Jump to content
SAU Community

Can You Tell Visually If Your Cas Position Is Wrong?

copycutter

By copycutter,
in Engines & Forced Induction

 Share

Recommended Posts

copycutter Experienced

copycutter

Posted
Posted

Hey guys,

I just fitted an EBC to my GTS-T and noticed that it was pinging like crazy at only around 10psi or so, which seems awfully low for a stock GTS-T. The only other mods really are air filter and cat-back exhaust. The normal GST-T map should be more likly to R&R at that boost and mods I would think. :blink:

However whenever I'm parking or moving real slow I can smell the richness, so it's definitely over rich around idle, but must be way lean when it's loaded up on boost + revs.

After thinking about it a bit I remember when I bought it I noticed the CAS position looks almost fully to the right, like if the nuts were undone and you twisted it almost all the way clockwise. It looked much more "turned" than what I remember the rb25 I had in my 180sx was, which from memory was much more a neutral position. I don't know if this setting is advanced or retarded, I would assume advanced, which I'm thinking could be the cause of this pinging.

My question to you all is, can you tell from visually inspecting a CAS position if it's wrong like that or could it be one of the many other causes IE bad fuel, clogged fuel filter, bad pump etc.

I am planning to get it looked at when I fit a dump pipe, and I've turned the boost back to stock for now, but I just wanted to see if any of you guys agree?

gotRICE? Veteran

gotRICE?

Posted
Posted

Its possible. Mine was pinging like crazy when the weather got warm. It had been SAFC tuned by a no longer trusted tuner, and he advanced it 4 degrees.

So i reset mine and bought a G4. lol

Set it back to the middle def.

copycutter Experienced

copycutter

Posted
  • Author
Posted

Does someone setting it with a timing light require a dyno or just the light itself?

And if I want to just set it closer to where it should be in the middle or just touch nothing until I get someone to look with a timing light?

gotRICE? Veteran

gotRICE?

Posted
Posted

If its as far advanced as you say it is, then retarding it back wont hurt you in any way. It might feel down on power perhaps, or it might even pick up a little.

But using a timing light to get it spot on would be better.

AngryRB Grand Master

AngryRB

Posted
Posted

If its as far advanced as you say it is, then retarding it back wont hurt you in any way. It might feel down on power perhaps, or it might even pick up a little.

But using a timing light to get it spot on would be better.

a while back i set my cas all the way to the right and i was running 11psi with FMIC and exhaust, but with octane booster the car never pinged, or atleast i couldnt hear anything... but around the middle is about right..

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted

do not set it back to the middle and leave it, that'll be worse. turning the cas clockwise retards the timing, anti clockwise advances it. get a timing light and check what the timings like. if its too far advanced and the cas is turned all the way clockwise then pull it out and check if the half moon locator is still on the cam. if it is your cam timing is out

boostn0199 Grand Master

boostn0199

Posted
Posted

do not set it back to the middle and leave it, that'll be worse. turning the cas clockwise retards the timing, anti clockwise advances it. get a timing light and check what the timings like. if its too far advanced and the cas is turned all the way clockwise then pull it out and check if the half moon locator is still on the cam. if it is your cam timing is out

My half moon is still in my cam and CAS and mines advanced the full way for 15 degrees.

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted

yer cool. i said if the timing wasnt right and it was maxxed out for adjustment then either the half moon is gone or the cam timings out. if the timings correct then leave it and turn the boost down

copycutter Experienced

copycutter

Posted
  • Author
Posted

Thanks everyone. I'll get it look at asap with a timing light. Hopefully the belt has been installed correctly and the CAS isn't set like that to compensate for cam gears being teeth out or whatever.

89CAL Grand Master

89CAL

Posted
Posted

I have a question that is kinda related to this. If you have a Power FC and the handcontroller is showing 15 degrees at idle, can you then put a timing light on and set the CAS to be triggering at 15 degrees on the balancer mark.

Probably not the best explanation but was thinking about this today and thought it should work and would make it easier to set base timing. Thoughts?

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      WTB noltec r32 front upper (camber) arms

      By GTSBoy · Posted

      I'm firmly on the "zero compliance is good compliance" for FUCAs. I'd be looking to solid metal joints even if the primary reason for having them is because they facilitate the twist in the arm. I have never been more happy with the way the front suspension behaves than I have since I got rid of the FUCA bushes. Even the thin little (short lived) poly bushes in the Whiteline adjustables have too much compliance for my liking. It probably won't be long before I have sphericals nearly everywhere, probably including both top and bottom arms in the rear, and I'll start complaining about the increased costs for dental work. But I will be enjoying the driving more, I'm sure.
    • GTSBoy
      Brake pad Compound suggestion

      By GTSBoy · Posted

      Plus, you'll get great experience in bedding in pads!
    • Matvei27
      WTB noltec r32 front upper (camber) arms

      By Matvei27 · Posted

      I have offset Nismo brackets so the fact the gktechs can pivot is less important to me. I have 170mm JIC arms with bushings - but they provide no adjustment and I'm not sure whiteline eccentric bushings will fit them (I don't want to ruin the bushings currently in them to find out). Ideally I want something with bushings + adjustment; hence why I'd like to find a pair of these. Unfortunately they aren't easy to find.
    • Murray_Calavera
      Brake pad Compound suggestion

      By Murray_Calavera · Posted

      @Vee37 How much do you really care about finding these pads again? If your pads are quiet, work well and produce minimal dust, really isn't that enough? If you are set on finding the exact pads again, I suppose I'd do something like this -  Visit your local Jax, find out what brand of pads they carry. If the Jax workshop you previously went to had the pads on the shelf, then you can almost guarantee it will be of said brand.   I'm guessing you don't have the receipt for the previous work and pads. Can you visit a Jax workshop and see if they can look up your previous job to see what pads were fitted?  Still no luck? Put your stalker hat on, find the staff that used to work at the Jax store and ask them. Talk to local workshops, try to find out where the mechanics went to. Talk to Jax workshops, maybe they relocated to another workshop. When it comes to mechanics, its a small world. You'd be surprised how easy it is to track someone down. If these ideas don't work, shit will start getting crazy very quickly.... You could find out every brand and model of pad that fits that car... and try them individually ticking each off the list if it wasn't the one you were looking for.... If you go down this path your going to want to learn how to swap pads yourself, it is very easy, takes minimal tools and space. If you have room to park the car you have room to swap the pads. Plus you have the advantage of making sure all the brake hardware goes back in so they won't squeal! 
    • MBS206
      Beers and skylines Fatz style

      By MBS206 · Posted

      You miss spelled bearings...
×
×
  • Create New...