just curious to see whats going on out there and see whos planning a turbo for their 2.4?....im currently planning mine...just curious to see what everyones got planned

 

Just ordered the Hahn turbo kit for mine!

 

thats cool...good luck with everything

 

What turbo are you gonna run? Building your own kit?
I had the T3 w/60 trim on mine in 03/06, but tuning was not good enough then so I removed it.

 

im looking at a garrett t3/to4e 50 trim with .63 a/r comp and 5 bolt flange....i looked at the higher trims and what not but some of them have almost the same cfm as this one

and yea im building my on kit

 

Yeah, gotta compare the compressor maps. That turbo I think is a little big, unless you are really building the engine up and camming it.
I had some charts of CFM and stuff figured out way back then now I forgot it all! You want one that will give you a good spool time and meet your engines requirements. To big or to small and you'll be dissapointed in the performance.

http://www.turbofast.com.au/turbomap.html

 

any idea of where i can find the specs on engine?...like where to get the bore/ stroke and all of that?

lol i checked out the think and i dont quite understand how it works

 

Configuration: 2.4L
Displacement: 2.384 cc
Bore x Stroke: 88mm x 98 mm
Valvetrain: Dual overhead camshafts, 4 valves per cylinder

Valve Lifters: Hydraulic roller finger follower
Compression Ratio: 10.6:1
Firing Order: 1-3-4-2
Fuel System: Sequential port fuel injection
Recommended Fuel: Unleaded regular
Peak Horsepower: 177 hp (132 kW)
Peak Torque: 166 lb-ft (223 Nm)

You have to enter all of the info, assume that the VE (volumetric efficiency) is about 90% and that the compressor efficiency it around 60% 2000-3500RPM and 70% up to 5500RPM ideally. Its not the best one, you can directly calculate out the CFM requirements of the engine though an plot on various turbo compressor maps. You want to be in the sweet spot as much as possible throughout the engine RPM range.
You don't want to be near the surge limit nor do you want to have poor efficiency at anytime or the turbo will not opperate at its peak!

 

a guy on here use a turbonetics t3/t4 hybrid with a .48 i believe and he said it spooled to fast...i figured a little bit bigger ar might fix this so i chose the .63....i dont believe it would be to big....but maybe it is

 

when I charted it it was kinda near the surge limit till like 3000RPM. I used the T3 with 60 trim and it started spooling by 2000 and was at full boost by 2500. Really nice! But I had problems with the WOT tune.

I think it was a wee bit to small though. Upper RPMs 6000 and up would be a little beyond the ideal efficiency.

 

i entered all of the points but it just shows a bunch of different maps and thats it....are those the reccomended turbos or am i missing something?

 

You gotta use the selector to find the t3/to4e 50 trim and then enter the engine information and the 5 points
RPM psi VE Eff
2000 2 60 90

3000 9 70 90

4000 9 70 90

5000 9 70 90

6000 9 60 90


I may be doing this all wrong, but I think this get it fairly close.
I'll try it again too.

Yeah, when I entered that again and checked the T3 w/60 trim like I had it showed nearly maxed at 6000RPM. The t3/to4e 50 trim was a little too large, but the 46 trim was pretty good!

 

so a 60 trim wouldnt work?...im dumb when it comes to this...i had originally decided on a 50 trim for some reason but i cant remember what reason

 

Not with the t3/to4e, even the 50 trim appears to be a little to much for the mostly stock 2.4l. The 46 trim looks like it stays in a good range though.

 

ok that makes sense....right now im looking for a good journal bearing turbo that will make 300-350hp and is for a pretty cheap price....do you have any suggestions?...i juat want a turbo that can spool by 3500 or so and hold boost for most of the rpm band....what do you think?

 

Well I bought that new T3 60 trim on ebay for like $350 shipped I believe. If you found one with a super 60 trim that would be a little more ideal for that engine.
Or just the one you were looking at but with the 46 trim instead. The Hahn kit uses the " disco potato" which is a dual ball bearin w/water cooling and oil. I think it is a GT2860RS. Its pretty pricey though like $1100 new!

 

ok so heres a link for a 46 trim...http://www.rogueusa.com/Garrett-T3-T...t-t3to4e46.htm
do you know what the cfm on this turbo is or no?

 

Let me check into it.
The CFM of the turbo depends on boost and other factors, you need to know the CFM of the engine under boost to see if it meet its needs throughout the RPM range.

another link of interest

http://www.rbracing-rsr.com/turbotech.html

So it looks like with the T04E 46 trim .60 A/R you will be OK . It is a little inefficient (60-65% efficiency) up to about 3000RPM then is good the rest of the way to redline. This would work fine. If you want quicker spooling get te T3 w/ super 60 trim, and its cheaper.

 

ok so then im looking for a turbo that can flow around the area of 500-525 cfm if i want to make between 300-350hp. Now i dont really understand the compressor maps...maybe because i havent studied them enough....but its late and im about to go to bed so ill take a closer look in the morning....you seem to know a decent amount about these compressor maps so coul you help me find a decent brand name semi cheap turbo that will work best with my application?...like i said im guessing ill need roundabout of a 525cfm compressor but im not sure...i cant find any cfm ratings on the 46 or super 60 so im not sure...if you could help me find a decently priced turbo that would be good for what i plan to do i would grealty appreciate it

o ok..your saying that the 46 trim will begin making boost at about 3000k? what would the super 60 be able to begin spool at? sorry for all the questions

the last questioni have is how can a 2.0 be using 50 trim and higher turbos on here? can their engines handle it or are they just poorly matched to their motor?

 

Well heres the deal about hp and flow. If you are leaving the internals stock you can only boost about 8psi stock and up to 10-12 if you have a great tune and are brave!
That will give you about 280-300 BHP (crank) @8psi. The flow at 100% volumetric efficiency at 6000 RPM is about 19.5 lb/min or 254 CFM, this is because the engine only draws in air once every two rotations!

It looks like you would be fully spooled by about 3000RPM.
I can chat more tomorrow, feel free to ask away.

 

ok....so a 46 trim wouldnt be too small for my motor? and it will net me a good hp turn out? i dont want to have any surge problems or anything of the sort....just a smooth running setup that can get me safely and effciently close to or right at 300hp for starters....

last question....if this 46 trim will do the job...which brand should i go with and where is the cheapest place to pick one up...that is if you know?....i found it for 625...which is still a decent amount...

 

I know that the Hahn kit i ordered claims 290 Hp at the crank @ 8psi.
I think that the t04e w/46 trim and .60a/r would work well, the spool time will be a little slower than the T3 2/super 60 trim due to the slightly larger size.
The t04e will give you a little more room to build if you decide to up the boost later, or build the motor for more boost (ie lower compression pistons).

 

well im out for the night...ill be back on in the morning and im sure ill have a couple new questions if thats alrite...thanks for all the help i really appreciate it....my last question is with this turbo where do you think i would begin to see boost and what rpm for full boost?....i figure ideally 3000 to begin boost and maybe 3500 or so for full boost.....if thats even possible....what do you think? once again thanks for all the help

 

Its hard for me to tell for sure, but from my rough calculations it appears that the T04e boost would begin to pickup around 2500 and peak at around 3000 to redline these numbers are +/- 250 RPM
You don't want boost to kick it to high in the RPM range or you will be fighting turbo lag at every shift!

 

this turn out to be a 2 man thread