Bruntingthorpe Test day ?

Discussions about events and meetings

Moderators: eastlmark, BIG_MVS, phildini, Alpineandy, Test Moderator

User avatar
User

simontaylor

Rank

Club Member

Club Member
Posts

5196

Joined

Thu Apr 15, 2004 12:33 pm

Location

Fleet, Hampshire


Has thanked: 26 times
Been thanked: 39 times

Re: Bruntingthorpe Test day ?

Postby simontaylor » Wed Aug 30, 2017 3:56 pm

agreed the car accelerates faster in the lower gears, so it must be putting more power and torque to the wheels in the lower gears..... by multipying it through the gear box (basically a ratio converter).
1986 : '86 GTA v6 turbo, with Adaptronic ECU
Firsts at
2007 : Gurston Down & RAOC Champion
2008 : Rushmoor & Eelmoor & ACSMC Hillclimb class Champion
2009 : Longcross & Eelmoor
2010 : Crystal Palace & Eelmoor
2016 : Rushmoor & 5th O/A
User avatar
User

stephendell

Rank

Club Member

Club Member
Posts

6386

Joined

Wed Apr 14, 2004 7:25 pm

Location

London


Has thanked: 28 times
Been thanked: 43 times

Re: Bruntingthorpe Test day ?

Postby stephendell » Wed Aug 30, 2017 4:49 pm

Tony Smith wrote:Interesting to see the power outputs now they are adjusted. I reckon Dave Miles' car can't be lighter than my car - I'm only 5kg heavier than him and his car has lots of bits in than mine hasn't. I did have about 10 gallons of fuel though but still?


We had this conversation on the day and next time we will weigh all of the cars in the exact same location to avoid any differences due ground level.

Dave has lightweight wheels, aluminium calipers, fibre glass front bumper, no spare wheel and I think no reinforcement in the rear bumper. He does have additional equipment though.

1 gallon of fuel = 4.55 litres

Apparently unleaded weighs in at between 710g - 770g per litre so up to 3.5kg per gallon.

We did weigh Dave's car twice and the adjusted difference amounted to about 6bhp per tonne.

His rebuilt A610 gearbox also has a great shift action which will have helped with quick changes.

Also we weighed all the cars first thing and did all the powers runs last thing so fuel load will have decreased and driver weight increased proportional to size of lunch lol

Most of the weights look about right. Barry's A610 came in quite light though.

Only really standard car was Mark's Clio. Measured weight put the driver and other vehicle contents at 84kg

I had allowed 90kg for myself as passenger for the power runs and I was 92.9kg (dressed) when I checked at home so a maximum of 0.26% variation (ie negligible).

I think the main thing to note is that all the cars were tested on the same day with the same equipment in the same conditions so pretty much a level paying field.
Trafic, Twingo GT, Vel Satis Turbo x 2, Clio V6 Proto Ph2, Vel Satis 3.5, Avantime, Spider, Alpine A610, GTA Atmo x 4, GTA Turbo x 3, R21 Turbo GpN, R5 Gordini Turbo Mid Engine, Alpine A110, Yellow Smart
User avatar
User

clee

Rank

Club Member

Club Member
Posts

10096

Joined

Fri May 28, 2004 11:58 am

Location

Derbyshire


Has thanked: 50 times
Been thanked: 80 times

Re: Bruntingthorpe Test day ?

Postby clee » Wed Aug 30, 2017 5:17 pm

Ratty has an old lump with a set of cams and an old box ....must just be skillfully driven ....WEIGHT is King !
Lowest power giving 2nd best results :thinking

Rebuilt box will be going in soon.LSD with altered ratios and final drive.Will be interesting to see what that does.All my other mods are concentrating on heat issues.
User avatar
User

stephendell

Rank

Club Member

Club Member
Posts

6386

Joined

Wed Apr 14, 2004 7:25 pm

Location

London


Has thanked: 28 times
Been thanked: 43 times

Re: Bruntingthorpe Test day ?

