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Thread: VN Group A Race Car (round 2 of the V8's)

  1. #451
    are hairy Dogsballs's Avatar
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    Isnt it a rear rotor?
    Quote Originally Posted by 50RTD View Post
    Dave, have you uploaded the data from the carby?

  2. #452
    Registered User lightyear's Avatar
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    Quote Originally Posted by Guido View Post
    Fark, no way I would have gone out on those. Surprised you weren't stopped.

    Are you having a crank trigger issue?
    I had to have one shot at getting a decent time. But got fucked over at T1. The issue is there is only one sensor plugged in, the crank angle one.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  3. #453
    Registered User lightyear's Avatar
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    Quote Originally Posted by THE CHIEF View Post
    You forgot to mention the broken wing mount. Can't believe you went out on those rotors and set that sort of time. Couldn't even stay anywhere near you on the out lap on cold slicks. You are a mad man.

    So, are you going to keep this thing for a while longer now that it's shown its potential?
    Yes, that's right. The wing mount on the passenger side collapsed, so was almost sitting on the boot. Wouldn't have helped.
    Not sure why everyone thinks I am an insane driver, I just like going fast. 😀
    I washed the car from top to bottom and inside as well. Used cutting compound to clean any marks off. The thing looks like new. I am impressed with how it's come up. It was last half assed washed in August, didn't even clean it for the run on the weekend,
    I might put it for sale still. But damn it's close now.
    And you did a lot better out of your rotors. This set have done under 2 hours.
    Last edited by lightyear; 03-07-18 at 06:25 AM.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  4. #454
    Registered User lightyear's Avatar
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    Quote Originally Posted by DJ345 View Post
    Lightyear what brake calipers are you running?
    The front are the UPC kit. I think they are VT twin piston. The rotors are a VT or VS HSV size I think. Rears are just stock VN. It actually doesn't need any more brake, if I get some good rotors and alloy hats that will be the end of the brake upgrades. Anyone know where I can get them off the shelf?
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  5. #455
    Registered User lightyear's Avatar
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    Quote-Bob Vegana. I'd be re-thinking that disc arrangement ASAP. Reply- I will look into a rotor and alloy hat.

    Fuck that noise. Reply- It sounds good in real life at full song. The video is played through the shifty laptop and recorded on my phone while pointed at the screen.

    Good job on the time, though. Hope you persist with it. Reply- Cheers, would like to. But sick of spending money.
    Edit- I done fucked up the reply on the quote. Probably makes no sense.
    Last edited by lightyear; 03-07-18 at 06:30 AM.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  6. #456
    Registered User lightyear's Avatar
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    Biggerer crack on this side. Makes you think doing 253km/h down the front straight coming into a corner that this might have ended bad if they snapped in half. Can only laugh about it now because it all went well.

    This is the other half of the same rotor. Wasn't much left before it cracked completely through.
    Last edited by lightyear; 03-07-18 at 06:50 AM.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  7. #457
    Registered User lightyear's Avatar
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    Soooo clean...

    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  8. #458
    Registered User lightyear's Avatar
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    I decided I may as well finish the season with the car before thinking about selling it. Hopefully I can get the car sorted and back out for another test day. The next race is in 5 weeks I think. Now that I know I can be competitive, it makes it more interesting. I will make a new narrow wing and new uprights. Makes more sense to go narrow so I can go as high as allowed. The only way around it is to run a cambered and curved wing. I only have a mould for straight wings. The good thing about running the hard compound endurance tyres means I don't need to fork out $400 for another set just yet.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  9. #459
    Registered User THE CHIEF's Avatar
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    Much like, that's great news.

  10. #460
    Registered User Supashake's Avatar
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    Replace with 2 piece DBA HSV rotors like I did. Have lasted quite well but need careful bed in. I'm moving to Alcon Supercar rotors now but these filled the gap
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  11. #461
    Registered User lightyear's Avatar
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    Where does one buy them? Yours for sale then?
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  12. #462
    Registered User Supashake's Avatar
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    Will be soon. Ebay era.
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  13. #463
    Peoples Champ Fatboy's Avatar
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    You put down a time and that's impressive but you're also a bit fucked in the head mate.

    You could have hurt yourself (your call) but even worse totalled someone else's car or injured (or worse) them. Not cool bro....

