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Daza33

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Posts posted by Daza33

    White Spots In Fresh Paint

    in Cosmetic, Styling & Respray

    Posted

    Hi guys,

    I resprayed my car over the christmas holidays, been there done it before and so has the old man. Car was thoroughly prepped and sprayed with 3M Jet Black acrylic paint.

    Today I washed the car and noticed white spots all over the car, under the paint. The surface felt rough so I went over it with a clay bar however the white spots remained. I'm just wondering if the paint not curing properly would cause this issue? I should also note that the car has clear coat applied to it as well.

    Just after some ideas before I start wet sanding to see if I can get the spots out.

    Increased Lag After Rebuild

    in Forced Induction Performance

    Posted

    thanks for the offer Ben but it's a s2 r33 motor. After doing some searching on the net after starting this thread I'm pretty confident the cam timing could be my issue.

    Everywhere I've read says retard both cams for top end, but have nothing down low which is pretty well what I have. Gunna suck adjusting it in the car but oh well live and learn

    Increased Lag After Rebuild

    in Forced Induction Performance

    Posted

    I understand that skimming the head and decking the block will increase compression, I was more getting at the fact that with the 8.5:1 pistons it would bring compression back closer to 9:1

    After the rebuild the VCT solenoid crapped out and fried the VCT driver in the powerfc. I fitted a new solenoid and repaired the ecu and can verify it is working because I have disconnected the solenoid and the car drives like a pig.

    Increased Lag After Rebuild

    in Forced Induction Performance

    Posted · Edited by Daza33

    Hi guys. So I rebuilt my rb25 last year after burning out exhaust valves and scoring a couple cylinders and ever since have had a large increase is turbo lag.

    I am running a Hypergear ATR43G3 with a .82 exhaust housing.

    Engine was rebuilt with:

    CP 8.5:1 forged pistons 86.5mm

    Spool forged rods

    Acl bearings

    Crank collar

    All new valves with stiffer springs

    Balanced and block decked + head skimmed

    Cometic MLS Gasket

    Added an adjustable exhaust cam gear but left it set at 0

    Now I know that I have lowered compression but I find it hard to believe that such a small decrease in compression (after accounting for the decking and skimming of head) would result in my lag. I currently reach full boost of 21psi at 5000rpm, whereas before the build I made full boost of 18psi at 4000rpm.

    I inspected the turbo and found no damage, checked wastegate was sealing correctly, checked for vacuum/boost leaks and pre turbo exhaust leaks. The car is tuned with a powerfc, z32 afm and 740cc nismo injectors on 98 making 301rwkw. The only other change I have noticed since the build is that manifold vacuum has dropped from 24inhg to 16-18inhg, leading me to thinking that possibly the exhaust cam is retarded thus causing increased valve overlap, unless the drop in compression would cause such a drop in vaccum (I expect some loss of vaccum). I lined up the cam timing marks and crank timing mark correctly and triple checked they were spot on, however I didn't degree the camshafts.

    Does this sound like a possible cause of this increased lag? Or does anyone have any other theories as to what could be causing such a large increase in response. The turbo comes on hard but as a streeter it is far too slow to spool. I'll also add that I have checked that VCT is operating correctly.

    Thanks in advance

    Atr43G3 Lag Monster After Rebuild

    in Forced Induction Performance

    Posted

    Well 2 months ago I fried my power fc when the Vct solenoid died. Got it repaired and put a new solenoid in, I can see it switching through the hand controller. Guess I'll disconnect it and take for a drive.

    As for the wastegate, I've got close to 5mm of preload on it and have fabbed up a screamer for the internal gate, doesnt creep open it just snaps open and makes a shitload of noise.

    One last thing, if I were to adjust the cam timing is it going to throw out my tune at all?

    Atr43G3 Lag Monster After Rebuild

    in Forced Induction Performance

    Posted

    Hi guys, so I am just after a bit of advice about this problem of mine. Last year I did a forged rebuild on my rb25 after burning out exhaust valves and scoring the bore. Since the rebuild my atr43g3 is 1000rpm laggier than before the build.

    I get 19psi at 5000rpm, whereas I used to get that at 4000 before the build. I am thinking it may have to do with my cam timing since I had the head skimmed and the block decked. I dropped the standard cams back in, lined up the marks but didn't adjust my exhaust cam gear so it is currently set to 0 degrees. The car sits at 18mmhg at idle when it used to be at 22-24mmhg before the build as well.

    Other than the turbo lag the car runs smooth, makes 301rwkw but only sees 220rwkw at 5000rpm, making it a nugget off boost.

    I am thinking of retarding the exhaust 2 degrees tomorrow, but thought I'd get your opinions before I do.

    Apexi Fc

    in RB Series - R31, R32, R33, R34 (1986-2002)

    Posted

    Hey guys just to bump this thread, this arvo was driving home and after getting off boost popped the engine control fuse. After getting home popped my PFC open to find one of the 3 large black chips was burned up. Anyone know if this is repairable, and if so where to take it in the Sydney area?

    Cheers

    R33 Knock Sensors

    in General Maintenance

    Posted

    Hey guys, so just before my motor popped i got a code 34 - knock sensor.

    Since it is getting a forged rebuild I want to replace all my sensors and for the life of me cant find anywhere to get knock sensors from. Just wondering if anyone has any idea where one can find knock sensors.

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