Stripping weight out of the car is like free horsepower. Hell, it's better than free horsepower, because in addition to improving acceleration, it also improves braking and cornering.

At this point, any change I make to the car is with the intention of making it a faster autocross machine. My car is no longer a daily driver. I'm already driving the car fast enough to have realistic goals of a good finish at the top levels of autocross competition. The car is near the HP limits of the stock turbo and injectors. At this point, the primary things I want are less weight and more tire.

 

wouldn't taking out the rear weights upset the already not so great weight distribution?

i've been trying to figure out how to get rid of some weight in the front, and haven't really been caring about the rear...

 

yeh, but at the same time you do play with your weight distribution, huh?

You're right, if you go autocross all the way, I think you should strip your car naked, but if you do it once in a while, that's ghetto, racer.

 

one thing that sux is rear weight reduction isnt as good as front cuz we already have 60/40 distribution...

 

Weight distribution can be tuned around to a large extent, especially on an AWD car.

I can already induce crazy oversteer or terminal understeer just by changing shock settings. If that's not enough, I can change spring rates or sway bars to get large changes in weight transfer. Unlike some pony car guys who autocross with a heavy spare tire and a heavy muffler just to get some weight on the rear tires, I don't have a problem with straight-line wheelspin.

I'll take the weight reduction anywhere I can get it, and then tune the suspension to match.

 

how much do you weight jbrennen? lol. you dont have a eating disorder or anything do ya?

like starve yourself for couple of weeks before the track day. lol

 

Trade your EVO in on a Lotus Elise. That will save you at least 1200 lbs. LOL

Engine: Toyota supplied, 4 cylinder, dohc 4 valves per cylinder with variable valve timing and lift

Capacity: 1796 cm3

Bore/Stroke: 82.0 mm / 85.0 mm

Maximum Power: 190 hp (141 kW) @ 7800 rpm (DIN 70020)

Maximum Torque: 138 lb ft (181 Nm) @ 6800 rpm (DIN 70020)

Compression Ratio: 11.5 : 1

Fuel tank Capacity: 10.5 U.S. gallons

Gearbox/Clutch: 6-speed close ratio with single dry plate clutch

Ratios -

First: 3.17:1

Second: 2.05:1

Third: 1.48:1

Fourth: 1.17:1

Fifth: 0.92:1

Sixth: 0.81:1

Final drive: 4.53:1

Reverse: 3.25:1

Technical Data

Wheels: 8-spoke cast alloy

Front - 5.5J x 16, Rear - 7.5J x 17

Tyres: Yokohama Advan Neova AD07

Front - 175/55 R16, Rear - 225/45 R17

Performance

0-60 mph: 4.9 sec, 4.7 sec (Sports Pack)

0-100 mph: 13.0 sec

Standing 1/4: circa 13.6 sec

Top speed: 150 mph

0 - 100 mph - 0: circa 17.5 sec

100 mph - 0: circa 85m

Fuel consumption: to be finalized prior to launch

Curb weight: 1975 lbs.

 

I thought those tyres were illegal to use on the street since they weren't approved by the DOT. Guess you learn something new every day huh? And aren't those the tyres used in that advan drifting clip? (the 22 min clip around mobara twin circuit... some ppl here have seen it).

 

I still have a full interior and my Evo weighs 3020lbs with 3/8 tank of gas.

 

Well, in the spirit of this thread, perhaps you should elaborate, doncha think???

Where do you think you picked up weight savings?

 

Well you have a lot of the same things covered that I do.

BR Turbo Back with test pipe.
JIC FLT-A2 Coilovers
17x9 FN01R-C
Ti Strut Bar
10lb Battery
No trunk lining.
No Spare or jack
I know I'm forgetting something.

I removed some small pieces in the car that were not important. For example, there is a piece of metal on the steering column that may weigh 2lbs. It is under the plastic trim and is useless as far as I can tell. I took some stuff out like that.

I weighed the car when i bought it with 3/8 tank of gas and it weighed 3240lbs
http://www.geektron.com/evo/pics/6-28-3/weigh/

The 3020 is from corner balancing it about a month ago. I need to go back to the original truck scale to verify because I don't se how I lost 220lbs.

 

maybe your turbo back is lighter than the stock.

i think you could save a lot of pounds on your exhaust components.

 

The BR turboback that both instigator and I have is pretty darned light to begin with. That's why I bought it over other exhausts, because it was so light. I'm running (and weighed the car) with a catalytic converter; running the test pipe (which I already have but have never installed) would probably drop between 5-10 pounds.

To instigator, we have the same coilovers and the same wheels. The lightweight battery will be coming soon. I guess we think alike. Thanks for the elaboration.

 

I guess so. Removing the cat will definitely get you closer to where mine is. If only mine handled like yours. It's good to see that someone else was able to drop similar amounts of weight without turning it in to a tin can.

Care to share your coilover settings?

 

A bit OT, but I started the thread, so I'll allow myself the liberty...

Talk to FT at SELGP...

I don't mean to be coy or anything, but he's helped me with the suspension quite a bit and sponsored me for autoXing, and we don't want to give away the jewels for free, if you get my meaning...

Suffice it to say that the Evo on JIC FLT-A2s can be a practically undrivable mess if you use the wrong settings -- and I do speak from experience. Spring rates, damper settings, ride height, and alignment are all important. Getting the car set up correctly is not quite rocket science, but it's a bit more involved than just bolting the coilovers on and driving. I'm sure that I'm not telling you anything new, but I'm also speaking to the rest of the audience out there.