I have been wanting to do an upgrade to my turbo. I have currently what's in my mod list and I was interested in the 21G upgrade because it is budget friendly and gives a decent increase in power. I was going to do a tubular manifold and O2 housing along with the 21G. Buschur did testing on this and said that it had surging problems so now I am not sure that I want to run the 21G. Is the TME turbo worth upgrading to? I have an 04 so I know the TME comes with the 10.5 hotside that I don't currently have. Would I just be better off keeping the stock turbo and buying the hotside and a tubular manifold?

 

You'd be better off doing a cam combo and then worrying about a turbo upgrade... I mean that sincerely.

 

That was the other option. Doing HKS cams and fuel pump with tubular manifold, 10.5 hotside, and O2 housing. I'm trying to stay away from a full turbo upgrade for price and reliability reasons. That's why I thought the 21G would be a good choice but it isn't looking so thus far.

 

give the "21g" a little more time for testing,and people to put on there evos to have a first hand reply on them before you spend your cash.i would also buy cams before any thoughts of any turbo

 

I agree, I think cams might be a better first step.. Give the 21G some time to get some shakedown with a few different people and try to wait for some firsthand evaluations.

 

that's a much better route. this is where i went as well. when i plan to get more go-fast mods i will look into a 10.5 and a manifold.

 

Thanks for the advice guys. I will probably go with the cams first and then do possibly the 21G later after more people have tested it.

 

your a smart man Evo007

 

I've tuned the first 21g in houston and i must say it isn't all that impressive. Only 7whp gain from swapping turbos. Didn't have to change much on the afc but the avcr needed a bit more work since this turbo lags up to 3700rpms. It spools very slow aswell. Takes awhile to hit full boost. So i don't think this 21g is worth it. Btw, boost still tapers down to about 18 psi at redline.

 

I think the tme is a good way to go for the turbo.. better spoolup and more power up top than the stock turbo. but before you do that you should do the cams first. then the turbo will compliment the cams and vice versa. u can probably do all of it for under 2grand.

 

few options besides what's been listed, i foudn that after much research that the stock turbo is a good thing to keep modding cuz it has unsurpassed spool and reliability, plus you can swap back with ease if you ever need to pass emissions (visually). the 3071 will spool faster than stock evo but not faster than the stock turbo is ultimately capable of. that's given so...

if you want the ultimate spool up turbo you should prolly look into the evo 9 turbo (has revised comp side and the 10.5 hot side and then you can look around for a tme titanium center cartridge assembly nad you'll have yourself the fasting spooling turbo that holds the most boost out of any of the mitsu turbos available in the us.

now if you go on the europe side of things you can look into that wrc400 turbo but that things is a lotta money.

the 21g is looking very dismal right now... the wheel is going in for another revision and it's prolly gonna come out with a skinnier hot side wheel which means more lag... you can't get the comp side's increase without giving something up on the exhaust side... and it looks like surge porting or surge ring wasn't gonna cut it for br..

 

There are some good ideas in here about the Evo 9 turbo. I'll probably do my cams and the manifold\O2 housing along with the hotside on my stock turbo because I wanna have the 10.5 hotside regardless. When the Evo 9 stuff becomes available I may upgrade at that point. I am disappointed in the 21G though. I've been following the thread.

 

i share your sentiments about the 20g... luckily i don't need 400 hp to do what i wanna do...

 

Finally.

We are now ready to release and sell the new bolt on 21g turbos.

I tested the newest version of this turbo this morning and I am very happy with the results.

Spool up is very close to the stock clipped turbo that was on the car. I am getting over 20 psi by 2800 rpm in 5th gear with the car.

The boost doesn't spike as much as it did with the stock turbo, it is hitting 23 psi and then holds 21 psi to redline. This is much better than the stock turbo which will hit 25 psi on the spike and be down to as low as 16-17 psi by redline.

This turbo unclipped gained 2+ mph in the 1/4 on my RS a few weeks ago. We clipped the turbine wheel to get rid of the compressor surge problems we were having with it.

The turbo has NO surge on my car while accelerating now.

I will get to the track next week and do some testing.

These will only be available clipped as they surge violently without the clipping.

The clipping increases the exhaust flow.

David Buschur
www.buschurracing.com

 

What's the price gonna look like on these?