98 or 99 C5 - differences??
Thread Starter
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Joined: Jun 2005
Posts: 98
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From: Nr London England
98 or 99 C5 - differences??
I notice that most of the hand held tuners (Diablo...) state 99-04 models only.
I assume that the 98's have a different ECU. Is this true?
Would there be any detriment to buying a 98 over a 99. I plan on a few simple mods at 1st and a Procharger later on. So being able to tune it easily will be a must, but Corvettes are quite specialist over here. Not even sure where I'd take it for tune, my local shop is so appaling I wouldn't let them tune a food mixer!
Also is there an easy way to tell the differences. As in the UK sometimes the years get mixed up and a 1998 car may well end up with a 99 registration. (This is just due to how the import regs work I think).
Any help will be aprreciated,
Ta.
I assume that the 98's have a different ECU. Is this true?
Would there be any detriment to buying a 98 over a 99. I plan on a few simple mods at 1st and a Procharger later on. So being able to tune it easily will be a must, but Corvettes are quite specialist over here. Not even sure where I'd take it for tune, my local shop is so appaling I wouldn't let them tune a food mixer!
Also is there an easy way to tell the differences. As in the UK sometimes the years get mixed up and a 1998 car may well end up with a 99 registration. (This is just due to how the import regs work I think).
Any help will be aprreciated,
Ta.
Heel & Toe
Joined: Nov 2004
Posts: 21
Likes: 0
The ECM/PCM is different, but that wouldn't hold me back from a 98' car. Use LS1 Edit or HP Tuners to do any of your programming. I would actually prefer a 98' for your blower application due to the return style fuel system working better (it's easy to retrofit to the 99'-early 03') to return.
Thread Starter
Advanced
Joined: Jun 2005
Posts: 98
Likes: 0
From: Nr London England
Right. It appears that getting a custom tune for a Corvette may not be that easy where I live. The easiest way would seem to be to take it to a rolling road and use a hand held unit like the Diablo.
1. Is the Diablo unit any good??
2. What can I do to check if its a 98 or 99 ECU? Is there anything visible?
3. If all else fails are there any hand held tuners for the 98 models?
Ta.
1. Is the Diablo unit any good??
2. What can I do to check if its a 98 or 99 ECU? Is there anything visible?
3. If all else fails are there any hand held tuners for the 98 models?
Ta.
Burning Brakes
Joined: Mar 2003
Posts: 966
Likes: 43
From: Lansing MI
Originally Posted by ROJO99
I believe the 97/98 cylinder heads mounted different also from the 99+ LS1's. Someone verify this please.
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Le Mans Master
Joined: Jul 2004
Posts: 7,727
Likes: 7
From: Twilight zone
St. Jude Donor '05-'06
Originally Posted by lost
98s have the largest injector of any C5 including the ZO6, which means you can do a lot more modding before you have to worry about bigger injectors....
Drifting
Joined: May 1999
Posts: 1,976
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From: Herndon Va
Originally Posted by lost
98s have the largest injector of any C5 including the ZO6, which means you can do a lot more modding before you have to worry about bigger injectors....
Yep, in fact one of the first things LPE does to 99's and later is put in bigger injectors.
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Originally Posted by lost
98s have the largest injector of any C5 including the ZO6, which means you can do a lot more modding before you have to worry about bigger injectors....
Ed
Burning Brakes
Joined: Oct 2004
Posts: 925
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From: Johnston, Iowa
Originally Posted by TurboWindsor
The ECM/PCM is different, but that wouldn't hold me back from a 98' car. Use LS1 Edit or HP Tuners to do any of your programming. I would actually prefer a 98' for your blower application due to the return style fuel system working better (it's easy to retrofit to the 99'-early 03') to return.
97-98 cars will have TWO braided metal fuel lines connecting to fuel rail on U.S. drivers side (fuel pressure regulator on rail)...
99-03 cars will have ONE braided metal fuel line connecting to fuel rail on U.S. drivers side (fuel pressure regulator in fuel filter under car)...