Re: period correct tunnel rams
 

47 degrees total at 3000 rpm,possibility distributor retard switch because of 41 degrees at 8000 rpm.

Re: period correct tunnel rams
 

I talked to Joe over on speedtalk and at the time he raced the chevelle it had an unreal for the day 800" lift camshaft so maybe the added timing at lower engine speeds helped it idle better? All I know is 9:50 ets in 1975 was pretty serious! He musta known sumpthin?

Re: period correct tunnel rams
 

I can't say for sure why his tune had that much timing down low, but he may have had the same issue as my 540. Fuel lighting in the pipes required way more timing down low.

Re: period correct tunnel rams
 

Maybe he was using purple avgas?

Re: period correct tunnel rams
 

I am looking for thease air cleaners do you know who made thease style http://i411.photobucket.com/albums/p...ture218725.jpg

Re: period correct tunnel rams
 

They look like they could be Eelco or Helling & Stelling.

Re: period correct tunnel rams
 

----Yup,,,I was going to stay Stellings too......Bill S

Re: period correct tunnel rams
 

Any for sale out there thanks Brent [img]<<GRAEMLIN_URL>>/beers.gif[/img]

Re: period correct tunnel rams
 

maybe Cal Custom? I am surprised that big motor would even start up on those short stacked air cleaners.

Re: period correct tunnel rams
 

Tony Branda has them.