Postby stephendell » Wed Aug 30, 2017 5:24 pm

clee wrote:Ratty has an old lump with a set of cams and an old box ....must just be skillfully driven ....WEIGHT is King !
Lowest power giving 2nd best results :thinking.


Yes you were nearly 400kg less than the heaviest 610 (with driver).
Trafic, Twingo GT, Vel Satis Turbo x 2, Clio V6 Proto Ph2, Vel Satis 3.5, Avantime, Spider, Alpine A610, GTA Atmo x 4, GTA Turbo x 3, R21 Turbo GpN, R5 Gordini Turbo Mid Engine, Alpine A110, Yellow Smart
User avatar
User

stephendell

Rank

Club Member

Club Member
Posts

6386

Joined

Wed Apr 14, 2004 7:25 pm

Location

London


Has thanked: 28 times
Been thanked: 43 times

Re: Bruntingthorpe Test day ?

Postby stephendell » Wed Aug 30, 2017 5:31 pm

Also remembered Dave went to fill up at lunch time which massively improved stability at top speed.

That would put him around 1294kg for comparison.
Trafic, Twingo GT, Vel Satis Turbo x 2, Clio V6 Proto Ph2, Vel Satis 3.5, Avantime, Spider, Alpine A610, GTA Atmo x 4, GTA Turbo x 3, R21 Turbo GpN, R5 Gordini Turbo Mid Engine, Alpine A110, Yellow Smart
User avatar
User

clee

Rank

Club Member

Club Member
Posts

10096

Joined

Fri May 28, 2004 11:58 am

Location

Derbyshire


Has thanked: 50 times
Been thanked: 80 times

Re: Bruntingthorpe Test day ?

Postby clee » Wed Aug 30, 2017 5:36 pm

Lol !! yes, I just had a couple of chips....top end doesn't interest me :yawn
Weight on mine looked about right, the same as when I weighed it at the MOT station.

Best example is Terry to Ratty.Terry has a slightly different spec T3 for road use.
Same spec,same builder,same tuner and same driver .
User avatar
User

clee

Rank

Club Member

Club Member
Posts

10096

Joined

Fri May 28, 2004 11:58 am

Location

Derbyshire


Has thanked: 50 times
Been thanked: 80 times

Re: Bruntingthorpe Test day ?

Postby clee » Wed Aug 30, 2017 5:43 pm

I had allowed 90kg for myself as passenger for the power runs and I was 92.9kg (dressed) when I checked at home so a maximum of 0.26% variation (ie negligible).


Yes.... that was quite off putting.I hope the harness didn't chaff too much :wtf
no avatar
User

Custard

Rank

Club Member

Club Member
Posts

424

Joined

Sat Oct 12, 2013 7:02 pm


Has thanked: 0 time
Been thanked: 15 times

Re: Bruntingthorpe Test day ?

Postby Custard » Wed Aug 30, 2017 5:44 pm

Also when you did the power what where the differences in the Power and torque curves between the engines. It would be interesting to over lay them with the results.
User avatar
User

clee

Rank

Club Member

Club Member
Posts

10096

Joined

Fri May 28, 2004 11:58 am

Location

Derbyshire


Has thanked: 50 times
Been thanked: 80 times

Re: Bruntingthorpe Test day ?

Postby clee » Wed Aug 30, 2017 6:08 pm

This is RATS' Racer
WP_20160606_001.jpg

I can only find Terry's on a different set of rollers ATM but I do have results from the runs at EFI-Parts somewhere or Terry or Martin will.I think this run at Peters' was before a few other tweaks.I can't remember exactly what but again Terry or MoFo will....they all blend into one after a while .
Martin should have the curves for Bluey at EFI as well .
AlpineStd11psi13psi_zps3p8mhfzy.jpg
You do not have the required permissions to view the files attached to this post.
Last edited by clee on Wed Aug 30, 2017 6:31 pm, edited 1 time in total.
User avatar
User

stephendell

Rank

Club Member

Club Member
Posts

6386

Joined

Wed Apr 14, 2004 7:25 pm

Location

London


Has thanked: 28 times
Been thanked: 43 times

Re: Bruntingthorpe Test day ?

