this yet on a b16).

I'm gonna be trying the GT2876r, we'll see how it goes.
I think the T3 is abit big for a b16

All the GT2xxxx turbos have same bolt pattern and will fit the same manifolds. GT3xxx Is diferent bolt pattern (and easier to find from the US)

u can get the 2860,2871,2876 in a T3 flange also

E85 with Boost is a winner

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Originally Posted by fatboyz39

E85 with Boost is a winner

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And a big turbo.

Limbo, are you running hi comp pistons (CTR or better) with your 10psi?

nope stock motor b16a2.
If you got a higher comp i'd go the GT2871r and take advantage of the hi-comp.
With the higer comp engines if your turbo is too restrictive it will cause the engine to ping

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Originally Posted by mooshie

All the GT2xxxx turbos have same bolt pattern and will fit the same manifolds. GT3xxx Is diferent bolt pattern (and easier to find from the US)

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not always, i had a GT3071R with a t28 .64 rear housing.
The 28 or 30 just defines the exhaust wheel size and the 60/71/76 generally defines comp wheel size.

personally i wouldnt be goin larger than a t28 on a high comp b16 motor simply cos the efficiency of anything larger than a t28 will require more boost to make it efficient.

The disco potato (GT2860RS) seems like a pretty good sized turbo for the B series engine. If I had more cash to spend, I definitely would have got one for my setup

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Originally Posted by Davo

personally i wouldnt be goin larger than a t28 on a high comp b16 motor simply cos the efficiency of anything larger than a t28 will require more boost to make it efficient.

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the effeiciency range for any t28 is no more than 7000rpm.......

our hondas including kraiye's built b16 will by far be able to rev past 8000rpm...


dont be fooled kraiye, go one better and get a gt30, our hondas love them....
unless ur happy spend money on a turbo kit that will give u maybe 20-30kw more than what u have......i dont think that is bang for bux.....

if ur worried about lag, invest in a decent tuned length manifold and the lag....will be the same as a t28 with log compared to a tuned length mani with gt30...i have graphs to prove this as i spent the money 2twice to get where i am......

do some more research and speak to tuners that have done this work before adrian from toda is a perfect example as a tuner also james aka BLKCRX from revzone, also speak to people who have performed it on their cars already, deanno (DLO01), myself and there are many more..........

i happily drive my dc2r with stock 11.1 comp and gt30.....all day every day....

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Originally Posted by IEVAQ8

the effeiciency range for any t28 is no more than 7000rpm.......

our hondas including kraiye's built b16 will by far be able to rev past 8000rpm...

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Compressor efficiency has very little to do with engine RPM.... it's based on pressure ratio and air flow which comes down to the amount of power you wish to make