twin pump write up!!
Pro
Joined: Feb 2011
Posts: 693
Likes: 6
From: Lancaster Ca. & Post whoring here.
.
Never found a complete writeup. However I've compiled some bookmarks during the course of my research.
Maybe others can chime in and provide a compete how-to and/or advise.
Fuel systems are not a one size fits all solution because there is many different options and needs.
Hopefully the myriad of links below will be at least little helpful.
http://realstreetperformance.com/sto...on-test-5.html
http://forums.corvetteforum.com/c5-t...ll-w-pics.html
http://forums.corvetteforum.com/c6-f...ump-setup.html
http://forums.corvetteforum.com/c6-c...uel-pumps.html
http://www.powertraincontrolsolution...ual_rev1.1.pdf
http://www.aacorvette.com/pdf/aa_fue...structions.pdf
http://forums.corvetteforum.com/c5-f...it-for-fi.html
http://forums.corvetteforum.com/c6-z...el-system.html
.
Never found a complete writeup. However I've compiled some bookmarks during the course of my research.
Maybe others can chime in and provide a compete how-to and/or advise.
Fuel systems are not a one size fits all solution because there is many different options and needs.
Hopefully the myriad of links below will be at least little helpful.
http://realstreetperformance.com/sto...on-test-5.html
http://forums.corvetteforum.com/c5-t...ll-w-pics.html
http://forums.corvetteforum.com/c6-f...ump-setup.html
http://forums.corvetteforum.com/c6-c...uel-pumps.html
http://www.powertraincontrolsolution...ual_rev1.1.pdf
http://www.aacorvette.com/pdf/aa_fue...structions.pdf
http://forums.corvetteforum.com/c5-f...it-for-fi.html
http://forums.corvetteforum.com/c6-z...el-system.html
.
Last edited by bearcatt; May 10, 2012 at 06:31 PM.
CF Senior Moments Member
Joined: Jan 2004
Posts: 1,329
Likes: 1
From: Oklahoma City Oklahoma
I would suggest to call Lonnie - They / he - provides great support!
E-mail: Orders: Sales@LonniesPerformance.com
Tracking/Delivery: Support@LonniesPerformance.com
Tech Questions/Inquiries: Info@LonniesPerformance.com
Last edited by 1stGlance; May 10, 2012 at 04:42 PM.
Pro
Joined: Feb 2011
Posts: 693
Likes: 6
From: Lancaster Ca. & Post whoring here.
A lot of the folks that run these have the second pump activated via a hobs switch - so it doesn't run all them time. It only really needs to come on when you put your foot into it - no all the time when your just cruising or normal highway driving....
I would suggest to call Lonnie - They / he - provides great support!
E-mail: Orders: Sales@LonniesPerformance.com
Tracking/Delivery: Support@LonniesPerformance.com
Tech Questions/Inquiries: Info@LonniesPerformance.com
I would suggest to call Lonnie - They / he - provides great support!
E-mail: Orders: Sales@LonniesPerformance.com
Tracking/Delivery: Support@LonniesPerformance.com
Tech Questions/Inquiries: Info@LonniesPerformance.com
The hobbs switch seems like good idea.
What about using a good second external pump instead of two intank pumps, plus also upgrading the single internal pump.
I have the later style top mounted fuel system.
.
CF Senior Moments Member
Joined: Jan 2004
Posts: 1,329
Likes: 1
From: Oklahoma City Oklahoma
( it will require drilling a hole in the tank for the second pump)
Pro
Joined: Feb 2011
Posts: 693
Likes: 6
From: Lancaster Ca. & Post whoring here.
I wish the late 2003+ Vettes had the side mount setup.
I found this ECS fuelblock video a while back.
http://www.youtube.com/watch?v=ZN6Kyaoyd6I&lr=1
Melting Slicks
Joined: Jan 2009
Posts: 2,127
Likes: 33
From: Easley/Anderson South Carolina
I dislike having a pump come on at a set PSI, like say 2psi, and then cut off shortly after. To me that seems like adding an undue stress to the system let alone a shock of fuel to the rails at an off time. Even if you dont need all that fuel right then.
Having all the fuel ready means not having to tune arroud a super rich condition due to the spike in fuel volume/pressure, and then having to tune for when that pump shuts down. It would be a hole lot easier, and marginally safer, to tune for all the fuel at all the time. But that is my opinion and we are all intitled to have one.
My DYI fuel system will have both pumps all the time.
Having all the fuel ready means not having to tune arroud a super rich condition due to the spike in fuel volume/pressure, and then having to tune for when that pump shuts down. It would be a hole lot easier, and marginally safer, to tune for all the fuel at all the time. But that is my opinion and we are all intitled to have one.
My DYI fuel system will have both pumps all the time.
Pro
Joined: Feb 2011
Posts: 693
Likes: 6
From: Lancaster Ca. & Post whoring here.
