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Old 08-11-2014, 04:47 PM
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New Turbo?

Hey guys I think it may be time for a new turbo. My boost is really low while cruising and my EGTs climb up to about 900 at 60 mph. I thought that swapping in the 4.56 gears would help put some load on the turbo but it still never sees more than 18 psi wide open. I was looking at the Powermax stage 1. I don't tow too much very often these days just over the Oregon mountains once in a while with a small ski boat. Would It be worth it to get the $1300 powermax or just a stock replacement. Going to put new Dieselsite boots on it while I'm at it. Any input is appreciated.
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Old 08-11-2014, 05:27 PM
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I've driven in the mountains on the 5 through Oregon with a powermax. With proper tuning it will be just fine. And if you have larger tires I'd suggest regearing. I'll pm ya a price on a turbo.

While your in there it may be a great idea to upgrade your up pipes to heavy duty bellows. I'll pm you a price on those as well

Last edited by ODAWG714; 08-11-2014 at 05:33 PM.
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Old 08-11-2014, 05:44 PM
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My bad I just saw you slapped in 4.56s. The gears should have helped a lot. Is your truck making any type of strange whistle sound? Any smoke at idle?
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Old 08-11-2014, 05:46 PM
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Quote:
Originally Posted by ODAWG714 View Post
I've driven in the mountains on the 5 through Oregon with a powermax. With proper tuning it will be just fine. And if you have larger tires I'd suggest regearing. I'll pm ya a price on a turbo.

While your in there it may be a great idea to upgrade your up pipes to heavy duty bellows. I'll pm you a price on those as well
Thank you! Almost sounds like I'd be better with a stage 1 rather than a 1.5? Not really going to be racing it too often. Long drives over steep grades mainly. I'd like to keep EGTs as low as possible and drivability smooth. What are your thoughts?
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Old 08-11-2014, 05:52 PM
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Stage 1 all the way for them grades you guys have.ill pm you my number
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Old 08-11-2014, 05:59 PM
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If 900 is the max and it's low while cruising then I don't see the issue
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Old 08-11-2014, 06:02 PM
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Originally Posted by Heavy_GD View Post
If 900 is the max and it's low while cruising then I don't see the issue
No... No, it's 900 cruising at 60 on a flat to slight up hill. 1050 if I'm not paying attention.
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Old 08-11-2014, 06:04 PM
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Quote:
Originally Posted by ODAWG714 View Post
My bad I just saw you slapped in 4.56s. The gears should have helped a lot. Is your truck making any type of strange whistle sound? Any smoke at idle?
Truck definitely feels better with the gear change as far as rpms and shifting like a stock truck but I don't think it really helped much with the boost or EGT. It always has made kind of a funny whistle, no smoke at idle. Thinkin boost leak?
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Old 08-11-2014, 06:06 PM
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You may have a boost leak. Check your cac boots especially the one on the turbo compressor outlet.

Also check your bellows on your up pipes
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Old 08-11-2014, 06:17 PM
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I would say you have a boost leak, before going to a new turbo you need to find out what the issue is. I have seen too many people swap turbos for a problem only to get mad when the new turbo still does same. If you have monitor which you should look at VGT duty cycles to make sure it is doing it's job, but I would have to say you have a boost leak on the exhaust side, probably the bellows on y-pipe, on even exhaust manifolds loose. Easy to check just find a trusted friend and have them brake torque the truck, if smoke comes from under hood there you go. By the way don't go crazy on the brake torque, just hold brake in gear and give it a steady small amount of pedal. Better to do quick checks to rule things out.
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