Jump to content
SAU Community

The letterbox magnet has a new life!

ix9

By ix9,
in Western Australia

 Share

Recommended Posts

ix9 Grand Master

ix9

Posted
Posted

Just thought I'd share my experience with 1.2bar on my HKS GT2535.... I couldn't run much boost before, ie 10psi max without it misfiring.

After replacing the coils with some better ones, I can now take it to 16psi easily. So much more power, and now it really makes me appreciate the HKS quality and response of this turbo. Absolutely remarkable. It went harder on just 10psi before, but now it's completely changed the way I feel about my car.

Anyway - in summary HKS GT2535 + Stainless Split Dump + New coils = Perfect match for the RB25 :D

Link to comment
https://www.sau.com.au/forums/topic/65757-the-letterbox-magnet-has-a-new-life/
Share on other sites
SeriesIIGTST Mentor

SeriesIIGTST

Posted
Posted

Kym,

You still on your stock injectors? If so, be careful cause with that much boost, you're injectors are going to be maxxing out big time if you're on stockies. I don't run any more than a bar into my 2535 and that gets me dangerously close to 100% injector duty according to my PFC.

Glad you're enjoying it though, told you it was worth the $$ :)

ix9 Grand Master

ix9

Posted
  • Author
Posted

Jas,

You'll get your stock cat back soon, f*cken pits failed me for a second time! *GRRR*

Dave,

Whoops didn't know about that - might keep it around 1bar then if that's so, either way it's yet to be tuned at CMP soon so that'll tell me what's going on :) and Yep, NOW i can enjoy this turbo to it's fullest potential :)

Brendan,

Standard S2 coils, ie, mine were well shagged out :P

Jason,

I'll post some up soon for ya

rob77 Veteran

rob77

Posted
Posted
Kym,

You still on your stock injectors? If so, be careful cause with that much boost, you're injectors are going to be maxxing out big time if you're on stockies. I don't run any more than a bar into my 2535 and that gets me dangerously close to 100% injector duty according to my PFC.  

Glad you're enjoying it though, told you it was worth the $$ :)

Didnt SST pull much more HP out of the stock injectors in tristans motor because it has a wolf ecu??? I dont drive my skyline much anymore, its for sale, but i dont go much above 12psi and believe there still plenty of fuel in it (on the hyperdrive dyno the afc's were all good even at 1bar) *shrug* If i had another $5k, i'd do some head work, exhaust manifold, set of cams to try and bring boost on earlier and some bigger squirters too. Personally I have to say the td06 has to be another worthy turbo for the rb25det, mine has the largest exhaust housing but i reckon with a slightly smaller one, a decent exhaust manifold it'd be up there for response and top end power too. Pauls GT30 was pretty nice too.

SeriesIIGTST Mentor

SeriesIIGTST

Posted
Posted

Rob,

I dunno about anyone elses car or how anyone else tunes. All I can tell you that with mine, although my AFR remained perfect at 12:1 at 1 bar, my injector duty was like 98% according to my PFC. That to me reads that I shouldn't be pushing it any harder than that boost wise for risk of my injectors maxing out, my AFR leaning back out and my car detonating.

I hold no opinions in the way SST vs any other people tune, I don't know anything about Tristans car, I don't know anything about the Wolf vs the PFC cause i've only used the latter, I don't know anything about Kym's car or your car. My original comment is based purely on MY experiences with MY car.

I'll close by saying that given another $2K to spend on car (and i'm buying a house so i don't have that money at the moment), it'd go straight to injectors and another PFC tune @~1.4-1.6 bar and be the happiest camper around town.

Cheers!

SeriesIIGTST Mentor

SeriesIIGTST

Posted
Posted

:bs!:

Pull your head out. For all intents and purposes, all us RB25 boys(and girls) have roughly the same setup, with the only notable difference being our engine management and turbo. Those that are capable of reaching said horsepower usually all have CAI, regulator, bigger pump, bigger turbo, cooler, zorst, boost, ECU and cam gears give or take. Those that SAFELY make that horsepower, would ALL have bigger injectors, end of story. Sure, I'm not saying that he couldn't get there, son of rajab knows I could have got my tuner to just wind 1.6 bar into my turbo, cranked the rail pressure right up and nudged my power figure toward the quoted 400 you speak about but how long would that last? one run? two runs? one month?

