Weight Reduction

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Weight Reduction
Topic Started: Tue Oct 14, 2008 11:12 am (580 Views)
Matt	Tue Oct 14, 2008 11:12 am Post #1
Administrator - Hawk Eye Posts: 14,126 Group: Admin Member #20 Joined: November 8, 2005	This thread is for everything to do with Weight Reduction for track use.



dave_irl	Wed Nov 12, 2008 7:50 pm Post #2
I love offset. Posts: 8,729 Group: Admin Member #6 Joined: November 2, 2005	link to good thread on polycarbonate windows



Big Ben	Wed Nov 12, 2008 8:38 pm Post #3
Member Posts: 4,905 Group: Members Member #155 Joined: January 26, 2006	Seriously, Carbonology.com Many useful items including ready made sheets for door cards!



jeremy	Mon Nov 17, 2008 10:52 am Post #4
Member Posts: 6,567 Group: Members Member #2,018 Joined: December 9, 2007	Easy weight reduction & cheap too................. Got to be worth a second per lap per stone, surely. @ 1HP gained per 13.75 LBS lost for a 2.5-16V http://www.weightwatchers.co.uk/index.aspx Jeremy Edited by jeremy, Tue Jan 27, 2009 5:09 pm.



NitrousVic	Wed Nov 19, 2008 5:44 pm Post #5
Newbie Posts: 12 Group: Members Member #2,879 Joined: June 29, 2008	Voltphreaks VPH400 3.5lb Battery Review: Shockingly Light - LotusTalk - The Lotus Cars Community



jeremy	Tue Jan 27, 2009 11:54 am Post #6
Member Posts: 6,567 Group: Members Member #2,018 Joined: December 9, 2007	Losing weight=more horsepower? Discuss. My 2.5-16 weighs 1280 KG's +/- It has 205 HP +/- Therefore each 6.24 KG's is equal to 1 HP (?) This equates to approx 13.75 lbs per HP (?) Free horsepower.......? I reckon then, that when I go tracking, I gain about 15-18 HP by throwing out everything not bolted down. Not bad for 15 minutes work. Prof. Jeremy



cossie connoisseur	Tue Jan 27, 2009 1:07 pm Post #7
fat tits Posts: 9,671 Group: Members Member #110 Joined: December 18, 2005	which is why my manual is faster then my auto cos one is full speck and the other basic speck. its quite easy to ditch weight in the car, but not quite so easy to lose it in the right places so you dont loose handling ect



dave_irl	Tue Jan 27, 2009 1:09 pm Post #8
I love offset. Posts: 8,729 Group: Admin Member #6 Joined: November 2, 2005	Auto boxes also weigh ALOT more (59kg!) than manual boxes.. Autobox weighs 59kg, not 59kg more than manual... Edited by dave_irl*, Tue Jan 27, 2009 1:09 pm.



cossie connoisseur	Tue Jan 27, 2009 1:14 pm Post #9
fat tits Posts: 9,671 Group: Members Member #110 Joined: December 18, 2005	yep



Johnboy Mac	Tue Jan 27, 2009 2:38 pm Post #10
Member Posts: 1,612 Group: Members Member #2,771 Joined: June 12, 2008	cossie connoisseur Tue Jan 27, 2009 1:07 pm its quite easy to ditch weight in the car, but not quite so easy to lose it in the right places so you dont loose handling ect Dead right. If a vehicle is stripped of all excess weight it should then be corner weighed at each wheel. Then ballast (lead)should be added back in to keep car balanced. Relocating battery, fuel tank etc can partly act as ballast.



jeremy	Tue Jan 27, 2009 5:07 pm Post #11
Member Posts: 6,567 Group: Members Member #2,018 Joined: December 9, 2007	Johnboy IRL Tue Jan 27, 2009 2:38 pm cossie connoisseur Tue Jan 27, 2009 1:07 pm its quite easy to ditch weight in the car, but not quite so easy to lose it in the right places so you dont loose handling ect Dead right. If a vehicle is stripped of all excess weight it should then be corner weighed at each wheel. Then ballast (lead)should be added back in to keep car balanced. Relocating battery, fuel tank etc can partly act as ballast. John, thats a damn good point, I never thought of that. Jeremy



dave_irl	Tue Jan 27, 2009 7:45 pm Post #12
I love offset. Posts: 8,729 Group: Admin Member #6 Joined: November 2, 2005	jeremy Tue Jan 27, 2009 5:07 pm Johnboy IRL Tue Jan 27, 2009 2:38 pm cossie connoisseur Tue Jan 27, 2009 1:07 pm its quite easy to ditch weight in the car, but not quite so easy to lose it in the right places so you dont loose handling ect Dead right. If a vehicle is stripped of all excess weight it should then be corner weighed at each wheel. Then ballast (lead)should be added back in to keep car balanced. Relocating battery, fuel tank etc can partly act as ballast. John, thats a damn good point, I never thought of that. Jeremy It is a damn good point.. Something that I will bring to the attention to some of my friends who are totally OTT with weight reduction. It might be worthwhile to invest in a decent motorsport scales (even just 1, not the whole 4) so you could work out the best balance of your car, rather than all out weight reduction. After all, handling is what its all about right?



Johnboy Mac	Tue Jan 27, 2009 8:19 pm Post #13
Member Posts: 1,612 Group: Members Member #2,771 Joined: June 12, 2008	Forgot to mention (and this especially applies to 190's with M103/104 motors) if you strip the car of all excess weight but now find that the front is heavier overall percentage wise that the original use extra ballast to shift weight to the rear or even more if you wish and it's handy to adjust untill it feels correct, the car may not be as light as it could be but handling, especially understeer/turn in will have been improved thus making the car easier to drive which in turn will make it faster and importantly safer. Edited by Johnboy Mac, Wed Jan 28, 2009 10:06 am.



Sev	Wed Jan 28, 2009 5:43 am Post #14
No Longer a Registered Member Posts: 1,981 Group: Members Member #962 Joined: February 19, 2007	dave_irl Tue Jan 27, 2009 1:09 pm Auto boxes also weigh ALOT more (59kg!) than manual boxes.. *Autobox weighs 59kg, not 59kg more than manual... IF you count the torque converter as part of the transmission, and also the extra fluid it requires, then yes. if not, then not so much



dave_irl	Wed Jan 28, 2009 7:29 am Post #15
I love offset. Posts: 8,729 Group: Admin Member #6 Joined: November 2, 2005	I would count those parts Sev, as a manual trans car wouldn't have them therefore you can include it in the weight difference.



pentoman	Fri Feb 27, 2009 6:43 pm Post #16
Resident OVP Expert Posts: 2,697 Group: Members Member #11 Joined: November 6, 2005	Someone should weight all the parts they take out of a car. We did that once with a Golf; was interesting to see what was heavy and to add it all up.



kentronix	Fri Feb 27, 2009 6:47 pm Post #17
Admin Posts: 16,348 Group: Admin Member #147 Joined: January 20, 2006	there is a thread somewhere with a few weights in it, leccy windows, console, seats, doors etc. I remember weighing some bits. It was started by zoomer I think.



Nath_XPR	Sat Oct 10, 2009 10:54 am Post #18
Nordschleife Taxi Posts: 936 Group: Members Member #2,493 Joined: April 7, 2008	I had to fill up my windscreen washer bottle today, it took ages to fill and made me think how much weight you would take off by draining it. Looked in the manual and the washer bottle holds 5 liters.



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