Rah Rah

B18B guys with stock redline

This topic is in reference to the t3/t04e 57 and 60 trim garrett turbos. I'd like to know from actual owners, no theories please--real world experience only.

.48 vs .63
-What rpm do you begin to spool?
-When do you reach full boost?
-Is your top-end flat? (esp. 48 a/r)
-Overall pro's and con's as it relates to street/strip performance

I've searched nearly every topic regarding turbine housings, but nothing to answer these questions thoroughly.

DaX

iTrader: (1)

I have a .48 turbine on my B18A1. These are guestimates, but I believe I begin building boost at around 3K, reach full boost @ 8psi at around 4K, and I'm not sure what you mean by a flat top end [if this refers to power, i haven't dyno'd yet].

adseguy

hmmmm...problem with this is that it all depends on the setup. I have an equal length manifold, 360 degree thrust bearing, 3" DP, staright exhaust, etc..., etc...., So this helps a lot with spool. without all of these I could begin spooling 1K RPMS later or more. Make sure if you post to list your complete setup as well. BTW I got the 57 trim .63a/r.

Rah Rah

Since our b18b's have droopy topend power, usually beyond 6000ish, I was wondering whether or not the .48 would fall off significantly in that rpm range.

Rah Rah

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adseguy &raquo;</TD></TR><TR><TD CLASS="quote">hmmmm...problem with this is that it all depends on the setup. I have an equal length manifold, 360 degree thrust bearing, 3" DP, staright exhaust, etc..., etc...., So this helps a lot with spool. without all of these I could begin spooling 1K RPMS later or more. Make sure if you post to list your complete setup as well. BTW I got the 57 trim .63a/r.</TD></TR></TABLE>

I have a pretty restrictive setup:

maxrev kit = log style manifold, 2.5" downpipe, stock cat, and 60mm exhaust (2.36").

This is with a t3/t04e 57 trim with an .82 a/r housing (it's ridiculously laggy and I run out of rpm by the time it's reaches its true sweet spot)

DaX

iTrader: (1)

I have the lovefab sidewinder [nearly equal length tubular manifold] 3" downpipe, no cat, 3" catback exhaust [thermal r&d], full 2.5" charge pipe.

adseguy

No doubt. Gosh that is really bad...get rid of stock cat and that damn exhaust. 82a/r is too big for our cars too .63 and .48 is good. the log manifold and 2.5" DP is just fine for a setup though. I was just telling you that if someone told you they are reaching full boost at 3500RPM with a .63 a/r you need to know the setup they have.....everything counts...from electronic boost controllers to even a ported head! Realize that EVERY setup is different and you may be off by as much as 1500 RPM with the same turbo. BTW with the setup I'm running that I kind of listed in my last post I expect spool by 3500 and full boost of like 10PSI no earlier then 3800 and no later then 4300 RPM. Notice the room I am giving my self . Peace

graphic

i have a t04e 60 trim, t31 turbine side w/ .63 a/r and stage 3 exhaust...
just wondering when this little giant would hit 18psi...on a stock head/built bottom end h22 w/ 87 mm bore (9:1 compression)

Bailhatch

the A/R of the turbine housing doesn't really matter if one guy has a standard turbine wheel and the other has a stage 5. Most people have the stg3 but regardless this thread is pointless without the turbine wheel size.

adseguy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">the A/R of the turbine housing doesn't really matter if one guy has a standard turbine wheel and the other has a stage 5. Most people have the stg3 but regardless this thread is pointless without the turbine wheel size.</TD></TR></TABLE>

True! this guy is trying to figure out when he will get into boost, but like I said it's all about the setup anyway.

I know you didn't want theory, but....
<U>IN GENERAL:</U>
.48- Quicker spool, but top end flatens out
.63 - Good compromise between spool and top end
.82 - Good smooth top end, but terrible spool

Choose in accodance to what your WHP goals are and when you want boost in. Don't ask for setups it is a little pointless...If you want that go to boostid hybrid (check sig) and look at the dyno graphs.

Rah Rah

My car was tuned by Jeff a couple of weeks ago and she runs great:

http://www.boosted-hybrid.com/viewtopic.php?t=684

However, I'm going to swap the housing for something smaller and have jeff retune for higher boost. The .82 a/r I have, sucks dog nuts on a street car with a restrictive setup such as mine. I know the theory behind smaller turbine housings, but we all know that different setups, weather, alignment of the planets , and such will contribute significantly to the hard numbers. I just wanted you guys to share your experiences with YOUR setups.

I'm not changing the exhaust setup at this point in time. I like the exhaust note and I don't have the cash to invest in headwork or equal length manifolds. Guys I'm not aiming for 400whp, just the upper 200's. I'm shooting for a fun street/occassional strip DA.

Rah Rah

bizzump

Rah Rah

bump for the night crew

Rah Rah

one more time.....

japrex

interesting post...i actually have a precision sc-61 with .63 a/r on my stock b16a...have not got to run it yet though. i really have no idea how it will react with the small b16.

B18Flip

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaX &raquo;</TD></TR><TR><TD CLASS="quote">I have a .48 turbine on my B18A1. These are guestimates, but I believe I begin building boost at around 3K, reach full boost @ 8psi at around 4K, and I'm not sure what you mean by a flat top end [if this refers to power, i haven't dyno'd yet].</TD></TR></TABLE>

isn't that kinda laggy for the setup? I dont have a b18a1 but i had a .63 a/r turbo, inlinepro mani, 2.5" flared to 3" dp , no cat and 3" cat back and it spooled to 8psi at 3.6k

DaX

iTrader: (1)

It may be earlier...I haven't sat and watched it. I was just throwing out an estimate.

pngfolife

Log manifold on an F23A4, T3/T04b, 57 trim, .48 hotside. 2psi @ 2700RPM, 10psi @ 4500RPM. Pulls all the way to redline (6250RPM).