Fuel Pump Requirement For Rb26 600whp

[dreamers]

Hi All,

i was searching the forum for such information but i can't find it .......

currently i have just completed my rebuild of my RB26 engine, spec are below

RaceTech 86.5 mm piston

TOMEI 1.5mm @ 87mm metal head gasket with oil restrictor

Jun Oil Pump

Balance crank, piston, rod, clutch, main pulley

Refresh Standard Head

HKS step 1 IN/EX 264 cam

Jun Cam gear

BC valve spring

Greddy type 6 throttle intake manifold

SARD 720cc injector

HKS type fuel rail

Tomei Fuel regulator

Garrett GT35R AR1.06 split type

aftermarket ex manifold split type

Tial 44mm ex wastegate

Power FC D Jetro

ETC ETC...

i was hoping to make 550whp - 600whp. i am not sure whether i be at that mark or not.

Would I?

The main question i wan to find out is that would a single SARD / HKS 280lph in tank pump would be sufficient for such targeted 550whp - 600whp.

Would i need 2 Walbro 255lph for such WHP?

IF 2 Walbro would i need to run 2 6AN fuel line to the front of my car? or a single 6AN will do?

So sorry for such question which i believe thousand of ppl have asked . i was hoping to keep my budget low but i believe WHP doesn't come cheap so i would need to optimize my $$$$

Cheers

DC

[R31Nismoid]

You will struggle to come close to 600rwhp (440rwkw) on PULP with a GT35.

550rwhp is probably the upper limit there.

If you want a jap pump, a nismo or similar will be fine.

Otherwise a big bosch will also do. Forget wasting time with walbro fuel pumps.

[TiTAN]

one pump fuel you should be able to see you max out the 35R. a Nismo/Tomei replacement pump or a single Bosch 044, thought thats getting to the point where a surge tank isnt a bad idea.

[GTScotT]

From what I know the good jap pumps (nismo, sard etc) run out of puff at the 450rwkw mark. Have seen a couple of setups with that sort of number who could not go further due to their fuel system.

[TiTAN]

one pump fuel you should be able to see you max out the 35R. a Nismo/Tomei replacement pump or a single Bosch 044, thought thats getting to the point where a surge tank isnt a bad idea.

wow i was tired when i posted that.

one pump should be enough to see you max out the 35R. a Nismo/Tomei replacement pump or a single Bosch 044, thought thats getting to the point where a surge tank isnt a bad idea.

[Harey]

From what I know the good jap pumps (nismo, sard etc) run out of puff at the 450rwkw mark. Have seen a couple of setups with that sort of number who could not go further due to their fuel system.

How about the bosch 040 and 044 fuel pumps, when do they normally run out of puff?

[dreamers]

one pump fuel you should be able to see you max out the 35R. a Nismo/Tomei replacement pump or a single Bosch 044, thought thats getting to the point where a surge tank isnt a bad idea.

wanted to put the surge tank but ust afraid that the whole car will smell like fuel.......

[TiTAN]

you can get ones that mount under the car. perhaps PM Risking about one ( http://www.skylinesaustralia.com/forums/Risking-m20349.html )

[MercuryMotorsport]

In an rb25 R33 we made 604rwhp on a GT35R with 1.06AR, but had to use E85 to get it there. That is the highest we have had from a GT35R. The same car makes 535hp on 21psi on pump.

[GUN_METAL_GTR32]

wanted to put the surge tank but ust afraid that the whole car will smell like fuel.......

its not really the surge tank that makes the smell, more the fittings associated with it.

my engine build is going for around 600hp as well and ill be using twin pumps and a surge tank, ill be using all solid steel lines instead of braided to lessen the smell of fuel.

[R31Nismoid]

You can actually buy proper aeromotive line that does not weep the fuel vapor. It's not cheap though.

That way none of the headaches of having to fab up steel for everything.

[Keeper]

nismo and tomei fuel pumps on ebay.com USA for good prices at the moment. thanks to uncle sam being depressed

[Parag0n]

Mount it under the car.

2x Bosch 044's will suit you well and provide more than adequate fuel, use a low psi lifter pump like a Carter Gold and a 2.5lt surge tank will fit.

I have run this system on my car for over 2 years, speedflow fittings all around and braided lines, I never smell fuel however the Bosch 044's do get noisy when the fuel gets hot.

Also beware of ebay and people trying to sell knock-off 044's you want the Genuine Bosch not some chinese copy.

[Parag0n]

In an rb25 R33 we made 604rwhp on a GT35R with 1.06AR, but had to use E85 to get it there. That is the highest we have had from a GT35R. The same car makes 535hp on 21psi on pump.

We are making over 1200rwhp+ with 2x GT35R's on a 20B Triple rotor.

Initial run in tune netted just under 1000rwhp @ only 21psi.

We have pushed the GT35R's to 38psi, figure was good but not giving away any secrets, car is in the 7 second quarter mile club now... only running 28x9 tyres and still untubbed.

This is tuning with the big boys though... M800 with 90% Methanol mix.

Edited October 11, 2010 by Parag0n

[XRATED]

If you don't want to run a surge tank, try a 040 intank then an 044 in series... mount the 044 under the car and use the stock fuel lines. I'd also suggest running the 044 from a speed controller/pwm.

Or use your stock fuel pump to feed an undercar surge tank, and use a single good quality fuel pump such as a weldon a2005-a or 2015-a.

[bigmikespec]

Or use your stock fuel pump to feed an undercar surge tank, and use a single good quality fuel pump such as a weldon a2005-a or 2015-a.

Have you used a Weldon pump; they look awesome!