What fuel pump?
Thread Starter
Burning Brakes
Joined: Mar 2019
Posts: 838
Likes: 180
From: Indianapolis Indiana area
What fuel pump?
My car is an ls3 with eforce. I'm hoping to end up with 650- 700 whp. I'm planning a flex fuel set up this winter, the car already has a BAP on it. Would a Walbro 450lhp in tank be enough?
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
Single 450 on e85 probably won't get you there. Maybe a 525, but even then 700rwhp on a single pump will be a stretch.
Unless you go to something like the new ID PWM stuff coming out, that made something silly like 1400rwhp on a single pump but that won't be cheap.
Unless you go to something like the new ID PWM stuff coming out, that made something silly like 1400rwhp on a single pump but that won't be cheap.
Melting Slicks
Joined: Nov 2013
Posts: 2,049
Likes: 316
From: USA
Depends on how much ethanol you want to run. 525 is same form factor and flows about 10 percent more for normal fuel pressures and not a huge price increase. 525 over 450. But full E85 you're gonna need more. E30 you might get by.
Thread Starter
Burning Brakes
Joined: Mar 2019
Posts: 838
Likes: 180
From: Indianapolis Indiana area
Melting Slicks
Joined: Nov 2013
Posts: 2,049
Likes: 316
From: USA
If you want in tank replacement, Racetronix sells a 525 drop in pump with complete bucket and everything to keep the fuel transfer functions etc working. They have internal regulated and one that has a fitting for a return line and external regulator. Little pricey but but its a pnp solution. Been some recent discussions on here about it.
I think you'd have enough fuel but maybe not a ton a headroom..and again really depends on what level of ethanol you wanna run. E85 needs about 30 percent more volume than E10.
I think you'd have enough fuel but maybe not a ton a headroom..and again really depends on what level of ethanol you wanna run. E85 needs about 30 percent more volume than E10.
Melting Slicks
Joined: Nov 2013
Posts: 2,049
Likes: 316
From: USA
Data point I'm probably around 650whp uncorrected on centri setup with 450 in tank on a C5 but it has the C6 fuel system. Pump gas with a lityle ethnaol sometimes.
Pump is doing ok but biggest issue is losing fuel pressure at high rpm due to it still being regulated at the pump. Yes it works, but not ideal.
Pump is doing ok but biggest issue is losing fuel pressure at high rpm due to it still being regulated at the pump. Yes it works, but not ideal.
Thread Starter
Burning Brakes
Joined: Mar 2019
Posts: 838
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From: Indianapolis Indiana area
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Thread Starter
Burning Brakes
Joined: Mar 2019
Posts: 838
Likes: 180
From: Indianapolis Indiana area
Data point I'm probably around 650whp uncorrected on centri setup with 450 in tank on a C5 but it has the C6 fuel system. Pump gas with a lityle ethnaol sometimes.
Pump is doing ok but biggest issue is losing fuel pressure at high rpm due to it still being regulated at the pump. Yes it works, but not ideal.
Pump is doing ok but biggest issue is losing fuel pressure at high rpm due to it still being regulated at the pump. Yes it works, but not ideal.
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
Yes that ECS kit is more fitting as well, but your stock pump will die on e85 sooner or later, so should still be looking at a drop in pump that is flex fuel capable to put in there either way.
Melting Slicks
Joined: Nov 2013
Posts: 2,049
Likes: 316
From: USA
Yes I am running a BAP. Lingenfelter sells a drop in pump...that's what I have, supposed to be a 450. They say pump will support 900hp with a bap on pump gas. They say their claims are on the conservative side and based on actual flow measures thru the fuel system accounting for losses etc.
Melting Slicks
Joined: Nov 2003
Posts: 2,155
Likes: 269
I've made well over 600whp on a single 450lph without a BAP, was an LSA not a eforce setup not that the blower type really matters. A 450 with a BAP will cover your needs on pump gas. On real cheap setups I've made a 250lph pump and a BAP make over 600 on pump gas, not pretty or recommended but it worked.
To support flex fuel the cleanest install path to me is to add the ECS stage 1 kit (https://www.eastcoastsupercharging.c...orvette-detail) to the 450 in tank. It comes with everything needed for install, works with E85 and comes with an AEM 400lph pump despite saying 380lph in the description. I've been running it on straight E85 for awhile now without any issues and I'm leaning on it pretty hard with Bosch 210's. A 450lph and 400lph pump working together will make some decent jams.
I don't feel the A1000 flows enough to be worth the significant price increase. At 60psi the flow differences between the pumps is less then 70lph. For $500 you can get a significantly better pump to replace the AEM400 if and when you need to.
To support flex fuel the cleanest install path to me is to add the ECS stage 1 kit (https://www.eastcoastsupercharging.c...orvette-detail) to the 450 in tank. It comes with everything needed for install, works with E85 and comes with an AEM 400lph pump despite saying 380lph in the description. I've been running it on straight E85 for awhile now without any issues and I'm leaning on it pretty hard with Bosch 210's. A 450lph and 400lph pump working together will make some decent jams.
I don't feel the A1000 flows enough to be worth the significant price increase. At 60psi the flow differences between the pumps is less then 70lph. For $500 you can get a significantly better pump to replace the AEM400 if and when you need to.
Instructor
Joined: Apr 2017
Posts: 151
Likes: 60
From: Fort Worth, TX
I made a little over 750 with my eforce setup on e85. My fuel setup is pretty simple, just an external 044 and a 450 in tank. If I was dropping the tank I’d just do a 525 in there but still likely just use an 044 external as well.
Former Vendor
Joined: Feb 2012
Posts: 26,512
Likes: 351
From: ST. CHARLES IL
We sell a nice auxiliary pump that we have taken to 900rwhp. Its made by DSX and offer a very easy install (no dropping the tanks) and is about as plug and play as it gets. Hit us up if you're interested.
Pro
Joined: Mar 2018
Posts: 661
Likes: 63
From: Fresno CA
To support flex fuel the cleanest install path to me is to add the ECS stage 1 kit (https://www.eastcoastsupercharging.c...orvette-detail) to the 450 in tank. It comes with everything needed for install, works with E85 and comes with an AEM 400lph pump despite saying 380lph in the description. I've been running it on straight E85 for awhile now without any issues and I'm leaning on it pretty hard with Bosch 210's. A 450lph and 400lph pump working together will make some decent jams.
Last edited by theandrewo; Dec 10, 2019 at 04:10 AM.
Thread Starter
Burning Brakes
Joined: Mar 2019
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From: Indianapolis Indiana area
Instructor
Joined: Apr 2017
Posts: 151
Likes: 60
From: Fort Worth, TX
Melting Slicks
Joined: Nov 2003
Posts: 2,155
Likes: 269
Yes and not a problem at all. If you take a look at the included fittings the aux pumps connects to the OEM feed line post regulator. You will see higher pressure at the rail under boost, but that's also what you want.
DSX kit appears to use the same Bosch 044 that flows 300lph at 60 psi? If not can you provide specs of the pump used?
Racer
Joined: Nov 2019
Posts: 452
Likes: 51
Not to hijack, but I am also curious. Just a single drop in 450 or 525 would be good enough for 600-650 whp on 93? Don't plan on doing E85 any time soon. And with the 450 or 525 I can still use the stock return less system?