[Dave W.]

The fuel pump 'science experiment' in Shiv's car is much different than the LPFP upgrade that's currently running in many cars ATM. Just ask anyone who got the new Vishnu/FFtec LPFP upgrade, their trunk looks normal.

[Wedge1967]

Originally Posted by CaptainInsano

Looks much simpler than what was in Shivs car before.

Yeah, they did a really nice job with this. Factory type connectors, no cutting the lines like other solutions. I'm really happy with it and have been running 100% e85 for the past three weeks. The only time I ran pump fuel was on my way home from Shift S3ctor. Ended up getting 29 mpg on that long drive...

[Dmacc]

Originally Posted by Dave W.

The fuel pump 'science experiment' in Shiv's car is much different than the LPFP upgrade that's currently running in many cars ATM. Just ask anyone who got the new Vishnu/FFtec LPFP upgrade, their trunk looks normal.

My tiny 135i trunk is normal

[Ænema]

Originally Posted by Wedge1967

Yeah, they did a really nice job with this. Factory type connectors, no cutting the lines like other solutions. I'm really happy with it and have been running 100% e85 for the past three weeks. The only time I ran pump fuel was on my way home from Shift S3ctor. Ended up getting 29 mpg on that long drive...

Now that looks acceptable.

[ign335i]

How is this better than running the E85 pump DIY? The E85 pump already turns the HPFP into the limitation, unless of course this runs higher pressure or is placed closer to the engine, but then how does it cool?

Sorry to derail.

[MikeB@fftec]

Originally Posted by ign335i

How is this better than running the E85 pump DIY? The E85 pump already turns the HPFP into the limitation, unless of course this runs higher pressure or is placed closer to the engine, but then how does it cool?

Sorry to derail.

This is an in-line fuel pump system that retains all the factory fuel syphons. This works in conjunction with the factory low pressure fuel pump. The standard Walbro 400 that others are using alone doesn't flow well at the higher fuel pressures which are required for this application. Our in-tank, fuel system runs the fuel pumps in series, substantially increasing fuel volume at the high fuel pressures this application demands.

[Mike@N54Tuning.com]

Originally Posted by MikeB@fftec

This is an in-line fuel pump system that retains all the factory fuel syphons. This works in conjunction with the factory low pressure fuel pump. The standard Walbro 400 that others are using alone doesn't flow well at the higher fuel pressures which are required for this application. Our in-tank, fuel system runs the fuel pumps in series, substantially increasing fuel volume at the high fuel pressures this application demands.

This looks like a nice clean setup. What is retail on it?

The Walbro E85 pump (the $179 one in the DIY) is rated for 355lph @ 70psi, which should be good for around 650whp on E85 without meth using a BSFC of .70. Of course, they make larger in tank pumps that will install just as easily. This one was just a good fit based on the cost and general specs and has been well proven in other applications.

Mik,e

[Sparky68]

are the ST guys beating the RB or standard turbo guys on acceleration? For me at some point you are going to get traction issues as we push the envelope forward have tuners reached the upper limit of what the n54 can put down on the road?

[AK 335i]

Originally Posted by Sparky68

are the ST guys beating the RB or standard turbo guys on acceleration? For me at some point you are going to get traction issues as we push the envelope forward have tuners reached the upper limit of what the n54 can put down on the road?

yes the st are raking the RB guys over the coals. the st cannot be foxed with except by a fox body 5.0 on NAWS

[Dmacc]

Originally Posted by Sparky68

are the ST guys beating the RB or standard turbo guys on acceleration? For me at some point you are going to get traction issues as we push the envelope forward have tuners reached the upper limit of what the n54 can put down on the road?

FBIS is making 650whp and with his R888's he's able to hook in second gear easily in his 6mt. He has the suspension mods, the dss axles, and an LSD to let him do so though.

[Sparky68]

Originally Posted by Dmacc

FBIS is making 650whp and with his R888's he's able to hook in second gear easily in his 6mt. He has the suspension mods, the dss axles, and an LSD to let him do so though.

So there comes a point where without some major upgrades you are going to struggle to put it down? Is there a possibility then that a FBO car without major suspension mods,trick tyres may as well settle at 550bhp?

[AK 335i]

Originally Posted by Sparky68

So there comes a point where without some major upgrades you are going to struggle to put it down? Is there a possibility then that a FBO car without major suspension mods,trick tyres may as well settle at 550bhp?

that's my plan exactly

[ign335i]

Originally Posted by MikeB@fftec

This is an in-line fuel pump system that retains all the factory fuel syphons. This works in conjunction with the factory low pressure fuel pump. The standard Walbro 400 that others are using alone doesn't flow well at the higher fuel pressures which are required for this application. Our in-tank, fuel system runs the fuel pumps in series, substantially increasing fuel volume at the high fuel pressures this application demands.

I am confused, so you raised the fuel pressure of the low pressure system? The E85 Walbro is holding LP while high pressure is falling as measured by the LP sensor right next to the HPFP. To me that indicates the E85 Walbro pump supplies enough volume (since the two are linked due to line size) and that it turns the HPFP into the limitation. What am I missing?

[cupertinosteve]

just got back from a week in Tahoe with no internet. It felt great.

I'm making more than my initial 573WHP without all all the "supporting" mods (axles, sticky tires, coil overs ...) and doing just fine. Its fun lighting up the rears, especially on those lovely butterfly on ramps in the rain.

Just to make a quick comment ... I'm incredibly happy with the performance gains of the single turbo vs. my FBO+meth setup. From my subjective butt dyno, i know i'm making more power and having a lot more fun.

I almost forgot what wastegate rattle sounded like (until I was walking in the crosswalk and hear it again - yuck).

