i'm new to the forum and all but i have a question. grabbed a turbo off of a 84' Saab 900 today, looks to be in pretty decent shape, spins freely, minor shaft play. 2 things that i was wondering were...
1. there is a very small crack inside the exhaust housing, is that a huge deal?
2. if anyone happens to know the specs for the a/r and what the stock wastegate is set, i believe its adjusatble but just wondered. thanks in advance

 

this post will tell you everything you need to know if it's good or not. Read the main part this guy did his research on junkyard turbo's https://honda-tech.com/zerothread?id=207403

 

sweet thanks, exactly what i needed

 

the only thing that post dosent tell or anyone else see to be able to say is a saab t3 good for a B16 42/48???? i would like to know and if it isnt what would be a good one for it B16 in a 1990 CRX SI 10psi or so

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by coyote &raquo;</TD></TR><TR><TD CLASS="quote">the only thing that post dosent tell or anyone else see to be able to say is a saab t3 good for a B16 42/48???? i would like to know and if it isnt what would be a good one for it B16 in a 1990 CRX SI 10psi or so </TD></TR></TABLE>

NO. I ran that same exact turbo on my b16a for a while. Boost would drop off above 5k rmp because it cant flow enough for that engine. I know of a few other people that had the same problem. I swapped it out in favor of a larger t3t4 and the pressure loss went away. I had the boost controller set @10psi and boost woud drop off to about 4psi (@redline). Without the boost controller boost would go from 5.5psi down to about 4psi.....spools fast but has no top-end

 

thank you
you just saved me a lot of money ! what size t3/t4 did you have ?

 

do the saab turbos come with the 3 bolt side exhaust wastegate swingvalve housing? i know at least one of the OE manufacturers uses this housing, but i can't remember which it is...

this is the piece i'm talking about:

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by coyote &raquo;</TD></TR><TR><TD CLASS="quote">the only thing that post dosent tell or anyone else see to be able to say is a saab t3 good for a B16 42/48???? i would like to know and if it isnt what would be a good one for it B16 in a 1990 CRX SI 10psi or so </TD></TR></TABLE>

too small..for your b16, go with a t3/t4 60 trim .63 exhaust side

 

now see i post about a t3/t4 and they saild it would be a little big i only want to boost about 10psi or so

 

the picture of the wastegate you have is indeed the saab style.

 

My buddies got a 95 Saab Turbo, I believe its a 900S. They come with a T25 I believe. What size is the Viggen turbo? how much bigger is it then the T25? Lastly is the Viggen turbo bigger or smaller then a 14B? My buddy wants to step up to a bigger turbo, whats his best bet? He has a chipped ecu for more boost ,fuel and spark, a full 3" exhaust and a K&N air filter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by coyote &raquo;</TD></TR><TR><TD CLASS="quote">thank you
you just saved me a lot of money ! what size t3/t4 did you have ?</TD></TR></TABLE>
Garrett T3T40E 57 trim .63 A/R

 

brand new turbo
T04E turbo charger
3" inlet DIAMETER

2" outlet

WET FLOATING BALL BEARINGS

1/8 NPT OIL inlet
3/8 NPT coolent

T3 / T4 footprint ok

specs

.57 COMPRESSOR WHEEL TRIM

.60 A/R COMPRESSOR

.63 A/R turbine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16ahybrid &raquo;</TD></TR><TR><TD CLASS="quote">

NO. I ran that same exact turbo on my b16a for a while. Boost would drop off above 5k rmp because it cant flow enough for that engine. I know of a few other people that had the same problem. I swapped it out in favor of a larger t3t4 and the pressure loss went away. I had the boost controller set @10psi and boost woud drop off to about 4psi (@redline). Without the boost controller boost would go from 5.5psi down to about 4psi.....spools fast but has no top-end</TD></TR></TABLE>

i ran this same turbo in my b16a2 coupe, and it ran just fine...maybe u had problems elsewhere. for me it pullled all the way to the 8400rpm fuel cut

mike

 

which one the t3 Saab turbo or the t3/t4?
i wish i could get a staright answer here some time before i buy a turbo !

