Losing boost at 6400rpm. Help!
- Thread starter suprahero
- Start date
buckshotglass
I love all your sounds.
Turbo Drifter;1139431 said:
Well, it shows up on the dyno as well so it's definately losing it.
buckshotglass;1139604 said:
You have a head full of nonsense, but I could use the shims. Hopefully they'll be some of the right sizes that I need. I'll send them back when I'm through so you'll have them. I may end up having to order a few of them if I can't find the correct sizes. thanks.
if you need shims jay, let me know what ones you need, i have all of my stock shims still and i can see if i have what you need (got all new ones with the cams)
Pm sent.
I know this is a dumb question because we've all went over it, but is their any more suggestions from anyone? There's no way that I"m going to be the one that stumps all of Supramania with a non fixable problem. Think hard gents.
IJ, you don't think there's anyway possible that the turbo could be running out of spool up top?
I know this is a dumb question because we've all went over it, but is their any more suggestions from anyone? There's no way that I"m going to be the one that stumps all of Supramania with a non fixable problem. Think hard gents.
IJ, you don't think there's anyway possible that the turbo could be running out of spool up top?
suprahero;1140015 said:
That turbo should not be anywere near its limit. Usally when you get to the turbos limit it will just blow hot air and lot make any more power the boost will not fall off. The only way I can see this being a turbo related issue is if the turbo is some how damaged (I know we have checked this already).
I ran a GT30R with a .6x A/R t3 housing on my 1jz at 25psi and did not have any problems making power or keeping boost.
I wish there was some way we could put another turbo on there and see if its still happening. Even though there was no damaged visable on the turbo I still feel this may be the culprit. I mean after testing everything else and verifing its working, flowing or sealed maybe time to look at the source of the boost again.
Jeremy
IJ.;1140339 said:
Its been doing since he blew up his first 2jz block. With a engine failer you never know what goes though them. A pice of metal may have gone into the turbine housing and taken the tips off the turbine wheel (the pictures of the turbine were not very clear) the inducer fins on the turbine wheel are very critical for flow and response. If they have been worn down with FOD or damaged at all it maybe the cause.
I guess I mainly say looks at the turbo again as he has done everything else.
As I write this though I rememeber/think Jay was saying it spools very fast if he pulls the W/G line.
Sigh, Jay I do not know I have given you every idea I have and nothing has worked. Im usally very good at sorting things like this out or resolving issues with things like this.
If I had a GT35R I would ship it to you for testing.
This is depressing.
Jostar;1140354 said:
Turbo bearings going bad will usally not cause this condition. Most times there is a big cloud of smoke and or the shaft brakes from the impeller hitting the cover. On DBB turbos such as Jays it would be smoking and sounds like loose change when you spin it.
Jeremy:dunno:
IJ.;1140339 said:
This only started after I melted the pistons and the four chunks of metal went somewhere, because there wasn't anything in the oilpan when I disassembled the motor. That's the reason I think it's the turbo even though when I reverse the lines on the wastegate it spools up very fast. I did visually check the turbo and it looked fine to me. I'm not an expert on turbos though and I didn't see one chipped fin.
Jeremy, thanks for your help and it seems all of us have run out of suggestions. I'm contemplating tearing the dam'd thing apart and starting over, but I don't feel it is mechanical at all unless it's the turbo.
suprahero;1140810 said:
Ok now that test there just put a shadow of doupt on the turbo theory. If the turbo was damaged it would not spool up notisably faster.
Damn damn damn......ok I would still try another turbo but honestly I'm at a loss. I think trying another turbo will if anything check somthing else off the list.
Good Luck my friend.
Jeremy
If nothing else, maybe this thread will help somebody else fix their similar problems before getting this far. I am enjoying all of the info, and will certainly reference the info in this thread before asking future questions. You tech guys are great! Keep up the good work.
buckshotglass
I love all your sounds.
buckshotglass
I love all your sounds.
If you do a part out, call me first... actually, have Vixen call me.
I could use that 2J somewhere.
I could use that 2J somewhere.