Single walbro 450 limits
Single walbro 450 limits did some searches and can't really find a answer. Wondering the hp limits of a single walbro 450 with hot wire kit on a n/a and nitrous setup on e85.
Fuel system is also a return style with a -8 feed and -6 return
Fuel system is also a return style with a -8 feed and -6 return
Last edited by 99Z28camaro; May 19, 2015 at 07:45 PM.
Teching In
Joined: Jun 2015
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Hello,
Well, according to my EFI Math app in my phone, a 450LPH pump would handle anything between 1300 and 1500 HP, assuming a BSFC of 50. Can't tell exactly about the Walbro model but a 1300-1500 hp engine with a BSFC of 50 needs a 450 LPH or 125 GPH pump. Hope this helps.
Well, according to my EFI Math app in my phone, a 450LPH pump would handle anything between 1300 and 1500 HP, assuming a BSFC of 50. Can't tell exactly about the Walbro model but a 1300-1500 hp engine with a BSFC of 50 needs a 450 LPH or 125 GPH pump. Hope this helps.
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From: Norn Iron
I'd say 1300hp is going beyond the realms of optimistic even if it was a low pressure carb application.
At around 60-70psi in only flows around 360-370lph according to Walbro themselves. Which if you're lucky might take you to around 900hp on regular fuel.
At around 60-70psi in only flows around 360-370lph according to Walbro themselves. Which if you're lucky might take you to around 900hp on regular fuel.
Launching!
Joined: Oct 2003
Posts: 267
Likes: 14
From: Chicago
Can somebody answer me.. I was thinking of going with a Walbro 450, with a boost a pump...
I am going to run an f1 a on my 383.. With 80 lb injectors... Can the stock fuel lime system handle this..
Or should I run a number 10 line, with an 8 return. I have the lines and fittings from an old race car...
I am going to run an f1 a on my 383.. With 80 lb injectors... Can the stock fuel lime system handle this..
Or should I run a number 10 line, with an 8 return. I have the lines and fittings from an old race car...
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Launching!
Joined: Oct 2003
Posts: 267
Likes: 14
From: Chicago
Also is the 450 a bolt in?
Meaning, will it fit, no problem in the stock can in the tank?
http://www.kennebell.net/KBWebsite/C...elpumptech.pdf
Kenny bell boost of pumps seem like a must. He is making a 1000 hp no problem with 360 pumps.
Meaning, will it fit, no problem in the stock can in the tank?
http://www.kennebell.net/KBWebsite/C...elpumptech.pdf
Kenny bell boost of pumps seem like a must. He is making a 1000 hp no problem with 360 pumps.
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fuel systems is one thing that has me stumped. if you go by the rating only,a single 450 pump SHOULD be able to make well over 1,100 fwhp. a single 255 can easily make north of 600 fwhp so a pump almost twice the size should be able to supply twice the volume given the same variables like no restrictions in line size, bends and proper voltage.
of course e85 takes like 30-35 % give or take more fuel so max power would drop accordingly.maybe someone with actual knowledge will swoop in and help out.
of course e85 takes like 30-35 % give or take more fuel so max power would drop accordingly.maybe someone with actual knowledge will swoop in and help out.
9 Second Club
Joined: Nov 2003
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From: Norn Iron
fuel systems is one thing that has me stumped. if you go by the rating only,a single 450 pump SHOULD be able to make well over 1,100 fwhp. a single 255 can easily make north of 600 fwhp so a pump almost twice the size should be able to supply twice the volume given the same variables like no restrictions in line size, bends and proper voltage.
of course e85 takes like 30-35 % give or take more fuel so max power would drop accordingly.maybe someone with actual knowledge will swoop in and help out.
of course e85 takes like 30-35 % give or take more fuel so max power would drop accordingly.maybe someone with actual knowledge will swoop in and help out.
Likewise a 255 is wiped out at around 500hp here in the UK.
But dyno or hp numbers etc do vary around the world.
well,for example a single 255 on my car makes 550 rwhp @ 56-58 psi,so that is well over 600 fwhp and I have saw numerous cars make more power than mine with the same pump. a 450 is 1.75 times bigger ,so just say mine had the 255 maxxed,a 450 SHOULD make 1,100 given the same variables.i honestly would not think it would support that much myself but in all reality the 255 shouldn't make that much either.
Launching!
Joined: Oct 2003
Posts: 267
Likes: 14
From: Chicago
The walbro 450 flows 290 lpm at 60 psi, however with a boost of pump, at 20 volts, you can push it to 700 plus liter per min...
Read up on the tech... Amazing actually..
http://www.kennebell.net/KBWebsite/C...elpumptech.pdf
Read up on the tech... Amazing actually..
http://www.kennebell.net/KBWebsite/C...elpumptech.pdf
Launching!
Joined: Oct 2003
Posts: 267
Likes: 14
From: Chicago
Guys I called Kenny bell, the biggest pump, that can be run with the boost of pump, is the 320 aem pump, or the 255 LPh Walbro 340ss...
