Turbo Problem

dunewarz · 12-04-2009, 07:29 PM

Mklll don't come with wastegates. I think you're referring to a blow off valve. It could be stuck closed which will cause a large amount of pressure build up in your pipes.

cre · 12-04-2009, 07:47 PM

Quote:

Originally Posted by dunewarz

Mklll don't come with wastegates. I think you're referring to a blow off valve. It could be stuck closed which will cause a large amount of pressure build up in your pipes.

You are dead wrong.... the CT-26 uses and internal wastegate. The wastegate actuator is the round metal can with the rod coming out that is mounted to the CT-26.

BOVs do not vent from boost; They vent when the actuator sees vacuum. They are not a device for controlling boost levels.

Cyto, wastegate actuators are generally not cheap. I would start with trying to find a used one to swap in. Have you actually tested the wastegate to see if it is likely that it's sticking?

Cyto · 12-04-2009, 10:49 PM

When the HG blew, he had to take everything off, when he put it back together, he found out that water had gotten in the exhaust and melted the honeycomb in the Cat, at first he thought it was the wastegate. The problem: not wanting to rev up.
Solution: Gutting the Cat of everything(straight pipe down the back now).

cre · 12-04-2009, 10:54 PM

Quote:

Originally Posted by Cyto

water had gotten in the exhaust and melted the honeycomb

Utter bullshit. Water is always flowing past the cat, it's a natural byproduct of the combustion process... besides, ceramic, platinum, manganese, iron, nickel, palladium and rhodium are not water soluble and all have a much higher melting/burning point than water could ever achieve...

Cyto · 12-04-2009, 11:01 PM

Quote:

Originally Posted by cre

Utter bullshit. Water is always flowing past the cat, it's a natural byproduct of the combustion process... besides, ceramic, platinum, manganese, iron, nickel, palladium and rhodium are not water soluble and all have a much higher melting/burning point than water could ever achieve...

All that was said by a local mechanic, I figured it was stupid. I didn't question it though, however; he did completely strip everything out of the converter.
I'm not too car savvy, so bare with me? lol

cre · 12-04-2009, 11:21 PM

I wasn't questioning your intelligence... I was pointing out that that remark was either based in pure ignorance or it was a complete fabrication for who knows what reason.

Cyto · 12-04-2009, 11:31 PM

Its k, he's a drunk redneck... So you're not offending me in any way...

dunewarz · 12-05-2009, 02:46 AM

Quote:

Originally Posted by cre

You are dead wrong.... the CT-26 uses and internal wastegate. The wastegate actuator is the round metal can with the rod coming out that is mounted to the CT-26.

BOVs do not vent from boost; They vent when the actuator sees vacuum. They are not a device for controlling boost levels.

Cyto, wastegate actuators are generally not cheap. I would start with trying to find a used one to swap in. Have you actually tested the wastegate to see if it is likely that it's sticking?

Actually BOVs do vent boost. Waste gates prevents boost from occurring by venting exhaust gas from the turbo fin.

dunewarz · 12-05-2009, 02:47 AM

You'd have high boost lag if your turbo was running full boost. You'd have high acceleration if your BOV was stuck closed.

rob87 · 06-03-2011, 05:21 PM

What about the other way around to the original posting. No turbo boosting or very little according to the gauge and hearing a whining pitch sound when you should be getting boost from the turbo?

Would it be a bad turbo unit, wastegate or BOV?

This just started happening to me and not sure what to tackle or look for to confirm what is wrong.

87 turbo manual trans
rob87

12-04-2009, 10:49 PM	#3
Cyto 3" Exhaust Join Date: Jul 2009 Location: USA Posts: 103	When the HG blew, he had to take everything off, when he put it back together, he found out that water had gotten in the exhaust and melted the honeycomb in the Cat, at first he thought it was the wastegate. The problem: not wanting to rev up. Solution: Gutting the Cat of everything(straight pipe down the back now). __________________ Proud owner of a 1988 Toyota Supra Turbo, 105k Miles, and great condition. I might have to sell it to help pay for school so here's the link. http://www.toyota-supra.info/forums/...html#post72357

12-04-2009, 11:31 PM	#7
Cyto 3" Exhaust Join Date: Jul 2009 Location: USA Posts: 103	Its k, he's a drunk redneck... So you're not offending me in any way... __________________ Proud owner of a 1988 Toyota Supra Turbo, 105k Miles, and great condition. I might have to sell it to help pay for school so here's the link. http://www.toyota-supra.info/forums/...html#post72357

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12-04-2009, 07:29 PM	#1
dunewarz 3" Exhaust Join Date: May 2009 Location: WhiteBear Posts: 54	Mklll don't come with wastegates. I think you're referring to a blow off valve. It could be stuck closed which will cause a large amount of pressure build up in your pipes.

12-04-2009, 11:21 PM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I wasn't questioning your intelligence... I was pointing out that that remark was either based in pure ignorance or it was a complete fabrication for who knows what reason.

12-05-2009, 02:47 AM	#9
dunewarz 3" Exhaust Join Date: May 2009 Location: WhiteBear Posts: 54	You'd have high boost lag if your turbo was running full boost. You'd have high acceleration if your BOV was stuck closed.

06-03-2011, 05:21 PM	#10
rob87 Stock Join Date: Apr 2010 Location: Belvidere IL Posts: 27	What about the other way around to the original posting. No turbo boosting or very little according to the gauge and hearing a whining pitch sound when you should be getting boost from the turbo? Would it be a bad turbo unit, wastegate or BOV? This just started happening to me and not sure what to tackle or look for to confirm what is wrong. 87 turbo manual trans rob87