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Post by enginewhisperer on Jun 23, 2020 4:49:51 GMT -5
After about 5 years building this car I finally got it out for a proper track test! I ran all sessions with no real issues other than being unable to get heat into the (very second hand) tyres so I lacked some grip and stability. Being very careful I managed a best lap of 1:04.57 which is about 2.5 seconds better than my previous best time in a different car. I'm hoping to get it under a minute at this track, which looks to be very doable and would make it the fastest Nissan "S Chassis" Compressor exducer is only 68mm  www.youtube.com/watch?v=4vqY7gZEhnkwww.youtube.com/watch?v=am-h40ngADc  |
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Post by slittlewing on Jun 23, 2020 8:11:01 GMT -5
That looks bloody awesome... and very quick!! What sort of power is it making and did you do any engine internals upgrades?
Love the telemetry on-screen in the second vid (including the damper pots and eng/transmission temps!!) What software produces that overlay may I ask?
Sounds like a set of Toyo R888s should be on order!!
Cheers, Scott
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Post by enginewhisperer on Jun 24, 2020 6:44:44 GMT -5
I'm not a fan of R888s, although they are pretty good in the wet  I'm currently using Advan A050s, ex World Time Attack. I'll run some less ruined ones next time out! The engine is pretty basic (apart from being dry sump), with forged pistons, H beam rods, and some pretty mild cams with solid lifter conversion. It's making 360kw at the rear wheels, with the turbo flow basically maxed out from 5000rpm onwards. Probably works out close to 650hp at the crank. Drive train is a very old Jerico Nascar 4 speed dog box with a sequential shifter and a 5.5" Indy car clutch. I did the data overlay using RaceRender 3. It's pretty good but a bit of a pain getting the data synced to the video nicely. |
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Post by enginewhisperer on Oct 19, 2020 16:49:44 GMT -5
I got back out to the track last week, and am now the fastest Nissan "S chassis" at Wakefield Painfully close to a sub minute lap! If I had backed off slightly later it would have just got there. Unfortunately it was right at the end of the day and I couldn't go for another run. There's a lot more time left in it - mainly in braking. I'm not really right at the cornering limit yet either. Looking at data from a few laps, I could have done a low to mid 59 if I put together a few of the best sectors, so a 58 would be possible I think. youtu.be/Nvk6rfrCiss |
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Post by racket on Oct 19, 2020 21:54:53 GMT -5
Hi Andrew
Starting to her sorted :-)
Like the boost gauge readings
Cheers
john
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Post by enginewhisperer on Oct 19, 2020 22:20:05 GMT -5
yep, the main problem is the rusty driver now! Funnily enough, I started the day on low boost (which I've never tried before) and was over the track noise limit. The exhaust has already been designed to minimise noise, especially at that track - so the only option was to go back to high boost No problems then with the wastegate being held closed a bit more! You can see the boost creep up a bit as I go - which is the closed loop boost control slowly bringing it up to the target value. The base wastegate settings have the boost a bit low because of the ~700m elevation dropping the ambient pressure. |
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Post by enginewhisperer on Apr 4, 2022 5:49:12 GMT -5
I was invited to run my car at World Time Attack this year, and since I wasn't going to be on my usual international team pit crew this year I figured it was a good opportunity! The car makes well over a tonne of downforce at the lower elevation and higher speeds of Eastern Creek Raceway, and with the night time running I decided some titanium skid plates and a front splitter camera were necessary youtu.be/Sa2brnGg9toI ended up 5th in the class, and beat some much more serious cars, although I wasn't really happy with the lap times I achieved. I need to get back there and do some more practice instead of turning up 5 years after driving at that track! There's also in car video of the final lap: youtu.be/35XNgalIbK8 |
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Post by enginewhisperer on Jun 14, 2024 23:02:02 GMT -5
I haven't really updated this thread, but have done the occasional event with the race car over the last couple of years.
The other night I set a new personal best lap time which was nice, and verified that my upgraded brakes seem to help - at least with the driver confidence and brake feel factors!
This is also an excuse post for not having any meaningful updates on the turbine bike project!
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