Engine/Transmission (1998.5 - 2002) Are my new mods suppose to be this loud??

[RacinDuallie]

Yes I too think he's 'hearing' his new hardware.

There are 2 gaskets associated with the Intake Horn- one between the intake horn and heater grid and one between the heater grid and plenum cover plate.

Then there is one for the plenum cover plate to the head... ... ... .....
I agree with Greg on the soapy water spray method to check these gaskets.....

I didn't say that the manifold cracked when you swapped parts- it's just that they 'do' have a cracking problem and was giving you an idea to look and see if it coulda been the problem... .

But seriously- I think your hearing your new parts working for you,

By swapping back in the stock air filter box to listen was a good idea I didn't think of that one... ..... (nice call Greg!) Qwick 5 minute swap just to see anyhow...

And if you use the pressurizing method you should start to hear the air leaking @ 35psi or so- you don't need 100+ psi..... If your not hearing a leak at 50psi then chances are it's fine- your not boosting above 50psi anyhow

 

[mdepot]

If it doesn't turn out to be a leak, you might want to look into a TAG (turbo air guide). Never used one myself, but most of the TDR posts I've read about them seem to say they do help quiet things down. .



Here's a link: http://www.dieselpowerproducts.com/tag

 

[RacinDuallie]

:-laf :-laf I must be a T U R B O H E A D !!:-laf :-laf


Am I the only one who thinks that "turbo-noise" is SWEET MUSIC?:-laf Oo. !!









but it does drive my co-pilot nuts!! She'll close her eyes on long trips and know somethings up just by the pitch the turbos making-even if I gracefully get into it... ... . .

:-laf

 

[PC12Driver]

I believe the Schwitzer's have a very different sound than a Holset, and I agree that he's probably just hearing the new turbo. I asked a while back what the conditions were with the 1200 degrees @ 55mph. I know what the rpm would be, but was that cruising at 55 @ 1200* and no boost or was that full throttle at 30+ psi of boost, or somewhere in between? Clmsnow, have you posted what the peak boost is you're now seeing or have I missed it?



It seems like we're talking this poor guy into thinking he has a boost leak. He sees more smoke off idle when accelerating that does clear mostly up and has a louder whistle under higher boost conditions. Sounds like he's got a Comp, DDII's, and a bigger turbo to me...

 

[RacinDuallie]

It seems like we're talking this poor guy into thinking he has a boost leak.

No- correction- read post 37 here - I think he's thinking that on his own- he posted that he has a leak- but the more he described it and the more I came up with that conclusion on post 37... .....






At least now we told him valuable info for future use... ... ... ...

Keep that info in the toolbox on your shoulders Clmsnow!! :-laf

 

[Clmsnow]

Holy cow... you guys are great!! I'll double check everything that you guys mentioned.

PC12... the hig temps at 55mph were at about 10-18psi... I believe, I wasn't in it hard, probably just lugged her down.

Lsfarm. I think I still have all the rubber gaskets on the firewall, I'll check that too. I was thinking about putting the stock air box back on and listening to it.

RD. I'll check all the things you said as well. As for the gaskets on the Intake Horn... . I don't remember. The turbo came with a few new gaskets and I used them all accordingly. I am pretty sure there was one for the Intake Horn.

I'm off to work right now, I'll see if the changes I made last night helped, if not I'll be following everyone's advice tonight... ... . man, I am ready to thrash on this thing, but I'm not confident that she is ready yet

 

[PC12Driver]

No- correction- read post 37 here - I think he's thinking that on his own- he posted that he has a leak- but the more he described it and the more I came up with that conclusion on post 37... .....

I read post 37 and I was agreeing with you. But on post 39 you've got him chasing leaks again. All he needs is some time to get used to the new sounds and give it some pedal to see if there really is a problem.



He changed some major components and of course the truck is gonna sound and behave differently (as a matter of fact, almost exactly like he described). If there was a leak in the system he would have heard it with the old setup. The intercooler isn't just gonna spring a leak because he replaced a turbo (especially since he's been babying it for break-in). If there's a leak it would be in the fittings he had apart, most likely at the compressor outlet. If that's tight there should be no problem. The more everyone has him screwing with everything else the more of a chance that he'll get a leak.



