tin top vs. moonroof - chassis stiffness and weight

[jasongtr]

whats the difference between the two?

my V6 is a sunroof/moonroof model, its a rev1 (for what its worth) with no power steering or abs)

is the tin top noticeably stiffer or not, i appreciate if i were to swap the stuff over to a tin tin top shell its a lot of work so is it worth it?

I am also aware that any weight saved over losing the sunroof will be lost if i got a car with power steering and abs. so i guess the main question is the chassis stiffness. the currently has a std front brace (useless i guess) and no rear brace, these i know will need to be added.

[shibby!]

i noticed a difference between tintop and t bar.

Cant comment on moonroof.

[jasongtr]

i can imagine that one, but i cant see as there would be much in the moonroof/tin top as the front and rear screens are still connected

[jimGTS]

am not sure how true this is....

however the rev5 brouche i got off flashharry states hardtop as 1270kg and the tbar as 1380kg....(turbo model)

im not quite sure if there is actually that much difference, seems a bit extreme to me....



ill have another look, but thats rev5 weights!!!
id imagine the rev1/2 maybe slightly lighter with no abs, side impact bars and all that business..

[jasongtr]

i would hope to get my rev1 moonroof with no abs or ps, and light weight seats/wheels down to 1150 if possible - without going extreme or spending silly money on carbon parts

[JohnnyC]

however the rev5 brouche i got off flashharry states hardtop as 1270kg and the tbar as 1380kg....(turbo model)

Just to compare, the UK rev5 brochure has 1285kg for the moonroof, and 1310kg for the t-bar.

[jasongtr]

any idea what a rev1 moonroof weighs

[matt-mr2]

there is no mention of if its tin top/sunroof
Toyota MR2 - MKII N/A (1989 - 1991)

Dimensions:
Length: 4170mm
Width: 1700mm
Height: 1240mm
Wheel Base = 2400mm
Front Track = 1470mm
Rear Track = 1450mm
Ground Clearance: 135mm
Coefficient of drag: 0.310
Weight: 1210kg
%Weight on front wheels: 42%


http://www.megaboost.co.uk/mr2/frames/t ... .htm#mk2na

[jasongtr]

well if thats the case i should see 1100 kgs maybe, great thanks for that

[fishy89]

i would hope to get my rev1 moonroof with no abs or ps, and light weight seats/wheels down to 1150 if possible - without going extreme or spending silly money on carbon parts

you have got a v6 though mate... thatll add a fair chunk of weight..

[jasongtr]

apparently they are not that much heavier, ill see when it goes on the weighbridge in a few weeks - to give me starting point

[fishy89]

ahhh if not then thats awesome!

yeh get it on the weigh bridge

[toxo]

It's almost completely irrelevant to your question but my MK2 turbo rev3 (Power Steering, tintop, ICE) with half a tank of fuel and me in it came out at 1410kg. I reckon I'm 70-80kg and half a tank of fuel is about 20kg.

Remember the weights that manufacturers quote are usually dry weights.

[jasongtr]

BLIMEY those abs sensors must be at least 10kgs each though

ah well ill see in a few weeks when its taxed and road ready

[toxo]

Meh I'm a tit, my car doesn't have ABS at all updated my post above.

[jasongtr]

ah must be them super doopah lead speakers you have then

[jimGTS]

well if thats the case i should see 1100 kgs maybe, great thanks for that

i wouldnt be suprised you coming back to this thread and telling us it weighs 1300kg to be honest, lol

what have you lost to think your around 1100kg?

[jasongtr]

not much as yet but i wanted the weight done. Then i can calculate as i go

[Torero]

is the tin top noticeably stiffer or not, i appreciate if i were to swap the stuff over to a tin tin top shell its a lot of work so is it worth it?

Jason, according to Terry Heick's book the sunroof version is stiffer than the tin top as the reinforcing struts and additional crossmembers in the roof add more rigidity.

Makes sense.

[jasongtr]

ah thanks for that, heavier though i guess