benl1981

Do the Rb20 actuators have ASN79 written on them? Chris can you send us a pm? Thanks

anyone..sk?

Thanks for the detailed reply! How rich are we talking - did you see any AFR charts when you went back to unigroup. Were the AFRs rich at full load and part load? 11 to 1? Unigroup do come with a lot of recommendations

Well just wanted a bit more informative feedback instead the tune was too rich. They seem to be respected on the silvia forums. But yeah Unigroup do seem to have pretty good feedback

Ok - Is Ricol ok for a "good" tune?

Anyone found a good place to get non-OEM injector o-rings? That are reliable Thanks

bump

Great.

Drifting is holding high loads for sustained periods so they may run less ignition timing or have the AFRs slightly richer than somebody who is only blasting for shorter periods on the street. Not that hard to see. Often times people will see knock on the track that doesn't occur on the street.

Thanks mate but drift is pretty hard on a car compared to street driving. I agree with what you say though - a tune that is good for the track would also be good for drift..

I think I'd be worried about the pressure drop across it at ~220rwkw. I know SK had to run a lot more boost to get 220rwkw. A FMIC was put on and it gave him an extra 30rwkw+ It is a good upgrade but I reckon if you go bigger turbo you should consider a FMIC.

anyone else?

I know that!! I am trying to troubleshoot a particular problem What I suspect is happening is the turbo is delivering too much air and flow reversion is occurring where the engine can't consume all the air. Most of the time at lower loads (in load points 2-6 I can hold the dot in the same box going up a hill - i.e. hold the same load). As the load increases I feel the turbo may be spooling too - as you go up to load point 9 etc in4th gear the AFM voltage is fluctuating a lot! Can anyone answer the questions I posted and check their map trace. I don't think what I described is normal but I never checked it that closely with the stock turbo.

I know exactly what it does and how to use it. My problem is more specific than what is in your sheet.

I've asked this in other threads but haven't had any luck as yet. I have a bit of reversion from a high flow turbo. One of the things I notice on the map trace if you hit it in 2nd (or any gear >1st) and then back off - i.e. rev to about 4 or 5k and then back off the fot doesn't go straight back to the top - there is a slight delay. THen when it hits the top It shoots back down the vertical axis for a second or so even with the throttle closed. Anybody with stock or other turbo - have you noticed this? Also going up a hill in 4th gear hovering around 0-3psi you can see the dot flutcuating between about 3 or 4 load points in the vertical axis with a steady throttle opening. Thanks

thanks mate. How rich are we talking? Like 11 to 1? I hear they tune for drift so maybe that's why it was conservative? How long did they have your car on the dyno? Did you get any knock. How much more power did you gain from unigroup? More response also was it?

Might be using these guys. Friend had a tune done on a silvia there. Anyone else had good reports or otherwise? Cheers

I was looking into this also. It appears the NA one is the same. But couldnt be sure. They are pretty hard to come by even in N/A form. Probably best to get a new one with warranty

Nice to know cubes. Should go well once you tune it up and get the gt30 going! Ive got to put my 450cc S15 injectors in then I'm heading for a tune also. I suspected that the difference between 4.3v and over 4.8v would be pretty huge. I'll be happy with about 230-240rwkw. Hopefully I will get the flow reversion thing sorted.

hope you have better luck with this one Birnie Cubes - are you making around 180rwkw? I see you reckon you get about 4.3v max on the Z32. I'm getting 4.33v max on 10psi high flow whereas on R33 AFM I was at 5.1v Cheers

Ok. Comparing the Z32 to R33 AFM. Maxing out 5115mv on the old AFM at around 5500rpm. Everything unchanged the new AFM reaches 4335mV I have had to adjust the percentage on the AFM trimming a lot though to get inj duty back to near where it was. around 85% in the lower voltages and about 85-90% in the higher voltages. Anyways I'm at ~180rwkw with 4335mV so should be enough resolution to easy get 240rwkw. Can someone please run map trace and rev it hard to about 4-5k rpm in 2nd then back off the throttle quick. Does the dot move to the top then back down even when throttle is fully closed. I'm trying to determine if this is unique to this turbo or not. Thanks

I doubt you'd suck it close with the 3" steel giving it that much more support in the middle.

Nice one Birnie. I hope my z32 doesnt have the max out early prob like yours. Yeah keep us up to date Yeah Paul I realise that. The percentage changes where it grabs the fuel and ign values from the tables. Should be ok for me to drive for a few weeks till I fit injectors and pump. Thought it might run a little rough

Just fitted my Z32 AFM. Selected VG30 AFM on the PFC and the car idles fine and drives fines. What I did notice is that the inj duty cycle at idle was 1.6% where it usually is 1.1-1.2v. I had to add some correction to the AFM table. Dropped the 1.26v down to about 80 or 85% which brought it back a bit. Will just have to keep an eye on the knock and not give it too much till I get the tune. Still have some reversion though which I hope can be tuned out. Birnie - you got your car all sorted yet?

Thanks BH. Did you have surge issues. Apparently the early 500hp ones had surge issues. I'm having issues with my 450hp one but the comp wheel does look a different design. Cheers