Very interesting discovery
Originally Posted by Killboy
My '05 Evo (standard model, no SSL package) does NOT have those "fins". I thought it was just an MR/aluminum roof thing...
Summary:
The bumps on the side of the roof were only made on the aluminium roof on the 2005 Evo 8 RS and MR and perhaps the Evo 9 RS and MR as well. I am happy that I learned something new today
Thanks guys!
Carlos
Last edited by fromWRXtoEVO; Mar 20, 2006 at 08:05 PM.
Originally Posted by fromWRXtoEVO
no $hit.... for real?, WOW, I just learn something new today(I am not being sarcastic). So is it for stability in conjunction with the vortex?
Thanks!
Carlos
Thanks!
Carlos
Originally Posted by trinydex
no that is totally wrong. ti's there for the expansion, steel expands at a different rate than aluminum when heated. the ridges are there so that the aluminum won't out expand the steel and then pop itself out of the spot crimps.
It's not that I doubt it so much, just that I think a LOT of people on forums tend to spout personal theories as concrete fact.
Evolving Member
Joined: Jan 2006
Posts: 165
Likes: 0
From: Chandler, AZ
Originally Posted by fromWRXtoEVO
BINGO!!! Mystery solved.
Summary:
The bumps on the side of the roof were only made on the aluminium roof on the 2005 Evo 8 RS and MR and perhaps the Evo 9 RS and MR as well. I am happy that I learned something new today
Thanks guys!
Carlos
Summary:
The bumps on the side of the roof were only made on the aluminium roof on the 2005 Evo 8 RS and MR and perhaps the Evo 9 RS and MR as well. I am happy that I learned something new today
Thanks guys!
Carlos
carlos i know for sure the 9rs has the aluminum roof.. cause as you know i have one..
Damn again..
03-06 GSR (With or Without SSL) - steel roof
04-06 RS - Aluminum roof
05-06 MR - Aluminum roof
Aluminum roof weights 8.8 lbs less then the steel roof. It lowers the center of gravity 50mm without lowering the roof.
03-06 GSR (With or Without SSL) - steel roof
04-06 RS - Aluminum roof
05-06 MR - Aluminum roof
Aluminum roof weights 8.8 lbs less then the steel roof. It lowers the center of gravity 50mm without lowering the roof.
it's standard for an aluminum roof to make it stronger. have you ever held a big square piece of thin aluminum? it's very flimsy. now put it in a brake and put 2 bends in it. not so flimsy anymore. they have nothing to do with aerodynamics, just to strenghten the metal.
you people totally don't know how to read. I ALREADY SAID WHAT THE ****ING REASON IS.
it's NOT FOR THE STRENGTH IT'S NOT FOR THE AERODYNAMICS
it's to allow for the expansion of the metals. aluminum expands about TWICE as fast as steel... this would require them to make the aluminum roof TWICE as thick if they did not somehow make an innovation to COMPENSATE FOR THE EXPANSION.
you also can't WELD aluminum and steel together which is why i stated that they used SPOT CRIMPS. how do i know this? BEST MOTORING VIDEO WHERE THEY SHOW HOW TEHY PUT THE ****ING ROOF IN.
STOP ****ING SPECUALATING I ALREADY TOLD YOU THE REASON.
you people are like talkin' about purple hippos and how they make you feel warm and fuzzy inside and you're totally pulling it outta yer ***.
it's NOT FOR THE STRENGTH IT'S NOT FOR THE AERODYNAMICS
it's to allow for the expansion of the metals. aluminum expands about TWICE as fast as steel... this would require them to make the aluminum roof TWICE as thick if they did not somehow make an innovation to COMPENSATE FOR THE EXPANSION.
you also can't WELD aluminum and steel together which is why i stated that they used SPOT CRIMPS. how do i know this? BEST MOTORING VIDEO WHERE THEY SHOW HOW TEHY PUT THE ****ING ROOF IN.
STOP ****ING SPECUALATING I ALREADY TOLD YOU THE REASON.
you people are like talkin' about purple hippos and how they make you feel warm and fuzzy inside and you're totally pulling it outta yer ***.
Originally Posted by trinydex
you people totally don't know how to read. I ALREADY SAID WHAT THE ****ING REASON IS.
Settle down Beavis.
damn you don't know how to read etiher... it's the best motoring international comparing the mr and the gsr. it's OLD. they have some gymkana guy drive the nuts off it and then they throw a big rubber mat on the roof to test the difference again.
Okay trinydex, is almost right but not quite. He is definitely right tho that people speculate things around here as if they are truths...
anyway here is a quote...
"Mitsubishi engineers overcome the difficulty of joining an aluminum roof panel to a steel monocoque body by developing a technique using self-piercing rivets (SPR) and structural adhesives.
The SPR is a structural rivet with a partially hollow shaft that allows it to pierce through the panel without pre-drilling any hole. After piercing the panel, the SPR expands radially into the structural member below. Introducing two longitudinal design beads in the roof panel solved the problem of thermal warping during the paint process, caused by aluminum having a thermal expansion nearly double that of steel. These beads also serve as an eye-catching design element."
from this link (a little past half way down, under weight reduction)
LINK
anyway here is a quote...
"Mitsubishi engineers overcome the difficulty of joining an aluminum roof panel to a steel monocoque body by developing a technique using self-piercing rivets (SPR) and structural adhesives.
The SPR is a structural rivet with a partially hollow shaft that allows it to pierce through the panel without pre-drilling any hole. After piercing the panel, the SPR expands radially into the structural member below. Introducing two longitudinal design beads in the roof panel solved the problem of thermal warping during the paint process, caused by aluminum having a thermal expansion nearly double that of steel. These beads also serve as an eye-catching design element."
from this link (a little past half way down, under weight reduction)
LINK
Last edited by vtsnake; Mar 23, 2006 at 12:27 AM.
Excellent find, thanks vtsnake!
Originally Posted by vtsnake
Okay trinydex, is almost right but not quite. He is definitely right tho that people speculate things around here as if they are truths...
anyway here is a quote...
"Mitsubishi engineers overcome the difficulty of joining an aluminum roof panel to a steel monocoque body by developing a technique using self-piercing rivets (SPR) and structural adhesives.
The SPR is a structural rivet with a partially hollow shaft that allows it to pierce through the panel without pre-drilling any hole. After piercing the panel, the SPR expands radially into the structural member below. Introducing two longitudinal design beads in the roof panel solved the problem of thermal warping during the paint process, caused by aluminum having a thermal expansion nearly double that of steel. These beads also serve as an eye-catching design element."
from this link (a little past half way down, under weight reduction)
LINK
anyway here is a quote...
"Mitsubishi engineers overcome the difficulty of joining an aluminum roof panel to a steel monocoque body by developing a technique using self-piercing rivets (SPR) and structural adhesives.
The SPR is a structural rivet with a partially hollow shaft that allows it to pierce through the panel without pre-drilling any hole. After piercing the panel, the SPR expands radially into the structural member below. Introducing two longitudinal design beads in the roof panel solved the problem of thermal warping during the paint process, caused by aluminum having a thermal expansion nearly double that of steel. These beads also serve as an eye-catching design element."
from this link (a little past half way down, under weight reduction)
LINK
