big base circle cam in stock elem.

[TILBURG]

The first post was about "BIG BASE CIRCLE" cams. When someone has a minute could you please forward me a spread sheet w/ what the stock base circles are for everything amc,ford,chry.chevy,hudson (you never know) What if you have big power adder like a 4/7 swap cam? And it ends up being the same as a ford would something like that be considered as crossbreeding?How do you tell the car (driver) in say B stock auto that just got his 440,396,427 etc A#S drug down the track by a 2014 302 you have to go home because your base circle is to big.

Exactly!! Great post.

Originally Posted by TILBURG

The first post was about "BIG BASE CIRCLE" cams. When someone has a minute could you please forward me a spread sheet w/ what the stock base circles are for everything amc,ford,chry.chevy,hudson (you never know) What if you have big power adder like a 4/7 swap cam? And it ends up being the same as a ford would something like that be considered as crossbreeding?How do you tell the car (driver) in say B stock auto that just got his 440,396,427 etc A#S drug down the track by a 2014 302 you have to go home because your base circle is to big.

[Dave Gantz]

I don't understand how anyone can think that a cam that doesn't fit in the STOCK bore can be considered legal for STOCK Eliminator. But of course, that ship sailed loooong ago.

[bubski]

Originally Posted by TILBURG

The first post was about "BIG BASE CIRCLE" cams. When someone has a minute could you please forward me a spread sheet w/ what the stock base circles are for everything amc,ford,chry.chevy,hudson (you never know) What if you have big power adder like a 4/7 swap cam? And it ends up being the same as a ford would something like that be considered as crossbreeding?How do you tell the car (driver) in say B stock auto that just got his 440,396,427 etc A#S drug down the track by a 2014 302 you have to go home because your base circle is to big.

Ouch must have hit a nerve here!!!!!!!!!!!!!!!!! If you look at the the first post you will notice that the block in question needed to have the cam bore machined to fit the larger cam. I believe it is common knowledge to say when you upgrade your engine to a {big base circle cam} that you are enlarging the cam bores in the block to accept a larger cam bearing. The good people grinding todays competition cam profiles do all they can to allow the largest base circle obtainable within the limitations of the lobe lift and cam journal diameter.

[Pedigo Perf]

Originally Posted by TILBURG

The first post was about "BIG BASE CIRCLE" cams. How do you tell the car (driver) in say B stock auto that just got his 440,396,427 etc A#S drug down the track by a 2014 302 you have to go home because your base circle is to big.

From a distance if they are smart. Ha Ha

TP

[Tim Lisson]

"big base circle" and 55MM tunnel is two completely different items. I think the person who started this post is referring to modifying his block for 55mm camshaft.

[ron mattson]

Exactly what Tim said, the post was titled wrong
It should have read- Big cam bearing journal cams
Illegal in stock. But with that said, Pedigo has a
Letter to state the opposite, if there is a question
Nhra should post something so everyone can see
Not just a select few. As far as the rule book I
Have never seen where it is legal and if its not
There it's supposed to not be allowed.