What size T3/T4 turbo should I get for my built B18B? I want to make at least 320 HP and I would like to start boosting around 3000-3500 RPM and see full boost around 6000-7000 RPM. I was looking at a .63 trim, but I think the lag will be a good bit more than what I want. I would really like to know from people with experience with each size turbo. Thanks in advance.

 

I had a .63ar 57trim on a B18A. It made 10psi by 4K rpm with an open downpipe

 

Damn, really? That might be what I'm looking for. Thanks. Keep em coming.

 

t3/t04e 57trim made 350+ @15psi for me........and it could have made closer to 400whp if i had a real exhaust system........

 

gt35e

 

I would recommend these specs:

T3/T04 "E" compressor housing turbo
57 - 60 trim compressor wheel
.63 exhaust housing
Stage 3 or 5 exhaust wheel
3" downpipe
3" test pipe
3" exhaust

This turbo and exhaust system configuation will give you quick spool up and will flow enough air to support your HP requirements. If you can get a 60 or 61 trim compressor wheel, you will be able to make more HP at lower boost levels.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by streamline1 &raquo;</TD></TR><TR><TD CLASS="quote">I would recommend these specs:

T3/T04 "E" compressor housing turbo
57 - 60 trim compressor wheel
.63 exhaust housing
Stage 3 or 5 exhaust wheel
3" downpipe
3" test pipe
3" exhaust

This turbo and exhaust system configuation will give you quick spool up and will flow enough air to support your HP requirements. If you can get a 60 or 61 trim compressor wheel, you will be able to make more HP at lower boost levels.</TD></TR></TABLE>

 

Ok cool. I am planning on keeping A/C and P/S. Will a 3" DP affect these at all?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhatBoy5015 &raquo;</TD></TR><TR><TD CLASS="quote">Ok cool. I am planning on keeping A/C and P/S. Will a 3" DP affect these at all?</TD></TR></TABLE>

depends on the manifold

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by komat &raquo;</TD></TR><TR><TD CLASS="quote">depends on the manifold</TD></TR></TABLE>
I'm getting a Revhard cast manifold.

 

So does anyone know if I will be able to use a 3" downpipe with A/C and P/S? The B18B will be going in a 97 Civic.

 

57 trim, very good turbo for what you want.

with the 3" exhaust system you should see full boost before 5k rpms

 

57 trim .63 is a good choice as others have stated. you may just need to have someone fab you up a 3" for that, it will need to be tight radius but it is possible.

 

50 trim has the best compressor

 

Anybody know of a 3" dp that allows for ac and ps? if not, does anyone have any pics of custom dp's?

 

Check out http://www.spoolinperformance.com they have their quick4ac mani. and 3in. d/p thats a/c friendly

 

Could I get a RevHard manifold and then buy the Downpipe from Spoolin Performance? Would the dimensions still be the same? Cause I just can't see spending $650 on the manifold.

 

How much of a difference in spool time and power is it between a 2.5" and 3" Downpipe?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhatBoy5015 &raquo;</TD></TR><TR><TD CLASS="quote">How much of a difference in spool time and power is it between a 2.5" and 3" Downpipe?</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhatBoy5015 &raquo;</TD></TR><TR><TD CLASS="quote">How much of a difference in spool time and power is it between a 2.5" and 3" Downpipe?</TD></TR></TABLE>
Anybody?

 

gt2871 will get you the power and reach full boost before 5k

 

I would get the .57 trim T3/To4E .60, .63, if you want a little more pull up top and laggier than get the .60 trim. Should easily meet your power goals and will be in good power range.

 

prob not much of a difference in 3" DP compared to 2.5" . I have a 3" DP and exhaust but at one point it has a dent making it almost 2.5" , I still made really good power on the b18b.

 

there would be a noticeable gain from a 2.5in dp and a 3in !!!!!!!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhatBoy5015 &raquo;</TD></TR><TR><TD CLASS="quote">Could I get a RevHard manifold and then buy the Downpipe from Spoolin Performance? Would the dimensions still be the same? Cause I just can't see spending $650 on the manifold.</TD></TR></TABLE>
sorry to say but u gotta pay to play

all my setup was custom. but worth it, made real good power at a conservative tune and still there is room to grow