Type R 00

i found a T25 turbo for 40 bucks from a guy near my house... if i made a setup based of a T25 turbo.. will that be a good set up for my Ls integra (B18b1)

how would the lag be and how could this compare to a t3

lVlemphizStylez

omg...get rid of that peanut sized turbo...Id rather have a 75 shot of nitrous...



Modified by lVlemphizStylez at 7:08 PM 1/21/2007

Type R 00

any other input

lVlemphizStylez

lmao I take it , that's not what you wanted to hear...But sorry to break it...It's no opinion or personal preference...That turbo will starve your engine and will need considerable amounts of PSI to make any power...especially on an LS. You arent in the effeciency range of that turbo until 15 psi...And even then dont expect impressive numbers

Type R 00

its not that thats not what i wanted to hear.. but im not jsut going to stop over what 1 person said? thatd be dumb.

lVlemphizStylez

youre right..so ill leave you with this...If you understand how to read it, you will probably drop the idea

RS'R'

whats on the y axis?

lVlemphizStylez

pressure ratio

Swiftstar

i wish i knew how to Read these Charts.

wrXtian

with a t25 your gonna get boost really early on.. probably around 2800 you could see full boost i bet, but it's gonna lose power the farther up your revs go.

Snafubmx234

http://www.homemadeturbo.com/f...240.0

That setup was with a 14b, just a bit bigger than the T25. It'd be a nice street turbo, but it'll choke the ls top end, or already lack there of. You'd get sick of it in about a week.

Go t3 .63/.60, or a t3/t4.

Schister66

1-left side, PRESSURE RATIO
(14.7 + amount of boost) / 14.7 = PR
so to figure out the PR for 8 PSI
(14.7 + 8) / 14.7 = 1.54 PR


which means that on the turbo listed, it is efficient from ~9psi to about ~18psi. At those pressures, this turbo will flow approx 8-12lb/min.

Schister66

this is a quick HOW TO: Read Compressor maps

the info below is for my old turbo....T3/T04E 60trim .63ar

1-left side, PRESSURE RATIO
(14.7 + amount of boost) / 14.7 = PR
so to figure out the PR for 8 PSI
(14.7 + 8) / 14.7 = 1.54 PR


2-bottom side, AIRFLOW RATE UNDER BOOST (LB/MIN on this map)
Most methods of calculation your engine's airflow rate will give you the answer in cubic feet per minute (CFM). However most compressor maps measure airflow rate in pounds per minute (LB/MIN). As some of you may know the weight of air varies with the temperature. To convert CFM to LB/MIN use the following numbers.
@ 48 degrees F : (CFM * 0.078125) = LB/MIN
@112 degrees F : (CFM * 0.070318) = LB/MIN
@175 degrees F : (CFM * 0.06251) = LB/MIN

Say for example our airflow rate is 500 CFM , and the temperature is 112 degrees F.
(500 * 0.070318) = 35.16 LB/MIN

*For those of you that know anything about ideal gas law, if you know a better way of explaining how to convert CFM to LB/MIN, your input would be appreciated. But please explain it in "laymans" terms, so that everyone can get a grasp on it.

3-dotted line on far left side of "ovals", SURGE LIMIT
It is important to try and keep yourself on the right side of this dotted line whenever possible. If you fall to the left of this dotted line you will experience compressor surge. This type of compressor surge will occur when there is too much boost, but not enough airflow through the system, usually this is between idle and the point at which full boost is reached. The chirping sound that can be heard is a result of the oscillating air. This sound is often described as a "Snakelike" sound or a che-che-che sound.

*staying in the "surge limit" area for too long could possibly damage your turbo.


4-numbers on far right, 46,020, 69,640, 83,972 etc, COMPRESSOR RPM
This is RPM at which the compressor fans will be turning. an average RPM is between 90,000 and 130,000. The line that branches out from each of these numbers that goes towards the surge limit line shows you the RPM range of the compressor fan across the entire compressor map.


5-78%,75%, 74%, COMPRESSOR EFFICIENCY
This is related to the temp of air and how much it is being heated up as it is being compressed by the compressor. A low number (60%) means that the compressor is heating the air more a high number (78%) means the air is not heated as much when it is compressed.


6-"Ovals"
I you look closely you will see that the compressor efficiency numbers usually sit right on top of one of these Oval lines. These Ovals show you the boundaries of the compressor efficiency at the different percentiles. Think of it as a topography map that shows you different elevations or changes in elevations. The innermost Oval on the sample T04 E 60" is not labeleb but it is probably 79% or 80%, so any where inside that Oval and you would be operating in the 80% range of that compressor.

Boosted_Rex.

Looking for a Mitsu Turbo? Id shoot for a 16G.

BDogggUT34

There's a guy on here who has a bone stock LS and pushing 14psi making 240whp on a T25. I'm shooting for about that at 10psi using my T3/T4 57 trim. If you want 175-200whp then go for it, should spool very quickly but drop off topend definitely. If you want more you should probly save for something bigger!