I HAVE A H-1 TURBO ON MY 92' 1 TON. IT SOUNDS LIKE THE TURBO IS SKIPPING AT A CERTAIN RPM IT STILL HAS PLENTY OF BOOST AND I ALREADY HAD A STRAIGHT PIPE AND I NOTICED IT AFTER I TOOK THE AIR FILTER BOX OUT AND RAN WITH JUST THE AIR FILTER IS THIS NORMAL.

 

Skipping? My suggestion first off would be to take the filter intake hose off of the inlet of the turbo. Look over the compressor wheel carefully. Look for any signs of the wheel rubbing the compressor housing. Also, be sure and take your finger and move the compressor wheel up and down and from side to side to check the end play. You will have some endplay. Just make sure that when you are moving the wheel from side to side with you finger, turn the wheel with your other hand. If it touches in any way or binds against the compressor housing, then the bearings are shot.

 

I TOOK BOTH HOUSINGS OFF TODAY AND LOOKED FOR ANY DAMAGE AND CHECKED FOR ANY PLAY,HAD ALITTLE BUT NOT ENOUGH TO MAKE THEWHEEL HIT THE HOUSING I PUT A 16 CM HOUSING ON IT 8000 MILES AGO AND IT HAS 80000 MILES ON IT NOW AND I ALWAYS LET IT COOL DOWN BEFORE SHUTOFF IDIDN'T FIGURE THE BEARINGS WOULD BE WORE OUT SO QUIK WITH ONLY 80000 MILES IT NEVER DID IT UNTIL I TOOK THE AIR FILTER HOUSING OFF YESTURDAY COULD IT BE SOMETHING ELSE

 

Are you sure it isnt the whine of the turbo you hear spooling up due to the increased air?

 

I think what you are hearing is commonly referred to as "barking" the turbo. Basically, it's when your turbo is suddenly supplying more air than the engine can take- such as when shifting, or letting up quickly on the throttle while accelerating hard. You get a "burp" of air backwards through the turbo, though it never stops spinning the proper direction.

Look at your boost gauge when it happens, does the needle jump wildly back and forth, but stay steady the rest of the time?

When I added the turbo compressor upgrade, mine started doing it occasionally under full throttle. I turned my boost controller down to 35, and it pretty much went away. But, since I added the 3K GSK, it has been doing it a lot more.
I plan to work over the TPS and change to stiffer shift point spring to make WOT shifts happen at a higher rpm, I think that will help some.

 

thanks you guys for your help i was starting to get worried about the ole dodge

 

what is the compressor up grade? how much is it? what does it do? where can I get it?

 

[quote author=VinDiesel link=board=16;threadid=7171;start=0#68858 date=1037663901]<br>I think what you are hearing is commonly referred to as &quot;barking&quot; the turbo. Basically, it's when your turbo is suddenly supplying more air than the engine can take- such as when shifting, or letting up quickly on the throttle while accelerating hard. You get a &quot;burp&quot; of air backwards through the turbo, though it never stops spinning the proper direction.<br><br>Look at your boost gauge when it happens, does the needle jump wildly back and forth, but stay steady the rest of the time?<br><br>When I added the turbo compressor upgrade, mine started doing it occasionally under full throttle. I turned my boost controller down to 35, and it pretty much went away. But, since I added the 3K GSK, it has been doing it a lot more.<br>I plan to work over the TPS and change to stiffer shift point spring to make WOT shifts happen at a higher rpm, I think that will help some.<br>[/quote]<br><br>This is where you start talking about the performance maps of the turbochargers. It sounds like you are outside the performance area of the turbo on the compression ratio vs. mass flow curve. When you do that the turbo becomes way less efficient and you start surging the turbo.. Too much of that action can open your thrust bearing clearance on the turbo and eventually...BOOM... No boost.. <br><br>I would try to avoid &quot;barking&quot; or surging the turbo if at all possible. If you require more boost/flow, you may have to upgrade to a different series of turbo Ie.. HX40 or B1 etc.<br><br>J-eh

 

[quote author=Lil Dog link=board=16;threadid=7171;start=0#69458 date=1037737070]<br><br>I would try to avoid &quot;barking&quot; or surging the turbo if at all possible. If you require more boost/flow, you may have to upgrade to a different series of turbo Ie.. HX40 or B1 etc.<br><br>J-eh<br>[/quote]<br><br>I would definitely agree barking should be avoided as much as possible, hopefully a few of the adjustments I have in mind will cut down/eliminate the problem. I suppose the 12cm2 exhaust housing is compounding the problem- more restriction, but is also spinning the turbo harder than a 14 would.<br><br>Has anyone noticed an effect on turbo &quot;barking&quot; when installing different air filter setups? ???

 

[quote author=dodgeman01 link=board=16;threadid=7171;start=0#69187 date=1037716135]<br>what is the compressor up grade? how much is it? what does it do? where can I get it?<br>[/quote]<br><br>It's the compressor housing and pin wheel for a HX40. It will fit right on the HX35. Instead of an inlet opening approximately 2 3/16&quot; diameter, it has about 2 3/8&quot; dia. It will move more air, sooner, and with a higher peak boost = better throttle response, less smoke. My max boost before was about 35psi, after 42. But that's a little too high (excessive shaft speed) for a HX35, so I turned my adjustable controller down to 35.<br><br>Everything was cool until I put in the 3K GSK, and now get full fueling up to almost 3 grand. As I mentioned, I have a few more adjustments, but may have to turn down the controller a bit more.<br><br>The kit came with turbo mounting gaskets and seals, but I just made the swap on the truck. The cost was just under $200. I'll send you the details on my supplier, I don't think he'd mind if I posted his info, but I haven't asked him.

 

Thanks for the info I will have to check in to it.<br>Aaron

 

$200 for the HX40 upgrade?<br>Tell us more please!!<br>That is, if your &quot;Supplier&quot; doesnt mind.<br><br>Supplier?? We are talking about truck parts right?<br><br>Bombing=power=euphoric state of mind.<br>Same effect as drugs and as a plus it's legal.

 

[quote author=Stevie G link=board=16;threadid=7171;start=0#69854 date=1037802659]<br>$200 for the HX40 upgrade?<br>Tell us more please!!<br>That is, if your &quot;Supplier&quot; doesnt mind.<br><br>Supplier?? We are talking about truck parts right?<br><br>Bombing=power=euphoric state of mind.<br>Same effect as drugs and as a plus it's legal.<br>[/quote]<br><br>Yes, the compressor upgrade kit (housing, pinwheel, and seals, gaskets) only about $200.<br><br>You're right it might be the euphoria, or it could be that late night (early morning??) posting At 42 psi the unmodified HX35 would be spinning too fast, but the modified one is turning the same (or slightly less) speed than it did before, It's just moving more air. I may need to slow mine down a bit by turning down the boost controller, or going to a bigger exhaust housing- just to avoid the barking, not because it's spinning too fast.<br><br>Anyway,<br>I called my supplier and received permission to post their info:<br><br>RaeLyn Evans<br>Mountain West Turbo &amp; Supply<br>11124 South Alta Heights Drive<br>Sandy, UT 84094<br><br>801-557-4960<br>mountainwest@softcom.net<br>