On the day to day basis, its just like any other car sitting in commuter traffic ... except when you get to open it up and then left off quickly - the sound of the turbo is pretty fun to listen to.

[Wedge1967]

Originally Posted by cupertinosteve

just got back from a week in Tahoe with no internet. It felt great.

I'm making more than my initial 573WHP without all all the "supporting" mods (axles, sticky tires, coil overs ...) and doing just fine. Its fun lighting up the rears, especially on those lovely butterfly on ramps in the rain.

Just to make a quick comment ... I'm incredibly happy with the performance gains of the single turbo vs. my FBO+meth setup. From my subjective butt dyno, i know i'm making more power and having a lot more fun.

I almost forgot what wastegate rattle sounded like (until I was walking in the crosswalk and hear it again - yuck).

On the day to day basis, its just like any other car sitting in commuter traffic ... except when you get to open it up and then left off quickly - the sound of the turbo is pretty fun to listen to.

haha, you sound like a kid in a candy store...

[The Ghost]

Originally Posted by MikeB@fftec

This is an in-line fuel pump system that retains all the factory fuel syphons. This works in conjunction with the factory low pressure fuel pump. The standard Walbro 400 that others are using alone doesn't flow well at the higher fuel pressures which are required for this application. Our in-tank, fuel system runs the fuel pumps in series, substantially increasing fuel volume at the high fuel pressures this application demands.

Retail ETA please?

[SIKH335]

Originally Posted by Mike@N54Tuning.com

This looks like a nice clean setup. What is retail on it?

The Walbro E85 pump (the $179 one in the DIY) is rated for 355lph @ 70psi, which should be good for around 650whp on E85 without meth using a BSFC of .70. Of course, they make larger in tank pumps that will install just as easily. This one was just a good fit based on the cost and general specs and has been well proven in other applications.

Mik,e

What's up Terry!!!!

[Tzu]

Originally Posted by SIKH335

What's up Terry!!!!

Hey Shiv!

[AK 335i]

lulz dorks

[Dave W.]

Originally Posted by Mike@N54Tuning.com

This looks like a nice clean setup. What is retail on it?

The Walbro E85 pump (the $179 one in the DIY) is rated for 355lph @ 70psi, which should be good for around 650whp on E85 without meth using a BSFC of .70. Of course, they make larger in tank pumps that will install just as easily. This one was just a good fit based on the cost and general specs and has been well proven in other applications.

Mik,e

So you claim Terry's DIY pump is good for 650whp on E85, yet he already posted datalogs showing LPFP pressure dropping off at the 525whp level? How did we get such radically different views of the same data?

355lph @70psi is very optimistic since Terry's DIY pump is not very well thought out. He uses a T fitting for one of the large siphons which hijacks a large portion of the pumps output. And who says the stock pump was that bad anyway? He removed a perfectly good stock pump and replaced it with a bigger pump, then promptly cut it's capacity in half with all the DIY hardware store plumbing. There's still a big question about how he handles the various siphons, plus the issue with the fuel level sender has never been addressed. There's plenty of datalogs from Terry's DIY pump showing that it only helps a little, hardly worth it for all the trouble.

The fuel system on the 335 is just that; a system. Any upgrade must be integrated with the other components in the fuel system before it can be considered a true upgrade.

[Fully_Bolted]

Originally Posted by Dave W.

So you claim Terry's DIY pump is good for 650whp on E85, yet he already posted datalogs showing LPFP pressure dropping off at the 525whp level? How did we get such radically different views of the same data?

355lph @70psi is very optimistic since Terry's DIY pump is not very well thought out. He uses a T fitting for one of the large siphons which hijacks a large portion of the pumps output. And who says the stock pump was that bad anyway? He removed a perfectly good stock pump and replaced it with a bigger pump, then promptly cut it's capacity in half with all the DIY hardware store plumbing. There's still a big question about how he handles the various siphons, plus the issue with the fuel level sender has never been addressed. There's plenty of datalogs from Terry's DIY pump showing that it only helps a little, hardly worth it for all the trouble.

The fuel system on the 335 is just that; a system. Any upgrade must be integrated with the other components in the fuel system before it can be considered a true upgrade.

I've never seen data showing the upgraded LPFP couldnt keep up with demands, his HPFP wasnt meeting requested....

Can you point me to where his Low pressure was not meeting requested?

[Mike@N54Tuning.com]

Originally Posted by Dave W.

So you claim Terry's DIY pump is good for 650whp on E85, yet he already posted datalogs showing LPFP pressure dropping off at the 525whp level? How did we get such radically different views of the same data?

355lph @70psi is very optimistic since Terry's DIY pump is not very well thought out. He uses a T fitting for one of the large siphons which hijacks a large portion of the pumps output. And who says the stock pump was that bad anyway? He removed a perfectly good stock pump and replaced it with a bigger pump, then promptly cut it's capacity in half with all the DIY hardware store plumbing. There's still a big question about how he handles the various siphons, plus the issue with the fuel level sender has never been addressed. There's plenty of datalogs from Terry's DIY pump showing that it only helps a little, hardly worth it for all the trouble.

The fuel system on the 335 is just that; a system. Any upgrade must be integrated with the other components in the fuel system before it can be considered a true upgrade.

Maybe you missed the data they posted? The OEM pump would drop low pressure to 45psi at peak HP. The Walbro holds it at 70psi to peak HP. The siphons, fuel level sender, etc, are all the same as stock. The same amount of fluid is used to run the passenger and drive side siphon as stock as the venturi jet is unchanged and the pressure (which is regulated by the regulator) is unchanged.

Mike