Jump to content
SAU Community

1st gear lag (stock rb25 turbo)

Kaido_RR

By Kaido_RR,
in Engines & Forced Induction

 Share

Recommended Posts

Kaido_RR Grand Master

Kaido_RR

Posted
Posted

hey,

Just got my fmic install and now are able to run 0.8bar of boost (12PSI) but now if 1st gear i get abit of lag the car doesnt kick in full boost tiill between 3500/4000rpm. The car is a s1 rb25det, my turbo has always been abit of "we arnt to sure what it is"

i know for sure it is BB and does look like the front is stock but possable be a hybird with a vg30 or vg20 rear end.

my mods are; exhuast (stock dump), air filter, fmic, bov, fuel-pump, and ebc

is this normal? i made only 212.7rwhp @ 12psi in shootout mode, there is no boost spiking, many similar modded r33 in perth can make from 220 to 240rwhp

thanks michael

Link to comment
https://www.sau.com.au/forums/topic/64696-1st-gear-lag-stock-rb25-turbo/
Share on other sites
2BNVS Veteran

2BNVS

Posted
Posted

id get another dump pipe and a hi flow cat if u dont already have one, i installed mine and it spooled up alot quicker...apart from that not to sure...

i made 150rwkw with 11psi, full exhaust, air filter so id say a dump would help rid that gas quicker...

ben...

cameron Mentor

cameron

Posted
Posted
hey,

Just got my fmic install and now are able to run 0.8bar of boost (12PSI) but now if 1st gear i get abit of lag the car doesnt kick in full boost tiill between 3500/4000rpm. The car is a s1 rb25det, my turbo has always been abit of "we arnt to sure what it is"

i know for sure it is BB and does look like the front is stock but possable be a hybird with a vg30 or vg20 rear end.

my mods are; exhuast (stock dump), air filter, fmic, bov, fuel-pump, and ebc

is this normal? i made only 212.7rwhp @ 12psi in shootout mode, there is no boost spiking, many similar modded r33 in perth can make from 220 to 240rwhp

thanks michael

What ben said, dumpipe will help with turbo spool up and will give you a power increase that is noticable.

You will have to re-set the boost again as it will be different when the exhaust is flowing properly with out back pressure.

Have you got any picture's of the turbo ?

Don't worrie about the car's in perth they seem to have different results to comapred to the results over the east side.

:)

Jun

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

    • Duncan
      Valve clearance for RB25det series 2

      By Duncan · Posted

      Its also worth mentioning that 30 years after it left the factory and god knows how many missed oil changes since, there is every possibility that one or more lifters are ticking because they are sticky/gummed up. To resolve that you need to pull the cams then pull each lifter, disassemble, clean, reassemble, soak in oil and re-install, and they should come up good as new.
    • MBS206
      R32 GTS (RB20DE) Injectors Replacement

      By MBS206 · Posted

      What air filter are you running? Is it a panel filter in the stock air box, or a pod filter? Is the air filter the type that is oiled?   If you unplug the IACV, what rpm does the engine idle at?
    • joshuaho96
      R32 GTS (RB20DE) Injectors Replacement

      By joshuaho96 · Posted

      Reading through the engine service manual their advice is do a cylinder balance test. Unplug one injector at a time and see if the idle drops a consistent RPM. You can also do this using a Consult cable which is easier. They also call for unplugging the power transistor, then with the engine off and the fuel rail unhooked from the manifold verifying that you have good fuel flow (even injection, no dripping/leaks, etc) when you twist the CAS by hand. Also verify the spark by pulling the spark plugs and allowing the plugs to ground and turning the CAS by hand. I would also start doing the sensor checks and idle valve checks in service manual. Make sure the MAF tests reasonably, the intake air regulator is sane, etc. You may have to get new spark plugs.
    • Dose Pipe Sutututu
      Valve clearance for RB25det series 2

      By Dose Pipe Sutututu · Posted

      This sounds very old of me, however since buying the Tiguan shit box, my view on shit boxes have changed.
    • Waders360
      M35 Brake caliper replacement

      By Waders360 · Posted

      I've looked up the parts number (41011AL501). It's around $700 OEM. Usually our Infiniti G35 here in Canada have interchangeable parts with my Stagea but the parts number are not the same. I have looked around and it seems the JDM 2005 V35 Skyline (which is the same as our G35) has the same caliper but I cannot confirm. And I can't find a repair kit. The inner brake pads drags on the rotor, seems to be rusty piston. Thanks for the info by the way
×
×
  • Create New...