Race Weight Reduction - REAL WEIGHTS

[HarrisRacing]

Well I figure it's time to start my contribution here, so I'll start with my race-prep on my 1991 MR2 turbo racecar project. It should be noted that I am NOT classing this car for anything other than "time-attack" and lapping days (no fender-to-fender rules are followed). These are ACTUAL weights that I have removed from my car measured with a digital bathroom scale (me holding part, and then not holding for EACH part to reduce errors) and this will remain a running list.

The order that I have chosen to remove my parts are to do all of the "free" parts first and then the "cheap" ones and finally the "expensive" ones. I haven't really gotten to the expensive ones yet, so bear with me...this will be updated frequently.

If a value is missing, I will fill it in later. I have also included the excel file of numbers I have been compiling.

NET LOSS TO DATE: 356 lbs

REMOVED WEIGHT
Description / Weight / QTY / Total
Stock Exhaust / 75 / 1 / 75
Wing Center / 13 / 1 / 13
Wing Sides / 1.5 / 2 / 3 /
Spare and Jack / 31.5 / 1 / 31.5
Ant. & trunk hinge / 4.5 / 1 / 4.5
Heat shields and bolts / 4.5 / 1 / 4.5
trunk carpet / 5 / 1 / 5
spare tire plastic ad holder / 2 / 1 / 2
stock intercooler / 6 / 1 / 6
intercooler piping / 7 / 1 / 7
AC comp, bracket pulley, IC fan / 26 / 1 / 26
Cruise control and bracket / 3 / 1 / 3
Cut off metal plate behind muffler / 3 / 1 / 3
stereo / 30 / 1 / 30
floor mats / ? / 1 / 0
Car floor carpet / 11 / 1 / 11
back wall carpet / 11 / 1 / 11
head lights (assy) / 6 / 2 / 12
mirrors / 7 / 2 / 14
fog lights / 2 / 2 / 4
front bumper support / 17.5 / 1 / 17.5
rear bumper support / 13 / 1 / 13
engine deck lid plastic / 14.5 / 1 / 14.5
engine deck lid metal / 6 / 1 / 6
T-tops / 10 / 2 / 20
floor sound deadening tar (each side)/ 6 / 2 / 12
wipers and bracket (not motor) / 2 / 1 / 2
A/C condensor / 8 / 1 / 8
Ebrake Handle / 4 / 1 / 4
under-trunk heat shield / 5 / 1 / 5
Airbag / 4 / 1 / 4
Back window / 7 / 1 / 7
Side glass with frame (triangular) / 3 / 2 / 6
back window fiberglass surround / 4 / 1 / 4
Cut out bumper parts / 2 / 1 / 2
TOTAL 390.5

ADDED WEIGHT
Description / Weight / QTY / Sub
SSAC Intercooler kit / 15.5 / 1 / 15.5
SSAC downpipe / 8 / 1 / 8
new exhaust / 10 / 1 / 10
Back window (impact acrylic) / 0.5 / 1 / 0.5
Side window (impact acrylic) 0.25 / 2 / 0.5 /

TOTAL 34.5


ACTUAL WEIGHT
Description / Weight / QTY / Sub
Door Panels / 5.5 / 2 / 11
Stock Seat (each) / 34 / 2 / 68

You can see pics of the build at Putfile - Welcome to my homepage!

Thanks,
Patrick Harris

[MRtuned]

so you're running without the t-tops on?

[HarrisRacing]

I wil lbe making either a fiberglass or carbon top (or tops) to make the car a coupe. It's legal (and safe) to have the tops off, but only if you have wrist straps. Seems that the less glass that can bust in your face is better.

Patrick

[mr2greasemonkey]

Hey that's pretty good, i'd like to know how far you get down to. Last time i 4 corner scaled mine it was 2177 lbs.

[Sylvan]

75 pounds for stock exhaust??? holy crap. Is this including the Cat/DP etc. or just cat-back. And what was the exhaust that you installed that was only 10 pounds? Custom?

