Jump to content
SAU Community

Recommended Posts

Sorry to re-ask a question that has doubtless been asked before (Search turned up nothing, however) but:

If, for example I set the cam gears to +4 degrees inelt & -2 degrees exhaust does this mean the timing needs to go to 16 degrees BTDC on the crank.

Can anyone with these adjustable gears on a stock RB26 (+ pods + exhaust + 1 bar boost) confirm these number to be about right?

I had this all figured out once, but old age & infirmary makes me forget. :kiss:

Link to comment
https://www.sau.com.au/forums/topic/156588-rb26-cam-gears/
Share on other sites

from memory my inlet is advanced maybe 6 and exhaust retarded about 4. gave a nice lumpy idle, and heaps more power everywhere. I don't think you need to do anything to correct the timing. you just adjust the cam timing at the gear and leave everything else alone. it's been nearly 2 years since mine were done though, so if somone else has a better memory than me, listen to them!

Link to comment
https://www.sau.com.au/forums/topic/156588-rb26-cam-gears/#findComment-2910263
Share on other sites

yeah sorry, since you remove the cas to do it I assumed you will re-set it when re-fitted. but you still want the ign timing to be 20 base, so that doesn't change. unless someone can tell me I'm wrong! 2 years is a long time for my poor memory!

Link to comment
https://www.sau.com.au/forums/topic/156588-rb26-cam-gears/#findComment-2910907
Share on other sites

Yeah you need to reset the timing after you change the ex cam position, even if you put the cas back in the exact same spot it will be wrong because you have shifted the cam. Set at 20 base.

Thanks Femno & Baron. Put the things in on the weekend. Adjusted the CAS so the timing light was indicating the same as the PFC handset.

Results? Well nothing much discernable from the data logger. Problem being that turbo motors are greatly influend by ambient air temps & I can't log these. Subjectively it felt much better through 4000rpm and seemed to spool up a little quicker. So I am happy with the results.

Link to comment
https://www.sau.com.au/forums/topic/156588-rb26-cam-gears/#findComment-2915894
Share on other sites

ok, found the graph. I overstated a bit. it was 26kw gain. and absolutely nothing else touched except for the cam gears. the ebc settings, and power FC settings were left alone. at one point there was even more top end, but not as fat in the midrange. i preffered more in the mid range so I stayed with the result you see below.

dyno_graph_-_247vs221p.JPG

Link to comment
https://www.sau.com.au/forums/topic/156588-rb26-cam-gears/#findComment-2915986
Share on other sites

yeah it was a good result. that was 2 years ago, car is a bit different now and with about 20rwkw more. my idle was definately affected. but I love it. sounds much tougher now. :D poor mans cam change I tells ya.

Link to comment
https://www.sau.com.au/forums/topic/156588-rb26-cam-gears/#findComment-2916025
Share on other sites

  • 10 months later...

Timing wont change as the inert part of the gera stays in the same position in relation to the crank.. only the outer advances or retards.

Beware too as i have used a few of the cheap ones lately and found them to be timed way out IE 0degrees is actually closer to 8 (cant remmember if it was adv or ret) so if you getting cheapies then check the cam timing first.

I first found it on AROSPEED Sr20 gears where they needed to be advanced about 9-10 just to get lost power back.....

Link to comment
https://www.sau.com.au/forums/topic/156588-rb26-cam-gears/#findComment-3570370
Share on other sites

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


  • Similar Content

  • Latest Posts

    • This. A 3d wheel alignment is like $120...just take it to the shop. Since theres probably multiple adjustments that need to be made after changing something. Mine has front/rear lower arms, traction rods, tension rods, camber arms, toe arms, front upper arms, hicas kit, sway bars and coilovers. I measure from the edge of the bolt holes on the originals and set the same length on all the adjustable stuff to dial it as close as I could to OEM. Took it straight for alignment; it didnt feel right at all...after alignment, it feels perfect. Similarly i've just changed the springs on another car; and I still needed multiple adjustments to bring it back in spec.
    • A full Veilside kitted JZA80 Supra in Meriken park in Kobe city a few weeks back
    • Its a well known brand in New Zealand; its a rebrand of the Rhino RAV3.  I don't know what the wiring difference *is* between the rev.1 (installed about 15 years ago) and rev.2; but as you say I would think its reasonable that it uses the same immobiliser relay circuits. I had a look but couldnt see a similar harness; but didnt move things around since I didnt want to mess with it   It was one of AVS well known Authorised Installers; I spoke to AVS themselves about it but theyre unsure hence seeking advice more so from the skyline community who are more familiar with the actual car and its wiring. Im in Auckland; but the installer is on the other side of the city so hes very reluctant to come back to even look at it to confirm something isnt connected into the wrong wire.  I dont want to drop the name since they *did* do a really good job for the most part. Everything is very tidy and he fully replaced all the alarm wiring, all the sensors, the wiring to the door motors, installed a switch which was never installed in the first place...really happy with the alarm install itself..just not this one issue. We all make mistakes, if it is the alarm, I just want my fuel pump getting proper switched, fused, power as it was; without having to shell out for an auto electrician to switch a wire and tell me it was the alarm. 
    • Even with the piston at TDC there was room for it to drop, but I don't think it can drop fully into the cylinder, the problem you have is that you need something pushing against the valve to hold it up so you have enough room to put the new stem seal on and the spring etc.  I used compressed air only because putting rope in the cylinder seemed a bit risky to me, I know people have done it countless times before like this. Overall it's a pain in the ass job. Honestly you'd probably be better off taking the head off because the risk of dropping something in the engine and the finicky-ness of it all is very stressful. If you are going to attempt it though i 10000% recommend a 36050 valve spring/keeper tool. I had both the traditional lever type and after doing 1 cylinder it was absolute pain to get those valve keepers in place, even with 2 people. That 36050 is amazing, you do have to push hard to get them in place but it works perfectly almost every time. Back to my actual issue I think my engine is just tired and old and the rings have gone bad. The comp numbers (cold, no oil) were: Cyl 1 -129psi Cyl 2 - 133psi Cyl 3 - 138psi Cyl 4 - 137psi Cyl 5 - 157psi Cyl 6 - 142psi   Cylinder 5 and 6 having the most carbon on them.
    • Who did you have do the installation? I actually know someone who is VERY familiar with the AVS gear. The main point of contact though would be your installer.   Where are you based in NZ?
×
×
  • Create New...