[Boostedphil698]

Does anyone have information on how to run a stage 3.5 LPFP without melting the stock EKP? I'm going to need something to support at least 700hp on E85.

[-Eidos]

Originally Posted by Boostedphil698

Does anyone have information on how to run a stage 3.5 LPFP without melting the stock EKP? I'm going to need something to support at least 700hp on E85.

What's the primary pump and the secondary pump?

And what's your current setup and budget? Do you have a motiv reflex?

[Boostedphil698]

Originally Posted by -Eidos

What's the primary pump and the secondary pump?

And what's your current setup and budget? Do you have a motiv reflex?

It would be the Walboro 450/525. It's Percision Racewerks 3.5 pump.

[n55david]

Originally Posted by Boostedphil698

Does anyone have information on how to run a stage 3.5 LPFP without melting the stock EKP? I'm going to need something to support at least 700hp on E85.

Keep spare modified ekps on hand..

[Boostedphil698]

Originally Posted by n55david

Keep spare modified ekps on hand..

I was looking at the ET3 design one. Percision Racewerks says that the 3.5 doesn't need a upgraded EKP which is odd

[-Eidos]

Originally Posted by Boostedphil698

I was looking at the ET3 design one. Percision Racewerks says that the 3.5 doesn't need a upgraded EKP which is odd

If you look at the exposed stainless steel terminals for the 525 on the top hat you'll see that it doesn't specifically wire up to an output of an EKP. Precision says this because the assumption is you'll control the 525 via a Hobbs switch (binary on/off) or a motiv reflex (on/off or maybe pwm).

These routes will likely not require an upgraded EKP because the 450 (which does plug into an EKP like stock) generally plays nice with the stock EKP.

That said, if you don't want to control the 525 via a Hobbs switch or motiv reflex, your other option is sourcing an aftermarket upgraded EKP that can support two pumps which will control both via CAN (OEM control) in parallel. This would be a EOS BPM4 by Torqbyte or a potentially modified EKP that has two pump outputs if that exists. I have a source for PM4s if this is what you need.

One potential caveat on leaving the 525 on all of the time (which could happen if you controlled it via CAN) is that it produces a lot of amps and therefore heat. The stainless steel studs on the top hat for the 525 could potentially melt the stock plastic top hat due to its resistance. A copper stud here would help mitigate that by a lot.

[Boostedphil698]

Originally Posted by -Eidos

If you look at the exposed stainless steel terminals for the 525 on the top hat you'll see that it doesn't specifically wire up to an output of an EKP. Precision says this because the assumption is you'll control the 525 via a Hobbs switch (binary on/off) or a motiv reflex (on/off or maybe pwm).

These routes will likely not require an upgraded EKP because the 450 (which does plug into an EKP like stock) generally plays nice with the stock EKP.

That said, if you don't want to control the 525 via a Hobbs switch or motiv reflex, your other option is sourcing an aftermarket upgraded EKP that can support two pumps which will control both via CAN (OEM control) in parallel. This would be a EOS BPM4 by Torqbyte or a potentially modified EKP that has two pump outputs if that exists. I have a source for PM4s if this is what you need.

One potential caveat on leaving the 525 on all of the time (which could happen if you controlled it via CAN) is that it produces a lot of amps and therefore heat. The stainless steel studs on the top hat for the 525 could potentially melt the stock plastic top hat due to its resistance. A copper stud here would help mitigate that by a lot.

Does EOS even still sell their option? The whole idea to run a big pump like this is to give head room and not run the fuel system at 100%. I'm not going to be doing port injection either. I'm going to be running the dorch lift kit plus their stage 2 pump.

[YASBBYM3]

Originally Posted by Boostedphil698

Does anyone have information on how to run a stage 3.5 LPFP without melting the stock EKP? I'm going to need something to support at least 700hp on E85.

Originally Posted by n55david

Keep spare modified ekps on hand..

The correct answer is never use a ekps to begin with.

Use the ET3 unit available from Amazon or there are posts that a new person is working with TB to rerelease their former EOS BMP4 unit.

[Boostedphil698]

Originally Posted by YASBBYM3

The correct answer is never use a ekps to begin with.

Use the ET3 unit available from Amazon or there are posts that a new person is working with BT to rerelease their former EOS BMP4 unit.

But isn't the ET3 just an upgrades stock EKP?

[YASBBYM3]

Originally Posted by Boostedphil698

But isn't the ET3 just an upgrades stock EKP?

He’s made modifications to it. I purchased the EOS BPM4 2 weeks before it was offered to the public so never needed an ET3.

I have connected several heavily modded users with him pre-mass production and their unit are delivering flawlessly a year or so later. It’s the current easiest cost effective solution.

Regardless what anyone tells you, I’ve seen Walbro 450 and 535 both burn up EKPS units. I’d rather not be on the side of the road and then on a flatbed for that reason.

[-Eidos]

Originally Posted by Boostedphil698

Does EOS even still sell their option? The whole idea to run a big pump like this is to give head room and not run the fuel system at 100%. I'm not going to be doing port injection either. I'm going to be running the dorch lift kit plus their stage 2 pump.

EOS does not sell it directly. Torqbyte which created the units for them still do on the side (I have a brand new one that's available).

And you're right. Having that extra headroom is nice. I run a similar setup with the Dorch lift kit and Nostrum stage 2 injectors - no port injection. My PM4 is still running strong to this day supporting this 100% E85, direct injection only, 717whp setup.

