Carlsbergas

So this thing happened twice in a week i was going flat out on 3rd gear around 21psi boost when suddenly car starts to lose its power looked like missfire, but while it was "missfiring" i heard some strange clanking noise on the driver side and it was loud (i was going next to the wall) my first thought that turbo blades were touching the walls in the turbine.. anyway, i went again full boost all gears up to 4th, and nothing.. car just ran fine.. any ideas?

Should i start saving money for bigger turbo or rebuild?

Black51

What do the blades look like?

Carlsbergas

Didnt check yet, going to do that next week when replacing the timing belt,
Can a stock turbo get up to 21-22 psi?

Black51

Yes it can.

CyCloNe!

The turbo can do 20+ psi but it is out of its efficency range, and your blowing hot air into your engine which can have a very bad side effect. I would keep boost around 15psi... Pull the j-boot and check the blades, also check the movement in and out and side to side. Blades look grinded then it needs a rebuild, side to side touches housing or moves a good amount needs a rebuild, if you have in and out play pretty much at all needs a rebuild. I wouldn't boost it till you check it out, if a piece of metal comes off into your engine a turbo will not be your biggest paper weight.

Mikes-951

Also, at that much boost on a stock boost you have alot of back pressure in the headers and engine. I would be careful.

odurandina

they have to learn the hard way...

Carlsbergas

Alright, thanks for the feedback guys, ill dial the boost to 12psi and check the turbo tommorow or the next day when ill be free

Mikes-951

Stock turbo I ment, sorry, 4th of July and all

Carlsbergas

well i was coming back from my friend, so i droped boost to 8psi.. it was just too slow lol, so raised it to 15psi, no missfires no sounds nothing, car runs great, but i will be checking that turbo tommorow, just to make shure everything is in order

black944 turbo

What is done to the car?????

If you are on stock injectors, you are asking for trouble!!! Ther is no way a stock car with stock injectors can handle this much boost for long and you ARE HURTING the car!!!!

Carlsbergas

this is a list of mods i know:
List of mods
full billy boat catless exhaust
wrapped header
lindsey racing adjustable wastegate
with manual boost controller in cabin
weltmeister chips
wide fire head gasket
lindsey racing blow off valve
lindsey racing short shifter
auto meter boost gauge
goodrige stainless brake lines
lindsey racing adjustable fuel pressure regulator and gauge
momo steering wheel
nardi shifter
bolt in roll bar
sparco evo and evo plus seats
seabelt 5 point harness driver and passenger
accusump system holds extra 1.5 qts oil
bigger sway bar front
hardened 1st and 2nd gears.
its sitting on coilovers,
has lindsay racing camber adjustment,
injectors are not stock,
i dont know full list of mods, since previous owner didnt do them, it was the guy before him, i was able to contact him, but he just doesnt remember all of the details..

User 52121

Could it have been detonation you were hearing?

It's often described as a "metal can full of marbles"

Carlsbergas

that doesnt sound to good..
anyway just checked my spark plug wires.. looks like i will be replacing them too, they are trowing sparks all over the place, maybe thats why it was missfiring so bad


edit. what can cause detonation??

odurandina

e-15