How to get boost up
Thread Starter
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Fleet Mechanic
Joined: May 2005
Posts: 1,567
Likes: 3
From: Chattanooga
How to get boost up
Ive posted a couple time with questions and here is what ive found.
I have no idea what stock boost will read on a 2000
An exhaust leak will get those temps up and keep the boost in teens.
The most I can get with a 75hp chip and a 6gun tuner is 22.
And now a new culprit, the ebpv came on when cold and I can hear a high pressure leak somewhere near the pass battery. Leaks leaks everywhere......argggg. Anyway where are those neat tube replacements or the rubber high pressure tubes. I like heatstrokes pictures. I believe Kwik or cookie 88 will lead me to my salvation.
I have no idea what stock boost will read on a 2000
An exhaust leak will get those temps up and keep the boost in teens.
The most I can get with a 75hp chip and a 6gun tuner is 22.
And now a new culprit, the ebpv came on when cold and I can hear a high pressure leak somewhere near the pass battery. Leaks leaks everywhere......argggg. Anyway where are those neat tube replacements or the rubber high pressure tubes. I like heatstrokes pictures. I believe Kwik or cookie 88 will lead me to my salvation.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
stock boost should be 15-17 psi in the most stressful conditions, with the wastegate activated. unplugging the red line will maybe raise a peak boost 2-5 pounds.
the hissing noise is probably from the EBP sensor (exhaust back pressure). it is attached to the front most part of the right side exhaust manifold. get under the truck and look up, there should be a small tube coming up. there is a sensor on the end and this is where the boost is probably leaking. the EBPV creates up to 20psi restriction between the valve and manifolds, so alot of the exhaust is probably going out of this leak.
the hissing noise is probably from the EBP sensor (exhaust back pressure). it is attached to the front most part of the right side exhaust manifold. get under the truck and look up, there should be a small tube coming up. there is a sensor on the end and this is where the boost is probably leaking. the EBPV creates up to 20psi restriction between the valve and manifolds, so alot of the exhaust is probably going out of this leak.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Yeah, find and fix any leak that you can. Also remove the pressure line from the wastegate control valve where it goes into the Y-pipe. Disconnect both the green and the red lines from the canister and from the rubber air boot. Plug the hole in the boot. Adjust the spring tension tighter on the wastegate control rod. Take the Y-pipe out of the engine, the intercooler tubes out. Completly degrease all the blue and the orange boots. Clean and degrease all the tubes and y-pipes. If you have time and have not already done it, do the CCV mod. Put it all back together, leaving the wastegate control hose disconnected. With that 75 HP chip you should get at least 27+ PSI of boost at WOT 2500 RPM.
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
No...all the replacements I've seen are pretty spendy. Are you haveing a problem blowing the boots off? You don't really "need" to replace them if you aren't, unless they are damaged.
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Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by kennedyford
Ahh what I needed to know, so that tube may poss be leakin. And thanks kwik, I pulled the red and plugged it but I didnt know to plug the green also. CCV mod is next.
Every little bit leaking out = loss of boost.
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New User
Joined: Dec 2005
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Originally Posted by kennedyford
O by the way, is there a cheaper way to replace those blue or orange boots?
4-Star Hose
Pyrtek
etc.
Formerly BUICKTURBO
Thread Starter
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Fleet Mechanic
Joined: May 2005
Posts: 1,567
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From: Chattanooga
Once again Kwik to the rescue
Silly me left the ebv line off the manifold when I finished milling the manifold, Big!!!!!! exhaust leak. Fixed it and followed Kwiks advice and pulled all lines red and green and made a schnazzy plug and bypass. The end result is hard to keep the tires from spinning on setting 6, but Im still not getting any higher than the 22 or there abouts boost. Spools up quick but now do I need a blow off valve?
Thread Starter
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Fleet Mechanic
Joined: May 2005
Posts: 1,567
Likes: 3
From: Chattanooga
[QUOTE=7.3HAIRDRYER]Go find a local hydraulic hose store. They sell the silicone impregnated boots in any length. Some of those cost near $26/foot, but you only need about a foot or so.
4-Star Hose
Pyrtek
etc.
thank you for that info.
4-Star Hose
Pyrtek
etc.
thank you for that info.
Postmaster
Joined: Jun 2005
Posts: 3,438
Likes: 0
From: New Hampshire
Check the Y pipe.
Make sure there are no imperfections and bumps on the y pipe boot mating surface as this will cause a leak no matter what...u can grind down imperfections easily to provide a smooth good sealing surface with the boots.
Nut
Nut
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
Originally Posted by kennedyford
Spools up quick but now do I need a blow off valve?
Thread Starter
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Fleet Mechanic
Joined: May 2005
Posts: 1,567
Likes: 3
From: Chattanooga
I was wondering because of the noise it makes when I get off the throttle and also the chittering this truck makes when about 18 lb of boost and a shift. It almost sounds like the blade is cavitating. Hmm. I have the 6637 and ww.
Postmaster
Joined: Nov 2003
Posts: 3,595
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From: Utah County, UT
when you did the WW, did you check the turbo for play? Sounds like everything is tight. You might fashion some type of jig to actually pressurize the intake side and see if there are any leaks that you are missing or not hearing when the engine is on. I have a pre 99 turbo, smaller than what is used on 99+ and can easily make 26 lbs.
On another thought, is the wastegate seating down properly/all the way? If it is not fully closing off that would definate lead to some loss of boost.
On another thought, is the wastegate seating down properly/all the way? If it is not fully closing off that would definate lead to some loss of boost.
Last edited by cangim; Jan 16, 2006 at 06:01 PM.