Jump to content
SAU Community

Recommended Posts

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 by Mike_
Link to comment
https://www.sau.com.au/forums/topic/136627-standard-r33-fuel-delivery/
Share on other sites

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?

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. :yes:

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 :yes:

Cheers!

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. :yes:

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.

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.

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)

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) .

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. :nuke:

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. :D

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!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Kinda glad I never got to this ..    https://www.facebook.com/groups/1483859159195077
    • @GTSBoy This method was able to get readings of -10 to -2, so it looks like its monitoring.  Now I need to figure out why the vacuum on the line provided isn't alternating with manifold pressure.  I went with 2 lines that an RB25 tuner recommended but I'll get a longer hose and try directly off the back of the manifold.  He may have been used to OEM intake setups while I have a DBW setup that removed the MAF and IACV.  
    • I work at a car detailing and tinting shop called Quark which gets all manner of German cars in usually (mainly due to a contract with Mercedes Benz Kita Osaka, BMW Nishinomiya and others) but every once in a while something special comes in, like a fully restored 1972 HS30 Nissan Fairlady 240ZG... The shop owner had immediately started applying film to the windows as soon as it was in the shop so the interior was completely covered in towels and plastic sheets. But I could get a few photos of the engine bay which was restored like new. Such an amazing car to see in pristine condition in Japan these days.  
    • Was going to say the car pulls up nicely everywhere, especially going into that last long right hander before the main straight. Looks like a lot of fun.
    • Hey Dave, welcome aboard! Good to see another soon-to-be Stagea owner here. The wagons are awesome — plenty of space, still got that Skyline DNA, and loads of potential if you’re into mods. Definitely post up pics when you get it, everyone here loves seeing new builds. What model/year are you looking at?
×
×
  • Create New...