Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: Weight.
b14wrc

posted on 24/1/15 at 10:25 PM Reply With Quote
Weight.

Well, weighed my rolling chassis last night. Not impressed.

http://www.dark-engineering.com/?p=78

Rob






View User's Profile E-Mail User View All Posts By User U2U Member
wylliezx9r

posted on 24/1/15 at 10:30 PM Reply With Quote
How much do the engine and box weigh on their own?





I spent a lot of money on booze, birds and fast cars. The rest I just squandered.
George Best

View User's Profile E-Mail User View All Posts By User U2U Member
b14wrc

posted on 24/1/15 at 10:39 PM Reply With Quote
Going to weigh the chassis with out the engine and gearbox and work it out.

I'm guessing around 350Kg. The gearbox in my Lotus is a lot lighter. It's very surprising as the fiat coupe I took the engine out was a fast car, can't see how with the weight of the engine, at least it should be strong in a light weight car? Lol

I'll post the weight when I measure it. It is interesting. Got to get the clutch sorted on my Elise next....






View User's Profile E-Mail User View All Posts By User U2U Member
Doctor Derek Doctors

posted on 24/1/15 at 10:39 PM Reply With Quote
Rolling chassis with a single roll hoop 520kg?!? That can't be right surely.





Designer and Supplier of the T89 Designs - Single Seater Locost. Build you own Single Seater Racecar for ~5k.

Plans and Drawings available, U2U or e-mail for details.

Available Now: The Sports Racer Add-On pack, Build a full bodied Sports Racer for Trackdays, Sprints and Racing.



www.t89.co.uk
www.racecarwings.co.uk

callan@t89.co.uk

NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
View User's Profile Visit User's Homepage View All Posts By User U2U Member
b14wrc

posted on 24/1/15 at 10:41 PM Reply With Quote
Fiat coupe 20valve turbo.....

???? It's a rough estimate as I weighed in with bathroom scales, but that's what I got.....






View User's Profile E-Mail User View All Posts By User U2U Member
loggyboy

posted on 24/1/15 at 10:50 PM Reply With Quote
Scales accurate?






View User's Profile View All Posts By User U2U Member
b14wrc

posted on 24/1/15 at 10:54 PM Reply With Quote
I hope not!






View User's Profile E-Mail User View All Posts By User U2U Member
b14wrc

posted on 24/1/15 at 10:55 PM Reply With Quote
Uploaded a photo with the motor in, the mounts need a bit more work, but there in. Still some chassis work left to finish and it's all tacked at present.

Rob






View User's Profile E-Mail User View All Posts By User U2U Member
snapper

posted on 25/1/15 at 07:03 AM Reply With Quote
If you are putting 1 scale under each wheel in turn you need to block up the other wheels to aprox the same height as the scales or the load is uneven
Plus your asking the scales to well past there design weight and at that end of the scale it's never accurate
A bonus to this is that you can tell the misses she probably weighs less than she thinks
But I'll leave that to you as if you phrase it wrong you'll be in the divorce courts quicker than you can say "Kit car for sale"





I eat to survive
I drink to forget
I breath to wee my ex wife off (and now my ex partner)

View User's Profile View All Posts By User U2U Member
Doctor Derek Doctors

posted on 25/1/15 at 07:34 AM Reply With Quote
I wouldn't believe the bathroom scales! The tolerance on them is massive. If each one is 10% out that more like 460kg





Designer and Supplier of the T89 Designs - Single Seater Locost. Build you own Single Seater Racecar for ~5k.

Plans and Drawings available, U2U or e-mail for details.

Available Now: The Sports Racer Add-On pack, Build a full bodied Sports Racer for Trackdays, Sprints and Racing.



www.t89.co.uk
www.racecarwings.co.uk

callan@t89.co.uk

NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
View User's Profile Visit User's Homepage View All Posts By User U2U Member
bi22le

posted on 25/1/15 at 09:03 AM Reply With Quote
I ditched my efforts of using 4 x bathroom scales to corner weight my car because they were so inaccurate.

It changed by min 10kg each just by unloading and then reloading the car on to them.





Track days ARE the best thing since sliced bread, until I get a supercharger that is!

Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1

Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I

View User's Profile View All Posts By User U2U Member
KJK

posted on 25/1/15 at 09:48 AM Reply With Quote
I don't think 520 is to bad my riot is 410 and my old blade engined striker was 430 and the cossie engined Westfield was 660 and was by far the quickest car !
View User's Profile View All Posts By User U2U Member
mark chandler

posted on 25/1/15 at 09:51 AM Reply With Quote
I used bathroom scales to corner weight, but dialed them all in with 100 litres of water on top separately before I started = 100kg + plastic.

I got repeatable results proven by swapping them around, you need to lower gently with a trolley Jack, flat floor and always the same contact point, sit in the car and lean forwards and watch the dials leap so have a friend sit in the drivers seat holding the wheel.

View User's Profile View All Posts By User U2U Member
motorcycle_mayhem

posted on 25/1/15 at 10:45 AM Reply With Quote
Bathroom scales are accurate if used carefully. I had mine on wheeled dollies, so that they'd settle comfortably.
I now have 'proper' plates (Longacre), proving how accurate the bathroom scales were.

My R1oT (similar chassis as yours), Yamaha R1, comes in at 413 Kg, fully loaded in full road trim
My friends Riot (Zetec SE), a very similar thing to yours, came in at 570 Kg, full road trim

My stripped race ready 1000cc Mega'Busa' came in at 409 Kg
The same car with a Hayabusa, in full road trim came in at 486 Kg

I don't think (therefore) that you've to worry unduly

View User's Profile View All Posts By User U2U Member
benchmark51

posted on 25/1/15 at 12:59 PM Reply With Quote
My xflow locost road car with full tank, spare wheel, cloth cover, small bag of tools and me in it weighed in at 630kg
I'm around 76Kg in me socks!

[Edited on 25/1/15 by benchmark51]

View User's Profile View All Posts By User U2U Member
b14wrc

posted on 25/1/15 at 01:00 PM Reply With Quote
Thanks for the replies, some useful tips. At this stage of the build I'm only using it to estimate where things should go. I think I'll take the motor out and weigh the chassis on its own and then weigh the engine separately.

Loading it was very difficult, did it on my build table.

I'll up date next month.

Rob






View User's Profile E-Mail User View All Posts By User U2U Member
kango

posted on 7/2/15 at 03:07 PM Reply With Quote
My Birkin with 20v Toyo,ford box and live axle = 520 kg
View User's Profile E-Mail User View All Posts By User U2U Member
coyoteboy

posted on 7/2/15 at 05:45 PM Reply With Quote
I just dont believe that weight tbh! My alloy v8 without box comes in at 185kg and the box is only 65kg!

[Edited on 7/2/15 by coyoteboy]





Report your local potholes, it actually works!

View User's Profile Visit User's Homepage View All Posts By User U2U Member
FERRARIST

posted on 7/2/15 at 06:09 PM Reply With Quote
quote:
Originally posted by b14wrc
Well, weighed my rolling chassis last night. Not impressed.


Fiat COupe 20VT engine with gearbox weights around 250kg, with A/C removed, power steering as well......
And i doubt that your measure is correct.....
Almost finished similar mid-engined build, but with Alfa 166 3.0V6 - strong healthy man can lift my front end....did not scaled it yet, but i don't expect more than 600kg when totally finished.....
Description
Description

BTW very nice choice of engine, i'm about to buy same engine just to have one for spare....

View User's Profile Visit User's Homepage View All Posts By User U2U Member
unijacko67

posted on 8/2/15 at 12:40 AM Reply With Quote
If it helps, my Reliant Kitten with Honda s2000 engine and box, live axle, fibrglass boby, alloy hubs used to weigh in at 790kg in road trim.





http://www.kittenkitcar.co.uk

View User's Profile E-Mail User Visit User's Homepage View All Posts By User U2U Member
snapper

posted on 8/2/15 at 07:04 AM Reply With Quote
If you want to be light, go bike
What BHP @ Ft/Lbs are you expecting? In the Bhp per tonne is the main figure and just uner700Kg won't be an issue





I eat to survive
I drink to forget
I breath to wee my ex wife off (and now my ex partner)

View User's Profile View All Posts By User U2U Member
b14wrc

posted on 8/2/15 at 10:43 AM Reply With Quote
Hi,

Standard trim the engine makes 220bhp, and a similar torque figure. I'm looking at a full rebuild with a ported and polished head, tubular exhaust manifold and more boost - so at least 300bhp maybe a little more. Power to weight is aimed at the magic 500bhp per tonne.


Rob






View User's Profile E-Mail User View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [ 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.