I'm not having a pissing competition with anyone. All I know is that after shelling out thousands in an engine rebuild once due to ignorance, I don't want to be having another any time soon and therefore, my warning to Kym stands as far as i'm concerned. No i'm not a mechanic and i'm sure there are lots of workshops that have traded successfully for a lot of years and all that BS that we've all heard before.

Kym, if you're entering a pissing contest, ignore my warning and let them screw as much horsepower as they can possibly get out of your stock injectors. Bear in mind that spray patterns are effected once you crank rail pressure up. End of the day, it's your car and your money. Best of luck mate and I honestly mean that. For me, I'm happy to putt around on 12-14psi until I upgrade my injectors but that's just me.

/end rant

ix9 Grand Master

ix9

Posted
  • Author
Posted

Dave,

Definitely not a pissing contest on my part, I don't give two hoots about peak power output or screwing as much horsepower as possible, Steve knows this too. I'm after clean usable response over the stock variants.

As for SAFE horsepower and recommendations, I'll leave that to my tuner's experience based on my CURRENT level of modifications.

Thanks for the advice as we pretty much have the same setup in terms of bolt-ons :D

miss_petepie Grand Master

miss_petepie

Posted
Posted
You'll get your stock cat back soon, f*cken pits failed me for a second time! *GRRR*

and this Kym is why u get a chick to take the car over.... so much easier ;)

have gotten heaps of mates cars over and never a word.. apart from Mikes sil... that had issues :(

good to see ur car is working better ;)

-pie

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

    • brillo
      Leak from Tokico BM50 Brake Master Cylinder

      By brillo · Posted

      Hi, SteveL Thank you very much for your reply, you seem to be the only person on the net who has come up with a definitive answer for which I am grateful. The "Leak" was more by way of wet bubbles when the pedal was depressed hard by a buddy while trying to gey a decent pedal when bleeding the system having fitted the rebuilt BM50 back in the car, which now makes perfect sense. A bit of a shame having just rebuilt my BM50, I did not touch the proportioning valve side of things, the BM50 was leaking from the primary piston seal and fluid was running down the the Brake booster hence the need to rebuild, I had never noticed any fluid leaking from that hole previously it only started when I refitted it to the car. The brake lines in the photo are "Kunifer" which is a Copper/Nickel alloy brake pipe, but are only the ones I use to bench bleed Master cylinders, they are perfectly legal to use on vehicles here in the UK, however the lines on the car are PVF coated steel. Thanks again for clearing this up for me, a purchase of a new BMC appears to be on the cards, I have been looking at various options in case my BM50 was not repairable and have looked at the HFM BM57 which I understand is manufactured in Australia.  
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      PXL_20250828_063541093.TS.mp4
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      Well the install is officially done. Filled with fluid and bled it today, but didn't get a chance to take it on a test drive. I'll throw some final pics of the lines and whatnot but you can definitely install a DMAX rack in an R33 with pretty minor mods. I think the only other thing I had to do that isn't documented here is grind a bit of the larger banjo fitting to get it to clear since the banjos are grouped much tighter on the DMAX rack. Also the dust boots from a R33 do not fit either fyi, so if you end up doing this install for whatever reason you'll need to grab those too. One caveat with buying the S15 dust boots however is that the clamps are too small to fit on the R33 inner tie rod since they're much thicker so keep the old clamps around. The boots also twist a bit when adjusting toe but it's not a big deal. No issues or leaks so far, steering feels good and it looks like there's a bit more lock now than I had before. Getting an alignment on Saturday so I'll see how it feels then but seems like it'll be good to go       
    • PranK
      R35 GT-R production ends after 18 years

      By PranK · Posted

    • SteveL
      Leak from Tokico BM50 Brake Master Cylinder

      By SteveL · Posted

      I don't get in here much anymore but I can help you with this.   The hole is a vent (air relief) for the brake proportioning valve, which is built into the master cylinder.    The bad news is that if brake fluid is leaking from that hole then it's getting past the proportioning valve seals.   The really bad news is that no spare parts are available for the proportioning valve either from Nissan or after market.     It's a bit of a PITA getting the proportioning valve out of the master cylinder body anyway but, fortunately, leaks from that area are rare in my experience. BTW, if those are copper (as such) brake lines you should get rid of them.    Bundy (steel) tube is a far better choice (and legal  in Australia - if that's where you are).
×
×
  • Create New...