34lbs Boost too high for towing?

[swivel]

I am getting ready to pull the trigger on a bigger trailer and have seen some concerns on the board about boost pressure numbers. My truck will spin up to 34lbs of boost even empty without pushing it hard and I'm worried about sending the turbine through the intercooler. I have an SO w/48RE running an EZ(level3) with the boost elbow. Without the elbow, EGT's get up too high. My question is what number is more of an issue? EGT's up to 1300 on long hills or boost touching 35lbs+?



I read that a couple shops are reccomending leaving Edge elbow off. Does that mean they are reccomending EGT's be run high instead?

 

[willyslover]

your asking a lot out of that lil HY turbo IMHO



you can tow with the Ez but watch the egt's. . remember that the reading will be an average or the 6 cyls. , and that # 6 doesn't get the air that the others get and actually runs much hotter . . suggest that a 1250 # pre turbo is a much safer # to run. . sure others run 1300 + all the time. . well there have been several #6 melt downs towing also. . do a search on member Cliffman and he runs a larger turbo than your HY [assuming you still have the stock turbo]

 

[y-knot]

You don't have to worry about spinning the turbine thru anything, thats not the problem. What is the problem is your truck is already petered out with out the additional load of a trailer. This will lead to very high EGT's , you are probably seeing them now. I would plan on switching to a new turbo or at least switching to a larger housing. This would free up the exhaust side and allow better flow, which will reduce EGT's . I had roughly the same scenario with mine, I went to the 16cmsq housing and it really helped, their will be a huge change when the load is low, boost wise. I lost around 5-7 psi when running open road, and 100 EGT. The big benefit comes when loads are high, as in towing, there it helped reduce EGT's while producing more power.

 

[swivel]

Thanks for the replies -



EGT's seem OK now with this setup (pulling about 7000lbs - will be about 10,000lbs) I run about 60mph up the hills in third at 1200 with the trailer- but boost is up there. (BTW -this is Phx to Flagstaff run)



I think I've seen 3 posts on turbo's going south on this board - all with boxes but I think an EZ on 3 is about as tame as you can go. Not really sure why my SO is running such high boost - just concerned that I'm at the limmit. I can lower the boost be removing the elbow but high EGT's will make the trip slower

 

[Tomeygun]

Thanks for the replies -



EGT's seem OK now with this setup (pulling about 7000lbs - will be about 10,000lbs) I run about 60mph up the hills in third at 1200 with the trailer- but boost is up there. (BTW -this is Phx to Flagstaff run)



I think I've seen 3 posts on turbo's going south on this board - all with boxes but I think an EZ on 3 is about as tame as you can go. Not really sure why my SO is running such high boost - just concerned that I'm at the limmit. I can lower the boost be removing the elbow but high EGT's will make the trip slower

Have you ever looked at that elbow?!?!



It allows so LITTLE air to the wastgate, that with enough fuel (TST), can could push 50+ easy!!



i think that elbow makes 35 lbs only because that ez con not push any more fuel



JMHO



I think if you drill out the elbow, EVER-SO-SLIGHTLY, you could pull down the boost to 30 or so, very much trail and error though

 

[hasselbach]

Boy, I'm seeing the opposite. . Doing the beta testing for Attitude Edge box on my 04. 5. We ran the truck last night on 4 back-to-back runs. Stock it was 32 psi, and egt's in the 1000 range. Level 4 brought up the egts to only 1150 and 37 psi (3% back down recorded). The attitude does not have this boost elbow. Keeping the boost at 32 psi required a 100% backdown. No matter how hard we tried, we could never get the egts over 1150, even in level 5.



do the 04. 5's have a different turbo?

