Im sorry....

I have a DRAG gen three kit for a gsr...t3/t4. Could anyone just please teach me what my ar is for each side, and trim?

Also- two things about compressor maps...when is "full boost" achieved? and what purpose does arbitrarily picking an RPM to determine CFM achieve?

school me

 

to add something, when you calculate for different RPMs values, how do you know how much boost to calculate for? every compressor hit boost at different speeds, soo how can i know?
TIA


[Modified by GZERO, 11:37 PM 2/11/2003]

 

3 of the drag kits we have came with .63 exhaust trim and i think .60 compressor
thats the t3/t4b of course..

 

was that for your motor? or a gsr? or do they even differ?

<FONT COLOR="blue">ALSO, when looking at compressor maps, do you find the one for the exhaust, or compressor?</FONT>




[Modified by B18EG6, 6:11 PM 2/11/2003]

 

Usually the maps you see are for compressor

 

you sure? that would mean if i had a 13/t4, it would show horrible lag (seeing as how i would fnd the t4 map)

 

maps are usually available only for the compressor section. just recently turbobygarrett.com released turbine maps. but those were for the GT series of compressor and turbine maps. nothing on the standard line of turbine maps.

a turbine map does not appear the same as a compressor map. as boost increases of course the flow increases, but on all turbines there is a certain boost pressure(meaning exhaust manifold pressure) that cant be exceeded. so its basically just a line across a airflow vs. pressure ratio.

 

would not matter
drag gave my buddys 1.5 del sol a t3/t4b.. ****** dumb.

 

what wouldnt matter?

any T04b compressor would be a bad choice for a 1.5 liter. unless it was spinning to 10,000-15,000rpm

 

which motor the turbo was going on...he was saying DRAG gave the same turbo to a 1.5l.


sooooooo when i search for a map, i search for the 63 exhaust trim t4b ?


[Modified by B18EG6, 9:10 PM 2/11/2003]

 

no the .63 is the a/r of the turbine housing. The turbine size is a T3. the compressor is the T04 compressor family with the B being the flow range and compressor design, small inducer vs. large exducer. nothing to concern yourself with......

just check turbonetics-inc.com for the compressor maps, there are 5 T04B compressors...... most likely its NOT the 60-1 and the 62-1

 

What about my question? i think it's important too

 

guess
by reading around, youll get some idea of what kind of boost certain turbos will make where.

 

Thanks, wil do...

he said .60 for compressor side though....im looking for a t4b .60 map RIGHT?

I know the turbine is t3 .67 trim. I know the compressor is t4b .60 trim..correct?

so....which map do i look at? i dunno if anyone has made this clear


[Modified by B18EG6, 3:26 AM 2/12/2003]

 

If it's a turbonetics turbo and in the b series compressor wheels, it's not going to be a number trim like the e family (i.e. .60 trim) unless it's a 60-1 or 62-1. Go here for a listing of the compressor wheels for the b family compressor wheels :

http://64.225.76.178/catalog/comp_wheels.html

Edit : The A/R is usually stamped on the outside of the turbine housing and on the inside of the compressor housing near the outlet. HTH





[Modified by boostaholic, 9:02 AM 2/12/2003]

 

when looking at compressor maps, compressor housing A/R does not come into play (the part about the .60 you talk about) .60 is a widely used a/r compressor housing.

so you are still adding words together that mean different things (i'm not being a smartass)

look at the link someone posted and you'll start to find out all the compressors that are available. Then you get a certain compressor housing, then you choose a certain turbine for your HP level, then you choose the turbine housing for powerband choice.

the .60 and .63 you speak of are compressor and turbine housing a/r's respectively. there are wheels in there that you have to measure to find out the compressor wheel trim.

 

Thanks the link helped a lot...now, where can I find a map for my turbo? I do not know the numbers on it, because I am bout 150 miles away from it right now.

I was told it was a t3/tb4... 60 a/r for the compressor.

where do I find a map for this? The link directed me to ten different wheels i think..all of which are to4B

s
super-s
t5/6
v
super-v
h
super-h
60-1 hi-fi
60-1
62-2

and then I foind a listing of maps...so which map is mine?


[Modified by B18EG6, 4:42 PM 2/12/2003]

 

Like greaser said, the a/r doesn't affect the compressor map reading. What you need to do is measure the exducer and inducer with a pair of micrometers and then you can compare it to the turbonetics catalog to see what compressor wheel you have. Then you can pull up the respected compressor map of that wheel. HTH.

 

exactly what boostaholic said.

On each compressor map listed, there are dimensions of exducer and inducer. Thats how you find out the trim.

http://www.majesticturbo.com/compression.html is another site that shows the full data for each compressor. its max flow in compressor dimensional data.


Basically take the compressor housing off (the 8 bolts on the aluminum side of the turbo) and then carefully remove the housing. you will then have the compressor staring at you in the face. Measure the diameter of the small part and the diameter of the big part of the compressor. these are called inducer and exducer.


If you get more in depth into this, you'll start to notice a relationship with inducer to exducer sizes and the way the map looks