rotarydelight

I just blew up my 88TII motor because of overboost. I believe that my 3" downpipe, and catlesss 2.5" dual exhaust caused a lack of backpressure not allowing my wastegate to open and stop the turbo from boosting. How accurate does this sound? 3rd gear pull at WOT and my stock boost gauge was pegged!!! i hear that some boost controllers like the greddy one can open the wastegate earlier and at the same time i hear the opposite. i dont know, but i want to make sure that the next rotary i put in there will not blow just becuase of my exhaust

rotarydelight

nothing?...

RETed

Not very...
The freer flowing exhaust allows too much exhaust gases to run through the turbine section overrunning the wastegate - the wastegate is too small.


Not possible to open the wastegate earlier.


-Ted

rx7legend

i don't know bro, i have the same mods as you an the top psi ive seen on my boost gauge at wot is 11 and been running like that for a long long time, maybe youre wastegate line got off and youre psi keep going to the sky lol. ive seen it and have the same results as you.

RETed

Dude, you live in PR!
You guys see temps over 60F?
I would think most of the states can see temps close to freezing, and really cold ambient can cause creep!


-Ted

Carzy Driver

port your wastegate as per RETed kinda said. Check out the site in his sig if you need help, very helpful.

Michael Smith

wastegate diaphram leak?????