I'm looking at the garrett GT line of turbos.
Here's what they look like with a 10psi b18c1 line.
The line goes from 2500rpm to redline.
Comments?





They're in order gt28R, gt28RS, gt30R, gt32, gt35.

 

You did that totally wrong, your line should slope upwards... Better Triple check your formulas!

edit:

oops, yeah... well, and the turbo is not always spooled, you have to factor that in.

 

Yep, but it's hard to predict how the turbo will spool up and that's going to depend on the turbine section also. But the books I've read said to assume the turbo will spool up by 2500-3000rpm.

what do you think of the different turbos for this application? See any good matches? any blatant miss-matches?

 

Plotting compressor maps is a waste of time.. Some of the best turbo's when u plot them for a honda look like they would never work. but they work the best!!

Out of the garret's GT series go w/ the GT35R if u want big power. If u want good power and insane quick spool up go w/ the GT3030.

 

Get a t3-super 60. You wont regret it, it's an excellent match for the gsr motor. It has the airflow to support a good amount of horsepower, and it will spool before you fall asleep waiting for some of the bigger ones.

 

This was done with our T3/67 on a stock gs-r motor with a 3mm headgasket.... its a great turbo for a stock gsr

 

what was the boost level?
does the t3/67 correspond to a GT series model?
damn man. that thang must KICK when it spools up
that's a lot of power but it would be nice to have a wider powerband too for a street car.
For 1/4 times only it doesn't matter as long as it's above the landing point when you shift... but that's not as important to me.

"Plotting compressor maps is a waste of time.."
Where does that come from? How are you going to estimate the air density that's coming out of the turbo and therefore the power gains? Matter of fact, how are you going to avoid compressor surge?

 

This was done @ 11psi tuned with hondata.

 

just go with something that works.

 

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

"Plotting compressor maps is a waste of time.."
Where does that come from? How are you going to estimate the air density that's coming out of the turbo and therefore the power gains? Matter of fact, how are you going to avoid compressor surge?</TD></TR></TABLE>

It is because 90% of the time they are innaccurate. Ive seen Garret compressor maps that are different from Turbonetics compressor maps for the SAME EXACT compressor wheel. I have seen plots where a turbo looks like it could never work, and guess what? it works the best... There are way too many variables to accurately figure out power gains and the surge lines for all these turbos. All u can do is look at it for whats it worth and use it to get an idea of how the turbo will behave... The real way to know if a turbo is going to make power or surge is to put it on the motor and try it out... If u don't have the funds to do that; then you should go w/ whats proven.

 

Well, from the maps, it looks like the GT30R (third map down) would be f*ck*ng awesome for this application. The whole top end is on the 78% and 72% regions. And it's a ballbearing turbo. The only problem is if full boost comes on before 3000rpm and surge hits.

Is anyone running a GT30R at round 10psi on a stock b18c?

 

Thats a dope *** turbo on a B18c.. I believe SiRKid (sp) is running one his B16a. Try searching the archives for GT30 posts from about a yr. and a half ago.. I almost bought this turbo and read alot of people reviews on it. I don't remember anyone having issues w/ surge but it wouldn't hurt to look.

 

I judge my turbos on the hp it can produce. Compressor maps just confuse the situation. Its like flow testing heads, use one head on a flow bench and put it on another one and guarranteed they will give different results. I buy turbos that can provide the hp capabilities I am aiming for, and consentrate on the engine to get me there. In my eyes compressor maps are like dyno sheets, they really don't mean much, its all about the ets & mph at the end of the day. The best thing about this site is that any turbo you can possibly think of putting on your car has already been used. Info is at your fingertips with the search key (no pun intended). Good luck on your setup, you sure as hell can't lose with all the info on this site.