793 replies to this topic

[Zoobeef]

He means its contributes in that a more experianced driver may have felt an issue earlier or done something different to control the car and avoid the incident. All skills only learnt from driving the car for hours and hours.

Same with my toe link crash, i cant hand on heart say everyone would have hit the tyres. As some wouldnt, I just need their level of skills to get myself out of situations i put myself in.

[SteveA]

There is always that split second where you think, shall I try to catch it or is it too late and should I just lock the steering and hit the brakes hard. Experience is the only thing that will help you decide in those situations.

[slindborg]

I spun at a corner that only proper morons can spin in at Llandow... partly it was the car setup in that it had lots of grip until the limt and then just went as opposed to being progressive, and MOSTLY down to me lifting the throttle a tiny tiny amount. I'm sure the spin would have happened anyway but my lack of skill didn't help, or maybe it did so I wasn't going as fast as I could have been.

 

To only damage ones pride is the most successful outcome of an incident like this.

 

 

[fiveoclock]

really, so your saying that if you take a corner flat in 4th gear the previous lap on a drying track with the no traction issues and the next lap it lights the tyres up and snaps sideways just at the point that the engine cover blows off and a driver behind me notice the rear of my car unloads by an inchm, that's my driving ability? wow that's a new one to me

I didnt say anything about ability, I dont know what your ability is. What I do know is that you had no experience of driving the car and no experience of the circuit you raced on.

[fiveoclock]

An inch is a very small amount how could he notice that flat out in 4th?... Just saying

If he'd known the circuit he shouldnt have been flat out in 4th in the wet at that particular point

[fiveoclock]

He means its contributes in that a more experianced driver may have felt an issue earlier or done something different to control the car and avoid the incident. All skills only learnt from driving the car for hours and hours.

Same with my toe link crash, i cant hand on heart say everyone would have hit the tyres. As some wouldnt, I just need their level of skills to get myself out of situations i put myself in.

That and also if he'd had more time in the car at that circuit he'd have known about the surface in the wet at the exact point where he crashed. It seems to me that the OP always knows best and wont take advice. I raced in the plssing rain at that circuit a few weeks later and came away with a winners trophy not because I was the best driver nor because I had the best car but mainly due to the fact I knew the circuit so well right down to every bump and surface change where a lot  others didnt. 

[fiveoclock]

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Edited by fiveoclock, 14 May 2015 - 04:59 PM.

[turbotoaster]

Added some heat shielding to the inside part of the clam as a belts and braces thing.


The chopped the end off the tailpipe, im thinking i might get some black HT paint for the more stealth look

 

Wanted to ensure no water temp issues with the car when pushed hard so managed to get a pro alloy triple pass rad.




The plan is to fit the biggest laminova they do and dump all the heat into that which will clear a side pod for my intercooler plans(thats going to be next winter though as at the moment im enjoying just driving it)

Ive read about running a triple pass on the road does increase temps but my car has always had the opposite issue by running a bit cold on the road with the QED thermostat so probably balance out.


With regards to the exhaust, went out last night after changing the spring rates from 450/700 to 700/900 and there is no rubbing at speed up to 100mph, so i could actually give the car a bit of stick to get heat into everything and I hadnt turned fuel cut off in the emerald software, so the car was like an old group c car at lemans, throwing massive flames every gear change and flaming on overrun, First time i looked behind me and saw flames in my passenger mirror I thought the car was on fire, only when i blipped the throttle and the flame went out I realised it was coming from the tailpipe, more testing showed on the road throwing flames is fun but on track that cant happen, plus with a small fuel tank I cant afford to waste fuel so a few tweaks to the map and no flames at all no matter what i do which is a piece of mind, will have to keep an eye on it and see how we get on.

One good fun thing about the exhaust is pulling up, getting out of the car and looking into the tailpipe seeing your turbine wheel spin!


Did a tiny bit of work on the map aswell runnng 14.5psi and 12.0 afr, will pull a little bit more fuel out of the map to take it to 12.5afr and im going to up the fuel pressure as according to the datalog im at 99% injector duty, I dont believe its that high as it would be alot quicker than it is as im on 470cc injectors but shows its not making bad power.