 

[Tomeygun]

Boy, I'm seeing the opposite. . Doing the beta testing for Attitude Edge box on my 04. 5. We ran the truck last night on 4 back-to-back runs. Stock it was 32 psi, and egt's in the 1000 range. Level 4 brought up the egts to only 1150 and 37 psi (3% back down recorded). The attitude does not have this boost elbow. Keeping the boost at 32 psi required a 100% backdown. No matter how hard we tried, we could never get the egts over 1150, even in level 5.



do the 04. 5's have a different turbo?

No, but a different wastegate config. , the 4. 5 600's have an electronic wastegate, so maybe the EDge box controling it, OR the fuel is being backed off until the boost lowers and make the box happy again ????



(EDIT), let me correct, the turbo is different is a slightly way i believe, like a slightly larger esh. houseing, other than that i know of no other differences

 

[GWoody]

No, but a different wastegate config. , the 4. 5 600's have an electronic wastegate, so maybe the EDge box controling it, OR the fuel is being backed off until the boost lowers and make the box happy again ????

This is from another thread on here concerning turbo's, I thought they were different too.













Today, 08:14 PM #35

hasselbach

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My 600 gets to 32-33 psi stock, and have seen as high as 37-38 during the Edge Attitude beta testing. . I hope this turbo is different than the 555 models. .

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Today, 08:59 PM #36

DLeno

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Its different. bigger compressor



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[CLAYTON]

No matter how hard we tried, we could never get the egts over 1150, even in level 5.



do the 04. 5's have a different turbo?

What temp do you have your back down feature set on? I'm guessing 1150* If you raise it then you'll hit what ever temps you set it at all the way up to 1500* and then starting seeing the back down feature working unless you turn that feature off.

 

[bpenrod]

I run at 32# boost pretty regular, I thought 40 is where the head gasket started to get iffy. If I turn up the duration to 100% on the VA box the wastegate cannot open quick enough and the boost really shoots up, I usually take my foot out when it hits 40#'s.

 

[hasselbach]

What temp do you have your back down feature set on? I'm guessing 1150* If you raise it then you'll hit what ever temps you set it at all the way up to 1500* and then starting seeing the back down feature working unless you turn that feature off.

Nope, EGT max was set at 1400. The only time it went into back down is when we limited the turbo boost to less than 35 psi.



I still only got 1150 max when the turbo limit was set at 40 psi (and got actual 37 psi doing so) and no back down at all.



I think Edge may want to add more fuel if this is the case. . This is a very cold program (which is good or bad, however you look at it).

 

[Tomeygun]

I run at 32# boost pretty regular, I thought 40 is where the head gasket started to get iffy. If I turn up the duration to 100% on the VA box the wastegate cannot open quick enough and the boost really shoots up, I usually take my foot out when it hits 40#'s.

I am having the same problem with my TST box, the boost comes on SOOOO quickly that the wastgate seems too slow to open, and then the boost goes to 35 and drops to 28-ish



wierd huh?

 

[CLAYTON]

Nope, EGT max was set at 1400. The only time it went into back down is when we limited the turbo boost to less than 35 psi.



I still only got 1150 max when the turbo limit was set at 40 psi (and got actual 37 psi doing so) and no back down at all.



I think Edge may want to add more fuel if this is the case. . This is a very cold program (which is good or bad, however you look at it).

When it was set at 40 psi and 1400* you didn't have any back down and it stayed at 1150* on level 5?

 

[hasselbach]

When it was set at 40 psi and 1400* you didn't have any back down and it stayed at 1150* on level 5?

3% back down max. makes me think they need to add more fuel in the upper rpm ranges in the program. I was really surprised to see the low egt's and low backdown figures. this happened three times (separate runs), so it wasn't a fluke. My duramax goes well above 1400 in level 5, but it is also pulling pretty hard then too. I'm thinking of installing the snow industries kit in the chevy, but at this point don't see a need in the dodge (yet)

 

[RankRam]

CLAYTON I'm sorry to step in on your conversation but how is your 48RE doing with this Beta testing?



I know, I know I have asked several times. I just like knowing if the 48 is doing well or needing a little help with the power you are putting to it.



Thanks!