Kinda stupid question...
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 9,682
Likes: 3,434
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
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St. Jude Donor '09-'10-'11
Kinda stupid question...
I am building a replacement engine on the side as I get money. Right now I am trying to price out a rotating assembly, which because of my race class has to be just like the factory (I am allowed forged internals for longevity and weight savings). What length rod came in a factory L98? 5.7" or 6"? Other than CNC Motorsports who has good deals on balanced rotating assemblies?
Race Director
Joined: Feb 2004
Posts: 12,517
Likes: 19
I am building a replacement engine on the side as I get money. Right now I am trying to price out a rotating assembly, which because of my race class has to be just like the factory (I am allowed forged internals for longevity and weight savings). What length rod came in a factory L98? 5.7" or 6"? Other than CNC Motorsports who has good deals on balanced rotating assemblies?
I just opened a brand new set of Eagle rods, and they are all .001 small. I have to open them up to fix them. By buying the parts from the machinest, he can tweak them to be perfect. As I said, you get more for your money that way.
Race Director
Joined: Jun 2004
Posts: 13,949
Likes: 705
From: WI
Checking around I went with a local race engine builder. He's is making and has made many of the local engines around here. As above stock is 5.7", consider a 6" or 6.125". Pay close attention to the dynamic compression ratio.
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 9,682
Likes: 3,434
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
Thanks guys. They guy who did my dad's 400 block also checked clearance and such. His prices werent bad.
Ill have to check the rule book but I dont know if I can go to a 6" rod.
Ill have to check the rule book but I dont know if I can go to a 6" rod.
Melting Slicks
Joined: May 2001
Posts: 3,014
Likes: 18
From: Raleigh, NC
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
I thought that was the whole point of the thread. That you HAD to use the factory length rods.
RACE ON!!!
I am building a replacement engine on the side as I get money. Right now I am trying to price out a rotating assembly, which because of my race class has to be just like the factory (I am allowed forged internals for longevity and weight savings). What length rod came in a factory L98? 5.7" or 6"? Other than CNC Motorsports who has good deals on balanced rotating assemblies?
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 9,682
Likes: 3,434
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
I am mostly sure but I am allowed things like forged instead of cast and Im allowed .5 increase in compression and less than 1.5% increase in displacement. It might in there somewhere.
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