The 10 Bolt Worries
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Joined: Aug 2003
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From: Indiana
The 10 Bolt Worries I have a 2001 Formula with 23k on the odometer. It is an A4 with the stock 10bolt and 3.23 gears(?). I have added a Magnaflow muffler, and a TSP lid with the Holley Powershot filter. I don't race my car, but I do get on it sometimes.
Question #1. Should I be worried at all with breaking my rear end?
Question #2. Coming from the factory, did this car have the aluminum driveshaft or steel? Which one is better?
Question #3. I know a dyno is the only true accurate way to test, but around what rwhp should I be at?
I know the last question doesn't really belong, but what the hell. Thanks in adavance for the help.
Ed
Question #1. Should I be worried at all with breaking my rear end?
Question #2. Coming from the factory, did this car have the aluminum driveshaft or steel? Which one is better?
Question #3. I know a dyno is the only true accurate way to test, but around what rwhp should I be at?
I know the last question doesn't really belong, but what the hell. Thanks in adavance for the help.
Ed
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Joined: Aug 2003
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From: Lexington, NC
#1, no you shouldnt be worried unless you do hard launches, but with your mods you shouldnt worry about it.
#2, Your car has an aluminum driveshaft, the aluminum driveshaft is slightly better than the steel b/c its not as heavy which means you dont have as much rotating mass which means you will prob dyno 2-3 more hp than a car with a steel one.
#3, I thick you should dyno somewhere b/t 310-315 RWHP, depending on the weather etc. Get a catback and you will see the #s ioncrease.
Good Luck man
WeS
#2, Your car has an aluminum driveshaft, the aluminum driveshaft is slightly better than the steel b/c its not as heavy which means you dont have as much rotating mass which means you will prob dyno 2-3 more hp than a car with a steel one.
#3, I thick you should dyno somewhere b/t 310-315 RWHP, depending on the weather etc. Get a catback and you will see the #s ioncrease.
Good Luck man
WeS
#1, No you shouldn't worry about your rear end if you don't launch it hard. They are pretty good for NORMAL use. YES I said NORMAL use.
#2, You're car has an aluminiun drive shaft. It is lighter than steel.
#3, I would say 320 rwhp.
I would not really worry to much, the ten bolt can take some beating from your mods. M6 cars, are the ones that should worry.
#2, You're car has an aluminiun drive shaft. It is lighter than steel.
#3, I would say 320 rwhp.
I would not really worry to much, the ten bolt can take some beating from your mods. M6 cars, are the ones that should worry.
Ah heck....my 330+/-rwhp with M6 w/ 4.10's and Kumho Ecstas Supras wouldn't hook anyway, and I get into it a lot. It's when you get close to 400rwhp with sticky tires that things get real bad (or a pot hole on a hard launch).
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Joined: Nov 2001
Posts: 9,246
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From: Troy, AL
One correction here...
If your car came with NON-speed rated tires, you have a steel shaft. That's a long shot since MOST 3.23 geared cars came with speed rated tires but it is a possibility. Just grab a magnet and see if it sticks. It won't be attracted to aluminum.
Stock rears behind A4 cars hold up pretty well. Usually into 10 second territory.
If your car came with NON-speed rated tires, you have a steel shaft. That's a long shot since MOST 3.23 geared cars came with speed rated tires but it is a possibility. Just grab a magnet and see if it sticks. It won't be attracted to aluminum.
Stock rears behind A4 cars hold up pretty well. Usually into 10 second territory.
