Highest mileage C5 FI first installed?
Thread Starter
Race Director
Joined: Dec 2002
Posts: 10,233
Likes: 21
From: Baltimore suburbs Maryland
Highest mileage C5 FI first installed?
OK so I seriously considered buying a new truck, but at $25k+ additional insurance, taxes, registration etc I thought of the opportunity cost of doing some stuff to the C5 
My 98 has mostly bolt on suspension mods, I have not touched the engine, just a Calloway CAI, X pipe (only cause the stock H pipe broke) and Z06 TI mufflers.
Soooo, looks like one of the most cost effective mods is a supercharger system from A&A or ECS with a good tune. Only trouble is- my car is 8k miles from 200k
as it's my daily driver. I read that one guy here added his S/C at 125k.
Obviously, this will depend on the condition of the engine. I haven't tested its compression or got a baseline dyno reading but was wondering if anyone supercharged their stock engine at over 150k.
Not looking to do anything super crazy, perhaps 8 PSI or so, plus other breather mods like LT headers. If I blow up the engine I'm not super worried about it as I have access to other vehicles but I drive the C5 every day since it's the most enjoyable
Thoughts?
My 98 has mostly bolt on suspension mods, I have not touched the engine, just a Calloway CAI, X pipe (only cause the stock H pipe broke) and Z06 TI mufflers.
Soooo, looks like one of the most cost effective mods is a supercharger system from A&A or ECS with a good tune. Only trouble is- my car is 8k miles from 200k
as it's my daily driver. I read that one guy here added his S/C at 125k. Obviously, this will depend on the condition of the engine. I haven't tested its compression or got a baseline dyno reading but was wondering if anyone supercharged their stock engine at over 150k.
Not looking to do anything super crazy, perhaps 8 PSI or so, plus other breather mods like LT headers. If I blow up the engine I'm not super worried about it as I have access to other vehicles but I drive the C5 every day since it's the most enjoyable
Thoughts?
Safety Car
Joined: Sep 2008
Posts: 4,754
Likes: 167
From: Youngsville North Carolina
Put the SC on, blow up the engine and then build a new motor.
I just did mine at 80k, only a few thousand miles so far though - - I'm sure others will chime in that went SC at higher mileage...
.I just did mine at 80k, only a few thousand miles so far though - - I'm sure others will chime in that went SC at higher mileage...
Burning Brakes
Joined: Sep 2011
Posts: 764
Likes: 19
From: odessa FL
Milage is not as much of a factor as internal condition or how hard it's been beaten on. A car can have > 200k of highway miles, careful use and proper maintenance and be in far better shape than another with 80k of hard use and neglect.
Start with a leak down check.
Start with a leak down check.
Instructor
Joined: Sep 2008
Posts: 107
Likes: 1
From: Tampa Florida
Honestly i wouldn't worry as long as the motor is still good on compression.. i know its not the same.. but my 2001 VW TDI had 468k on it when i Big Turbo'd it.. after the OEM turbo taking a dump on me.. i drove it for another 20k before selling it and that guy still dailys it..
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