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VF Calais V 6.0 LSD upgrade for drags

Discussion in 'VF Holden Commodore (2013 - 2017)' started by Justin Thomas, Apr 15, 2019.

  1. Justin Thomas

    Justin Thomas New Member

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    Yep i'm very pleased, I really wanted the car to cruise to the beach and run night wars at Meremere (NZ) so the revs changing was a fear factor for me while cruising.

    Just to give a run down.

    1, Factory Calais with 2mm tread factory tyres on 98 basically 14.00 with PM 2.5inch cat back with 2.92 open diff
    2, Changed the diff to 3.27 LSD with 17,000kms on replacement diff and 70,000km on car OTR also installed and Goodyear F1 Directionals (13.45)
    3, Fitted Pacemaker headers and hi-flow cats, tuned to 96 at Pro Tune Automotive, Wayne worked with GM programmers in USA (12.92) Bad weather 20-30kph head winds and wet track in the morning. Almost cancelled it was that rough so expecting a better time next race day.

    I also turned off AFM as was advised by Wayne it was more a sales pitch/up sell than real gain... the drone annoyed the heck out of me, even though the headers made the drone less noticeable, it still annoyed the heck out of me switching on/off more often with 3.27 gearing, this did however highlight that the engine was generally putting in less effort more often as the engine switched to AFM mode twice as much. I'm a qualified technician (ex trade tutor) so i listen to the engine carefully hence i was concerned the gearing change would effect my cruising revs. (I only drag occasionally).

    I can say the 3.27 diff was very noticeable in acceleration and around town. The 2.92 was a very very low rev gearing, I actually felt it was to low.

    Having just been out to check tonight

    50kph Revs are Just over 1000rpm (To be more exact maybe 1050max on flat road)
    100kph Revs are on 1840rpm, I think by memory it was 1600rpm or 1650rpm at 100kph originally (I've seen posts on this exact topic stating others are at 1850 but mine is a rev counter needle thinkness below hence i'll say 1840rpm).

    I took the vehicle away and tried to drive as i always would, some passing and bursts on the throttle but mostly highway driving 100kph and reached 600km to the tank. Having had the car about 6 months i'd never done a full tank economy run before but am happy with 600kms to a tank from a car running the 12sec slips.

    I would do all these mods again in a heartbeat

    If i didn't drag race the car and i had a factory exhaust i'd still do the diff upgrade but maybe leave AFM on if it didn't bother you. I was told by my tuner he can turn it back on if i'm not happy without a dyno run required or fee.

    Note: If viewing the dyno chart ignore the ratio input on the screen, this was to compensate for the gear the trans was run in to do power runs.



    Hope this helps.
     

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    Last edited: Aug 26, 2019
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  2. Milo 6.0

    Milo 6.0 Active Member

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    Thanks Justin,was a good run down and step by step guide.
    Im keen for the drags to start up again on the 4th sept here so I can give my wagon a run and see where its at with the minor mods ive done so far.
    Im also thinking the 2.92 diff gears in mine are bloody useless and a shocking match for the 6 speed auto.
    Did you stall it up on the startline and to what rpm or did you drive off from idle?
    Ive never raced a holden with an ls and don't know how they react,only ever fords so I have no comparison.
    cheers
     
  3. VS 5.0

    VS 5.0 Well-Known Member

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    That is a very good thing.
     
  4. Justin Thomas

    Justin Thomas New Member

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    Yes i load the engine up slightly can't say i look at the revs while watching the lights, maybe 2000rpm or a little over until the brakes struggle to hold. I was also made aware by Wayne at pro tune that pushing traction control button on VF partially turns of traction control. Holding it down for 10 seconds actually shuts it down fully incl esp etc. I run in sport mode with the car shifting itself. A small skid through the water and allow the car to clear the water before stopping... lots of people skid in the water and splash water all under the guards only to then try race on wet tyres.
     
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  5. [paradox]

    [paradox] Active Member

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    are you cammed?
    not wanting to burst your bubble i know its only a number, but a tuned LS3 only just sneaks up to those numbers.
     
  6. Justin Thomas

    Justin Thomas New Member

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    Don't worry mate your not bursting any bubble. I used probably one of the highest regarded Holden tuners NZ. I researched mods that made a difference and it worked. I have the print out of the dyno pulls that surprised the tuner too. I have attached a time slip running high 12s see pictures... I couldn't care if it had half the rwkw it displayed... Track results and goal achieved. Maybe it was the new spark plugs that did it lol.

    Maybe look at the time slips and dyno print out attached. But remember I don't care what the RWKW says anyway. I run a high 12 sec Calais L77 with original cam which those in the know for the record say the cam is fine for lower rpm high torque engines.

    I have whipped two later model VFs now one ute with MTs tyres and one sedan that apparently had intake, exhausts and tunes... that's proof enough for me. Remember you can have more power and go slower if your not getting traction or can't drive.

    Thanks
     
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  7. [paradox]

    [paradox] Active Member

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    at the end of the day thats what matters most.
    real life track times are hands down better than an arbitrary dyno number.
     
    Last edited: Aug 27, 2019
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  8. Justin Thomas

    Justin Thomas New Member

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    Yep, I'm aware dyno figures can be happy... that said the quarter mile time is what I wanted. I would have been happy with a low 13 even so 12s are very rewarding.
     
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  9. Milo 6.0

    Milo 6.0 Active Member

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    Thanks mate
     
  10. abuch47

    abuch47 Active Member

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    I have read on facebook that with the TRC pressed there is still torque management and this is normally turned off by a tuner?

