Do you really see a differance with a larger turbo? With my stock turbo, the boost climbs really quick to 40+lbs. with the comp box set to 5 sublevel 1. I get smoke and the ECT's go to 1500 before I back off the petal. Does it take much longer for the turbo to spool up?(I like things to happen quickly) Is it really worth the extra DOE to install a HX-40?
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To HX40 or not to HX40 that is the question.
- Thread starter Devildog
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If you look at the boost map for the 40 compared to the 35 you will see that the 40 delivers much more CFM at the same boost level. If you can get the 40 to produce the same PSI of boost at the same RPM as the 35 then the engine and EGT will run cooler. On the other hand, the 40 does not have to produce as much boost at the same RPM to keep the same level of performance.
It is obvious from this forum that a lot of people love their 40 and some have had bad luck with it. Some say the lag is more. Some say it is almost identical. Do a search and read for days. When it all comes down to it, your dedication is the factor. Do you want to completely push the limit and see how far your engine can go or are you happy with the current setup. If all you are concerned with is reducing you EGT, watch your gauge and back out of it, don't step on the peddle so hard, and learn to drive your truck the "correct" (relative) way. If you want more power the 40 seens to be a crutial part of the process
It is obvious from this forum that a lot of people love their 40 and some have had bad luck with it. Some say the lag is more. Some say it is almost identical. Do a search and read for days. When it all comes down to it, your dedication is the factor. Do you want to completely push the limit and see how far your engine can go or are you happy with the current setup. If all you are concerned with is reducing you EGT, watch your gauge and back out of it, don't step on the peddle so hard, and learn to drive your truck the "correct" (relative) way. If you want more power the 40 seens to be a crutial part of the process
HEMI®Dart
TDR MEMBER
Devildog,
I noticed a huge torque & Horsepower increase with an HX-40. They've been dynoed and show a solid 25hp increase. But it feels more like 50 hp. Mid range & top end is "explosive". I lost a little low end torque, but no much. What little you lose, you'll get back 10 fold at mid to upper rpm's. "Mopar-muscle" said with the HX-40, it seemed like he had another "Setting" on his Comp E-Z box.
It appears by reading the threads, a 12 valve, 5 speed truck, responds well to the HX-40. An auto 24 valve truck, not as good. More low end lag.
My Majestic prepped HX-40 spun the main shaft bearings with only 90 miles.
I was going to get another, but the Twin-Turbo kit should be available any day now. This should give you the quick spoolup or the stock turbo, yet breath like an HX-40 or better. Its supposed to be reasonably priced, won't need to relocate the right side battery. In testing it was said, it's tough to get the EGT's over 1300º w/ a heavily fueled ltruck. You'll have 65 lbs of boost available if you want it.
I'd wait and see how the TT kit looks.
Twin Turbo's
I noticed a huge torque & Horsepower increase with an HX-40. They've been dynoed and show a solid 25hp increase. But it feels more like 50 hp. Mid range & top end is "explosive". I lost a little low end torque, but no much. What little you lose, you'll get back 10 fold at mid to upper rpm's. "Mopar-muscle" said with the HX-40, it seemed like he had another "Setting" on his Comp E-Z box.
It appears by reading the threads, a 12 valve, 5 speed truck, responds well to the HX-40. An auto 24 valve truck, not as good. More low end lag.
My Majestic prepped HX-40 spun the main shaft bearings with only 90 miles.
I was going to get another, but the Twin-Turbo kit should be available any day now. This should give you the quick spoolup or the stock turbo, yet breath like an HX-40 or better. Its supposed to be reasonably priced, won't need to relocate the right side battery. In testing it was said, it's tough to get the EGT's over 1300º w/ a heavily fueled ltruck. You'll have 65 lbs of boost available if you want it.
I'd wait and see how the TT kit looks.
Twin Turbo's
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I see that Dave Mitchell has twins for sale at his site:
http://www.enterpriseengine.com/orderRamStuff.htm
I sure would like to try those babies out. I think I'll go for twins rather than take a chance on the HX-40.
Do twins still bark if you let off suddenly?
http://www.enterpriseengine.com/orderRamStuff.htm
I sure would like to try those babies out. I think I'll go for twins rather than take a chance on the HX-40.
Do twins still bark if you let off suddenly?
I received an e-mail from Piers Thursday. The twins are close, real close! He said I could get them now as a matter of fact!!!!
Thats the reason for the question I posted a few hours ago about the "storm" block.
There is a very small charge to modify the oil pan if you dont have a "storm" block. Im not sure which I have.
Piers said he has not been able to blow the twins up yet. Unlike many HX-40 turbo's have.
I do know the primary turbo is his super turbo (modified HX-35) the secondary I do not know but it has a 5" exducer if that gives any clues. Prolly a HX-55! Guessing of course.
The kit is complete from air cleaner to 5" downpipe. It sounds all good to me.
Im going to try and swing it real soon. I just squirted 5th gear again and its Southbend clutch time. I would love to do it all at once,, if the dollars are there after this next big job.
