Dual HPOPs
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Logistics Pro
Joined: Oct 2008
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From: Avilla, IN
Dual HPOPs
How does the TE style dual hpops circulate the oil? Does one pump feed the other or does each pump supply one head? How does it work with only one IPR?
I think the most help I would get would be if someone would post a picture up, and describe the oil 'path.'
Thanks in advance.
I think the most help I would get would be if someone would post a picture up, and describe the oil 'path.'
Thanks in advance.
Post Fiend
Joined: Mar 2007
Posts: 9,010
Likes: 5
From: Johnson City, TN.
Each head is supplied by each pump. the two pumps are "plumbed" together at the IPR and the single IPR controls both of them. Pretty simple setup honestly.
See the two red caps. That is where the lines from each head connect.
The black line is the "return" or blowback ( Ican't remember what Joey calls it). The IPR screws into the machined aluminum piece.
The oil is taken from the reservoir where the front pump connects to the reservoir.
See the two red caps. That is where the lines from each head connect.
The black line is the "return" or blowback ( Ican't remember what Joey calls it). The IPR screws into the machined aluminum piece.
The oil is taken from the reservoir where the front pump connects to the reservoir.
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Logistics Pro
Joined: Oct 2008
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From: Avilla, IN
So it is possible that the head w/o the ICP sensor could have a slightly different pressure. Or does the set-up allow for a "balancing flow?" If not, is there a way to run a HPO line between the heads to allow the pressure to be balanced?
What is the max pressure that these pumps are able to generate?
What is the max pressure that these pumps are able to generate?
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
3700+ per head. The pump cutoffs are at 3700 PSI for our trucks. It's a check valve in the pump themselves.
And the slight variances between heads you'll never notice.
the pumps are turning at the same speed so the flow should be very very close. I'm sure the injectors are not going to mind that slight variance. Its all about volume anyways, Duals provide the volume to keep up with injector demand, thus keeping a constant pressure.
There is no "balancing flow"
Each pump gets a head, thats pretty much it.
You don't run a crossover with Duals.
And the slight variances between heads you'll never notice.
the pumps are turning at the same speed so the flow should be very very close. I'm sure the injectors are not going to mind that slight variance. Its all about volume anyways, Duals provide the volume to keep up with injector demand, thus keeping a constant pressure.
There is no "balancing flow"
Each pump gets a head, thats pretty much it.
You don't run a crossover with Duals.
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Posting Guru
Joined: Jan 2006
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From: Elkhorn, WI
Does the TE setup support dual iprs? Just curious if anyones got them. On my truck we couldn't get the truck to run right with dual iprs.
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Hotshot
Joined: Oct 2003
Posts: 17,799
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From: Ashland City, TN
You mean ICP?
I've read that some people think that the single IPR isn't good enough for 2 pumps.
There are many out there who I'm sure who differ on that opinion because they are running 1 IPR.
I've heard of people running 2 ICP's too, but thats just more complication.
The pumps wont be that far out of sync that it will cause issues.
And if you were worried about that little bit of issue and are trying to make that big of power, you probably just bought 2 NEW Bosh pumps for the Duals, and they will be putting out the same amount (theoretically) because they are both new and exactly the same.
My only worry ever was that the pumps would run out of oil to pump, but apparently they wont do that either.
Which is funny, cause I think Diesel Site was trying to make or sell a reservoir enlarger thing. Basically to make it bigger. But I've not heard of any guys running out of oil for the duals to pump.
I'll email this to Joey, I'm sure he can explain how we don't run out of oil in the Res. haha.
Hotshot
Joined: Jun 2007
Posts: 10,008
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From: Austin, TX
Justin, the answer to your question is NO, the TE does not support dual IPRs. Joey feels very strongly that one IPR will flow plenty of oil for dual pumps so he won't incorporate it into his setup. Stealth was the only ones that ran dual IPRs with dual pumps. Some people say they get better tuneability with dual IPRs, some say theirs run perfect with a single IPR. It doesn't matter to me as long as it runs correctly.
The pressure between the pumps are equalized by the IPR. The pumps are plumbed together at the IPR and the single IPR controls pressure on both pumps.
The pressure between the pumps are equalized by the IPR. The pumps are plumbed together at the IPR and the single IPR controls pressure on both pumps.
Senior User
Joined: Oct 2007
Posts: 268
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From: Modesto, CA
Justin, the answer to your question is NO, the TE does not support dual IPRs. Joey feels very strongly that one IPR will flow plenty of oil for dual pumps so he won't incorporate it into his setup. Stealth was the only ones that ran dual IPRs with dual pumps. Some people say they get better tuneability with dual IPRs, some say theirs run perfect with a single IPR. It doesn't matter to me as long as it runs correctly.
The pressure between the pumps are equalized by the IPR. The pumps are plumbed together at the IPR and the single IPR controls pressure on both pumps.
The pressure between the pumps are equalized by the IPR. The pumps are plumbed together at the IPR and the single IPR controls pressure on both pumps.
As Travis said, the flow is balanced at the IPR, via the billet Remote IPR block. If one pump is weak or in some cases, one pump is a 17 and the other is a 15, the R-IPR keeps the pressure balanced.
I can install a second IPR, but it would be in the stock location.The only way to service it would be to remove the entire assembly and disassemble it(hours of labor). With the R-IPR, the IPR can be serviced/replaced in a matter of minutes.
Also, the pumps are shimmed to 3880psi after they are built. Factory blow-off is around 3600-3650 generally.
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Logistics Pro
Joined: Oct 2008
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From: Avilla, IN
So basically the two pumps both pump to the IPR, then the oil splits to the two heads.
I was wondering about the pressure becuase Hybrid injectors generate a 5:1 FP to OP ratio, but the standard (non-hybrid) injectors are 7:1. Haven't checked the numbers but I was wondering if the oil pressure could be raised enough to compensate for the lower 5:1 ratio. Now that I know the numbers, it'll be simple to check.
I was wondering about the pressure becuase Hybrid injectors generate a 5:1 FP to OP ratio, but the standard (non-hybrid) injectors are 7:1. Haven't checked the numbers but I was wondering if the oil pressure could be raised enough to compensate for the lower 5:1 ratio. Now that I know the numbers, it'll be simple to check.
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
OFF TOPIC!!! slightly I guess...
Joey, on your truck your running close to 4000 psi ICP.. Do you notice any difference with 4000 psi vs running the standard 3000-3200psi? I like the idea of being capable of running more ICP thus being able to raise injection pressure, but not sure if it makes much difference with the gen 1 HEUI injectors. I would have to assume it would make a noticable difference and help clean up smoke some. Plus, planning to run around a 350cc injector, I might like to have that extra pressure to help empty the injector in a faster time and be able to use a touch smaller nozzle.
Joey, on your truck your running close to 4000 psi ICP.. Do you notice any difference with 4000 psi vs running the standard 3000-3200psi? I like the idea of being capable of running more ICP thus being able to raise injection pressure, but not sure if it makes much difference with the gen 1 HEUI injectors. I would have to assume it would make a noticable difference and help clean up smoke some. Plus, planning to run around a 350cc injector, I might like to have that extra pressure to help empty the injector in a faster time and be able to use a touch smaller nozzle.