What size turbo should i get for a 450hp B16
11-09-2006, 01:40 PM
#11
1.5 BAR
Join Date: Oct 2004
Posts: 877
Re: What size turbo should i get for a 450hp B16
You simply cross check the boost and hp in the graph and see if it matches your needs.
***however this is assuming you are at sea level
and
***this is not taking into account the increasing amount of vacuum that is created at the compressor inlet of a turbo as air flow increases, so you have to read on the chart 2-4 psi higher than your actual desired boost.
and
***the flow chart is for the compressor only. actual behavior of the turbo will be greatly modified by the turbine specs you will choose.
just draw a horizontal line accross the graph at 2-3 psi over your actual desired boost and see what efficiency islands of at least 70% your line crosses at at which HP's it does. That'S the HP span in which the compressor will be the most efficient.
at 10 psi (so around 12 psi on the graph) the H trim is efficient enough for 350 HP
at 15 psi (so around 17 psi on the graph) the H trim is efficient enough for 450 HP
***however this is assuming you are at sea level
and
***this is not taking into account the increasing amount of vacuum that is created at the compressor inlet of a turbo as air flow increases, so you have to read on the chart 2-4 psi higher than your actual desired boost.
and
***the flow chart is for the compressor only. actual behavior of the turbo will be greatly modified by the turbine specs you will choose.
just draw a horizontal line accross the graph at 2-3 psi over your actual desired boost and see what efficiency islands of at least 70% your line crosses at at which HP's it does. That'S the HP span in which the compressor will be the most efficient.
at 10 psi (so around 12 psi on the graph) the H trim is efficient enough for 350 HP
at 15 psi (so around 17 psi on the graph) the H trim is efficient enough for 450 HP
11-09-2006, 05:07 PM
#13
0.0 BAR
Join Date: Dec 2005
Posts: 35
Re: What size turbo should i get for a 450hp B16
From what I've seen the gt35 will give you that ammount up to probably 500, and ONLY 450 isn't a small number for a b16, don't know your build but you should have the bottom end built up 
just my 2 sense.
just my 2 sense.
11-09-2006, 07:04 PM
#15
0.5 BAR
Thread Starter
Join Date: Jan 2006
Posts: 147
Re: What size turbo should i get for a 450hp B16
^^^^What's your point!? 450 is the goal i have decided to aim for, i know it's possible, i was trying to get info from the ones that have done it so that they can point me in the right direction.
And yes, i'm building my block and doing some work to the head, this is what i've been told from others.
And yes, i'm building my block and doing some work to the head, this is what i've been told from others.
11-09-2006, 07:54 PM
#16
0.0 BAR
Join Date: Dec 2005
Posts: 35
Re: What size turbo should i get for a 450hp B16
They aren't saying you have a bad HP goal, your just making it sound like 450 is easy. Whcih in a way it is, just build the block really well and you WILL need a big turbo, not massive but small ones won't get you anywhere close. Plan on ATLEAST a gt30 I would say but 35 is pretty good at making up to 500 or more I believe. And also plan on maybe having to remount your radiator, lose ac and powersteering and relocate battery. You'll need a bit of room . Btw this is coming from a never turbo'd person but I've read extensively for a few years, but I'm boosted
. Btw this is coming from a never turbo'd person but I've read extensively for a few years, but I'm boosted
11-09-2006, 08:07 PM
#17
1.5 BAR
Join Date: Oct 2005
Posts: 752
Re: What size turbo should i get for a 450hp B16
Originally Posted by BLAAST
You simply cross check the boost and hp in the graph and see if it matches your needs.
***however this is assuming you are at sea level
and
***this is not taking into account the increasing amount of vacuum that is created at the compressor inlet of a turbo as air flow increases, so you have to read on the chart 2-4 psi higher than your actual desired boost.
and
***the flow chart is for the compressor only. actual behavior of the turbo will be greatly modified by the turbine specs you will choose.
just draw a horizontal line accross the graph at 2-3 psi over your actual desired boost and see what efficiency islands of at least 70% your line crosses at at which HP's it does. That'S the HP span in which the compressor will be the most efficient.
at 10 psi (so around 12 psi on the graph) the H trim is efficient enough for 350 HP
at 15 psi (so around 17 psi on the graph) the H trim is efficient enough for 450 HP
***however this is assuming you are at sea level
and
***this is not taking into account the increasing amount of vacuum that is created at the compressor inlet of a turbo as air flow increases, so you have to read on the chart 2-4 psi higher than your actual desired boost.
and
***the flow chart is for the compressor only. actual behavior of the turbo will be greatly modified by the turbine specs you will choose.
just draw a horizontal line accross the graph at 2-3 psi over your actual desired boost and see what efficiency islands of at least 70% your line crosses at at which HP's it does. That'S the HP span in which the compressor will be the most efficient.
at 10 psi (so around 12 psi on the graph) the H trim is efficient enough for 350 HP
at 15 psi (so around 17 psi on the graph) the H trim is efficient enough for 450 HP
11-10-2006, 08:42 AM
#18
1.5 BAR
Join Date: Oct 2004
Posts: 877
Re: What size turbo should i get for a 450hp B16
the ones who say that only a GT30r or GT35R will make a forged honda in the 450+ WHP range are all wrong.
i am personally using a GT35R right now on my h22 and yes it spools up ok but quite frankly, the spool up difference is NOT at all worth all the extra money spent over my old T4 P trim 60-1 that was ALSO able off the same 600 HP.
price of a 600hp gt35R: around 1350$
gt35r compressor
gt35r turbine
price of a 600 hp t4 60-1: around 750$
60-1 compressor
P trim turbine
i am personally using a GT35R right now on my h22 and yes it spools up ok but quite frankly, the spool up difference is NOT at all worth all the extra money spent over my old T4 P trim 60-1 that was ALSO able off the same 600 HP.
price of a 600hp gt35R: around 1350$
gt35r compressor
gt35r turbine
price of a 600 hp t4 60-1: around 750$
60-1 compressor
P trim turbine
11-10-2006, 01:14 PM
#19
0.0 BAR
Join Date: Dec 2005
Posts: 35
Re: What size turbo should i get for a 450hp B16
I did not mean to make out the GT30/35 or 32 oi any other seem like they are the only ones that will ge tyou there, I'm just relaying since those are more concrete, since you can get a T4 that can support 600+ or one that only does 300 lol. Even probably a T3/T4 can get you there. But I don't care about Hp or Tq in a matter of just number, I prefer real quartermile testing even though that can change factors atleast it's easier to see even though this car has 300 hp it hits there earlier on, as apposed to a 400 hp car that hits it's peak later in the RPM range. Those were just bs numbers but you can get my point. But Good luckl!!!
11-10-2006, 03:43 PM
#20
3.0 BAR
Join Date: Jan 2003
Posts: 4,438
Re: What size turbo should i get for a 450hp B16
GT30R/GT35R or SC6152. HX35W will get you there too, as will a 60-1 and 62-1. Id personally go with either a precision turbo SC6152 or the HX35W for low cost and high performance. Ive seen comparisons that say a GT35R is only worth 10whp and 100 rpm difference in spool vs my SC6152S (same compressor section as a GT35R, its got the T04S compressor cover upgrade) I would NOT reccomend running the HX35W for low boost it seems to be much more efficient at higher boost levels.