[Boostedphil698]

Originally Posted by -Eidos

EOS does not sell it directly. Torqbyte which created the units for them still do on the side (I have a brand new one that's available).

And you're right. Having that extra headroom is nice. I run a similar setup with the Dorch lift kit and Nostrum stage 2 injectors - no port injection. My PM4 is still running strong to this day supporting this 100% E85, direct injection only, 717whp setup.

What is your current full fuel setup for LPFP? Do you think the ET3 Design one would handle the extra power draw?

[-Eidos]

Originally Posted by YASBBYM3

He’s made modulations to it. I purchased the EOS BPM4 2 weeks before it was offered to the public so never needed an ET3.

I have connected several heavily modded users with him pre-mass production and their unit are delivering flawlessly a year or so later. It’s the current easiest cost effective solution.

Regardless what anyone tells you, I’ve seen Walbro 450 and 535 both burn up EKPS units. I’d rather not be on the side of the road and then on a flatbed for that reason.

The ET3 seems really good cost effective wise to control a single pump. The PM4 by Torqbyte (Made popular by EOS) is still the best for two pump control solutions (The build quality is so good the unit will likely outlast your motor) if you don't run a Hobbs switch or you have a motiv reflex to ramp up the secondary pump when needed which would be a little better than the parallel output that the PM4 has.

[-Eidos]

Originally Posted by Boostedphil698

What is your current full fuel setup for LPFP? Do you think the ET3 Design one would handle the extra power draw?

I'm working on a custom setup currently so I can't comment fully here. But my prior LPFP setup was just a Walbro 535 with a PM4 to support. Presently, my Walbro 535 has seen its days and doesn't flow nearly as much as it did when I first purchased it.

The ET3 Design will handle the Walbro 450 just fine. You need to figure out how you'll want to power the second pump (Walbro 525). As I mentioned earlier this secondary pump will not be controlled by the EKP.

[YASBBYM3]

Originally Posted by -Eidos

The ET3 seems really good cost effective wise to control a single pump. The PM4 by Torqbyte (Made popular by EOS) is still the best for two pump control solutions (The build quality is so good the unit will likely outlast your motor) if you don't run a Hobbs switch or you have a motiv reflex to ramp up the secondary pump when needed which would be a little better than the parallel output that the PM4 has.

Hobbs switches are disasters waiting to happen.

[Boostedphil698]

Originally Posted by YASBBYM3

Hobbs switches are disasters waiting to happen.

I agree with this. I need a solution that's electronic.

[Boostedphil698]

Originally Posted by -Eidos

I'm working on a custom setup currently so I can't comment fully here. But my prior LPFP setup was just a Walbro 535 with a PM4 to support. Presently, my Walbro 535 has seen its days and doesn't flow nearly as much as it did when I first purchased it.

The ET3 Design will handle the Walbro 450 just fine. You need to figure out how you'll want to power the second pump (Walbro 525). As I mentioned earlier this secondary pump will not be controlled by the EKP.

The percision racewerks kit says it just drop on and go, so wouldn't it be powered by the ET3? I may talk to Tyspeed in NJ about doing a stand alone solution if I can't find something already offered.

[YASBBYM3]

Originally Posted by Boostedphil698

The percision racewerks kit says it just drop on and go, so wouldn't it be powered by the ET3? I may talk to Tyspeed in NJ about doing a stand alone solution if I can't find something already offered.

Get a dual channel PM4 TB unit

The EKPS is only part of the issue. The OEM wiring and fuses are not high enough gauge to handle these higher amperage LPFPs.

[-Eidos]

Originally Posted by YASBBYM3

Hobbs switches are disasters waiting to happen.

Indeed. It "works", so people on a tight budget lean towards it. The proper route is to have the secondary pump be CAN integrated via a Motiv Reflex or something like the PM4. The cool thing with the PM4 is its fault duty settings so if connection was ever lost you can limp home on a flat duty cycle setting.

If the stock ekp or ET3 ever burnt out despite the pump(s) still being good you wouldn't be able to limp home.

[-Eidos]

Originally Posted by Boostedphil698

The percision racewerks kit says it just drop on and go, so wouldn't it be powered by the ET3? I may talk to Tyspeed in NJ about doing a stand alone solution if I can't find something already offered.

I would give the product description a read again. They sell the kit with a Hobbs switch, so their "intention" is for you to run the Walbro 450 with an EKP and the Walbro 525 via a Hobbs switch.

[YASBBYM3]

Originally Posted by -Eidos

I would give the production description a read again. They sell the kit with a Hobbs switch, so their "intention" is for you to run the Walbro 450 with an EKP and the Walbro 525 via a Hobbs switch.

I’ve seen many Walbro 450s not to mention 535s take out a EKPS or worse.

[-Eidos]

Originally Posted by YASBBYM3

I’ve seen many Walbro 450s not to mention 535s take out a EKPS or worse.

Yup, if it was up to me I wouldn't take the chance. With the price point of the ET3 unit it makes slightly less sense to stay with an OEM unit these days and replacing it with another OEM unit once the old one goes out.

If the low side every goes out while you're driving you're literally shit out of luck and the car will die on you. Not a situation you want to be in if you're on a road trip somewhere or in the middle of rush hour.