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Thread: The PRHT track car slow build by The Lightyear

  1. #31
    Registered User lightyear's Avatar
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    I got the car back, but haven't had a chance to go on a drive to test it somewhere other than driving to the shops. It doesn't feel much different so far. The clutch engaged very low, so might see if I can get that just a tad higher.
    The thing is very heavy. 250kgs more than my NB8B, ouch... The retractable roof is probably 100kg's.

    It's almost finished. I will get some proper wheels and tyres for track use, maybe get it tuned on a dyno so I am getting the most of all the mods. And I wouldn't mind changing the colour still. But it's pretty much where I want it. And a front and rear lip spoiler could end up on the car.
    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

  2. #32
    are hairy Dogsballs's Avatar
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    I like the colour.

    250 kg of comfort!!

    Sent from my Nexus 6 using Tapatalk
    Quote Originally Posted by 50RTD View Post
    Dave, have you uploaded the data from the carby?

  3. #33
    GTFO of my ED doctor ed's Avatar
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    Quote Originally Posted by lightyear View Post
    Well I got pretty lucky, he was able to squeeze me in straight away. And after a quick chat we decided that it may as well get the full track set up. So he is corner weighting it and doing the wheel alignment and camber, castor, etc. It should be a different car to drive. Now I need to save up for some wheels and tyres for the track. Sadly, something decent will cost around $3k.
    happy to contribute in exchange for a wing
    Mit freundlichen GrŁŖe

    Quote Originally Posted by Keith Duckworth View Post
    "I think that in a racing engine, the closer it is to disintegrating, in general the better its performance will be "

  4. #34
    Registered User lightyear's Avatar
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    I have a few wings that I need to make. But first I am working on my work space. Everything is getting moved so the spray foam guys can come in. It's going to be comfortable once it's fully insulated. Hopefully I will have the garage, workshop and storage areas sorted in 2 weeks. This weekend I am building a room at Phillip island just to mix things up. People ask me what I do for a job, it's a hard one to answer since it changes every day. A busy house husband?
    Last edited by lightyear; 31-10-18 at 04:52 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

  5. #35
    Registered User lightyear's Avatar
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    I spent the weekend down at sunny Phillip Island. The MX5 felt so much like driving a stock car compared to the black MX5. It has lots of body roll, lots of weight transfer and fairly quite. The A050's felt OK, but then started delaminating. It was doing 1:54's with an optimal time of 1:53.6, pretty much what I expected to do. I bolted on the road tyres seeing as the R specs where a bit dangerous to drive on and took it out the next day. The road tyres turned the car into the most undriveable death Killy car I have ever driven. The side wall must have zero stiffness, so it just wants to throw you off the track, even going straight. I will upload a video. The car was 6 seconds slower, and scary as shit to drive. Steering inputs had to be so light as to not upset the wobble too much that sends the car into an immediate slide. I had one huge slide coming onto the straight and facing the inside wall, that was a proper oh shit moment. All caught on camera from inside, and the guy behind who said he will send me his video.
    It will do a 1:52 with good pads and tyres, but it really needs more power so there is some sense of acceleration when coming out of corners. Might end up with an off the shelf supercharger. Around 10psi would be enough.
    Last edited by lightyear; 19-11-18 at 05:46 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. #36
    Registered User lightyear's Avatar
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    It lost a little grip, but was nothing compared to the road tyres.
    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. #37
    Registered User lightyear's Avatar
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    I forgot to upload any video. This is what the car was like on every corner with the road tyres.
    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. #38
    Registered User lightyear's Avatar
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    I advertised the car as is, but no takers. So it's being converted back to stock. Well the easy to remove bits anyway. So far the intake, full exhaust and coilovers are off. Things like the clutch, flywheel and diff gears are staying. It was a pretty cheap buy considering it really wasn't more than a stock NC asking price. It should make a few grand more doing it this way, but there are a few hours in it.
    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. #39
    Registered User lightyear's Avatar
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    Seeing as I had nobody interested in this car, I decided I may as well put the coilovers back in along with the seat and harness. The car no longer has the full aftermarket exhaust and aftermarket intake, but it does have some 235 wide Nankang's and a set of 9" wide Enkei's now. Should be good for a 1:52 I hope. That's if the intake and exhaust don't kill the performance.

    Last edited by lightyear; 17-06-19 at 04:19 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

  10. #40
    Registered User THE CHIEF's Avatar
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    So you driving this on Sunday? See you there, I just got some new nankangs too. Hoping to sail the boat in to the high 40's

  11. #41
    Registered User lightyear's Avatar
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    The plan is to bring both MX5's. The other one may not be ready, but even if it is, there might be an issue on the day seeing as it's a new build. I entered both days, so want to make the most of it. See you on the weekend. You will be a few seconds quicker than me. But if the other car works, I might be knocking on low 1:40's.
    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. #42
    Registered User lightyear's Avatar
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    The track was wet until about 3:30, but the last session was pretty dry. The car managed a 1:54, so the exhaust and intake must be holding it back as the Nankangs had awesome grip. Well, in the dry session anyway. The Nankands are crazy loud, itís like the 4wd mud tyres on a hwy. I had a lot of fun sliding around on the wet track, but itís so much better in the dry, you can really lean on it. VicV8ís are down for there race meet. Itís funny being there with all the guys, and I donít have my commodore at the track.

  13. #43
    Registered User lightyear's Avatar
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    Looks like it's sold now. Well I have a deposit anyway. Rare shot not going sideways..

    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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