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Old 01-29-2009, 02:18 PM   #1
JDMFLCL
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Default Perplexed with Turbo Choice

So i've been looking around @ different turbo options, somewhat understanding what the different porting/compressor upgrades do, but not sure whats right for me.

The turbo would be going onto the following engine

EJ20G V2
816cc injectors
3" Turboback
Apexi Intake
FMIC
Walbro
Tuned on Microtech EFI

with a goal in the 370 crankish plus area (290-300 whp)

I currently have the TD05-16G that came stock, and am considering a bunch of options, Keep it stock and just raise boost to reach my goals? Port and Polish? 18g compressor? 20g compressor? Combination?

What do you think would work best, this is a DD / AutoX so slighly faster spool would be nice, but not totally necessary. Preferably would like to retain my current turbo and just have work done to it if needed, but what do you guys suggest.

I have the small td05-16g with the 90 degree inlet.
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Old 01-29-2009, 02:24 PM   #2
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Keep the 16G but have someone like FP, Blouch or Deadbolt work it over.
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Old 01-29-2009, 03:14 PM   #3
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Your 16g is not very small.... I wonder how anyone can classify it as the small 16g when they dont even sell it separetely anywhere. The small 16g sold everywhere is not your turbo.... it may or may not have the same compressor as the commercial small 16g, someone would need to measure inducer and exducer between the two... but there are other important differences between the two that affect flow and spool time such as comp and turbine housing design. That being said.....

Keep the 16g and dont do anything to it if you plan on auto x.
You want the absolute best feedback and spool up with this type of competition. Going bigger is only going to increase lag...
Your 16g is a very capable turbo...Your car is light, I would still look for ways to lighten the car, and with your listed mods you will be able to get around 350hp or so on pump and upper 3's on race gas or meth.
Again... this is being said after reading that you want to auto x the car.

..... now if you had said drag race...... ehhhh
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Old 01-29-2009, 05:55 PM   #4
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Don't change your turbo. Do everything else you have listed as upgrades and puch the Td05 as far as it will go. If you aren't happy at that point, reconsider turbo options.
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Old 01-29-2009, 05:57 PM   #5
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ofc, and in regards to the other "thing" i'll get on it later today
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Old 01-29-2009, 06:40 PM   #6
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Microtech uses MAP instead of MAF?
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Old 01-29-2009, 07:45 PM   #7
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idk, the guy im buying it from had it on a v2 ej20g.
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Old 01-30-2009, 03:55 AM   #8
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just curious, what injector duty cycles are you getting on your 816's. I have a set but i think they would be too far below the efficiency range on a 16g. or any reasonable turbo upgrade.
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Old 01-30-2009, 01:27 PM   #9
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havent bought them yet, looking at a few different pairs of them. So you dont think they would work?
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Old 01-30-2009, 02:28 PM   #10
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Quote:
Originally Posted by JDMFLCL View Post
idk, the guy im buying it from had it on a v2 ej20g.
If it runs the MAF, which I doubt, you will need to add a larger MAF to your list.

-Rob
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Old 01-30-2009, 03:16 PM   #11
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Quote:
Originally Posted by JDMFLCL View Post
havent bought them yet, looking at a few different pairs of them. So you dont think they would work?
They will probably work but that's a lot of injector for your setup and goals. I've got 650a in mine with the same turbo and a FXT TMIC and I don't expect to come close to 90% IDC. Just for refrence I ran JEC 720s on my STI with a 35r meth and 114 oct and saw ~85% IDC @ 27PSI.
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Old 01-30-2009, 07:23 PM   #12
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Quote:
Originally Posted by GShinji View Post
just curious, what injector duty cycles are you getting on your 816's. I have a set but i think they would be too far below the efficiency range on a 16g. or any reasonable turbo upgrade.
???????????? What kind of question is this?

