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Location: United Kingdom
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Guess my car's weight for spring plate install
Please help me guess the weight of my car.
I found this excellent article on how to set the angle for the 'droop' of the spring plate :- http://www.rennlight.com/cgi-bin/spring.cgi I will be installing 26mm bars and Sway-a-Way spring plates to my 73T, but have no real guess at the cars weight - I need this to plug in to the formulae. It is a US Spec 1973 911T with the following weight changes :- Overriders and all 'S' trim removed ST Seats and TRS harnesses fitted Removed all rear interior sound deadening Removed rear seats 'RS' door panels fitted Webers and SSI's instead of MFI and Standard Exhaust :-) Rear T45 Cage If the above makes no real difference to standard, then what standard weight should I use in the formulae ? Thanks Ian
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Ian Highfield 1992 964 C2 Manual with RS Suspension etc. 1973 911T Narrow body Hot Rod with 2.7 Carrera engine and loads of period modsl - SOLD 1986 Carrera Coupe Sport with Stainless Silencer and SW Chip (256 fwbhp) - SOLD |
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06-26-2009, 05:11 AM
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I don't have a weight for you, but look in the PCA racing rules. There should be a weight listed there for your car.
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John Snodgrass 1973 Porsche 911 "Barney" (race car for sale) 2008 Nissan Maxima - Daily Driver 1999 F350 Diesel Crew Cab - Tow Beast 1990 Airstream 36' Land Yacht - Home Away From Home |
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06-26-2009, 06:56 AM
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
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2300#
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06-26-2009, 07:01 AM
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Go to your local waste transfer station or truck weigh stop and hop on the scale...
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06-26-2009, 07:34 AM
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(the shotguns)
Join Date: Feb 2006
Location: Maryland
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another vote for 2300 lbs.
don't know what that is in milimeters. 
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***************************************** Well i had #6 adjusted perfectly but then just before i tightened it a butterfly in Zimbabwe farted and now i have to start all over again! I believe we all make mistakes but I will not validate your poor choices and/or perversions and subsidize the results your actions. |
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06-26-2009, 07:36 AM
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yes, just weigh it
that is Thom's article BTW take 2,340 and subtract the rest - should be < 2,300 for a DIN wt. spec. but you need to add the driver |
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06-26-2009, 08:31 AM
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1061 kg
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poof! gone |
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06-26-2009, 08:38 AM
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Car has no brakes or suspension installed :-)
I need the weight for Thom's formulae to install my suspension so then I can drive it. Looks like 2300lbs as a start - thanks. Ian
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Ian Highfield 1992 964 C2 Manual with RS Suspension etc. 1973 911T Narrow body Hot Rod with 2.7 Carrera engine and loads of period modsl - SOLD 1986 Carrera Coupe Sport with Stainless Silencer and SW Chip (256 fwbhp) - SOLD |
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06-27-2009, 10:04 AM
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Location: Galivants Ferry, SC
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Ahem.....Wil's formula....Thom's excellent software execution...
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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06-27-2009, 05:18 PM
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Yes indeed, thanks to both Wil and Thom :-)
Pictures and write-up when I get to it, probably a week from now. Ian
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Ian Highfield 1992 964 C2 Manual with RS Suspension etc. 1973 911T Narrow body Hot Rod with 2.7 Carrera engine and loads of period modsl - SOLD 1986 Carrera Coupe Sport with Stainless Silencer and SW Chip (256 fwbhp) - SOLD |
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06-28-2009, 12:08 AM
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The calculator works well but is very sensitive to correct weight.... try to get it weighed somehow.
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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06-28-2009, 03:46 AM
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Wil
The car is up on the lift and has no suspension or brakes installed at all - i.e. a bare floorpan. I have installed the banana arms, and want to install the TBars and Spring Plates next. I have no way of weighing the car (or moving it at all) so just wanted a good guide as to the angle I should use to do the first install before I lower the car to the ground. It will go for a full corner weight and alignment at Tuthills after that. Ian
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Ian Highfield 1992 964 C2 Manual with RS Suspension etc. 1973 911T Narrow body Hot Rod with 2.7 Carrera engine and loads of period modsl - SOLD 1986 Carrera Coupe Sport with Stainless Silencer and SW Chip (256 fwbhp) - SOLD |
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06-28-2009, 07:42 AM
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Just be prepared to do it twice.....the whole reason for coming up with the methodology was because you heard of all the horror stories needing to do it 5 times to get right. I noodled the numbers and time has shown the method to work well as feedback reports indicate. Maybe you "should have" weighed the car beforehand, too late now it seems.....the numbers given you ought to be pretty close but it is best to get real car weights for this process. Just a caveat.
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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06-28-2009, 10:51 AM
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2009 Porsche Cayman S
2009 Porsche Cayman S
