i turned up the pump this past weekend. first i bottomed the full fuel screw out and drove it. buried the 35 psi boost gage brought the needle straight down. the only problem was that it wouldn't idle back down it would stay reved up until i let the clutch out. so i backed the screw off a 1/2 turn and i still hit at least 40 psi. would injector help out much more or have i pretty much reached my limit for power with the ve pump?
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42 psi
- Thread starter smokein cummins
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when it ve goes put in a 7100
for long life
for long life
One issue is the travel of the pumps fuel lever.
Another is the internal gov linkage.
Further still is the throttle linkage.
How about the gov spring?
Like I stated above, you have a long road ahead.
You may want to think about cyl head upgrades if you go this route. She's gonna get pretty darn hot.
Parting remarks... ... Running short on power is not our problem
It's the EGT. The problem we face is this; the VE will supply you'r every need, it's how much money we are willing to invest into other mods required to utilize the fueling rate, ie cylinder head/exhaust/turbo etc. etc. :{
Scott
Another is the internal gov linkage.
Further still is the throttle linkage.
How about the gov spring?
Like I stated above, you have a long road ahead.
You may want to think about cyl head upgrades if you go this route. She's gonna get pretty darn hot.
Parting remarks... ... Running short on power is not our problem
It's the EGT. The problem we face is this; the VE will supply you'r every need, it's how much money we are willing to invest into other mods required to utilize the fueling rate, ie cylinder head/exhaust/turbo etc. etc. :{ Scott
You have not reached your power limit... injectors WILL help... they will allow you to back off a little on the fuel screw and stay where you are ... this will put a little less stress on the pump.
Back off on the screw... yea right.
Be advised that since you have a non-intercooled engine the amount of power gained by the injectors will be a little less... since you already have larger stock injectors your about 25 hp ahead on that end.
Greenleaf's right... you will likely have EGT issues soon... you DO have a pyrometer, don't you?... . might be time to consider a turbocharger upgrade, exhaust upgrade, air filter upgrade...
Hey how come the list never gets shorter??
BOMB on.
Jay
Back off on the screw... yea right.
Be advised that since you have a non-intercooled engine the amount of power gained by the injectors will be a little less... since you already have larger stock injectors your about 25 hp ahead on that end.
Greenleaf's right... you will likely have EGT issues soon... you DO have a pyrometer, don't you?... . might be time to consider a turbocharger upgrade, exhaust upgrade, air filter upgrade...
Hey how come the list never gets shorter??
BOMB on.
Jay
If you're breaking 42 psi with stock injectors, you probably have very little more you can go by just playing with the pump. Some others have already mentioned great stuff, but I haven't seen pump timing advance mentioned yet. If you bump the timing up a little your boost will drop slightly, but you should notice a bit more power and throttle response. The biggest thing you should notice from advancing the timing is lower EGTs.
Also, over about 30 psi the stock turbo is out of its efficiency map--basically that means it's just too much boost for that turbo.
Mike
Also, over about 30 psi the stock turbo is out of its efficiency map--basically that means it's just too much boost for that turbo.
Mike
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I second that, cause I just advanced my pump maybe a little less 1/16" and I'm about to go back to stock '1. 40mm' lift. Boost is down some, cant hit redline egt's and SOP dyno is poor. Not as much smoke either. Low end is poor. Whats the deal DP, ECJ? Should I give it more fuel? Not happy where its at now, plus dont care for the 24valve engine sound. Not like a pinging knock as in too much advance but it did make the idle up about 25R's and a little louder... Bill
bgilbert-
If you're losing bottom end, you need to back off the timing a bit. On my pickup, the 1/8" rule (along with everyo other "rule") gets tossed out the tailpipe. More like 1/16" to go from 1. 4 to 1. 7mm. I now have it in the neighborhood of 1. 6mm, and it does ok, though I leave a grey haze all over when I get into it for more than 15psi boost. I may have other issues, though, i. e. tired pump cam ring.
smokein cummins-
You are WAAYYY out of your turbo's efficiency map. As in, putting some HOT air into the intake. I'd say get a PDR HX35-16 (The good pastor now tells me they can mod your H1C the same way, allowing you to keep the stock intake hose and crossover), or maybe a 35/40 hybrid, and AN INTERCOOLER. THat will help your EGTs more than anything. You DO have the pyro in the manifold, dont you? If not, deduct 20hp, and ask the pastor for what penence you need to do.
With stock in injectors, you are stressing your pump more than I would, but I have little room to talk- I can hit 38 psi, but also have EDMs, which are a different ball of wax. BUT, keep in mind, that you only stress your pump when you use the power.
ECJay-
I wouldnt say that we start with 25hp over stock IC, as our hotter intake air deducts a goodly percentage from our power output. (do you REALLY think my 38psi converts to 10hp=1psi boost? Dont think so). We flow more fuel into the cylinders per stroke, with the hotter sticks, and 5% higher fuel rate. I guess we'd be about 25hp ahead, ALL ELSE BEING EQUAL. Just wanted to clarify that for those who arent as dedicated as we are.
