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evo III 16g vs. 20g

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Fb90gsT

15+ Year Contributor
97
0
Oct 24, 2005
Long Beach, California
Can you guys tell me the pros and cons for both of these turbos.....i plannig to upgrade and do not know which one is best.....i got a gst...so that might influence my desicison...
what is the max psi on these turbos?
What is the comparison in spool up time on these turbos?
which one flows more volume of air?
What are the pros and cons....advantages and disadvantages?
They both have a td05h housing...so does that matter?
Slowboy has the tho6h housing as an option...does that play a big part?
Does anyone have a pic of the tdo6h housing?
Thanks in advance for all the opinons that u might have.....
I'm just trying to make the best decision for my car...
:dsm: :talon: :thumb:
 
Number one when comparing turbos don't compare apples with oranges

Number two do a search...


The question you should be asking is not about the spool but about your goals... what the hell do you want? And then we will answer what kind of turbo you need. There are also several turbos that are in the middle of those turbos and better and worse...
 
First, I'm not taking away from EvolvingGST with this comment. A :notgood: for not researching these basic questions.

To help you not hat DSMTuners, I'll help you simplify your search...

1. A 20G
wheel flows more than an EVO 3 16G compressor wheel. But it is usually more expensive.

2. A true 20G has a 7cm^2 turbine housing and a TD06H turbine wheel. This REALLY helps up top but makes for slower spool. All 16Gs have TD05H turbine wheels and 7cm^2 turbine housings.

3. You can get a 20g compressor wheel mated to a TD05H turbine wheel & 7cm^2 turbine housing . Almost as fast a spool as a 16G. But, you can't fully tap the full potential of the 20g compressor wheel because you can't get the exhaust gasses out of your engine as they are bottlenecked at the TD05H turbine wheel and 7cm^2 turbine housing.

4. Your FWD:
200-300whp: EVO3 is all you will need​
300-400whp: You'll be pushing the EVO3 a little but if this is all you want then don't pay more...If you're looking for a good 1320 time, lag is your friend :thumb: . So I'd say TD06H 20G​
400-500whp: You'll want that higher flowing turbine housing and get a set of cams and call it a day...lag no longer helps :notgood:
 
matt I really appreacitate your input on this...it gave me a lot to think about....
I do not know why evolving gst would say all that.....If what i am asking are simple basic questions...why couldn't he just give me simple basic answers....if he had the time to say all the things that I did wrong... why just he doesn't help me out on where I can get the information...he just states u need to research on these simple questions, but doesn't tell me where.....oh well, I thank you matt. :dsm:
 
seeing youre in cali, i too would keep things on the MHI side, and go with the 20g. going to a 16g from a 14b just isnt enough of a difference to warrant the money spent. plus the 20g still looks like the stock 14b to the naked eye, ricers, and smog testers. sleeper style. plus youre FWD so a turbo with more lag helps, gives you more top end where fwd shines, and since it takes longer to spool, 1st, 2nd, and 3rd gear might not be as useless as, say, my evo 16g hitting 20psi@3400rpm and roasting tires in 3rd gear pulls.
 
Fb90gsT said:
I do not know why evolving gst would say all that.....If what i am asking are simple basic questions...why couldn't he just give me simple basic answers....if he had the time to say all the things that I did wrong... why just he doesn't help me out on where I can get the information...he just states u need to research on these simple questions, but doesn't tell me where.....oh well, I thank you matt. :dsm:
He gave a reply like that, because you could have easily searched the answers on these forums. When you first get into on of the forums on the top right where the threads begins, it has a tool that says search this forum. you enter key words, and it gives you threads which included your key words. you could have easily but "evo 16g 20g spool" and a couple of threads would have come up and you could have found out your answer to the spool up times for both turbos.

