Possibly Low Boost KC300X
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Cross-Country
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Possibly Low Boost KC300X
Okay now that my hutch mod is going the right direction I have some general performance questions.
2000 Excursion 7.3 290k 4x4 on 35’s
It has a KC300x 63/73 Red line deleted
Riff raff boots and plenum reinforcement
OEM IPR, ICP and pigtail 30k ago
HPx crossover
CNC fab HPOP lines
6 Position Chip supposedly tuned by gearhead
Gauges wise I have,
Isspro: Boost, Fuel pressure, EGT & trans temp. I also have a scan gauge for ICP and IPR.
I will be able to do data logging later this week when I get some new batteries for my tablet that runs autoenginuity
I don’t think I make enough boost / have enough power. I have never seen boost higher than 26 PSI with this turbo. Here are some numbers, from WOT runs this morning.
Heavy tow, 55-85 mph
IPR 66%
ICP 1900
Boost 25
900 EGT
140 race
55-85
IPR 85%
ICP 1700
Boost 25
EGT 1000
Is my HPOP weak?
I have tested for boost leaks with a homemade pressure tester and I have not found any. I have looked for exhaust leaks both by visually checking for soot and by opening the hood and standing on the go pedal and watching for smoke.
2000 Excursion 7.3 290k 4x4 on 35’s
It has a KC300x 63/73 Red line deleted
Riff raff boots and plenum reinforcement
OEM IPR, ICP and pigtail 30k ago
HPx crossover
CNC fab HPOP lines
6 Position Chip supposedly tuned by gearhead
Gauges wise I have,
Isspro: Boost, Fuel pressure, EGT & trans temp. I also have a scan gauge for ICP and IPR.
I will be able to do data logging later this week when I get some new batteries for my tablet that runs autoenginuity
I don’t think I make enough boost / have enough power. I have never seen boost higher than 26 PSI with this turbo. Here are some numbers, from WOT runs this morning.
Heavy tow, 55-85 mph
IPR 66%
ICP 1900
Boost 25
900 EGT
140 race
55-85
IPR 85%
ICP 1700
Boost 25
EGT 1000
Is my HPOP weak?
I have tested for boost leaks with a homemade pressure tester and I have not found any. I have looked for exhaust leaks both by visually checking for soot and by opening the hood and standing on the go pedal and watching for smoke.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,348
Likes: 5,941
From: Lake Hartwell, GA
Some good information on HPOP's and choices of them in the link below.
So What's the Current Recommended Reman HPOP?
So What's the Current Recommended Reman HPOP?
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Cross-Country
Joined: Aug 2018
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FTE Leadership Emeritus
Joined: May 2014
Posts: 27,348
Likes: 5,941
From: Lake Hartwell, GA
Your welcome. Having too much information is almost always better than not having it. Even if some of the information is opinion orientated or personal experience based.
To each their own, but now you have a good background of your choices and what the choices off you in the way of a HPOP. I am 99% certain I know my HPOP choice when the time comes, but I also changed my mind about going with 160/0 and decided to stick with 140/0 AD's when my injectors start to give up.
Good luck to you and please come back and tell us what you decided and the outcome.
To each their own, but now you have a good background of your choices and what the choices off you in the way of a HPOP. I am 99% certain I know my HPOP choice when the time comes, but I also changed my mind about going with 160/0 and decided to stick with 140/0 AD's when my injectors start to give up.
Good luck to you and please come back and tell us what you decided and the outcome.
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Cross-Country
Joined: Aug 2018
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You are right on the information for sure. Honestly I was leaning towards a T500 but now I might just get a Bosch. Longevity and reliability are key for this truck. I would love to have it pull like a 6.7 but I also need it to not leave me stranded again.
If you don’t mind sharing what are you planning on when you replace an HPOP?
If you don’t mind sharing what are you planning on when you replace an HPOP?
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Cross-Country
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Very true. I’m not gonna lie for a 21 year old vehicle it does really well even with a weak hpop.
What I should have said was while I would like it to tow like a 6.7 I know that’s not a reasonable expectation.
What I should have said was while I would like it to tow like a 6.7 I know that’s not a reasonable expectation.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,348
Likes: 5,941
From: Lake Hartwell, GA
You are right on the information for sure. Honestly I was leaning towards a T500 but now I might just get a Bosch. Longevity and reliability are key for this truck. I would love to have it pull like a 6.7 but I also need it to not leave me stranded again.