Whats the defining charactoe of a "storm"block?
Don~
The guy with a 4" system in his truck can reduce the 5" downpipe to the 4" without any trouble. Remember the 4" pipe will flow a ton of air.
You dont have to install 5" all the way back.
Thats the reason for the question I posted a few hours ago about the "storm" block.
There is a very small charge to modify the oil pan if you dont have a "storm" block. Im not sure which I have.
Piers said he has not been able to blow the twins up yet. Unlike many HX-40 turbo's have.
I do know the primary turbo is his super turbo (modified HX-35) the secondary I do not know but it has a 5" exducer if that gives any clues. Prolly a HX-55! Guessing of course.
The kit is complete from air cleaner to 5" downpipe. It sounds all good to me.
Im going to try and swing it real soon. I just squirted 5th gear again and its Southbend clutch time. I would love to do it all at once,, if the dollars are there after this next big job.
Whats the defining charactoe of a "storm"block?
Don~
The guy with a 4" system in his truck can reduce the 5" downpipe to the 4" without any trouble. Remember the 4" pipe will flow a ton of air.
You dont have to install 5" all the way back.
Here's what I've found with the HX40-16:
- There is more lag than the HX35. Noticeable? Yes. A problem? Absolutely not.
- When boost comes on, the needle almost can't keep up with it. I couldn't believe it. Fast isn't the word for it.
- Solo mileage is at least 1. 5mpg better. I haven't checked towing.
- EGT is lower. Where I could get 1500 degrees & had to let off before, couldn't get same fueling over 1200.
- Smoke is reduced. That's a 'who cares' for me, but the chrome tip keeps cleaner.
- Gives you room for more fuel to where you worry about breaking something.
- There is more lag than the HX35. Noticeable? Yes. A problem? Absolutely not.
- When boost comes on, the needle almost can't keep up with it. I couldn't believe it. Fast isn't the word for it.
- Solo mileage is at least 1. 5mpg better. I haven't checked towing.
- EGT is lower. Where I could get 1500 degrees & had to let off before, couldn't get same fueling over 1200.
- Smoke is reduced. That's a 'who cares' for me, but the chrome tip keeps cleaner.
- Gives you room for more fuel to where you worry about breaking something.
yes , the 40 is awesome , but ...
the lag with a 24V auto is considerable , especially with a DTT 93% TC , but i didn't seem to mind it that much . what i did mind was the noise , no groove to retain a silencer ring , though it would be hard to add it , but it sounded like i had a jet turbine under / on the hood , man was it loud
and my hearing these days ain't so good , i can imagine the look on the wifes face first time she gets on the loud peddle .
anywho , i need to do something for EGT , what i'm not sure . twins would be nice i suppose , but not sure i can swing that kind o coin , speaking of hows 'bout you mailing me that teaser also ??
the lag with a 24V auto is considerable , especially with a DTT 93% TC , but i didn't seem to mind it that much . what i did mind was the noise , no groove to retain a silencer ring , though it would be hard to add it , but it sounded like i had a jet turbine under / on the hood , man was it loud
and my hearing these days ain't so good , i can imagine the look on the wifes face first time she gets on the loud peddle . anywho , i need to do something for EGT , what i'm not sure . twins would be nice i suppose , but not sure i can swing that kind o coin , speaking of hows 'bout you mailing me that teaser also ??
Not ALL of them grenade
I have been running my BD Power HX40 since late Jan. 2001, so far so good. I see 40 psi's on a daily basis and can easily hit 45 psi's with the TST box on setting 6. Lag... . yep, there is some lag, but that disappears after about 2 seconds of throttle, then look out as the boost throws you back in the seat. If mine went South, I'd replace same with another in a heartbeat.
The twins do look sweet, but at what price ? Is the HX40 used as one of the turbos, or is it a HX35/HX55 combo ?
Another point... I don't abuse my HX40 in my mind. No stomp shifting, etc. I roll the power on smoothly and release the throttle in the same way, I believe the turbo shaft is much happier that way.
I don't know if it matters, but I followed Mike's advice at A. W. D. when I had the turbo installed. His advice was to build the boost slowly, adding a bit more with each pass, kinda like curing the turbo like you cure a woodstove. Seemed to work for me.
Scott W.
I have been running my BD Power HX40 since late Jan. 2001, so far so good. I see 40 psi's on a daily basis and can easily hit 45 psi's with the TST box on setting 6. Lag... . yep, there is some lag, but that disappears after about 2 seconds of throttle, then look out as the boost throws you back in the seat. If mine went South, I'd replace same with another in a heartbeat.
The twins do look sweet, but at what price ? Is the HX40 used as one of the turbos, or is it a HX35/HX55 combo ?
Another point... I don't abuse my HX40 in my mind. No stomp shifting, etc. I roll the power on smoothly and release the throttle in the same way, I believe the turbo shaft is much happier that way.
I don't know if it matters, but I followed Mike's advice at A. W. D. when I had the turbo installed. His advice was to build the boost slowly, adding a bit more with each pass, kinda like curing the turbo like you cure a woodstove. Seemed to work for me.