Fb90gsT said:
1.what is the max psi on these turbos?
2.What is the comparison in spool up time on these turbos?
3.which one flows more volume of air?
4.What are the pros and cons....advantages and disadvantages?
5.They both have a td05h housing...so does that matter?
6.Slowboy has the tho6h housing as an option...does that play a big part?
7.Does anyone have a pic of the tdo6h housing?
1. It all depends on your supporting mods. I have seen 16g boost as high as 23-24 psi, I can't really remember which i read before. And a friend of mine was boosting 29 psi at the track with no problems.
2. The 16g spools real fast in comparsion to a 20g. But since the 20g spool slower(lag) you can benefit from it since your FWD.
3. The 20g will outflow the 16g
4. Pro 16g spools fast;however can not flow as much as a 20g. The 20g can outflow the 16g by alot but you will scarfice spool up, but that is good for you since your FWD.
5. Yes they both ahve a td05h, but the true 20g has td06h turbine wheel.
6. I would get the td06h housing
7. Here a link to a pciture of a 20g FP 20G

There are alot of other turbos besides these two. Both of these are great turbos. If you were going to go with either of these two I would go with the 20g. It has more lag(which is good for you since your FWD), and it will flow more then the 16g. Have fun and stay boostin :thumb:
 
I love my 20G, it spools around 3500rpm, it's being rebuilt right now and I have a 14b on for the next week or so, and it spools a lot lower and builds up faster, where my 20G (with the TD06 housing) builds up a little slower, but it's full tilt 20+psi by 4500rpms,

I've rode with a few friends with s16g and B16G and they spool fast and low, but they sorta fall off up high, where as mine keeps ya pushed into the back of the seat all the way up.

There are other cheaper but as good turbos out there, most people run the 20G as it is a proven turbo(old school maybe but still)

What you need to look at is 1. do you have the other mods to support a 20G and how much do you want to spend. I have to put the FMIC on as it's a knock monster on the Stock Side mount.
2. would an other turbo get you what you want and be cheaper(so you can get other mods)

I hope this helps.
matt
 
Just to clear up a common misconception here. Lag is not what makes a larger turbo more FWD friendly. The manner in which larger turbos make power is a lot more linear, with smaller turbos like the 16g, spool is so quick and instant that peak torque is usually created as soon as boost hits. This accounts for the roasting of tires. With a larger turbo, boost and therefore power is made in a linear fashion, rising until it plateaus since there is no sudden shock the tires are less apt to spin until you are making so much power that the tire cannot provide any more forward movement. :thumb:
 
Just so we are all on the same page here, you have the fllowing mods *and no furel upgrades, correct?

Bolt-on Mods: TuboXs Boost Controller Greddy B.O.V 3" Custom Intake AEM Cam Gears Custom External Dump Custom Headers Six puck Clutch w/ Pressure Plate Chromoly Flywheel ARP Head Studs

Engine Internals:Rebuilt Stock Head Ross 8.5 Eagle Rods Balanced Crankshaft Balance Shafts Removed


So you understand, you will need to spend some bucks on the fuel setup to use the turbo to it's full advantage. Either one of these turbos you will have to keep the boost down to 10 lbs until yopu get all the fuel mods.

And the 20G is going to spool slow as heck with stock exhaust!

Is your 14B going bad or you going to upgrade purely just because you want to?

If it's cause your turbo is going out, you might just want to stick with the EVO 3 16G for now, IMHO.

If it's a planned upgrade (just cause you want it, not cause the stock turbo is dyin'), then I would get the 20G. But it's gonna suck ass with stock exhaust and fuel!

"what is the max psi on these turbos?"
Damn good question but you won't be finding out real soon unless you got some bucks or you got the SAFC, Injectors, FPR, and Exhaust...

Yeah this has been gone over in so many threads, I wouldn't be suprised if they locked it.
 
50 trim yes, but its far more pain in the ass to put together rather than the 20g.


with the t3/t4 turbo its hard to find out the correct o2 housing, and then you also have to get a t3 flanged exhaust mani...
 
my98GST said:
50 trim yes, but its far more pain in the ass to put together rather than the 20g.


with the t3/t4 turbo its hard to find out the correct o2 housing, and then you also have to get a t3 flanged exhaust mani...

