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This isn't exactly a BBF question but a topic thats been discussed before. I have been helping a friend run a 565 BBC in a 5.30 Index class. Car weighs about 3000 lbs and we spray it just a little bit to dial in in to the 5.30 index. It will run about a 5.40 on motor. This is a good, well built motor that has performed flawless up till now.
It seems after a basic freshen up of the engine we lost 6-8 numbers on E.T. We are having to spray longer to run the 5.30 index. We have looked over everything trying to figure out where we lost E.T. After looking back in his records he saw where he replaced the exhaust pushrods that were not the same wall thickness as the old ones. This is the only thing that has been changed in the engine from last year. He had concerns about his pushrod size anyway.
Has anyone seen a noticeable loss/gain from this type situation? We are searching everywhere for a problem.
I know it's not a BBF, but there are some great engine guys here, I appreciate any help and advice
It seems after a basic freshen up of the engine we lost 6-8 numbers on E.T. We are having to spray longer to run the 5.30 index. We have looked over everything trying to figure out where we lost E.T. After looking back in his records he saw where he replaced the exhaust pushrods that were not the same wall thickness as the old ones. This is the only thing that has been changed in the engine from last year. He had concerns about his pushrod size anyway.
Has anyone seen a noticeable loss/gain from this type situation? We are searching everywhere for a problem.
I know it's not a BBF, but there are some great engine guys here, I appreciate any help and advice