    Sell it cheap whilst you're still alive. Preferably to me...
    Bogan taxi owner
    Budget APRA racer

  14. #464
    Registered User lightyear's Avatar
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    I might be crazy, but not entirely stupid. The cracks had only just started when I chose to go out. I didn't expect them to get that much worse in a few laps. But yes, it could have ended badly. The car is for sale at the right price
    But I won't be in any hurry to move it on until the end of the year.
    I will make a new narrow wing in the next week or two so I can get the most height allowed, and the new rotors have been sorted. Well I need to pay for them still. Brake ducting and driver ducting has been ordered.
    Oil change is done with expensive oil. Will drop the diff oil and put new oil in there, then it should be good to go.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  15. #465
    Registered User Tardinator's Avatar
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    Quote Originally Posted by Fatboy View Post
    You put down a time and that's impressive but you're also a bit fucked in the head mate.

    You could have hurt yourself (your call) but even worse totalled someone else's car or injured (or worse) them. Not cool bro....

    Sell it cheap whilst you're still alive. Preferably to me...
    Agreed. Not playing for sheep stations.
    Quote Originally Posted by 1uz-zte View Post
    You're not exactly Mensa material yourself there champ.

  16. #466
    Registered User lightyear's Avatar
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    I now have boxes of parts to put on the car. So looking at doing a few late nights this week. I got a win on the new rotors
    $465 for the pair, can't complain about that... The rep decided the rotors did fail unnecessarily early, so I got a special deal on an upgrade to new 2 piece ones.
    All the mods I am doing this week coming are not to increase speed, more so just make the car better and the driver more comfortable.
    I am looking forward to the next race meeting, main goal is to finish every race... in first place.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  17. #467
    Registered User Supashake's Avatar
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    Run the 2 piece DBA rotors in very carefully, Bed them like true race rotors and they will crack, Need a few mild heat cycles.
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  18. #468
    Registered User lightyear's Avatar
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    Thanks for the tip. I think that's how the last ones broke, I might have heated them too quick, even though I started fairly slow for the first few stops.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  19. #469
    Registered User lightyear's Avatar
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    Race weekend notes-
    I ended up in a mad rush to get the car ready, literally threw everything in the wagon I could think of that I might need for the weekend. Tools thrown in boxes, crap everywhere. Pretty disorganised, you always think that there is enough time...
    The weather forecast was pretty bad, and the weather was indeed very bad. But somehow we managed to not need wets even once. Well some guys went out on wets, not a good call as the track was mostly dry.
    Anyway, here is how it played out-
    No practice, straight into qualifying with brakes that need bedding in. We had been allocated 20 minutes so I did a couple of laps to bed in the brakes and cool them down, before getting some heat into the tyres and coming in to pit lane to do tyre pressures. Then as I was going out to set a quick qualifying time, the session was red flagged. So qualified 9th or 10th.