    If i turn this off and go for a teensy skid it will throw a CEL as do others even when they long press it and disable ESP. I fully disabled it the other week with bald tyres in the wet and 2 seconds in it was extremely sketchy.
     
  11. Milo 6.0

    Milo 6.0 Active Member

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    Took my wagon to the drags last night,with hsv headers and cats,stock centre section,rhino mufflers,harrop otr and tune I managed 13.27 at 106.27 mph or 171 kph,was very happy with that,ran a slightly quicker mph at 106.55 but slightly slower time of 13.29.
    Made 317 hp,roughly 235kw atw on a dyno dynamics dyno
    Im off to enquire about some 3.45 diff gears to get the very average 2.1 60 footer down,hopefully dip into the 12s.
    Update-Just saw my tuner and we should be doing diff gears soon:D
     
    Last edited: Sep 5, 2019
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  12. Justin Thomas

    Justin Thomas New Member

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    Interesting read thanks mate. Best i could run this week was 13.30sec and a 13.26 last Friday also with a 2.161 60 ft. My PB 12.92sec was with 2.033 60ft

    Only got 3 runs in no thanks to a mid drag night fireworks display... not what i went for with all due respect to organisers and i think i've been hammering the revs to high on take off causing wheel spin.


    (didn't have 100% of the fuel it was tuned to in the tank)
    Have just purchased 19x9.5 and 285/35 19's for the rear as i've been using 245's on the rear. Having analised my 60ft times if i can drop to 1.90 60ft i'm hoping/thinking there is a 12.50sec quarter in my sights

    Some other cars had run .50 slower than a PB at this meeting so i'm not the only one going backwards this week. I'll update when i get my mid 12 pass hopefully.
     
  13. Milo 6.0

    Milo 6.0 Active Member

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    To pick up half a second Im guessing youll need to get at least 40 more hp at the tyres with the mph you ran.
    Going by project vf that street quick did, each tenth and 1 mph they gained took about 10rwhp to get there.
    I ended up with a 12.990 at just over 107mph with a 2.00 60 foot in the wagon with 3.45 gears.
    My trans is also tuned.
    With the extra weight of the wagon and me being 145kg its a pretty decent effort.
    Mine still has the ve hsv headers with the 2.25 collector and cats,i did fit a twin 2.5 x force catback but with the same tune as before.
    Mine went quicker when I barely stalled it up,ended up only going to about 1250rpm on launch on my best pass with no wheel spin.
    Im looking to get well into the 12 second region as well so im getting a smallish cam and more stall fitted in about 2 weeks,probably be it for the wagon after that,going any further with larger cams and big stalls and the driveability and legality becomes questionable.
    Im hoping to pick up close to 50 hp at the tyres,hopefully.
    Starting to get pricy to go quicker.
     
    Last edited: Nov 10, 2019
  14. Justin Thomas

    Justin Thomas New Member

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    Should have the hp just not getting it down 297Kw, 403rwhp at 5321rpm or 564Nm on the dyno

    PB 12.92sec was a 40kph head wind and the first drive after the tune on factory 245/40 19s road tyres

    Spare wheel and all bits and bobs in the car still

    Surly a better day (wouldn't be hard to beat) Some 285/35 19 new on 9.5 wide rims with a bit more practice can shave .40 from my ET with a bad 60ft

    I read that 60 ft time effect ET heaps... mine are average at best

    Look foward to hearing how the cam goes.. i've been reading Project VF lots, based my mods off them with bang for buck in mind minus running street drag tyres as they went backwards with that on the first test car... keeping in mind the Calais is another car suspension and tyre width etc. I'm technically worse of on my factory tyres. The soft suspension maybe helping after viewing 2 other SS S2 redlines 6.2L at the track with the same mods as me but not as fast, not sure whats up with that. I suspect more power is worse if your not getting it down to the ground on take off.
     
    Last edited: Nov 10, 2019
  15. Milo 6.0

    Milo 6.0 Active Member

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    I wouldn't get hung up on your dyno figure,go by your mph,the time you ran is pretty dead on for the mph.
    If I went off dyno figures alone mine made the same hp tuned with an exhaust and otr as street quicks vf1 ss sedan made bog stock,my wagon shouldn't be any quicker than 13.6-13.7.
    That's why going off mph is a more accurate comparison.
    Ill do an update once the cam is fitted and ive run it again.
     
    Last edited: Nov 10, 2019
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  16. Justin Thomas

    Justin Thomas New Member

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    Fair call!
     
  17. rossimo

    rossimo Member

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    A drag racer I met years ago at wsid told me for every tenth you drop off the 60 foot you will double it off the et. I went back and checked the 12 or so runs I had done in the suby that night and that calc was 100% correct on every one of my slips.
     
  18. Justin Thomas

    Justin Thomas New Member

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    Swapped to some 285 35 19s and had another go.. Goal was sticking in the 12's on every run as went to 13s at recent event

    Very happy with recent runs x3 12.9s and x3 12.8s
     

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  19. Justin Thomas

    Justin Thomas New Member

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    And as was predicted by others and expected the LSD is on her way out.

    Guess I'm looking at the after market diff centers now, but that said it's been well worth it. I've had many drag runs with decent skids including into second gear pre drag runs. Taken a few friends for power runs from stand still.

    Went to the coast yesterday and on some uneven ground the one wheel spin occurred, the LSD barely drove me off the grass, on returning home jacking up one side, the wheels now spin in opersite directions.

    Any suggestions on prefured LSD upgrades??? The factory one lasted about 6mths and 3-4 drag events with 8+ runs at each.
     
  20. lmoengnr

    lmoengnr Well-Known Member

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    Harrop Truetrac centre for the win.
     
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