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daxter

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Posts posted by daxter

    Rb26 Shuffling Turbos, Overfuelling And Map Sensor Imbalance.... Related?

    in Forced Induction Performance

    Posted · Edited by daxter

    Wow wat a read!

    The rear housings must be quite small, and the front wheels quite large to be 'breathing' on idle.

    I had a similar issue on a mates SR20 where it was chuffing on idle and was screwing around with the afm. Was running a very small rear housing and being coupled with a large front comp housing it caused this problem.

    Just some intell on a similar situation, but obviously only single turbo.

    If you fit standard GTR BOVs in the system, it should help, they actually open on idle, so you would think it would give the air thats bouncing around in there somewhere else to go..

    Im really surprised CRD couldnt find a solution to your problem!

    I had a similar problem on my RB25DET, front compressor wheel is too big for the exhaust, why'll my turbo does spool up fast and give strong boost through the rev range, it did surge. (making 220rwkw on automatic, 13psi)

    The problem was fixed by taking off the GFB bov and fitting the stock RB25DET by pass valve. – Letting air bleed out rather than bounce back off the throttle body.

    I've read the stock valves are meant to open on idle and plum back-in in front of the compressor wheel, the circulating air actually helps the turbo spool up faster.

    Cheap Aftermarket Exhaust Manifolds Vs Stock

    in Forced Induction Performance

    Posted

    Thing with those cheap manifolds is some work and some don't, some of them can make the turbo hit the bonnet or make the turbo push up against the rocker cover stopping it from fitting properly.

    However friend has one on his RB20DET and it works fine, so just luck of the draw really.

    Also, stay away from these manifolds -

    73245055_full.jpg

    They give no performance gains and without extra reinforcing they crack very easy.

    Spark Plugs

    in Forced Induction Performance

    Posted · Edited by daxter

    This has probably been answered - if there is no gap number on the part code does that mean there gap is 0.8?

    I'm running 'BKR6E' (no gap number on the box so I assume its 0.8?) wasted-spark coil pacts, 220rwkws 13psi, auto box.

    Compressor Surge

    in Forced Induction Performance

    Posted

    wortho32 - Try reinstalling the stock bov (if its not already on) and leave the bleed hole on the bov open (dont block it off), this should help to relieve enough pressure to stop the turbo from surging on boost. Also if you can, try to re-plumb the bov back in so its circulating the air, this will help keep things smooth and turbo spooling.

    This should work fine till you can get a better turbo then you can slap and aftermarket bov back on.

    Modifying R33 Gtst

    in Forced Induction Performance

    Posted · Edited by daxter

    zonk - I'm making 216rwkw on my auto R33, now limited by injectors.

    Mods:

    FMIC

    walbro fuel pump

    Link G4 ECU

    Full 3"inch exhaust from turbo back

    Hybrid T04 Garrett turbo, internal waste gate (Running at 12psi)

    You don't have to upgrade the turbo for 200+rwkw, but no telling how long it will last.

    Btw you can go full ECU on an auto R33, its recommended you also install a shift kit and larger trans cooler. I haven't bothered with these tho as I'm going to manual mine later.

    I wasted money on an SAFC II only to upgrade to the Link G4 later, I recommend you go straight to a full ECU replacement.

    School Me On Shift Kits

    in Drivetrain and transmission

    Posted · Edited by daxter

    Ok, guess I should take that leap and convert the car to manual, thanks for the reply's.

    One thing I've notice, if I have the power button on the auto seems to put the power to the wheels fine, it's not till the power button is off that it revs high and accelerates slowly.

    School Me On Shift Kits

    in Drivetrain and transmission

    Posted

    Hey Aaron, yeah Ive seen your youtube clip, that's very cool what you have done, looks like alot of fun. (Ive watched it about 3x's now :banana:)

    Would like to use an MV Auto shift kit but I'm in NZ.

    A friend has a full manual conversion kit sitting in his garage which I could get for $2000, if my auto is beyond a quick fix this maybe the best option.

    School Me On Shift Kits

    in Drivetrain and transmission

    Posted

    Hi, would really appreciate if a few questions could be answered.

    My car is R33 GTS25t auto making 216rwkw (ECU is Link G4), now the auto has started rev'ing high and not making the car go any faster, I think this is what you call flaring?

    I've done some searching and read a number of posts about getting a shift kit before this gets worse and something about tightening of the belts?

    What will a shift kit do? Does it tighten up the belts?

    Basically I would like to know what I'm asking the transmission specialist to do, rather than just drive in and say "I want a shift kit" and have no Idea what its going to do.

    Or since I no longer have the factory ECU would I benefit more from converting the car to manual?

    Thanks for reading this small novel I really appreciate any help on this.

    Rb25det Front Facing Plenums

    in Forced Induction Performance

    Posted · Edited by daxter

    Thanks for all the reply's.

    Its interesting to read of people who have modified there stock plenum and swear by it.

    Though I'm sure a genuine built front facing plenum is better.

    Looking at the SR20DET factory front facing plenum, there very similar to a modified RB plenum. Would be good to pull the two apart and match them up to see what there insides are like.

    On another note how much does the length of the runners matter? Factory there quite long, after-mark plenums they look short.

    post-18623-1221684164_thumb.jpg

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    Rb25det Front Facing Plenums

    in Forced Induction Performance

    Posted

    Hi auss13

    That RIPS item looks hot, any idea on the price?

    Ive also found Boosted Performance who does these -

    1.JPG

    $700 Installed (Everything supplied, joiners + hoseclamps etc)

    I see there is a lot of controversy on changing the stock plenum to front facing, but Ive also seen people who have gone ahead and does this anyway with good results.

    I'm sort of leaning towards the Boosted Performance setup tho, drive in drive out, done and good price.

    Rb25det Front Facing Plenums

    in Forced Induction Performance

    Posted

    Hi

    Just wanting to know if there is anything wrong with changing the stock throttle-body on the Rb25DET plenum to front facing?

    My reasons for changing to front facing is too reduce lag and increases throttle response.

    Are there many people here who have done this mod and gained good results?

    Or am I better to spend the money on a genuine side feed unit RIPS, GReedy ect

    (aiming for 240rwkw)

    post-18623-1221604353_thumb.jpg

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    post-18623-1221604375_thumb.jpg

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