Lost high boost...Help!

[87NAT]

I will first admit I have an exhaust leak...its not super loud but I can hear it pretty good. Would this be enough to drop from 22#'s of boost to around 17-18#'s? I have an external wastegate and I cranked down the spring pressure all the way and even opened up my air regulator all the way going to the top port of the gate. I was hoping this would bring it back up. It didnt.

I just installed alky and I am upset that I cant boost it up to test out the new kit. I plan on changing the gaskets today when I get off of work(felpro 1400's), but I want some suggestions for in case the exhaust leak does not fix my problem. I have had exhaust leaks in the past with other TR's and never noticed a major deduction in boost but then again I was not running the high #'s that I am now.

 

[QUIP'6']

I will first admit I have an exhaust leak...its not super loud but I can hear it pretty good. Would this be enough to drop from 22#'s of boost to around 17-18#'s? I have an external wastegate and I cranked down the spring pressure all the way and even opened up my air regulator all the way going to the top port of the gate. I was hoping this would bring it back up. It didnt.

I just installed alky and I am upset that I cant boost it up to test out the new kit. I plan on changing the gaskets today when I get off of work(felpro 1400's), but I want some suggestions for in case the exhaust leak does not fix my problem. I have had exhaust leaks in the past with other TR's and never noticed a major deduction in boost but then again I was not running the high #'s that I am now.

just cause you hae a exhaust leak doesnt mean its a gasket leak these cars are known for cracking headers because of the cheap steel mixed with 1600 degree heat and yes this would be enough to cause a loss of boost

 

[87NAT]

I have some TA performance headers I installed last year. About a month ago I heard a small tick. I went to tighten up the bolts and noticed the top back bolt by the firewall was gone . I figured that was my problem so I put a new bolt in with lock-tite and called it a day. The sound has gotten worse since then. I guess it blew the gasket out when the bolt came off and retightening the header made it worse. I have felpro 1400's on there right now. I am just hoping this small leak is my boost problem and nothing else.

I just cant see that small leak making that big of a difference, but maybe so.

 

[QUIP'6']

I have some TA performance headers I installed last year. About a month ago I heard a small tick. I went to tighten up the bolts and noticed the top back bolt by the firewall was gone . I figured that was my problem so I put a new bolt in with lock-tite and called it a day. The sound has gotten worse since then. I guess it blew the gasket out when the bolt came off and retightening the header made it worse. I have felpro 1400's on there right now. I am just hoping this small leak is my boost problem and nothing else.

I just cant see that small leak making that big of a difference, but maybe so.

I just cant see that small leak making that big of a difference, but maybe so.you would be surprised never a dull moment with these cars id does sound like a header leak put some copper rtv on the gaskets for double insurance also keeps the heat off the header gasket

 

[87NAT]

Well I changed the gaskets and it sounds much better but I still cant raise my boost past 17-18psi. What else am I missing?

 

[87NAT]

I took the deltagate apart, it seemed okay but the shaft needed a little oil to get moving up and down. After a test run it seems the boost is even lower....15-16 psi. Help!

 

[87NAT]

Fixed it! Now at 26 psi..feels great! Took deltagate apart again and used emery cloth on shaft to remove build up, it nows moves up and down smoothly.

 

[QUIP'6']

Fixed it! Now at 26 psi..feels great! Took deltagate apart again and used emery cloth on shaft to remove build up, it nows moves up and down smoothly.

dont stop there get your leak fixed also might gain a pound or to but should spool up faster. glad u found the problem