Jump to content
SAU Community

Boost Cut Or Fuel Cut Problem! R33 Gtst Rb25

scottish lad
 Share

Recommended Posts

scottish lad Contributor

scottish lad

Posted
Posted

Hi Guys,

Just had the r33 dynod yesterday and man was she running rich(which i kind of knew). Guy advised me to up the boost so i went out and bought a manual boost controller which i installed.Before i put it in the car was boosting at 7 psi with the restrictor, so i set it up to boost at around 10psi which should be ok however seems to be hitting some sort of fuel cut / boost cut and i just loose all power. Someone mentioned a fuel cut defender today??? no matter what setting i put on the controller it seems to hit 'the cut'. Can anyone explain to me whats happening? and if possible how do i overcome this problem.

Cheers

James

Link to comment
Share on other sites
89CAL Grand Master

89CAL

Posted
Posted

Will not be boost cut, the factory ECU's do not have provisions for this

They have rich and retard, your ECU will be seeing to high air flow (from increased boost) and seeing this as a problem and either putting it in rich and retard or cutting the engine

And if your tuner told you to wind up the boost to fix the problem then I would consider finding another tuner......

To correct this you will need an aftermarket ECU and a tune. If you dont want to do that, wind the boost down to 8psi and drive it standardish

Link to comment
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

Will not be boost cut, the factory ECU's do not have provisions for this

They have rich and retard, your ECU will be seeing to high air flow (from increased boost) and seeing this as a problem and either putting it in rich and retard or cutting the engine

And if your tuner told you to wind up the boost to fix the problem then I would consider finding another tuner......

To correct this you will need an aftermarket ECU and a tune. If you dont want to do that, wind the boost down to 8psi and drive it standardish

So basicly if you want to up the boost on these you NEED to change the ECU. What sort of ECU should i go for? Im not going crazy with the her, just looking to get nearer 260ish bhp.only put out 186bhp and was runing very very rich! was very disappointed and the guy didnt really help much! His advice has got me nowhere¬!!!! :(

Cheers

Link to comment
Share on other sites
paulr33 Grand Master

paulr33

Posted
Posted

i prefer the powerfc, but both would do the job

the nistune setup is probably cheaper

do some reading on both before you do anything

for the powerfc you can read the FAQ in my signature

Link to comment
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

i prefer the powerfc, but both would do the job

the nistune setup is probably cheaper

do some reading on both before you do anything

for the powerfc you can read the FAQ in my signature

Thanks Paul, going to look into it :)

Link to comment
Share on other sites
Mayuri Krab Grand Master

Mayuri Krab

Posted
Posted (edited)

So basically if you want to up the boost on these you NEED to change the ECU. What sort of ECU should i go for? Im not going crazy with the her, just looking to get nearer 260ish bhp.only put out 186bhp and was running very very rich! was very disappointed and the guy didn't really help much! His advice has got me nowhere¬!!!! :(

Cheers

1st, what mods do you have on the car so far? (exhaust?, intake?, inter-cooler?)

If you are not going for massive power & keeping the stock turbo with a 10psi boost setting, and you are short on cash, you can just get a piggy back signal bender like a SAFC (for cheap) & tune that to get rid of the R&R problems.

I've the usual bolt ons with a SAFC 2 & my car made 240rwhp last time on the dyno 1.5 years ago (was also only using R34 SMIC at the time, I have since added a proper FMIC) & I've no R&R problems when I floor it.

My car is also an auto, so there would be more power loss from the transmission compared to a manual.

You will probably get better results from a proper ECU (like the PFC & Nistune mentioned) but from my experience a SAFC is enough to tune out R&R problems on a lightly modified car.

Edited by Mayuri Krab
Link to comment
Share on other sites
Ad's Mentor

Ad's

Posted
Posted

People sell them secondhand on here for cheap. Mate put a SAFC II onto his rb25 and make pretty good power increase, as it's acting like a simple/cheap tune but a aftermarket ecu would be the way to go.

Link to comment
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

People sell them secondhand on here for cheap. Mate put a SAFC II onto his rb25 and make pretty good power increase, as it's acting like a simple/cheap tune but a aftermarket ecu would be the way to go.

