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VR V-8 SS

Discussion in 'VR - VS' started by Deuce, Oct 14, 2012.

  1. losh1971

    losh1971 Well-Known Member

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    Hmmmm maybe not a drag car, if that is an aircond compressor I can see??
     
  2. Deuce

    Deuce Super Stock

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    Yeap, races once a year.
    Clutch fan will be swapped for elec fans one day. But going fast cannot be at the expense of cool air, cruise control or a towball.
    The bike is more of a all out racer (that must remain able to be a commuter).
     
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  3. afstruct

    afstruct Well-Known Member

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    Looks great, interested to see .differences and what you think.
    How often do you drag the deuce?
    Do you commute on bike, rain , hail or shine or depends a little on mood and availability of SS.
     
  4. Deuce

    Deuce Super Stock

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    The bike has been my only transport for the last 12weeks. Heavy rain, sub-zero temps doesn't matter.
    I took last season off, but it did 5-7 meetings for the last 6years before that. When I started it was low 13's, but now it is a best of 12.03 @ 108.4mph. It's probably close to 300runs under my belt for the bike now.
     
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  5. Deuce

    Deuce Super Stock

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    Initial results are in.
    Started it up and ran it up to temp. Everything goes fine (throttle was a little sticky so lubed it). Idle was a bit high, but can turn that down or will fix in the tune.
    AFR is rich at idle. So much so it threw code 45 (O2 rich). Something like 11.8 to 12.2 - stupid rich.
    Steady state rev holding 2300rpm is lean.

    I wanted to heat cycle for coolant to self bleed and check for leaks. All was good.
    I will road test one day soon to get bettet data.
     
  6. Deuce

    Deuce Super Stock

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    Road tested on tuesday, and it started off at 8.8:1 afr. I almost looped the block straight home, but then closed loop kicked in and it was up to 13.x:1 so continued on. All went well, tryed half throttle pull and afr was good enough.

    Friday I took the car to work (cold rich idle at 600rpm on cold morning sounded awesome) no worries. Went to the servo after work and it wouldn't restart hot. I had to jump it

    Today I went to my mates to help on his VN wagon. Afr were as I expected given the previous trips, restarted after an hour no problem. And it still holds 10.4v while cranking, so who knows.

    All around I'm happy with it and looking forward to tuning.
     
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  7. Deuce

    Deuce Super Stock

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    New battery day!
    Phoned a few places, and cheapest decent size w/3yr warranty is genuine ac delco from dealership. Stoked!
    Starts better now.
    Tomorrow's drags have been postponed 2weeks. Lucky for me since whenever i go WOT the car flashes a code (21) goes high gear and accelerates all half arse (it's quicker using 1/2 throttle and in a good gear).
    Keeps life interesting. Will work out the prob at some stage.
     
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  8. EYY

    EYY Well-Known Member

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    Guessing it still hasn't been tuned? If not it'll be because of the massive CSA increase in throttle blade size. Airflow vs TPS voltage sorta thing. The main inputs for the auto are tps, vss and rpm i believe.

    I'd still love to know what exactly is involved making adjustments for the auto alone. @immortality, is there a scalar you can change for the 424 pcm, or do you need to adjust upshift/downshift roadspeed threshold to compensate for different sized throttlebodies? Very interested in this.
     
  9. immortality

    immortality Can't live without smoky bacon! Staff Member

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    The only things I really adjust for the Auto are the shift tables (TPS Vs Road speed per gear), Line pressures (more power at a lower TPS will increase transmission slip) and maybe converter lock. For this car I believe we have left the line pressures stock due to the fact the box has been modified internally and goes into 2nd real hard no matter the throttle %age.

    It hasn't been tuned but I did mail him a basic update after some of his observations from the WB O2, basically we have pulled out a fair bit of fuel from idle to about 3000rpm and looking at it it will need more removed yet through the mid range. Haven't fully revved it out yet I think due to the TPS problem. Also reduced the fueling for cranking.
     
    Last edited: Sep 5, 2018
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  10. Deuce

    Deuce Super Stock

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    Yes, everything Immortality said.
    Except on the weekend I put the trans in second and smashed the loud pedal all the way to 5700 while intermittently observing afr's. Seemed ok, still threw a code, but I stayed in it and it went away again. Lol
     
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  11. VS 5.0

    VS 5.0 Well-Known Member

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    So just needed a bigger hammer.
     
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  12. Deuce

    Deuce Super Stock

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    Lol. I think EYY is on to something.
    Besides that, I may have rushed the fitting if the manifold and not put sufficient sealant across the rear valley face, as now there seems a bit much oil around the distributor area.
     
  13. VS 5.0

    VS 5.0 Well-Known Member

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    Bugger.
     
  14. Deuce

    Deuce Super Stock

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    Update:
    In the last month I pulled the dissy, cleaned the back of the manifold and smeared more sealant over the join. Dissy back in and re-timed it.
    Purchased an aldl/obd cable (or whatever they call it) and downloaded tunerpro. Logged car to see what is happening. First move was to adjust throttle stop so IAC steps were reduced to a more normal range.
    Much more to come on this topic of logging. Big thanks for Immortality for the help.

    And today I cut a rectangle out of my exhaust.
    It was offset vertically around the WB O2 port. Plan is to flip it and reweld back in so sensor is above centre and atleast 10° above parallel. As before today it was not.
     
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  15. Deuce

    Deuce Super Stock

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    20181014_171135-1.jpg
    Welded my rectangle back in today.
    I only weld about once every year or two, but did alright (considering my cuts were not perfectly straight).
    I ground it back, then my mate went over it to fill a few pin holes.
    Shot coat of black and good to go.
     
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  16. VS_Pete

    VS_Pete Donating Member

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    Nobody will notice unless they get under the car:p
     
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  17. Deuce

    Deuce Super Stock

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    So true. There is many things i wouldn't try (or would clean up real good afterwards if I did) but this being underneath and not super critical to get perfect, why not aye.
     
  18. Deuce

    Deuce Super Stock

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    So took the car off the road again (from nov 25) and slowly but surely removed the master/booster and dummied up the VZ unit:
    20190101_194043-1.jpg
    Bloody tight fit. But will be happy there.
    Still need to get M10 to M12 adapter for rear brake line, injector plug for brake low switch, bend rear line, make front and rear brackets. But all are mostly sussed and should be good soon.

    In other news, FPR on the rail that came with manifold leaks. But got V6 reg from Immortality 'surplus to requirements' and that fits perfect if you carefully select orientation of return line hose clamp.
     
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  19. VS 5.0

    VS 5.0 Well-Known Member

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    Mmmmm.....rocker porn.
     
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  20. immortality

    immortality Can't live without smoky bacon! Staff Member

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    Ya know the way Holden fitted that AC hose is a real PITA and just looks plain terrible...

    Glad the FPR worked out, good thing you mentioned it when you did, I had started on cleaning up the garage and was throwing out a whole lot of old VN era bits (no doubt I'll need something I threw out one of these days...).
     

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