Free Boosting?? - Toyota Nation Forum : Toyota Car and Truck Forums

MR2-Good-4-u · 04-09-2006, 10:44 PM

I think the problem with my car not reaching full boost until 5500 is because my wastegate is being stuck open all the time thats what im guessing because when i took my boost controller off it still reaches 15psi. But its almost like trying to fill a sink with the drain out... the more you turn the water on or in this case gas yea it will start to fill (boost) but not as quick.. so I talked to one of my friends with a mr2 turbo and he made the suggestion for me to close the wastegate totally and let the car "free boost". I didn't know you could do that. But if its not good for the car then i don't want to do it. Does anybody know if this would work or be a good idea?? Thanks!!

NESW20 · 04-09-2006, 10:58 PM

you DO NOT want to take your friend's advice. i'm sure it could hit over 20psi and very easily destroy internal (read: expensive) engine parts. namely your pistons, and if the detonation gets bad enough, maybe you could mess up a rod or two.

don't do it.

-Mike

***MR2Jedi*** · 04-10-2006, 12:35 AM

Mikes right-BAD idea! the stock CT26 can spike/boost 20psi of hot inefficient boost making for deadly detonation...the stock internal wastegate is nothing more than a metal flap on a hing. if it's not opening/closing correctly, then your accuator or one of it's hoses may be malfunctioning.

ST185 · 04-10-2006, 10:01 AM

They are right.
New turbo + wastegate set up are cheaper than rebuilding the engine

MR2-Good-4-u · 04-10-2006, 10:03 AM

OK... I was thinking that it was a bad idea. Thanks Guys. But how can i free my wastegate if it's stuck open?

JekylandHyde · 04-10-2006, 11:25 AM

If your wastegate was stuck open you would not be making boost at all ... or barely any.
Why not have someone qualified check out your turbo system?

MR2-Good-4-u · 04-10-2006, 01:42 PM

Because I want somebody who knows our cars and I don't trust anyone in my town to touch my car. Thats why i asked if anybody knew of any shops in Miami, Sarasota or tampa.

***MR2Jedi*** · 04-10-2006, 02:08 PM

I hear ya! I took mine to the dealer here in town just for an oil change and they opened the wrong end of the car. I understand alot of mechanics are not familiar with the MR2, but i DO EXPECT Toyota tech to know. So whenever I have work done I don't want to do (or can't) I have to drive 42 miles to Little Rock to some import specialists friends of mine.