The SAFC might be the route for now till i have the money for the ecu route. If its cheap and easy to do then why not??? Ecu can come at a later date. Just want to get her running better/quicker than she is at the moment/

Link to comment
Share on other sites
Mayuri Krab Grand Master

Mayuri Krab

Posted
Posted

Have a look on the for sale section here, SAFCs pops up from time to time when the owner have done more mods & upgraded to a full aftermarket ECU, so they have no use for it anymore. I got mine for about $200ish off someone here 2 years ago.

Link to comment
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

Have a look on the for sale section here, SAFCs pops up from time to time when the owner have done more mods & upgraded to a full aftermarket ECU, so they have no use for it anymore. I got mine for about $200ish off someone here 2 years ago.

Thanks, been looking, all seem to have sold, would i been looking to get the safc 2 rather than the 1?

Link to comment
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

Think SAFC 1 just had knobs to adjust rather then buttons etc but not sure

Going by pictures i think you are right, anyone know for sure the difference between safc 1 and 2. Other than 1 being older and doesnt look as good!

Link to comment
Share on other sites
Mayuri Krab Grand Master

Mayuri Krab

Posted
Posted (edited)

Going by pictures i think you are right, anyone know for sure the difference between safc 1 and 2. Other than 1 being older and doesn't look as good!

Other difference I remember was that the SAFC 1 only has 8 points (on the rpm band) for tuning while the SAFC 2 has 12 points.

There is also the AFC-neo (I think that what it is called, its pretty much a SAFC 3) that you can also look out for, it is the newest one in the product line & has a colour screen (& more tuning points again I think).

As for which one to get, I would just get which ever one shows up for a good price, since they are all just a basic crude tuning device & the difference between each other won't be that noticeable IMO compared to say going to a full aftermarket ECU.

Edited by Mayuri Krab
Link to comment
Share on other sites
nisn Enthusiast

nisn

Posted
Posted

i hav 2 of these SAFC-2 use to run 1 on my sr20det.did make a difference,then i went NISTUNE. ...id prob sell 1. who knows how to set car,on the back of these where it sez. CAR SELECT-

Link to comment
Share on other sites
scottish lad Contributor

scottish lad

Posted
  • Author
Posted

i hav 2 of these SAFC-2 use to run 1 on my sr20det.did make a difference,then i went NISTUNE. ...id prob sell 1. who knows how to set car,on the back of these where it sez. CAR SELECT-

How much you looking for??

Link to comment
Share on other sites

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • PranK
      Theskylineshed.shop

      By PranK · Posted

      Its also very clearly made to take business away from https://theskylineshed.com/ which is legitimate and even has a physical address.
    • PranK
      Theskylineshed.shop

      By PranK · Posted

      The 'About Us' got me ..  I added something to the cart and clicked 'check out' and none of the payment options in the footer (ie those with buyer protection) were available. Stay the hell away from this one.
    • GTSBoy
      R32gtst rear wheel bearing

      By GTSBoy · Posted

      No. Not true for any non-GTR R32. I think even the GTS4 has the GTSt knuckles with eye type lower shock mounts (as opposed to GTR fork lower shock mounts). The only R chassis in which something like the quote claim is true is the R34, on which the turbos have the fork type and the NAs have the eye type. **Edit: Actually I reserve the right to be wrong about the above statement. It might also be true on R33s. My memory on those shitboxen has faded too much.
    • soviet_merlin
      Theskylineshed.shop

      By soviet_merlin · Posted

      It's a scam. It has all the telltale signs: - The "business" doesn't have a physical address or really any kind of information listed - It's using a generic online store website template - The prices are ridiculously reduced. To good to be true cheap - Everything is in stock and can be ordered in any possible combination   I've seen a few of these for other products as well. Things like sunglasses for example. I'd say stay away from it! And maybe reach out to the real theskylineshed and let them know this exists. I doubt there is much they can do about it, but still.   I don't know if they would actually take your money if you ordered something. Or whether it is just for collecting credit card details to scam otherwise. I'm not game or stupid enough to try it.
    • ck_chino
      Theskylineshed.shop

      By ck_chino · Posted

      Hi guys has anyone ever bought from this website theskylineshed.shop?? Not theskylineshed.com as I’m aware there is 2 similar but different sites.     has anyone had any issues with theskylineshed.shop???
×
×
  • Create New...