 

the t3, its pretty obvious the t3/t4 would

mike

good luck with youro setup whichever you choose!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MikeMAN &raquo;</TD></TR><TR><TD CLASS="quote">

i ran this same turbo in my b16a2 coupe, and it ran just fine...maybe u had problems elsewhere. for me it pullled all the way to the 8400rpm fuel cut

mike</TD></TR></TABLE>

what was your exact set up with the saab turbo.

im also running the t3 saab turbo.before the intercooler and fule upgrades it really hauled ***,boosted till redline.once i added the intercooler and bigger injectors it dropped off a lot,now i peak boost at 10 psi at about 5k,then it drops off till i hit red like,from 10 down to about 7.its not tuned yet and im hoping to get rid off this problem.

 

DSM 450's, SMC+, Saab t3 turbo, RevHard style log mani....non-intercooled

mike

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MikeMAN &raquo;</TD></TR><TR><TD CLASS="quote">DSM 450's, SMC+, Saab t3 turbo, RevHard style log mani....non-intercooled

mike</TD></TR></TABLE>

im wondering if the intercooler is the problem then,before i put my intercooler on i could push 10 psi all the way till redline.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civictypenos &raquo;</TD></TR><TR><TD CLASS="quote">

what was your exact set up with the saab turbo.

im also running the t3 saab turbo.before the intercooler and fule upgrades it really hauled ***,boosted till redline.once i added the intercooler and bigger injectors it dropped off a lot,now i peak boost at 10 psi at about 5k,then it drops off till i hit red like,from 10 down to about 7.its not tuned yet and im hoping to get rid off this problem.</TD></TR></TABLE>

Same here once i added the intercooler boost would drop off. I know it wasn't the intercooler leaking because i had it modified (endtanks) and pressure tested. That turbo cant flow enough with a intercooler, i know of 3 others that had the same problem. My buddy didn't have an intercooler so he was fine for the short time he ran that turbo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MikeMAN &raquo;</TD></TR><TR><TD CLASS="quote">

i ran this same turbo in my b16a2 coupe, and it ran just fine...maybe u had problems elsewhere. for me it pullled all the way to the 8400rpm fuel cut

mike</TD></TR></TABLE>

Do you have an intercooler? Or did you?

I just read further down.....thats why yours ran fine, you had no intercooler, once you add an intercooler there is drastic pressure loss......(all 4 situations i've heard about involving this turbo/engine/ once intercooled)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16ahybrid &raquo;</TD></TR><TR><TD CLASS="quote">

Do you have an intercooler? Or did you?

I just read further down.....thats why yours ran fine, you had no intercooler, once you add an intercooler there is drastic pressure loss......(all 4 situations i've heard about involving this turbo/engine/ once intercooled)</TD></TR></TABLE>

thats odd, there should only be a 1-2psi pressure loss..i would say that your intercooler was damaged or leaking because I know people that have used them on intercooled b18's fine too (Tinker219)

mike

 

I don't know everything about turbo systems, but it make sense that adding an intercooler will result in lower boost because:
1. The pressure drop in the pipes and IC.
2. The compressed air is cooler and now takes up less space.

I know a common misconception is that boost = hp. If the air's hot and needs a bunch of retard to keep from pre-igniting, that's not going to give much hp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MikeMAN &raquo;</TD></TR><TR><TD CLASS="quote">

thats odd, there should only be a 1-2psi pressure loss..i would say that your intercooler was damaged or leaking because I know people that have used them on intercooled b18's fine too (Tinker219)

mike</TD></TR></TABLE>

well i know for a fact my intercooler is fine,brand new,not only do i have all my pipes welded but i also have rubber couplings over every single weld and im using t bolts for clamps,so i know i have zero leeks,im using the same piping as when it was not intercooled also,my piping ran throught he front bumper so that when i got a intercooler i could just cut the pipes.like a i said before,once the intercooler was added i started having problems maintaning boost.

but i have not uned the car or messed with my cam gears and what not,i may be able to change things up to hold more boost.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kb58 &raquo;</TD></TR><TR><TD CLASS="quote">I don't know everything about turbo systems, but it make sense that adding an intercooler will result in lower boost because:
1. The pressure drop in the pipes and IC.
2. The compressed air is cooler and now takes up less space.

I know a common misconception is that boost = hp. If the air's hot and needs a bunch of retard to keep from pre-igniting, that's not going to give much hp.</TD></TR></TABLE>

we aren't arguing about there being a boost drop..thats pretty obvious if you have built turbocharged cars, but we are trying to figure out why the boost drop in his car vs. my car (the RATHER large one)

mike