I dislike having a pump come on at a set PSI, like say 2psi, and then cut off shortly after. To me that seems like adding an undue stress to the system let alone a shock of fuel to the rails at an off time. Even if you dont need all that fuel right then.
Having all the fuel ready means not having to tune arroud a super rich condition due to the spike in fuel volume/pressure, and then having to tune for when that pump shuts down. It would be a hole lot easier, and marginally safer, to tune for all the fuel at all the time. But that is my opinion and we are all intitled to have one.
My DYI fuel system will have both pumps all the time.
Having all the fuel ready means not having to tune arroud a super rich condition due to the spike in fuel volume/pressure, and then having to tune for when that pump shuts down. It would be a hole lot easier, and marginally safer, to tune for all the fuel at all the time. But that is my opinion and we are all intitled to have one.
My DYI fuel system will have both pumps all the time.
Would that spike in fuel show up in the air/fuel ratio on data-logs or a dyno. Just curious.
.
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Intermediate
Joined: Mar 2011
Posts: 31
Likes: 1
If you let the fuel pressure drop before kicking in the second pump then yes it would show up. The key is kicking it in while you still have constant pressure.
Pro
Joined: Feb 2011
Posts: 693
Likes: 6
From: Lancaster Ca. & Post whoring here.
As long as the setup is, well, setup properly then everything is fine with a hobbs switch. If you have 58psi at the rail and the second pump kicks in and maintains 58 at the rail then no issue.
If you let the fuel pressure drop before kicking in the second pump then yes it would show up. The key is kicking it in while you still have constant pressure.
If you let the fuel pressure drop before kicking in the second pump then yes it would show up. The key is kicking it in while you still have constant pressure.
Thanks for answering my question.
.
CF Senior Moments Member
Joined: Jan 2004
Posts: 1,329
Likes: 1
From: Oklahoma City Oklahoma
I dislike having a pump come on at a set PSI, like say 2psi, and then cut off shortly after. To me that seems like adding an undue stress to the system let alone a shock of fuel to the rails at an off time. Even if you dont need all that fuel right then.
Having all the fuel ready means not having to tune arroud a super rich condition due to the spike in fuel volume/pressure, and then having to tune for when that pump shuts down. It would be a hole lot easier, and marginally safer, to tune for all the fuel at all the time. But that is my opinion and we are all intitled to have one.
My DYI fuel system will have both pumps all the time.
Having all the fuel ready means not having to tune arroud a super rich condition due to the spike in fuel volume/pressure, and then having to tune for when that pump shuts down. It would be a hole lot easier, and marginally safer, to tune for all the fuel at all the time. But that is my opinion and we are all intitled to have one.
My DYI fuel system will have both pumps all the time.
Thread Starter
Racer
Joined: Oct 2011
Posts: 342
Likes: 0
From: Seymour Indiana
I currently have a 97/98 style setup with and Aeromotovile stealth 340lph, Kenne bell BAP, and aeromotive regulator. I just want to put another 340 in the tank. From what i have read so far i will need to ditch the BAP.
Premium Supporting Vendor
Joined: Oct 2004
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
For a street car running both pumps all the time will eventually cause an over heating problem with the fuel on warmer days. You can actually hear the fuel boil in the tank.
A proper regulator should eliminate any spikes etc when the second pump kicks on.
http://www.eastcoastsupercharging.co...category_id=89
A proper regulator should eliminate any spikes etc when the second pump kicks on.
http://www.eastcoastsupercharging.co...category_id=89
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
I have twin pumps in my car and have for years. Both run all the time. Down here is some of the hottest, most humid weather you will see and I have no issues. Not saying everyone will be issue free, but in my experience, it's been perfect.
Pro
Joined: Feb 2011
Posts: 693
Likes: 6
From: Lancaster Ca. & Post whoring here.
For a street car running both pumps all the time will eventually cause an over heating problem with the fuel on warmer days. You can actually hear the fuel boil in the tank.
A proper regulator should eliminate any spikes etc when the second pump kicks on.
http://www.eastcoastsupercharging.co...category_id=89
A proper regulator should eliminate any spikes etc when the second pump kicks on.
http://www.eastcoastsupercharging.co...category_id=89
Wow! Fuel boiling in the tank is crazy.
.
Pro
Joined: Feb 2011
Posts: 693
Likes: 6
From: Lancaster Ca. & Post whoring here.
.
Pro
Joined: Feb 2011
Posts: 693
Likes: 6
From: Lancaster Ca. & Post whoring here.
Which fuel pumps do you have installed in tank ?
.
Life Time NCM #2196
Joined: Sep 2004
Posts: 82,586
Likes: 1,697
From: Converse TX
that is how I ran mine, custom made with two LPE pumps, no BAP, 97-98 fuel setup run through an aero motive regulator, and 80# injectors, work fine in the Texas heat. I seldom let my tank get under 3/8 so plenty of fuel for cooling.
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
Thread Starter
Racer
Joined: Oct 2011
Posts: 342
Likes: 0
From: Seymour Indiana
