walbro 400lph?
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walbro 400lph?
hi everybody
just about o rebuild my engine just do put a T04S on it with 550cc and RC's 1300cc injecotrs to get about 400rwhp out of the enginge
now had a walbro 255lph pump in, that is going to be at is peak whit 400rwhp, so thinking about the walbros new 400lph...
my idea was to run standard fuellines and fpr, as much stock as possible.. or will the pump produce to much pressure so the lines and fpr will be to limiting for the setup??
a friend gets 400hp in engine, out of stock injectors and stock fuellines and a 255lph pump... is the differense so mutch that its nessacary to change anything?
the fuelfilter is upgraded already, since I know that was somewaht limiting already at 350 hp in the enginge with BPU
/niklas
sweden
just about o rebuild my engine just do put a T04S on it with 550cc and RC's 1300cc injecotrs to get about 400rwhp out of the enginge
now had a walbro 255lph pump in, that is going to be at is peak whit 400rwhp, so thinking about the walbros new 400lph...
my idea was to run standard fuellines and fpr, as much stock as possible.. or will the pump produce to much pressure so the lines and fpr will be to limiting for the setup??
a friend gets 400hp in engine, out of stock injectors and stock fuellines and a 255lph pump... is the differense so mutch that its nessacary to change anything?
the fuelfilter is upgraded already, since I know that was somewaht limiting already at 350 hp in the enginge with BPU
/niklas
sweden
Last edited by Wolf_; 11-19-11 at 04:48 PM. Reason: just som additions to the text
#2
Sharp Claws
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stock lines and rails are good for about 500 horsepower to the wheels, as far as the pump goes, you get what you pay for and the new walbros are the cheapest and highest output rated pumps on the market currently.
most people run a bosch 044 or a supra tt pump as those 2 are the most reliable.
most people run a bosch 044 or a supra tt pump as those 2 are the most reliable.
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stock lines and rails are good for about 500 horsepower to the wheels, as far as the pump goes, you get what you pay for and the new walbros are the cheapest and highest output rated pumps on the market currently.
most people run a bosch 044 or a supra tt pump as those 2 are the most reliable.
most people run a bosch 044 or a supra tt pump as those 2 are the most reliable.
so stock fuellines and rails are good, how abot stock fuelpressure regulator? will it be able to keep the pressure down with the higher flow?
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You should be good with the new walbro 400 pump, I think there are some other members on here who are now using it. I use the aeromotive 340lph pump that I installed right before the walbro 400 came out or I would have got it. I think you will also need 1680s and 550s for 400 hp, that's what I had with about 400 hp. And I good fuel pump rewire with a relay. I read someone had 700 hp still with the stock hard lines up to the firewall, I have 528 hp and still stock hard lines and stock fuel filter, no problem.
#7
Sharp Claws
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i'd be more curious which will heat up the fuel more. more is usually better when fuel is concerned but to an extent.
does it flow consistently?
do i really need that much volume?
is it reliable?
will it generate alot of heat cycling all that fuel around through smaller diameter piping that wasn't made for the pump?
will i need battery cable wiring for the pump to keep it from blowing out at inoportune times?
does it flow consistently?
do i really need that much volume?
is it reliable?
will it generate alot of heat cycling all that fuel around through smaller diameter piping that wasn't made for the pump?
will i need battery cable wiring for the pump to keep it from blowing out at inoportune times?
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#8
Eats, Sleeps, Dreams Rotary
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A Denso Supra pump will handle 400whp no problem. I am running SaRD 280lph pump which is essentially the same.
With your power goals, why not put a quality piece in there?
http://www.rotaryextreme.com/fdindex.html
With your power goals, why not put a quality piece in there?
http://www.rotaryextreme.com/fdindex.html
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You should be good with the new walbro 400 pump, I think there are some other members on here who are now using it. I use the aeromotive 340lph pump that I installed right before the walbro 400 came out or I would have got it. I think you will also need 1680s and 550s for 400 hp, that's what I had with about 400 hp. And I good fuel pump rewire with a relay. I read someone had 700 hp still with the stock hard lines up to the firewall, I have 528 hp and still stock hard lines and stock fuel filter, no problem.
but will be running 550 and 1300, a buddy of mine here in sweden has 550 and 850 running 400 hp in the engine on that setup with singelturbo... so let's se how far the 1300's will do...
according to Howard Colemans thread about fuel o singelturbos, https://www.rx7club.com/showthread.p...fuel+calculate
I calculated that at 10 ARF and about 85-90% injectionduty it would be good for just over 400 at the wheels...
Wanna se how that translates to the reality =) perhaps stock fuelrails will be somewhat of a bottleneck?
but since the auhoritys in this country wanna check our cars every year for trafficsafty it's even accually illegal to even change the IC and do BPU upgrades... so dont wanna ha all flashing new fuelrails and whatnot to make them even harder.. just hope that d HKS cast manifold and my T04S will be out of sight whit the big airpump in the way!
rewire is done a long time ago for the walbro 255 already so that's no problem, the fuelfilter is changed to aftermarket freeflowing and put in an other place, just so its more easy to get to
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and acording to http://rx7.com/cgi-local/3rdgencalc.cgi
standars injectors on 95% will do 401 hk on the flywheel
and 550 + 1300 injectors at 95% will make about 470 flywheel hp's.. that would be aruond 400 at the wheels right?
theese number are very close to what I've been calculation from Howards thread I linkes in earlier
and I just said 10AFR since Howard calculates on that just to have enough fuel... ofcourse I wont fun with 10 afr.. when calculation its just a safty to always have to much fuel than you need
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Tom94Rx-7,
When you say stock fuel rails will be fine, do you mean running through original supply line, or using supply and retun in parallel (1 supply 1 return or 2 supply 1 return using vent line) ?
When you say stock fuel rails will be fine, do you mean running through original supply line, or using supply and retun in parallel (1 supply 1 return or 2 supply 1 return using vent line) ?
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