turbodreamz21

iTrader: (7)

So my buddy just picked up a 06 evo ix has full tbe and is running on stock internal wastegate.

My question is what is the easiest way he can swap from internal to a external wastegate?

Iv read that a few ppl pull off the turbo and weld the wastegate shut I also heard others put a downpipe that just seals it shut- any of these ideas good?

I lean more towards pulling turbo off- but he doesn't want to do a lot of work to the car

Lmk guys
Thanks !!!!

Mikey@Spec-Ops

iTrader: (17)

Fairly Easy. I would just get an O2 dump. Weld the internal flapper open and cut the dump tube about an inch from the flange, weld on a Tial 38mm MVS and re attach the dump tube to the other end of the Tial 38mm MVS.

This is exactly what I did on my car and I made 750whp on a FP Black. Must be working

Mikey

turbodreamz21

iTrader: (7)

Couldn't u just weld the internal shut and run a Turbo manifold that has a attachment for a Wastegate?

turbodreamz21

iTrader: (7)

Bump is there another way other then pullin off turbo and welding the internal shut

nollij

iTrader: (21)

Yes. You would ruin the twinscroll of it all but that will work. ETS was selling a dual wastegate stock turbo manifold a little while ago because the customer backed out. Unsurprisingly, they had a hard time selling it because of how much it cost. At that point, might as well get a T4 setup.

You can also just run an external downstream of your internal with the wastegate outlet seperate from exhaust.

turbodreamz21

iTrader: (7)

^is the stock evo 9 a twin scroll setup that welding the internal gate closed mess it up

turbodreamz21

iTrader: (7)

bump

ChrisCarey

iTrader: (38)

This is what we recommend, we tested it and removing the internal flapper did result in significantly slower spool. Keep the internal actuator in place with a straight boost source and run a second boost source with boost controller to the external wastegate

http://www.maperformance.com/map-com...-cg40-o2h.html

Mikey@Spec-Ops

iTrader: (17)

^ And that is exactly what I made for my car.

Mikey

sparky

iTrader: (1)

The stock wastegate actuator assembly IS "external". Only the flapper valve could be considered to be located "internally". You meant to write internal flapper valve, right?

sparky

iTrader: (1)

It's just my view but, the use of a setup such as the one Mikey and Chris are referring to may be slight overkill on a totally stock, and unported IX 16G turbo which is what the OP is asking about. This type of setup makes more sense on a full tilt, stock looking upgrade turbo such as the the Black, or the EF4, configured with relatively large wheels inside the stock housings.

For me you would be wasting your time and money installing the above described setups on the stock IX turbo. I am not taking anything away from the MAP unit. Theoretically at least, these setups have their place in more extreme applications. It just might be a little out of place on a totally stock 16G on a stock block motor. Just my O2 though.

turbodreamz21

iTrader: (7)

So generally speaking - pointless to go to a external wastegate setup on a stock ix turbo?

He mostly wants to do it cuz he loved the sound of external dump.

I figured you could remove ix turbo weld the flapper shut then just run a turbo manifold that had attachment for a external wastegate

Will the turbo be hurt or performance if the internal flapper gets welded shut ?

Mikey@Spec-Ops

iTrader: (17)

Pointless, kind of. The stock turbo doesn't flow the ammount of airflow to really increase boost out the top regardless of what wastegate setup you have. This type of setup will help but in order to hold more boost out the top you will need a huge boost sprike (freeboost). You also need to know, just because your boost is higher out the top doesn't mean you will make more power. Over spinning a turbo creates a lot of heat and will hurt power.

The OP should just get a normal 02 dump and keep the internal flapper. Just preload the actuator to help it hold more boost out the top. You can also, if on meth or E85, induce boost creep to help top end power. Just watch the tq numbers if you are on the stock block.

My .02 cents

Mikey

ChrisCarey

iTrader: (38)

Nope, I recommend leaving the internal flapper and the corresponding actuator in place with a direct boost source to keep the twin scroll effect. But yes I agree with you on a stock turbo this would be overkill.

ChrisCarey

iTrader: (38)

You would have to do a manifold mounted external wastegate (or two depending on how you do it) but in that scenario no it would not hurt performance.