Scott W.
HEMI®Dart
TDR MEMBER
Forrest,
Thaks for reminding me about 2 things with the HX-40.
1) The boost gauge will go from 10 psi to 45 psi in an instant. Once the 40 starts spooling up, it pumps some air.
2) I drove like there was an egg between my foot and the go pedal for a week after I installed the HX-40. My fuel gauge only dropped a needle's width in a week. I couldn't believe the mileage increase the 40 gave. Must have been at least a 2 mpg increase!
Big Saint & Mopar-Muscle:
Piers's Twin Turbo's are almost ready to go. I'll shoot you guys an instant message on the price & details. No need to reply back.
Thaks for reminding me about 2 things with the HX-40.
1) The boost gauge will go from 10 psi to 45 psi in an instant. Once the 40 starts spooling up, it pumps some air.
2) I drove like there was an egg between my foot and the go pedal for a week after I installed the HX-40. My fuel gauge only dropped a needle's width in a week. I couldn't believe the mileage increase the 40 gave. Must have been at least a 2 mpg increase!
Big Saint & Mopar-Muscle:
Piers's Twin Turbo's are almost ready to go. I'll shoot you guys an instant message on the price & details. No need to reply back.
Used HX-40 for sale???
Hey guys, I've got an HX-40 that's been on my truck (see sig below for details) since about April (about 12,000 miles), has seen 42psi even though the wastegate is set to about 38-39psi. It was one of DD's that had the wastegate tack-welded shut, but I ground the weld off and added the wategate actuator. Anyone interested in buying it (with one of the DD 4" downpipes that exited slightly to the side - I cut it short and used 4" flexpipe to attach it to 4" exhaust)??? Send me an e-mail if so.
I'm with John on this one, too much lag on a 24V auto with the DTT stuff. Makes my set-up smoke too much off the line (I personally don't like smoke at all). It does kick a$$ once it's spooled up a little! I'll miss that, but I am willing to give it up for the bottom end and less smoke.
Hey guys, I've got an HX-40 that's been on my truck (see sig below for details) since about April (about 12,000 miles), has seen 42psi even though the wastegate is set to about 38-39psi. It was one of DD's that had the wastegate tack-welded shut, but I ground the weld off and added the wategate actuator. Anyone interested in buying it (with one of the DD 4" downpipes that exited slightly to the side - I cut it short and used 4" flexpipe to attach it to 4" exhaust)??? Send me an e-mail if so.
I'm with John on this one, too much lag on a 24V auto with the DTT stuff. Makes my set-up smoke too much off the line (I personally don't like smoke at all). It does kick a$$ once it's spooled up a little! I'll miss that, but I am willing to give it up for the bottom end and less smoke.
Hemi,
My 1st mileage test was all highway on the way back to Reno from Canada, where SOTN & the gang put on the HX40, valve springs & gov spring kit. After I got back to Reno, I did the commute cycle, same speed, same acceleration & went from the 17's to over 19 consistently. I'd have to give that a big
I drive between 4500' & 5100' in elevation. I could get 42psi, but adjusted the wastegate to 40 max. It'll be interesting to get to sea level & see if it maintains 40.
I towed with the 4. 8 plate for the 1st time this weekend. For the 12 valvers, it's not rated & definately not recommeded for 5 speeds. I'd assume it's 50hp+ more than the #10, which is 330hp. This one is slid 3/4 forward, probably worth another 40hp or so. I always try to tow around 20psi max. At 20psi, the big blocks don't stand a chance. But I had a case where I was following a solo Ford diesel up a hill & when the passing lane came up, he passed the slower car & could not out run me. I didn't have to go over 35psi to do it & EGT was not in the danger area. He watched me with the 5'er in his rear view mirror more than he was watching the road.
My 1st mileage test was all highway on the way back to Reno from Canada, where SOTN & the gang put on the HX40, valve springs & gov spring kit. After I got back to Reno, I did the commute cycle, same speed, same acceleration & went from the 17's to over 19 consistently. I'd have to give that a big
I drive between 4500' & 5100' in elevation. I could get 42psi, but adjusted the wastegate to 40 max. It'll be interesting to get to sea level & see if it maintains 40.
I towed with the 4. 8 plate for the 1st time this weekend. For the 12 valvers, it's not rated & definately not recommeded for 5 speeds. I'd assume it's 50hp+ more than the #10, which is 330hp. This one is slid 3/4 forward, probably worth another 40hp or so. I always try to tow around 20psi max. At 20psi, the big blocks don't stand a chance.
But I had a case where I was following a solo Ford diesel up a hill & when the passing lane came up, he passed the slower car & could not out run me. I didn't have to go over 35psi to do it & EGT was not in the danger area. He watched me with the 5'er in his rear view mirror more than he was watching the road. 
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Issue 128 – Digital Version
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Renew
Subscribe
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Back Issues
Subscription Status
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What Makes Us Tick?
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