[HarrisRacing]

Originally Posted by Sylvan

75 pounds for stock exhaust??? holy crap. Is this including the Cat/DP etc. or just cat-back. And what was the exhaust that you installed that was only 10 pounds? Custom?

Yep the WHOLE stock exhaust including downpipe, 02 elbow, B ppipe, catback, and hangers weighs 75 lbs. I installed the SSAC downpipe (8 lbs) and made my own 3 foot long 2.5" exhaust (10 lbs) including flex section, 2.5" mandrel bends and some straights.

I also am starting to get crazy with it. Look at my idea of cutting the back off of the car since there is already another firewall back there...

So I guess this might turn into the "how to turn your MR2 into an Ariel Atom" thread soon.

Thanks,
Patrick

[toysrus]

[NewForm]

^ thats funny

[HarrisRacing]

I can't believe someone beat me to it...great minds think alike I guess.

I mean it's a $700.00 racecar, why not?

Patrick

[toysrus]

I have had the car for 6 years now and the goal was an FTD autocrosser.....it has lost approx 600 lbs and the motor dyno'd 105 whp....took it to the drags for the first time last week and managed a 14.7 @ 90.1 mph. Better still my 1/8 mile time was better than the Camaro SS I was running against (he ran a 13.3 quarter)

[DavidV]

Awesome... thanks for posting this list.

-- DavidV

[VeilsideMR2]

sick... thnx for the list

[splashnatz]

anybody any more to add to this ? amazing when you see how much some of the stuff weighs !

[HarrisRacing]

I finished the cage and seats and things. Still working on the list and will corner weight the car on Dec 8th if the paint is done.

Current progress.

Putfile - Welcome to my homepage!

Thanks,
Patrick

[MR2SW22]

Originally Posted by splashnatz

anybody any more to add to this ? amazing when you see how much some of the stuff weighs !

i have a few things that i might be able to add for reduction. i see you put that you removed the stock air bag, well if you look behind the sterio there will be a huge ECU looking thing that has a huge heavy wires going into it, i believe it was heat shrink wrapped yellow. it's the air back sensor ecu, could eliminate 2-3lbs. i did this on my all-trac also and installed a ST-185 rally momo steering wheel. i lost a lot of weight with the stock air bag and ecu gone. also i dunno if you listed it or not but there is a heavy rubber/metal piece that is located on the top part of the rear cross-member bar, might be about 2lbs. i think it's a stop piece incase the motor flexed low enought to hit the cross member, but without 2000hp i don't think that will happen. i'll find some more soon if i can because im looking at doing similar reductions.

[HarrisRacing]

I actually did pull the airbag ECU...I have to check and see if I included it on my paper copies that I was making while weighing things. The rubber / metal part you are talking about IS included in the exhaust...sorry to not call that out.

Waiting on the car to come back from paint and I will let you guys know what some final values are.

Thanks for the additions.

Patrick

[MR2SW22]

Originally Posted by HarrisRacing

I actually did pull the airbag ECU...I have to check and see if I included it on my paper copies that I was making while weighing things. The rubber / metal part you are talking about IS included in the exhaust...sorry to not call that out.

Waiting on the car to come back from paint and I will let you guys know what some final values are.

Thanks for the additions.

Patrick

what is the orignal weight for our cars? i bet the turbo model with power everything is a little more wieght than a non-turbo 5-speed with manual everything...

[mthreat]

Originally Posted by MR2SW22

what is the orignal weight for our cars? i bet the turbo model with power everything is a little more wieght than a non-turbo 5-speed with manual everything...

My 95 turbo with power everything, t-tops, and 1/3-tank of gas, weighed in at about 2920 lbs, details here: Curb weights of various MR2 years and models?

[Raptor13x]

Great thread, and right up my alley. I'm thinking I'm gonna get back into finishing my 2 this year.

[mopwer]

Originally Posted by mr2greasemonkey

Hey that's pretty good, i'd like to know how far you get down to. Last time i 4 corner scaled mine it was 2177 lbs.

Anyone else get their car down past this in stripped race trim? I'm trying to figure out what to build for a race car. Thanks.

Greg