If you don’t mind sharing what are you planning on when you replace an HPOP?
If you don’t mind sharing what are you planning on when you replace an HPOP?
Reliability, longevity and efficiency are how I have built my truck over the past 8 years I have owned it. We have driven it coast to coast more than once and travel long distances with it a lot. Each time we travel, the 5th wheel trailer is attached.
We just finished a 5,500 mile trip towing the 5th wheel earlier this month. I averaged 12.3 MPG's (towing) and decided that because my 260,000 mile OEM injectors provide me (my application) more than enough power with my setup, I will be going with AD injectors again.
Even towing up a 7% grade to 9,000' ASL...
Sure more power is nice, but at what cost down the line? Does 50 additional HP mean much to me when I already have plenty? Nope...
Just my opinion and what I have come to decide as a course if action based in my goals, attaining those goals and wishing to maintain that level of reliability, longevity and efficiency for years to come.
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A couple of updates,
1. I replaced the HPOP prior to our big trip. I went with a T500 after speaking with terminator and so far I love it.
2. On my trip I had this happen:
I had an interesting experience today, driving up Hoosier pass from Breckinridge CO to Alma. I had a low fuel pressure issue it was coupled with a lack of power and more smoke than normal. So I pulled over, got under the truck and noticed the inline filter was dirty. No big deal, I swapped it out and my fuel PSI was back up at 72 psi. The incline is about a 6-7% and around 9500 FT I am towing a 9200 lb trailer. When I put the truck in gear it would not move. It blew a lot of black smoke and refused to go.
ICP was about 2000
IPR 32%
Boost 5 PSI
Fuel 72 PSI
I was finally able to get it moving by putting it in 4 LO and luckily I was close to the top of the pass so I could get there and then shift back to 2 HI. It behaved pretty normal after that but still a little low on power starting out, it’s like driving out of a hole until the boost builds. Any ideas?
1. I replaced the HPOP prior to our big trip. I went with a T500 after speaking with terminator and so far I love it.
2. On my trip I had this happen:
I had an interesting experience today, driving up Hoosier pass from Breckinridge CO to Alma. I had a low fuel pressure issue it was coupled with a lack of power and more smoke than normal. So I pulled over, got under the truck and noticed the inline filter was dirty. No big deal, I swapped it out and my fuel PSI was back up at 72 psi. The incline is about a 6-7% and around 9500 FT I am towing a 9200 lb trailer. When I put the truck in gear it would not move. It blew a lot of black smoke and refused to go.
ICP was about 2000
IPR 32%
Boost 5 PSI
Fuel 72 PSI
I was finally able to get it moving by putting it in 4 LO and luckily I was close to the top of the pass so I could get there and then shift back to 2 HI. It behaved pretty normal after that but still a little low on power starting out, it’s like driving out of a hole until the boost builds. Any ideas?
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Cross-Country
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I’m pretty good about letting it idle after working it hard but it’s possible I didn’t wait long enough.
Its got a pretty new AIS setup but the filter minder is at less than half so I don’t think it’s a clogged air intake.
We head home tomorrow so when I get home I’m going to dig into the boost leak pretty hard. It’s worse when it’s hot, today in CO springs I ended up in a sloped parking spot. When I tried to back up and reposition it acted the same way. Without the trailer I was able to get it to move without 4 lo. When we came back out and it was dead cold I was able to back out with no problem. So that makes me think it could be a boost leak that’s worse when it’s hot and everything is expanded.
It’s also time to throw those bellowed up pipes on now that the weather is getting cooler. This sucker is too tall for the garage so I have to work in the driveway and the Texas summer heat sucks for longer projects like that.
Its got a pretty new AIS setup but the filter minder is at less than half so I don’t think it’s a clogged air intake.
We head home tomorrow so when I get home I’m going to dig into the boost leak pretty hard. It’s worse when it’s hot, today in CO springs I ended up in a sloped parking spot. When I tried to back up and reposition it acted the same way. Without the trailer I was able to get it to move without 4 lo. When we came back out and it was dead cold I was able to back out with no problem. So that makes me think it could be a boost leak that’s worse when it’s hot and everything is expanded.
It’s also time to throw those bellowed up pipes on now that the weather is getting cooler. This sucker is too tall for the garage so I have to work in the driveway and the Texas summer heat sucks for longer projects like that.