If you're losing bottom end, you need to back off the timing a bit. On my pickup, the 1/8" rule (along with everyo other "rule") gets tossed out the tailpipe. More like 1/16" to go from 1. 4 to 1. 7mm. I now have it in the neighborhood of 1. 6mm, and it does ok, though I leave a grey haze all over when I get into it for more than 15psi boost. I may have other issues, though, i. e. tired pump cam ring.
smokein cummins-
You are WAAYYY out of your turbo's efficiency map. As in, putting some HOT air into the intake. I'd say get a PDR HX35-16 (The good pastor now tells me they can mod your H1C the same way, allowing you to keep the stock intake hose and crossover), or maybe a 35/40 hybrid, and AN INTERCOOLER. THat will help your EGTs more than anything. You DO have the pyro in the manifold, dont you? If not, deduct 20hp, and ask the pastor for what penence you need to do.
With stock in injectors, you are stressing your pump more than I would, but I have little room to talk- I can hit 38 psi, but also have EDMs, which are a different ball of wax. BUT, keep in mind, that you only stress your pump when you use the power.
ECJay-
I wouldnt say that we start with 25hp over stock IC, as our hotter intake air deducts a goodly percentage from our power output. (do you REALLY think my 38psi converts to 10hp=1psi boost? Dont think so). We flow more fuel into the cylinders per stroke, with the hotter sticks, and 5% higher fuel rate. I guess we'd be about 25hp ahead, ALL ELSE BEING EQUAL. Just wanted to clarify that for those who arent as dedicated as we are.
Daniel,
I was referring to the performance ratings of the injectors... .
eg "Bosch 185s aka Power Wagons are listed at about + 28 hp... but they are a wash for the non I/C engines. Bully Dog + 50s (what I have) are listed as +50 for I/C but at +25 for non I/C.
(Numbers are approximate) At least that is the point I was trying to make.
I was not trying to make reference to the 10hp/psi "rule of thumb"... that's another issue. We could probably calculate the theorectical difference ... but that's too geeky for me.
Bill... I have never touched my timing. . never measured it either... engine seems very, very happy where it is, I hate to mess with it. My engine does sound a little "pingier" than most, but I only have 2nd and 3rd gens to compare to... not many 1st gens around here. Highest EGT I've seen is 1150... that's at the end of a "bonzai run".
Jay
I was referring to the performance ratings of the injectors... .
eg "Bosch 185s aka Power Wagons are listed at about + 28 hp... but they are a wash for the non I/C engines. Bully Dog + 50s (what I have) are listed as +50 for I/C but at +25 for non I/C.
(Numbers are approximate) At least that is the point I was trying to make.
I was not trying to make reference to the 10hp/psi "rule of thumb"... that's another issue. We could probably calculate the theorectical difference ... but that's too geeky for me.
Bill... I have never touched my timing. . never measured it either... engine seems very, very happy where it is, I hate to mess with it. My engine does sound a little "pingier" than most, but I only have 2nd and 3rd gens to compare to... not many 1st gens around here. Highest EGT I've seen is 1150... that's at the end of a "bonzai run".
Jay
yes i have a pyro gage. i snaped the 1/8 npt fitting off so it doesn't work right now.
I think I'd work on that before I "tweaked" much more.
Daniel,
I question that... . I know an intercooled H1C can be modified, but the compressor housing would be like an intercooled size... so those items would have to be changed.
If this is not true Pastor please speak up... I'm about to make some changes to mine.
Thanks
Jay
Yup, we can alter the old style turbo's so they perform very very close to an HX35. This does make it easier to retain your old style crossover tube and air filter/turbo tube as well.
In fact, I have a member sending me one to be done as we speak.
pb. .
In fact, I have a member sending me one to be done as we speak.
pb. .
Jay, we machine and use the same parts/wheels etc on an H1 that we use for the HX35 mods.....
You will be able to use all of your existing parts, hoses as well.
You may be able to find/buy a compressor wheel somewere but Piers does not "part out" the components. When we're finished with the turbo we do a zero balance and you know that it is built to tight spec.
Bruce, Ok,... . I'll keep my one good eye out for your stuff and we'll get on it as fast as possible..... matter of fact, I think I have an open spot on my home bench just for the other part you're sending up too..... now were did I put that cone of silence...
pb.
You will be able to use all of your existing parts, hoses as well.
You may be able to find/buy a compressor wheel somewere but Piers does not "part out" the components. When we're finished with the turbo we do a zero balance and you know that it is built to tight spec.
Bruce, Ok,... . I'll keep my one good eye out for your stuff and we'll get on it as fast as possible..... matter of fact, I think I have an open spot on my home bench just for the other part you're sending up too..... now were did I put that cone of silence...
pb.
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Issue 128 – Digital Version
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FREE!
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Renew
Subscribe
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Back Issues
Subscription Status
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Buyer's Guides
Ram Diagnostic Trouble Codes
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What Makes Us Tick?
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