Postby stephendell » Wed Aug 30, 2017 6:22 pm

clee wrote:
I had allowed 90kg for myself as passenger for the power runs and I was 92.9kg (dressed) when I checked at home so a maximum of 0.26% variation (ie negligible).


Yes.... that was quite off putting.I hope the harness didn't chaff too much :wtf


Bone density apparently ;-)
Trafic, Twingo GT, Vel Satis Turbo x 2, Clio V6 Proto Ph2, Vel Satis 3.5, Avantime, Spider, Alpine A610, GTA Atmo x 4, GTA Turbo x 3, R21 Turbo GpN, R5 Gordini Turbo Mid Engine, Alpine A110, Yellow Smart
User avatar
User

clee

Rank

Club Member

Club Member
Posts

10096

Joined

Fri May 28, 2004 11:58 am

Location

Derbyshire


Has thanked: 50 times
Been thanked: 80 times

Re: Bruntingthorpe Test day ?

Postby clee » Wed Aug 30, 2017 6:26 pm

bone ...yes well ...perhaps ...

bL13bYI.gif
You do not have the required permissions to view the files attached to this post.
User avatar
User

The Saint

Rank

Administrator

Posts

1072

Joined

Thu Sep 08, 2011 11:55 am

Location

Rugby Warwickshire


Has thanked: 45 times
Been thanked: 43 times

Re: Bruntingthorpe Test day ?

Postby The Saint » Wed Aug 30, 2017 6:29 pm

Diffrent kind of "air bags"
The Saint.
Blue A610,
Black Smart Roadster.
SmartEDElectric Drive
no avatar
User

Custard

Rank

Club Member

Club Member
Posts

424

Joined

Sat Oct 12, 2013 7:02 pm


Has thanked: 0 time
Been thanked: 15 times

Re: Bruntingthorpe Test day ?

Postby Custard » Wed Aug 30, 2017 6:47 pm

Ok so you're curves seem to split and move around a bit as if they are being distracted but show the main bands are 4000 to 5500 and the second set 3500 to 5000 are they both 2.5 engines or 2.5 and 3lt. Not sure I could live jill's engine on the road, but where all the fast results from similar higher power band engines.
User avatar
User

clee

Rank

Club Member

Club Member
Posts

10096

Joined

Fri May 28, 2004 11:58 am

Location

Derbyshire


Has thanked: 50 times
Been thanked: 80 times

Re: Bruntingthorpe Test day ?

Postby clee » Wed Aug 30, 2017 6:53 pm

As I said both are same spec 2.5 with higher lift cams and fueling to suit.
Terry's map shows car as std then overlaid with modded runs later in the year .The EFI map will show current state with cams added.
RAT is for track,Terry for road.
I'm sure Martin will have data.The other 3 are JL built so I'm sure he'll have the charts.
User avatar
User

Miles

Rank

Club Member

Club Member
Posts

707

Joined

Thu Apr 14, 2005 9:06 am

Location

Hampshire


Has thanked: 29 times
Been thanked: 10 times

Re: Bruntingthorpe Test day ?

Postby Miles » Wed Aug 30, 2017 7:13 pm

Lee,
when is the RATS racer on track again?
I'm coming to meet you co-driver to learn about weight saving! haha great avatar.
Last edited by Miles on Tue Sep 05, 2017 9:39 pm, edited 1 time in total.
JL Engineering improved GTA and currently the fastest timed at Bruntingthorpe, 164.4MPH ;)
PreviousNext


  • Advertisement

Who is online

Users browsing this forum: No registered users and 1 guest

Powered by phpBB ® | Renault' and 'Alpine' are trademarks of Renault S.A.S. or its subsidiaries and are used with kind permission of Renault France