    Race 1 start was good, got to 3rd or 4th before doing a compression lock up in T4 battling Vic under brakes and going back a few places, then the race was red flagged. I figured that i was lucky, and the place I got at the start line would be where I finished. But the race was cancelled, so no times or places for anyone.
    Race 2 I had to start in the original qualifying position of 10th or whatever it was, had a good run and finished in 3rd place. But got a 38 second penalty for passing on the formation lap. That put me in 10th place. We only did 5 laps. (The reason I passed on the formation lap was my car wouldn't start, so a few guys went passed me, and I thought I would go back to my position)
    Race 3 I started 10th, again.. A massive rain and hail system had just cleared, and the track was very cold, but mostly dry. I tried to take off with very little revs to not get wheel spin and I stalled it. I restarted it just before the E30's took off. I was by myself miles behind any of the other VicV8 guys. I thought to myself, I can still get 3rd place from here. Not realising we only would get 5 laps. I started catching cars, and one by one I found my way around them. And what do you know, finished in 3rd place. It was the most fun I had all weekend. And I won a trophy for the best drive of the weekend.
    Race 4 was the last race of the weekend. Now I had an actual shot at dicing with the 2 fastest cars running. Len in a ~1969 Mustang fastback, very nice car with plenty of dollars spent on it. And Brian with a big dollar VS Commodore, also the round sponsor. And to make it even more interesting, Mark loaned me a pair of wide sticky wheels and tyres to throw on the back to hopefully help with my oversteer. Thanks Mark.. (Pity we didn't get to race each other with your mechanical issues)
    I got way too much wheel spin off the line, probably playing on my mind after stalling it last time. A few guys got up beside me, but I soon got some speed up, and within a lap it was the 3 of us well ahead of the rest of the pack. An actual close race for the podium positions. I found my way to second place, with 3rd right in my tail, then got black flagged just as I was building up speed and confidence. Finally get some real competitive racing, and it turns to shit...
    I slowed down went around and came in. The marshal is just looking at me, I wait while he slowly comes closer. Nothing.. So I open the door and ask what the problem is, he says I need to put the window net up. I ask if I can go back out, he says calmly that I can. Not sure if he realises I was in a race. Pretty much finished last from 2nd place because i forgot to put up my window net.
    So what should have been a great result, ended up being very average. I got the second or 3rd fastest lap time in every race. So it's just a matter of not being so dumb. The car was great and had no issues all day. Well, we did take out the Project Mu pads, and put the cheap set back in to reduce front brake bias. And I lost the front splitter after pulling out of someone's slip stream just before turn one. At about 260km/h.
    Last edited by lightyear; 20-08-18 at 11:20 PM.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  20. #470
    Registered User BLO 767's Avatar
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    Nice one.

    Did you find the PMU's had that much bite? Interesting!

  21. #471
    Registered User Stevil's Avatar
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    thats for the update Lightyear, sounds like if you'd had a bit more prep time and pre race calmness then multiple podiums would have been on the cards.

    Any footage ??

  22. #472
    Registered User lightyear's Avatar
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    The problem with the brakes is we went from a pedal that was too soft, to a pedal that is rock hard. The fronts would just keep locking without much effort, even with the rear bias on full. The front master cylinder is going to be reduced to allow some pedal movement and allowing me more modulation and feel. The quick fix was to go back to a less aggressive pad. If I get some more rear brake bias and maybe the same Pmu pads in the rear it might stop well. I said in my race review that I locked the rear brakes. But they don't lock. What I did was release the clutch with not enough revs and did a compression lock up. I should edit that.
    For some reason there is no footage. Not sure what went wrong. But all the other guys have footage. There is good one on Facebook. One of the guys uploaded a video from his rear camera. He started out in 14th I think. He goes flying past me as I am not moving, and you can see my car as a little white dot by the time he gets to turn 1. Then you see me gaining and by turn 4 I am right on him. Passing 4-5 cars to catch him. Pity I didn't get any footage of that race.
    My other big issue is the shifter doesn't self centre, so I spend a lot of time trying to find gears. I need some commodore guys to give advice. Adam said its most likely a spring in the shifter mechanism.
    Last edited by lightyear; 20-08-18 at 11:18 PM.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  23. #473
    Registered User Supashake's Avatar
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    Reducing the front will lock even more, Reduce the rear.
    GURU ENGINEERING PTY LTD

  24. #474
    Registered User lightyear's Avatar
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    Here is a screen grab showing my splitter mod.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

  25. #475
    Registered User vlsv88's Avatar
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    To get the shifter to spring back to centre just replace the springs with firmer ones. The ones they sell at Bunnings are only a couple of dollars and do the job well. Just bring yours in to match the size as theres a few

  26. #476
    Registered User lightyear's Avatar
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    Nick had a good look at it and stuffed around with it for a while. But it's still not good. I left it at his shop while I was overseas so it could be prepped and repaired if it needed any work for the next round. I got back the Monday before Winton, but made the decision not to go. My Cams license had expired while I was O/S and I needed to book in and get a medical this time. With the jet lag and time running out it to organise myself I figured I will wait for the next round. But even that is going to be tight. If it was Phillip Island I would make more of an effort. Winton is so far, dry and doesn't suit my car as well.
    NA8B 89KW- P.I. 1:50.1, WNTN1:38.0, SDWN 1:27.6, WKFLD 1:10.4
    NB8B 181KW- P.I 1:43.8, WNTN 1:32.9, SDWN 1:22.0, BDFD 1:05.3
    VP 293KW- P.I 1:43.8 WNTN 1:33.5

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