You do know there are 50 trims that are bolt-on. Bullseye and SBR offer 50 trims that bolt right onto your stock components.
 
my98GST said:
50 trim yes, but its far more pain in the ass to put together rather than the 20g.
harldy.

my98GST said:
with the t3/t4 turbo its hard to find out the correct o2 housing, and then you also have to get a t3 flanged exhaust mani...
Where have you been? The newest turbo fad is the direct bolt-on T3 garrett turbos. Every vendor and their brother is selling them......
 
all the ones i've seen have no o2 housing and when i contact them they say. I don't know. I bought it without the o2 housing and cant figure out which one to use.

I've always been more partial to mitsu turbos, but i'd like to get into the t3/t4 series...
 
:toobad: Rookies.

Anyhow, the evo3 is an awesome turbo. For a FWD its about all you need for any daily driver. With a decent traction setup (i.e. suspension, good quality tires. lsd insert) I still spins the tires in 2nd (but the car pulls ahead strong still), and then it hooks all day long in 3rd. I run about 24psi on a daily basis. However, on race gas and the same boost, I can get the tires to break loose in 3rd just by flooring it at around 60 mph.

50 trim, for the brief time I had one that worked, I could barely manage traction in 3rd at 23psi on pump gas. Being a FWD, lag is not a traction saver, not making any power is. So if you go w/ 16g, 20g, 50 trim, etc and expect to make some decent power, just know that you will need to learn how to drive to maintain traction.
 
my98GST said:
all the ones i've seen have no o2 housing and when i contact them they say. I don't know. I bought it without the o2 housing and cant figure out which one to use.

I've always been more partial to mitsu turbos, but i'd like to get into the t3/t4 series...
If you purchase one of the bolt-on garrett turbos from one of our vendors (SBR, AGP, Bullseye, etc.....), it will come with a turbine housing that bolts up to the stock Mitsu. manifold. Also, any Mitsu-style DSM O2 housing will bolt up to it (stock or aftermarket).
 
Spoolin4Ever said:
Just so we are all on the same page here, you have the fllowing mods *and no furel upgrades, correct?

Bolt-on Mods: TuboXs Boost Controller Greddy B.O.V 3" Custom Intake AEM Cam Gears Custom External Dump Custom Headers Six puck Clutch w/ Pressure Plate Chromoly Flywheel ARP Head Studs

Engine Internals:Rebuilt Stock Head Ross 8.5 Eagle Rods Balanced Crankshaft Balance Shafts Removed


So you understand, you will need to spend some bucks on the fuel setup to use the turbo to it's full advantage. Either one of these turbos you will have to keep the boost down to 10 lbs until yopu get all the fuel mods.

And the 20G is going to spool slow as heck with stock exhaust!

Is your 14B going bad or you going to upgrade purely just because you want to?

If it's cause your turbo is going out, you might just want to stick with the EVO 3 16G for now, IMHO.

If it's a planned upgrade (just cause you want it, not cause the stock turbo is dyin'), then I would get the 20G. But it's gonna suck ass with stock exhaust and fuel!

"what is the max psi on these turbos?"
Damn good question but you won't be finding out real soon unless you got some bucks or you got the SAFC, Injectors, FPR, and Exhaust...

Yeah this has been gone over in so many threads, I wouldn't be suprised if they locked it.

I am mostly planning to upgrade just because.....and I understand what you are saying when it comes to stock fuel and exhaust..well the exhaust is going to come first...then I am planning to get a dsm link....after that I will upgrade my fuel and then upgrade that turbo....Does it sound like a pretty good plan?
and since I am newbe when it it comes to tunning I just might go get it dyno tuned...do u think it's worth it?(dyno tuned)....
I live in long beach california and the thing is I can't seem to find a shop where they only deal with DSMs...... :mad:
 
Fb90gsT said:
My stock turbo pulls great...How far do you think I can go with this turbo? :dsm:
The 14b can take you a long ways. I seen many people run 12's on the 14b. And only of a handful of people of ran 11. And on dsmtimes.org there is only on 14b that is running 10's. It can get you a long way, but I would say low 13's and even 12's are achievable w/ a 14b.
 
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