 

Turned the fuel pressure up to 4.2bar and rescaled the map and took it for a run, afr in acceptable range, so that tells me since the injectors are opening less yet still maintaining the right afr that my pressure isnt dropping at high rpm so there shouldnt be a pump/filter issue

Probably turn the wick up to 18psi for fun on the road and drag and keep it at 14.5psi for track as I dont want the engine popping until i have my forged lump built( at that point i will just turn it up to 20psi and wait for the stock bottom end to go in a blaze of glory

 

had a bit of quite time this morning so fitted my adjustable fuel reg, just need to have the engine running tomorrow with the air compressor plumbed into the vac line to check its nicely raising 1:1


Also my intercooler turned up, managed to get it pretty cheap sniping it off ebay
my younest being used as a scale


trial fitted to see how it looks and what plumbing will be like, it will need a thin coat of black paint of course


will be fitted over winter this year but as long as i can get the air to it I think it will work

 

Had a spare couple of hours this morning so made some rubber skirts for my side sills, been meaning to make these for about a year and finally got around to it

 

currently sat at 60mm above the ground as my road height is 20mm above what i will run on track.

 

Interesting thing is that with 450lb front springs the car compresses circa 35mm at 85mph, had to put the spring rates back up to 700lb on the front so i could get above that speed without the underbody scraping on the floor! so its making some downforce!

[Claws]

That is a terrible scale, your baby could be 4ft tall

[Nev]

Interesting thing is that with 450lb front springs the car compresses circa 35mm at 85mph, had to put the spring rates back up to 700lb on the front so i could get above that speed without the underbody scraping on the floor! so its making some downforce!

This quietly understated post of Lee's probably passes by most of the clueless armchair critics that have posted on here previously. To actually get that much down force at 85 MPH is truly remarkable and an ratification of Lee's considered logic and practical experimentation. I would imagine that on a even on low speed track your car will be properly glued down to the tarmac and a substancial contribution to carrying speed round corners. It might be interesting to park the car up, and place suitable weights over the car's bodywork and then measure the amount you had to add before it grounds out, that way you could report back the actual amount of down-force you are experiencing at 85 MPH.

Edited by Nev, 29 June 2015 - 10:20 AM.

[SteveA]

Are you using shock pots to measure the downward compression?

[Nev]

Are you using shock pots to measure the downward compression?

Nope, he noticed the bottom of the under body of the car ground out on the tarmac at a steady 85 MPH. For 450 LB springs to compress 35mm at the low speed of 85 MPH there must be pretty massive DF. Just think, using the square principle of air resistance, the down force will double again by 120 MPH and tripple by 145 MPH. Imagine that, the car squatting by 10+CM at racing speeds, sounds almost too much to me!

Edited by Nev, 29 June 2015 - 10:41 AM.

[turbotoaster]

on my splitter I run vertical fences between my front tyres which extend back to be roughly inline with where my feet are.

 

I did wonder was it my splitter bending but when I looked underneath the car I could see me vertical sections were rubbing, these are 40mm from the ground.

 

I wondered if it was bumpy ground so found a nice new smooth bit of dual carriage way and at 85mph it does the same thing, not just at a steady speed but accelerating aswell hence I was limited on mapping until I upped the spring rates.

 

If it was the splitter flexing then it would do it even with harder springs.

 

its not scientific I know, I will confirm the compression with tie wraps on the dampers, because a smooth dual carriageway shouldn't have bumps that will compress the suspension that much, if it did I would feel it.

 

I don't have shock pots, if anyone can lend me a set I can get accurate data

[slindborg]

incidentally, your description of what you think the thermostat does and the rad imply you don't know how it all works.

that's fine, we don't all know it all.

 

You could have a thermostat that opens fully at 0deg C, one that opens at 40Deg C and one that opens at 80Deg C, but under the same operating conditions, each configuration would see the cooling system "max out" at the same temperature....

 

eg you can put these cool running stats on cars but it wont lower the overall operating temp of the engine.

[turbotoaster]

your right, I copied and pasted some of the post from seloc and had that discussion which indeed im incorrect, forgot to amend it when copied it here,  im contacting QED to try and get a high operation temp stat to put in my external one as I think im running a 72c one

[Captain Vimes]

Are you still entering time attack this year? When is the first round you're competing in?

[turbotoaster]

I will be doing the public sessions at oulton so the car get scruitneered and probably do croft if I have the money, £460 for the day is a lot of money though so we will see

[FLD]

Keep us posted if you're going.  I'll bob over to Oulton if I know you're there.

[Pidgeon]

Is £460 the entry for a glorified track day?

[turbotoaster]

£363 entry, £50 time attack membership and £50 for MSA licence, so its not a cheap day hence if I have the money spare I will do it, if money is tight the I would rather go and do trackdays as I can get 3 full days out of that