sounds like the car is lowered too much by lowering the spring preload and the coil overs are bottoming out. i have seen this happen before on coil over C-4s
spread bore vs Q jet
as carb rebuilder i would tell customers that brought in their holley spread bore for rebuild i would ask if the still had their original Q jet. i told them i would rebuild their Q jet and if they did not like it better than the spread bore i would rebuild the Holley free...
unless you have a race car what is the fasenation with radio deleat in a street drive car and people would think the plates would be worth a kings radsom ??? lot of corvettes it was not a radio delate as the radio was a option that could or could not be ordered
if you have a bike or quad with a translucent brake master cylinder you see the same thing,the fluid turns dark in a short peroid of time. i have heard it come from the mold release used for the rubber parts and that is the same reason your tires turn brown
straight from the corvette owners manual
• GM4718M
Your vehicle's engine requires a special oil meeting GM Standard GM4718M. Oils meeting this standard may be identified as synthetic. However, not all synthetic oils will meet this GM standard. Use only an oil that meets GM Standard GM4718M...
does red line oil meet the GM spec GM4718M for the oil because if not GM can void your warranty. here is the list.http://www.gm.com/corporate/responsibility/environment/maintenance/gm_approved_engine_oils.pdf
they were in big demand before NHRA allowed super stock cars to used ported heads. if you are looking for more performance there are a lot better performing cast iron heads in the after market and from GM
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