Standard R33 Fuel Delivery

[Mike_]

I searched but couldnt find anything.

At what power output does the standard fuel delivery system of the R33 GTSt S1 max out?

I'm spending a few grand on power in a couple months and it should put me at the 200-210rwkw mark, and the last thing I want is to have something cause the car to lean out at high power and damage something.

So I was thinking of also upgrading the fuel pump and FPR, maybe the injectors. Would it be worth it?

ECU will be piggybacked by an SAFC II (I understand the drawbacks and benefits of these so this is not the topic of discussion) - so what brands of FPR + injector types are too extreme for even the SAFC to adjust to?

Would the standard fuel system be sufficient?

Any help would be nice!

Edited September 29, 2006 by Mike_

[paulr33]

for 200-210 no need

stock injectors, rails, fpr are fine

just get a larger flowing pump

gtr32/33/34 should be fine

nismo should be fine

stay away from walbro

[bj_dove]

for 200-210 no need

stock injectors, rails, fpr are fine

just get a larger flowing pump

gtr32/33/34 should be fine

nismo should be fine

stay away from walbro

What about pushing on further than that?

Ive got an adjustable FPR, SAFC2, bosch 040, going on my r33, and im thinking of getting a highflow turbo, what sort of power can be achieved by raising the rail pressure?

[mickr33]

What about pushing on further than that?

Ive got an adjustable FPR, SAFC2, bosch 040, going on my r33, and im thinking of getting a highflow turbo, what sort of power can be achieved by raising the rail pressure?

Hi bj. If your concerned about the cost of new injectors as i was all you need to do is to

purchase some red top injectors from an S15. I had to buy two set's of four, but the cost

was less than half over new nismo injectors. Try some Silvia web sites. I found mine on

Silvia club of NSW. Ive been told they are good for around 250 ish and thats without a

fuel pressure reg. Hope this helps.

[Mike_]

for 200-210 no need

stock injectors, rails, fpr are fine

just get a larger flowing pump

gtr32/33/34 should be fine

nismo should be fine

stay away from walbro

Thanks for that

I guess my biggest concern is that my fuel pump or FPR might fail on me and I'll start running lean without noticing.

I guess the SAFC would give me this info so I'll just have to keep my eye on it

Cheers!

[Mike_]

Hi bj. If your concerned about the cost of new injectors as i was all you need to do is to

purchase some red top injectors from an S15. I had to buy two set's of four, but the cost

was less than half over new nismo injectors. Try some Silvia web sites. I found mine on

Silvia club of NSW. Ive been told they are good for around 250 ish and thats without a

fuel pressure reg. Hope this helps.

Yeah S15 injectors would be my choice if I go down that path. If you do decide to get them make sure you get the RED ones NOT the purple ones. Some S15's come with one, some with the other, from memory.

[Munna1]

What about pushing on further than that?

Ive got an adjustable FPR, SAFC2, bosch 040, going on my r33, and im thinking of getting a highflow turbo, what sort of power can be achieved by raising the rail pressure?

If you go for a highflow turbo you should get a Power FC, Z32 AFM, and injectors. Your tune will be greatly compromised if you don’t.

[Kennedy]

Standard pump will techinically be good up to 230KW but rarely doesnt (guess coz their age) You can try putting a relay on the fuel pump so it recieves a full 13.98-14 V rather than the 11.8 ir recieves with the stock setup. Make sure you dyno it to make sure it works

210 will be hard to get without rasing boost above/around 12 which inturn raises AFM to above 5V causing R&R

Nismo FPR would be best as boltfit straight in. Other systems usually require adaptors.

I'm runninng Z32 pump, Nismo FPR with stock injectors and put out 200. My AFM peaks at 4.9V so I'm at my limit with 11Psi boost (R33 S1)

[bj_dove]

just to confirm, REDtop sr20 injectors will fit, and they are 480cc/min right?

cheers, bart.

Edited September 29, 2006 by bj_dove

[Spook's_Skyline]

whats wrong with walbro?

i bought a bosch fuel pump only to discover they dont sit right in fuel tanks and swapped it for a walbro

had no dramas

[The Dan]

whats wrong with walbro?

i bought a bosch fuel pump only to discover they dont sit right in fuel tanks and swapped it for a walbro

had no dramas

They do sit right in fuel tanks. I've fit many of these to many different models and you can run the tanks down til after the light comes on before it effects driveability. Download a Walbro flow chart and compare it to the Bosch flow rate. You'll see where your money has gone.

The Walbro pump pumps 250l/hour at 3 bar (Yay, that covers idle) wait til you need 65psi of rail pressure....that soon drops off to 150l/hour. The Bosch pump will pump 235l/hour right up to 5 bar (73.5psi) .

[Spook's_Skyline]

well, mercury motorsports in brisbane told me it wouldnt

ill never be chasing more than 250rwkw

[Cubes]

Thanks for that

I guess my biggest concern is that my fuel pump or FPR might fail on me and I'll start running lean without noticing.

I guess the SAFC would give me this info so I'll just have to keep my eye on it

Cheers!

Which is why with any performance car that is tuned for near max power you should have a power run done every so often to check up on afr's. I know of some that get one done every service.

[Mike_]

Which is why with any performance car that is tuned for near max power you should have a power run done every so often to check up on afr's. I know of some that get one done every service.

Yeah I'd say that's a good idea!

Even so I think I'll end up going the route of a nismo FPR and a GTR pump, but It's going to depend on money in the end.

Cheers for the help guys!