Seriously... they are a little on the big side for his turbo, but any decent engine management will have them at the target af ratio. He will definitely not run out of fuel with that turbo on these.
Injectors dont have an efficiency range... they have a duty cycle... and when it is too high....... time for an upgrade.
The other issue with injectors is dead time... but again if he has a good engine management, then he can adjust and be all set.
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Old 01-30-2009, 09:33 PM   #13
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If you trying for about 370 crank hp it isnt gonna happen with the small 16g. Its rated for 505cfm which is only gonna get you around 340 at the crank which isnt too bad. You could go to the big 16 and get 550cfm which will put you at about 370 crank hp, but the cost of a new turbo to gain around 30hp isnt real good bang for buck. In my opinion go to the 20G to get 650cfm so crank horse will be about 500 ponies max. With the more effecient 20 you wont be at such a high boost level as you would be with a 16 to make your target power, therefore your intake temps wont be as high and it will be less likely to knock and other associated nasties that come with high intake temps. Plus if you wanted to bump up the power after your comfortable with 370 ponies all you gotta do is give it a couple more psi. Your injectors will definately be ample for a 20G, as long as your not running your factory fuel pump.
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Old 01-31-2009, 12:05 AM   #14
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Quote:
Originally Posted by Freedz View Post
If you trying for about 370 crank hp it isnt gonna happen with the small 16g. Its rated for 505cfm which is only gonna get you around 340 at the crank which isnt too bad. You could go to the big 16 and get 550cfm which will put you at about 370 crank hp, but the cost of a new turbo to gain around 30hp isnt real good bang for buck. In my opinion go to the 20G to get 650cfm so crank horse will be about 500 ponies max. With the more effecient 20 you wont be at such a high boost level as you would be with a 16 to make your target power, therefore your intake temps wont be as high and it will be less likely to knock and other associated nasties that come with high intake temps. Plus if you wanted to bump up the power after your comfortable with 370 ponies all you gotta do is give it a couple more psi. Your injectors will definately be ample for a 20G, as long as your not running your factory fuel pump.
Did you not see that he is building an auto x car....
also... he is not going to max at 340 at the crank with the 16g
Lastly... that is not the commercial "small" 16g sold everywhere .... and... Keep in mind that power output is not determined by comp wheel cfm alone!


He will have no problem meeting his hp goals with that turbo... much easier than any vf series... There are plenty of ej20g with over 300whp on the tdo5 16g. Plus his spool up time will be very important for the type of competition he is planning. His turbo will spool yesterday.

....... ha ha he said 20g for auto x
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Old 01-31-2009, 03:36 AM   #15
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Quote:
Originally Posted by blkgm8 View Post
???????????? What kind of question is this?

Seriously... they are a little on the big side for his turbo, but any decent engine management will have them at the target af ratio. He will definitely not run out of fuel with that turbo on these.
Injectors dont have an efficiency range... they have a duty cycle... and when it is too high....... time for an upgrade.
The other issue with injectors is dead time... but again if he has a good engine management, then he can adjust and be all set.
i just assumed that with the injectors possibly being at at extremely low duty cycles that it would be inefficient. Talked to someone at deutschwerks at he mentioned something about that, but then again i don't know much about this kind of stuff, learning as i go along. I guess I'll strap them on and i'll let you guys know what kind of idc's i get on the "small" 16g.
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Old 01-31-2009, 04:10 AM   #16
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Quote:
Originally Posted by GShinji View Post
i just assumed that with the injectors possibly being at at extremely low duty cycles that it would be inefficient. Talked to someone at deutschwerks at he mentioned something about that, but then again i don't know much about this kind of stuff, learning as i go along. I guess I'll strap them on and i'll let you guys know what kind of idc's i get on the "small" 16g.

Ahhhhh.... I get where you are coming from now... Yes they are borderline too big for that turbo and will need alot of trimming to get them at target.... but a proper engine management will get them in line. There are better choices for the 16g though..... 650's are a great set that come to mind.
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Old 01-31-2009, 11:29 AM   #17
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Quote:
Originally Posted by blkgm8
Did you not see that he is building an auto x car....
If thats the case then we should be recommending a ball bearing center section, not a journal bearing turbo.
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Old 01-31-2009, 12:38 PM   #18
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im considering hte port and polish, from reading the charts, it seems this turbo is only capable of around 350-370 crank horsepower then just goes sonic, how much would PnP help, or am i reading it wrong since it seems some people are making 300 whp on this turbo?

can i have some clarification?

Last edited by JDMFLCL; 01-31-2009 at 02:23 PM.
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Old 01-31-2009, 07:14 PM   #19
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Quote:
Originally Posted by Freedz View Post
If thats the case then we should be recommending a ball bearing center section, not a journal bearing turbo.
oh..... he wont need ball bearing with that turbo... Trust someone who has the exact same turbo on the exact same engine. He will spin it up nicely


As for the max output of the turbo... you are going to meet your stated goals at the beginning of the thread no problem. I would just run it like it is with large catless exhaust... and if you feel that you need more power at max.... then look into an upgrade.

... with your power to weight ratio, at over 300whp.. it will be hard for any street car to catch you..... and it will be an auto x monster
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