slimdawson

At 6'2", I am 180lbs. Pretty damn slim imo.

The car though is a pig, I know. I was disappointed too. I think it is a little lighter now though.

FruityOne

My 89 GTA shipped from the factory at 3,389lbs. Thats with about 3 gallons of gas in it. Add the rest of the tank, another 12 gallons and you get 3,461lbs.

Add 175lbs of me and you get 3,636lbs. Yes, they are heavy, but not that heavy! 4th gens weigh more than the thirdgen, and they have the advantage of aluminum heads, or aluminum motor!

350TPI

And 4th gens have the advantage of fiberglass body parts.Imagine if they were made out of steel like the 3rd gens.They would have definitely been pigs

guywidiroc

Where do some people get their info? My car is nowhere near that weight, it has no ttop, no power seat or mirrors, no spare, and an aluminum LS1 driveshaft. I know it weighs less than 3500 lbs, and its well under. I only run at the track with about 3 gal of gas. I will be going to the track again next weekend with bf drags and a video camera hoping for my 13.49 if the weather works with me. How should i tape it for you nonbelievers. I guess ill show the car upclose, the original tpi motor..then show the runs?? No bs here, so i have nothing to hide. Then im sure some dude that has a sucky 15 sec 305 with an auto, street tires, and a 2.73 rear end will want me to tear my motor down in front of the camera too, then hell believe. Anyone want to watch ill be a lapeer dragway in lapeer michigan next weekend.

mustangmuncher

Maybe you are mistaken that your motor is a 305, maybe its a 350.... no j/k good times man, if ?I ever bought a third gen it would be a 305 5spd car. Good luck at the track next time.

Zepher

The only thing we question is that you state the motor is bone stock with only headers and trapping 100mph.
It's not really rocket science, but simple math, if you have X amount of HP and your car weighs x amount of pounds, then it will only go as fast as the HP allows.
Your 305 stock should have either 220 or 195hp depending on the original tranny that it came with. M5 had 220 and A4 had 195.

And I believe that the T56 ends up weighing more than a 700R4, so if you had a T5 your car weighs more with the T56.

Also, having a lower 60' time usually gives you a lower trap speed.
Look at your slips and you may notice that the ones with a higher 60' have a higher mph.

slimdawson

Out of curiousity, how much hp do you think my car makes? Bolt on LT1/m6 in my 91 RS. Weighed 3660 with me in it with the 305/auto. No carpet but still has front and back leather seats. I trap 112 on motor. Again that is only bolt ons.

Zepher

360 or so at the wheels. Sounds like your car has heads and cam or a 100-125 shot of gas on there. No way a bolt on LT1 should trap that fast. Every bolt on would net you 280-310 at the wheels.

Here is what the HP calculator comes up with for the 305TPI,
Horsepower Results - 1/4 Mile Method

Your Camaro weighs about 3500 pounds and can complete a 1/4 mile in about 13.55 seconds. That means that you've got about 278.06 HP at the wheels, and about 361.48 HP at the flywheel.

mustangmuncher

How could you possibly say that a LT1 running 13.02 has heads and cam, and has 390-410 rwhp?!?! I guess that means my 14.124 (bone stock btw) A4 LT1 has like... 270rwhp? Thats interesting I think, considering it won't happen. Cars with 360rwhp can run low 12's. How do you figure all of this? Thats just ridiculous, figuring by calculators is stupid, use real life occurances.

Zepher

I am going by the trap speed, not the ET. Trap speed is an indicator of how much HP the car has, ET shows how good you launch AND the potential of the car.
I bet your A4 LT1 is trapping around 98-102 mph too, isn't it?

mustangmuncher

100.67 MPH with a 2.297 60ft, ran a 14.124, not a single modification on anything at all. The problem with calculating trap speed to horsepower, is a lot of things effect trap speed, such as the launch (traction). The best way to see the power a car makes would be a dyno, to see how well your car uses that power is the track. Another problem I see with using trap speed to see horsepower is it isnt accurate. I was reading on 3 supras that ran mid 10's with horsepower ranging from 708rwhp to 910 rwhp, all with around the same trap ~140... Trap speed is a good indicator of the power being made, but not overall. I am no expert, but it has been known for LT1's with just bolt-ons run low 13's with traps similar to those. I should be starting my bolt-ons after the season starts in spring, want to max my times on street tires before I begin modifying.

guywidiroc

Maybe my recent dyno run on the 02 z ttop, power everything can help too. It put 323hp to the wheels and 312 ft/lbs, and its an auto with 3.23 gears and stock tires and it trapped at 110 mph (12.73 et) before the tuning....it may trap at 111 now??. What are some other guys dyno numbers and how do they relate to your timeslips.

As for the iroc dyno, i havent done it yet, but i did decode the engine block and its a 305 for sure. Known that for 6 yrs anyway...

mustangmuncher

320rwhp and he trapped 110, perfect example that trap speed is simplya good indicator of power, but things like the area under the curve, as well as torque play factors in trap speed, as well as traction.

Zepher

Supras are Dyno Queens and shouldn't be used as an example. There is an old saying, "What does a 400hp and 800hp Supra have in Common? 12 sec time slips." They have a hard time getting out of the hole and accelerate like mad at teh 1/8th mile.

Trap speed is a very good indictator of how much HP you are making. I am not talking out my ***, I have many friends that drag race and I socialize, talk tech, BS, etc with them.

You should Dyno your car, I bet it's putting down about 260rwhp.

mustangmuncher

I plan on dynoing it before I begin modifying it, and if a stock A4 LT1 puts down 260rwhp the LT1 world will be shaken. I don't think even a M6 has pulled that. But we will see. I know that trap speed is a good indicator or power, I said that in both the last two posts, but other things influence trap speed besides max power, like area under the curve... if a car has a peak of 360 rwhp, but its just simply that a peak, with not much of a even power band, a car with a peak of 340rwhp that has a good area under the curve will trap higher as well as get down the track quicker, at least thats how I would see it. Not trying to argue with you, just trying to learn as much as possible, and the easiest way is to show my opinion and listen to more experienced people respond.

-Eric