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RBChris

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Posts posted by RBChris

    Rb25 Turbo Upgrade, All Dyno Results

    in Forced Induction Performance

    Posted · Edited by RBChris

    R34GTT RB25DET 293.4RWKW

    Garrett GTX3071R .82

    Siemens 630cc Injectors

    HKS Front Mount Intercooler

    HKS SSQV

    HKS Pod Filter

    ACL Bearings

    Z32 AFM

    Walbro Internal Fuel Pump

    Greddy Profec E-01 Boost Controller

    Apexi PowerFC with Hand Controller

    3.5" Turbo Back Kakimoto Exhaust

    3.5" High Flow Metal Cat

    NPC HD 5 Puck Button Clutch

    Nismo Lightened Flywheel

    post-68229-0-96240800-1305541160_thumb.jpg

    Xr6t Auto Vs R34gtt Man

    in Drift & Drag

    Posted

    my mates got an xr6 turbo ute automatic running 250kw atw & slicks, i'm running 260kw atw manual R34GTT. pretty sure I don't stand a chance cause i'm going to have trouble

    getting off the line but maybe you can help.

    i'm thinking I need to change the rear coilovers back to stock suspension cause it's to stiff, & throw some 16 or 17" slicks/semi slicks on but i'm not sure what size or rubber to use, any advice?

    this will all take place legally on the track, i don't think i stand a chance but i'll give it a crack.

    R34 Gtt Diff - Farked

    in Drivetrain and transmission

    Posted

    Hi guys, I have serious trouble getting up driveways and it's been confirmed now that only one week is spinning :P

    what are my options, do I get this one rebuilt, second hand R34GTT, I also heard an S15 diff is the same, what about a R34 GTR rear diff?

    how much better is a 1.5 turn, and is it a worthy upgrade, i don't do any drifting or anything like that?

    thanks for your help

    cheers

    chris

    Help Please, Greddy-e01

    in Forced Induction Performance

    Posted · Edited by RBChris

    thanks mate, that was very helpful. so if my turbo can quite easily hit my desired boost level even @ high rpm it's better to have the gain up for better response and perhaps drope the set level a little for best results?

    also mate, do you know if there's a button on the hand controller to change between low and high boost?

    and also what is the 'peak hold' setting?

    Help Please, Greddy-e01

    in Forced Induction Performance

    Posted · Edited by RBChris

    the greddy ebcs generally have 3 values to adjust. Set, Gain and Set gain. Set is the boost pressure you want to run, as youve mentioned. Gain is how it cycles the solenoid in order to maintain boost and Set gain is at what boost level to begin opperating the solenoid.

    If your Set gain is set too high you will spike BUT if its too low it will be harder to reach your target boost.

    How I normally tune these things is drop the gain down to its minimum value (i think its 10?) and adjust my Set gain to 1 - 2 psi before my target boost. I then dial in the Set to match this and keep turning the Set up until I reach my target boost.

    Boost will probably tail off in the higher RPM so what you need to do then is up the Gain untill it begins to spike, and back it off an increment at a time till it stops spiking. Do it in 4th gear at a high load point that spools fairly quick tho, to get ur spike right.

    If you dont end up holding the boost till redline what you can do is use the warning function to drop your boost when you overboost by 1 or 2 psi and run a higher gain to help keep the boost up in the higher rev range.

    GL, I hope this was helpful.

    thanks mate, that was very helpful. so if my turbo can quite easily hit my desired boost level even @ high rpm it's better to have the gain up for better response and perhaps drope the set level a little for best results?

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