Higher mileage mods.
Racer
Joined: Jun 2004
Posts: 260
Likes: 0
From: Phoenix AZ
My car has was modded at 65k and it now has 68-69k on it. I'm pushing 600rwhp with an H/C kit and an A&A D1. I havent had any major breakages, just minor stuff like a bad clutch slave cylinder, leaking radiator reservoir, faulty tire pressure sensors, etc.
Instructor
Joined: Feb 2004
Posts: 124
Likes: 0
From: Nashville TN
90K on a H/C 2003 Z06 450+ RWHP I drive 200+ miles every day (hard). You can't hurt these engines. Now the drive train is a different story. After you do H/C (or any other major power adder) you better be prepared to start fixing broken drive train components. Or just make sure you keep the factory GoodYear rubber and not hook so they will absorb all the shock! 
Racer
Joined: Oct 2005
Posts: 351
Likes: 0
From: Haw River North Carolina
The rear drivetrain isn't designed for drag racing. If you hook it (the tires suddenly grab) it will overload the rear drivetrain and eventually you will find the weak spot. Most likely an output shaft or the rear differential case, depending on how much power you are making.
HTH
HTH
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Melting Slicks
Joined: Aug 1999
Posts: 3,452
Likes: 3
From: Spring, TX
The balancer failed on my C5 at about 100K so a I stuck a new cam in since I had to take the front of the motor all apart anyways due to the damage the balancer did.
On a higher milage car I would go ahead and replace the water pump, oil pump and put in a new hardened timing chain. Don't reuse the old balancer. Get a new stock unit if limited in funds or better yet get an aftermarket one from ATI or ASP. If you don't do new heads then replace the springs, retainers, locks, push rods and valve seals.
I did just the cam and Haltech Stinger intake and picked up 60 rwhp. It has been over two years since then and I am now at 120K miles.
On a higher milage car I would go ahead and replace the water pump, oil pump and put in a new hardened timing chain. Don't reuse the old balancer. Get a new stock unit if limited in funds or better yet get an aftermarket one from ATI or ASP. If you don't do new heads then replace the springs, retainers, locks, push rods and valve seals.
I did just the cam and Haltech Stinger intake and picked up 60 rwhp. It has been over two years since then and I am now at 120K miles.
Go Fast
Joined: Jan 2002
Posts: 1,690
Likes: 91
From: Colorado Springs CO
Originally Posted by gonbad
The balancer failed on my C5 at about 100K so a I stuck a new cam in since I had to take the front of the motor all apart anyways due to the damage the balancer did.
On a higher milage car I would go ahead and replace the water pump, oil pump and put in a new hardened timing chain. Don't reuse the old balancer. Get a new stock unit if limited in funds or better yet get an aftermarket one from ATI or ASP. If you don't do new heads then replace the springs, retainers, locks, push rods and valve seals.
I did just the cam and Haltech Stinger intake and picked up 60 rwhp. It has been over two years since then and I am now at 120K miles.
On a higher milage car I would go ahead and replace the water pump, oil pump and put in a new hardened timing chain. Don't reuse the old balancer. Get a new stock unit if limited in funds or better yet get an aftermarket one from ATI or ASP. If you don't do new heads then replace the springs, retainers, locks, push rods and valve seals.
I did just the cam and Haltech Stinger intake and picked up 60 rwhp. It has been over two years since then and I am now at 120K miles.
Gonebad.....
What cam are you using?
B
Drifting
Joined: May 2004
Posts: 1,904
Likes: 2
From: London(UK)/Troyes(France)
My buddy installed a supercharger on his car at 85000 miles, now it has 93000 miles and it runs flowlessly!
My car has 37000 miles with a Supercharger and today I pushed over 9 PSI of boost. The car is still very reliable!!
My car has 37000 miles with a Supercharger and today I pushed over 9 PSI of boost. The car is still very reliable!!
Instructor
Joined: Jun 2005
Posts: 223
Likes: 0
From: Peoria Arizona
4000 hours at 4000 rpm
even in 4th gear, thats 100 miles per hour for 4000 hours, or 400,000 miles, with full reliability. mods will be no problem, and unles syou stress the engine, 5500+ rpm for long times, no problems.