Jump to content
SAU Community

Recommended Posts

Hi guys

Trying to understand power and top speeds at various race tracks. I know there are a heap of variables but i'm doing this just to get a general idea.

What would be useful is car, weight, power (kw at the wheels or estimate) and aero. Yes, other things like gearbox (sequential vs H pattern), gearing and traction come into it but, like I said, i'm just after estimates.

Ideally your speed will be via a gps system rather than a quick glimpse at the dash.

I'll start...

Car: 33 GTR
Weight: 1650kg fuelled with driver.
Power: 450awkw (claimed)
Aero: standard
Wakefield: 214kmh
Eastern Creek: 245
Mt Panorama: 272 but backed off very early cause i'm weak.
Add what ever tracks you've raced at.

I'm predicting that my speeds are low for the power level, but we'll see.

Edited by tk80
Link to comment
https://www.sau.com.au/forums/topic/425745-top-speed-circuit-vs-power/
Share on other sites

The biggest factor in top speed is power, when comparing similar. Aero differences from different wings, whether you have the windows down, etc will play a small part as well. Grip levels will play a small part also as it determines how early you can get on the gas. Car weight and wheel weight also plays a part, as does tyre width. Skinnier tyres with a higher grip level will out perform wider tyres with lower grip, because wider tyres create more rolling resistance.

Your mid and exit corner speed out of the last corner onto the straight plays a major part in your terminal speed at the end of the straight, I have about 110kW atw in the Speads, but I'll hit 260+ at the end of the main straight at PI due to coming off of the last corner well.

R33 GTST,

350 rwhp,

Home made front splitter & Gt wing

Lakeside 57.6 sec

232 kph into carousel

217 kph into hungry.

F, 245/45/17 FZ201

R, 255/40/17 FZ201

QSTAR/Race chrono.

big speeds Noddy!

obviously got alot more power now than whenever we've been on the track together!

Only about 50hp, most gains have been in aero and suspension. These federals have such woweful grip i have put a lot of time into setup. LOTS OF TIME. As a result, mid corner speed os up 10-15 kph at carousel, hungry and estern loop. So looking forward to the new motor and better tyres.

I have a little ae86 levin out of Japan. Ex TRD cup car, its only got 150 rwhp, 920kg wet with driver, punching out 60.8 sec. Its na1600 on webbers 225/50/15 V70A. Such a fin car to drive. Changing gears @ 8500-9200 rpm...ind bending.

Edited by Noddy

got a video or link to the results Stuart?

Car: 180SX
Weight: 1360kg incl driver
Power: 200rwkw (claimed by previous owner when i bought it)
Aero: none
Box: stock H Pattern
diff : 4.3 shimmed viscous LSD

Tyres: Federal FZ201
Lakeside: 205.5km/h
Time: 59.6 (05/04/2012 on Natsoft and QR's 2012 midweek sprint results)

Only about 50hp, most gains have been in aero and suspension. These federals have such woweful grip i have put a lot of time into setup. LOTS OF TIME. As a result, mid corner speed os up 10-15 kph at carousel, hungry and estern loop. So looking forward to the new motor and better tyres.

I have a little ae86 levin out of Japan. Ex TRD cup car, its only got 150 rwhp, 920kg wet with driver, punching out 60.8 sec. Its na1600 on webbers 225/50/15 V70A. Such a fin car to drive. Changing gears @ 8500-9200 rpm...ind bending.

link to video or results for that too please :)

S15 so not directly comparable.

Car: s15 200sx

Weight: 1150kg without driver

Power: 265rwkw

Aero: wing and front splitter

Wakefield: 199km/h (via data logger but that is with my foot still completely flat to the floor at the kink)

Eastern Creek: 228km/h

1.04.0 at Wakefield

1.39.6 at Eastern creek

Have a new engine in the car now that is yet to go to the track.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...