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How Many Rwkw Can R34gtt Fuel Pump Handle?

so_tred

By so_tred,
in Engines & Forced Induction

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so_tred Proficient

so_tred

Posted
Posted

I'm getting an AVC-R fitted tomorrow and I just realised that I should probably be taking along a fuel pump..

I'm just wondering how many rwkw's the standard R34 GTT fuel pump can handle?

I know it's been asked before, I searched but couldn't find..

pixel8r Mentor

pixel8r

Posted
Posted

My S2 stagea has ~160awkw which translates roughly to 180rwkw. If I raise the boost even just 1-2psi it hits "boost cut" (R&R, but it cuts the fuel briefly).

I've been told by a workshop that around 180rwkw is approaching the limits of the standard fuel pump. I have standard regulator/injectors. I believe the standard regulator and injectors can go a bit higher, maybe 200rwkw? anyone know for sure?

I'd like to run 14psi through mine and would like to think that a fuel pump is all I need also...so I'm quite interested in this thread...

paulr33 Grand Master

paulr33

Posted
Posted

id say around 200kw + ish is around the max

i wouldnt use it with a larger turbo basically

its probably pretty good & fine for the std turbo

220kw is do-able with std pump - it just depends - i mean it could be on it's knees and only just making it or it could be fine

a dyno plot with afr and fuel pressure will tell you all you need to know

i guess its important to note if it cant keep up and you lean out and you dont notice - rebuild time

eddieeeee-ro Proficient

eddieeeee-ro

Posted
Posted
mate i ran 220rwkw on stock fuel pump and injectors, but no one believes me. so yeh lol

rays dyno is like 20kw out i reckon, i've seen a dyno sheet from an r33 with a hks25/30, stock injectors making 250rwkws on his dyno, i dont believe it haha.

eddieeeee-ro Proficient

eddieeeee-ro

Posted
Posted
Is the bosch 044 a straight drop in on the R34 GTT?? or does it need to be modified??

needs to be strapped to the craddle and needs to be mounted really low inside the tank.

staight drop in pumps are like $400+ from nismo or tomei.

discopotato03 Grand Master

discopotato03

Posted
Posted

From a dollars and cents point of view often the relivant series R32/3/4 GTR pumps can be good .

I'd be asking if R33 or R34 GTR pumps fall in and go that way for a mild upgrade .

Given a choice I would prefer slightly larger injectors over higher fuel rail pressure but it naturally costs more . The flow on benefit (yeh I know) is that at the std fuel rail pressure the pump should be able to keep its volume capacity up a little longer .

The Bosch 044 pump moves a lot of fuel at low pressures and you can at times have fuel temperature issues because so much fuel is doing circuits from the tank and back . Could be a case of too much overkill .

Cheers A .

Munkyb0y Grand Master

Munkyb0y

Posted
Posted (edited)

so if we're talking about a bit over 200rwkw on an r33 (stock turbo), you think the stock fuel pump would be a concern? considering it is working fine, and doesnt seem to struggle on the dyno with afr's, or on the road, ie surging etc.

Edited by Munkyb0y
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

It might not struggle now, but get it checked every 6 months or so on a Dyno IMO.

Plenty have not been upto the task @ 200rwkw when AFR's lean out too easily.

So as long as you keep a tab on it regularly it will be 'ok' if you want to risk the couple of hundred

Swink33 Community Regular

Swink33

Posted
Posted

Just change the stock fuel pump. Its not worth tryin to save a couple hundred bucks when it can result in a lean out and engine rebuild. Also if you choose to do other mods in the future its going to have to be changed anyway. Its not worth being a cheap ass over.

Abo Bob Grand Master

Abo Bob

Posted
Posted

I have run the GTT pump to it's limits.

224rwkw when auto so add a few more kw to compare to manual. I did a track day and I can honestly say that I scraped through. The colour of the exhaust changed markedly as it was running very lean. Somehow I didn't blow it then so I decided to blow it later. (jokes - but I did blow it).

DO NOT TRUST A WALBRO PAST 240RWKW. Have I emphasised this enough? Pay attention.

paulr33 Grand Master

paulr33

Posted
Posted

its important to note the flow rates of the walbro's are rated at 15v

if you install a wallbro in your std skyline it only gets 12v

so you either need to step up to the next model or run direct wiring from the battery

most people dont do this so it could explain why its "performing less than expected"

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