thewrai6th

Can I run a 19t on my B18 on relatively low boost (6-7psi)? It doesn't flow that much less than the 18G...

Edit:<dead links removed>

Just wondering, because I have almost everything to get going sitting around in the garage, except for a manifold.


Modified by thewrai6th at 1:01 AM 3/1/2007

thewrai6th

Noone? Oh well, I'll just do it and watch the EGT skyrocket

tony413

get a turbo thats properly matched for your needs thats the best advice you never wanna run an inefficent turbo its just not worry the money you wil spend fixing your problems

thewrai6th

Yeah, basically I'm wondering if the 19t is inefficient for a b18 on 6-7 psi. It's about the same size as the 18G.
http://www.stealth316.com/2-3s-compflowmaps.htm

Finland

there are three ways to look at this issue

1.) guess
2.) theorize
3.) take measurements.

I'd go with 3.

AWDstylez

Comparing it to the B16G chart on the same page (they have the same units and I know what a 16g flows), it looks pretty tiny. Might not be bad for a quick spooler on an LS, but you'll probably be choking out a GS-R with the tiny hot side.

tony413

ok i looked at the compessor map and with a stock LS motor that should be efiicent enough to get you into the 250ish hp range if you want more hp power i would suggest the same as the guy above me go with a big 16g or gt28 as both of these turbo flow an efficent 40lbs/min at decent pressure ratios also never judge a turbo based on how quick will it spool thats a guareente for destuction

thewrai6th

When I buy, I'm going all out (well not gt40...) I'm going for the gt3582r.
Thanks for the responses, 225HP was about what I was excpecting from the 19T. It is a bit small, I know.
Thanks for the replies!

thewrai6th

Results:
This TDO4H-19T turbo is just too small for the B18, it's is off the compressor efficiency charts and runs out of breath well before the redline (starts dropping at 7000). It works, but it has been a nightmare to tune the top end with fluctuating boost and high temps.
Not that it has caused me any problems either, I'm getting near 20K miles on this setup.
Still trying to find the money for that GT3582R setup

quicksilver1689

or maybe a gt28rs .83 setup where it wont choke up top with an ls head, but give you a nice fatty torque curve which is what matters.

nowtype

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thewrai6th &raquo;</TD></TR><TR><TD CLASS="quote">Results:
This TDO4H-19T turbo is just too small for the B18, it's is off the compressor efficiency charts and runs out of breath well before the redline (starts dropping at 7000). It works, but it has been a nightmare to tune the top end with fluctuating boost and high temps.
Not that it has caused me any problems either, I'm getting near 20K miles on this setup.
Still trying to find the money for that GT3582R setup </TD></TR></TABLE>

How do you figure that? 550cfm is about 38.2lb/min. That means the compressor will flow enough air to produce roughly 380whp. So if you are looking for sub 300whp, I can't see any issues with this turbo. Mitsubishi turbos are kind of known for running small turbine wheels so you probably need to run a bigger downpipe than you'd usually suggest so that is probably a limiting factor.

thewrai6th

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nowtype &raquo;</TD></TR><TR><TD CLASS="quote">That means the compressor will flow enough air to produce roughly 380whp.</TD></TR></TABLE>
I don't know of any 19T making 300+ HP on a B18, if you know of a setup please let me know. It's a custom 2.5 "DP to stock cat
At 6500RPM it drops to 8 psi, 7000RPM 7 psi and by 8000 RPM it's having a hard time trying to stay at 7.
The powerband is low (4000-6500), but it still pulls like hell of course. If you are looking for quick 200-250 WHP daily driver, then this may be a good choice for you.

nowtype

Engine size really doesn't matter per say. It's about air flow. The compressor will flow 550cfm. 14.4cfm per 1 lb/min which means 38.2 lb/min and a cheap estimate is 10hp per 1 lb/min of flow. So the compressor will flow enough for roughly 350-380whp. Your issue is exhaust restriction. Mitsubishi housings are small and they use small wheels so that they provide a ton of midrange. In order to get some more top end out of your turbo, you really need to run a 3" exhaust to help the turbine work more efficiently.

I won't say this turbo will do 350whp, because I believe it is turbine limited. I will say this turbo will push 300whp with relative ease if you are able to let the turbine work relatively efficiently. A big exhaust and a higher volume exhaust manifold would probably work wonders on your setup. I would expect huge gains (30%+ wouldn't surprise me in the lease) if you upgraded those two parts.