Clmsnow: GET ON IT! It should be broken in by now. Keep an eye on the egt and boost. Start off easy on the Comp (like a level 2 or 3) and see what happens. That will get the turbo against the wastegate and we can see what your max boost #'s are (probably high 30's). Egts should stabilize between 1300-1400* (I'm guessing on the temps but that should be close). If everything checks out, put the tools away and enjoy the noise. If the temps swing up out of control (don't go much over 1400* for more than a couple of seconds) or your boost doesn't build, then it's time to either adjust the wastegate or check for leaks.



A boost leak in itself won't hurt your truck. The resulting high egts will. Keep an eye on the pyro and back off if the temps get out of hand.



Give it a run and get back to us with the info.



edit-> Watch the fuel pressures closely too 'till you get the pusher pump on. The Comp and injectors could out-suck what the pusher pump can supply.

 

[RacinDuallie]

I read post 37 and I was agreeing with you.

Oh! O. k. ! I was just going off what was posted back- he suspected an intercooler leak- I gave a procedure on checking it... ... no harm no foul!


He DID have a leak before he made the big component swap though... ... ... ... .

Didn't recall if he solved it before the swap though- didn't think he fully got rid of the noises before swap though so I was just replying back to what he posted... .....




Anyhow-
How many miles on the new set-up Clmsnow?

 

[Clmsnow]

Yes, I did have a leak before the turbo went on... but I did resolve it. This new sound is pretty similar. However, it does sound a little better this morning. When I go to lunch I'll put the box on 3x5 and get on it and see what the numbers look like and report back. Don't want to turn it much higher until the pusher pump goes on this weekend(hopefully).

 

[Clmsnow]

Just ran home for lunch. . re-set the gauges, set on 3x5. Boost-35. 9 EGT-1083 Fuel Pressure..... drops down to 4lbs for a second when it down shifts then runs about 6-8 at WOT(usually around 14-15 at idle). This was for a short run... from about 45mph up to 90mph and then let out of it; did it twice. Still hear that sound after about 8-10 psi of boost. Any thoughts??

 

[Fishin Guide]

Was this WOT?



What are the temps at cruise?



Dave

 

[RacinDuallie]

So far sounds good to me... .

 

[Clmsnow]

Yes, that was WOT, for only about 3 seconds or so. Cruise temps are 800-900, boost around 8-12.

 

[PC12Driver]

Lets see, 36psi, less than 1100* egt, and almost 400hp at WOT. Where's the problem?



Sounds like you've got a pretty rockin' combo.



Get the pump on and put the tools away!

 

[Clmsnow]

BUt, like I said, that was on level 3. After I put on the pump I'll try level 5. At what time do I need to worry about boost? I have my alarm set for 40. I believe HTT set the waste gate at 38... I think. How does the waste gate setting affect things? Any way to get this thing better on the bottom end? I have been reading about the Catcher.

 

[PC12Driver]

My headgasket popped at 40psi, but I think I'm on the low end of the scale. Even so, I'd say you're getting close to the realm of needing some sort of help to keep the head on (starting with studs).



If your temps are in check, don't worry about the wastegate. You really don't want to run any more boost than you need, since that just adds additional strain on the components. You won't gain any more power, but your egt's may drop a bit (and you're already very safe). The wastegate only opens when the set boost psi is reached, so it doesn't have anything to do with bottom end spoolup (if that's what you're asking).



The Catcher will spool things up more quickly, but at the cost of more smoke (not saying that's a bad thing). And again, that will only help while heavily accelerating. You won't get any better spool under light throttle acceleration or cruising.



Did you get the 12cm or 14cm housing?

 

[RacinDuallie]

Put that pusher pump on first- and give us the report here on this thread- Before you order that Catcher... ... ... ... .

 

[Clmsnow]

Ran the truck again on 3x5... hit 1135* EGT and 37psi Boost. Brought the Fuel pressure down to 2-3lbs before it shifted. Is it just getting warmed up or what?? Pusher pump will go on this weekend and I'll report back.

 

[RacinDuallie]

Everything is sounding good so far Clmsnow- get that pusher pump on though!! It needs it!!

 

[KWheaton]

Clmsnow,



I have the AFE with a stock turbo, huge turbo whine (over stock air housing), some like it, some don't! Most of us diesel heads can't get enough of it! I even open up just the passenger side windows to listen to the darn thing, and my exhaust of course! Have fun with your new setup!



One more thing, what kind of boost pressures were you seeing with your stock turbo? What made you want to switch turbos? I currently see 34-37 psi with my stock turbo and wouldn't switch my setup for fear of more lag and higher EGT's.



Kevin