The reason why, is they pull to much amps.. Yes, the Kenny bell boost of pump, is good for 700 to 800 rwh on a 255 LPh pump at 20 volts. You can make a Walbro 340 255 LPh pump flow 400 at 18 volts. But is not the way I went.
I called ractronics, he hooked me up with twin 340S, garauntied 650 plus liters per hour at 13.5 volts. Enough to support 1400 hp...
He put, my mind at ease.
I am soon going to running an f1 a on nitrous. He put my mind at ease, sold me an entire plug and play system. Jack at ractronics is a hell of a guy.
Don't mess around, get the twin 255s or the 340 pumps from him.
The boost of pump is nice, but if you guys are planing to run big power you need the twin pump set up.
To be ran on a hobbs switch. Where the second pump comes in , around 7 pounds of boost.
The reason why, is they pull to much amps.. Yes, the Kenny bell boost of pump, is good for 700 to 800 rwh on a 255 LPh pump at 20 volts. You can make a Walbro 340 255 LPh pump flow 400 at 18 volts. But is not the way I went.
I called ractronics, he hooked me up with twin 340S, garauntied 650 plus liters per hour at 13.5 volts. Enough to support 1400 hp...
He put, my mind at ease.
I am soon going to running an f1 a on nitrous. He put my mind at ease, sold me an entire plug and play system. Jack at ractronics is a hell of a guy.
Don't mess around, get the twin 255s or the 340 pumps from him.
The boost of pump is nice, but if you guys are planing to run big power you need the twin pump set up.
To be ran on a hobbs switch. Where the second pump comes in , around 7 pounds of boost.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Not sure if flow data posted everywhere is wrong, but at a normal efi working pressure, all flow data graphs suggest a typical 340 pump flows around 250-260lph at around 60-70psi and 13.5v
It is still good, but a far cry from 650lph.
take that to 80psi and it's right down to 225lph each
Maybe there are some different test conditions they're using to see those higher figures, but there are numerous graphs online which contradict such high numbers.
Unless they're referring to a 45psi fuel pressure base n/a setup in which case they would flow a lot more.
It is still good, but a far cry from 650lph.
take that to 80psi and it's right down to 225lph each
Maybe there are some different test conditions they're using to see those higher figures, but there are numerous graphs online which contradict such high numbers.
Unless they're referring to a 45psi fuel pressure base n/a setup in which case they would flow a lot more.
Guys I called Kenny bell, the biggest pump, that can be run with the boost of pump, is the 320 aem pump, or the 255 LPh Walbro 340ss...
The reason why, is they pull to much amps.. Yes, the Kenny bell boost of pump, is good for 700 to 800 rwh on a 255 LPh pump at 20 volts. You can make a Walbro 340 255 LPh pump flow 400 at 18 volts. But is not the way I went.
I called ractronics, he hooked me up with twin 340S, garauntied 650 plus liters per hour at 13.5 volts. Enough to support 1400 hp...
He put, my mind at ease.
I am soon going to running an f1 a on nitrous. He put my mind at ease, sold me an entire plug and play system. Jack at ractronics is a hell of a guy.
Don't mess around, get the twin 255s or the 340 pumps from him.
The boost of pump is nice, but if you guys are planing to run big power you need the twin pump set up.
To be ran on a hobbs switch. Where the second pump comes in , around 7 pounds of boost.
The reason why, is they pull to much amps.. Yes, the Kenny bell boost of pump, is good for 700 to 800 rwh on a 255 LPh pump at 20 volts. You can make a Walbro 340 255 LPh pump flow 400 at 18 volts. But is not the way I went.
I called ractronics, he hooked me up with twin 340S, garauntied 650 plus liters per hour at 13.5 volts. Enough to support 1400 hp...
He put, my mind at ease.
I am soon going to running an f1 a on nitrous. He put my mind at ease, sold me an entire plug and play system. Jack at ractronics is a hell of a guy.
Don't mess around, get the twin 255s or the 340 pumps from him.
The boost of pump is nice, but if you guys are planing to run big power you need the twin pump set up.
To be ran on a hobbs switch. Where the second pump comes in , around 7 pounds of boost.
Does anybody have anymore info on this? Wondering if i'd have any issues running a walbro 450 pump for e85 and adding a BAP/Racetronix harness
thanks,
I had a 255 pump with a hot wire kit in my 550rwhp car and I ran E85 for 5 years and never had an issue. I swapped out the pump for a 340 for piece of mind and so I could run a shot of nitrous. In theory, the 255 should have ran out of fuel but it didn't. I ran stock lines with the stock regulator and billet fuel rail
Launching!
Joined: Oct 2003
Posts: 267
Likes: 14
From: Chicago
Your right, Racetronics hooked me up, also, I got the twin 340s, as far as the Boost of pump, it does not work on the bigger pumps. 340 and above, because they pull to much amps.