NHRA 2020 Rule Amendment SS Intakes???

[Rich Biebel]

Good thing pinned studs are still legal......All the racers with them can breathe a sigh of relief...…..LOL

P.S. I did pin a lot of studs but it was at least 30 years ago and a lot more....

[Tom Broome]

Originally Posted by Rich Biebel

Good thing pinned studs are still legal......All the racers with them can breathe a sigh of relief...…..LOL

P.S. I did pin a lot of studs but it was at least 30 years ago and a lot more....

Yeah......about that. I also hadn't pinned any studs in a long time either. Racers moved on to better options.

Then......the Magazines and the Internet "Experts" convinced all these streetcar folks that they needed Vortec heads as a "budget" performance option. You put one more ounce of spring pressure or cam lift on those things. and the studs seem to fly out. Once they see that the guides have to be cut and new seals installed, there's no room in the "budget" for screw-in studs. Now pinning becomes an option again.
P.S. I can't describe how much I dislike pinning studs nowadays.

[bert powell]

Who is going to be the first to take a bbc oval port head and mill 1" off the intake flange of head below the valve cover bolts? Should gain 50-60cc to open up the port.

[bykr]

Originally Posted by bert powell

Who is going to be the first to take a bbc oval port head and mill 1" off the intake flange of head below the valve cover bolts? Should gain 50-60cc to open up the port.

Yeah, after the crying, NHRA backing down leaves the door open for more "innovation".

[bubski]

Originally Posted by bykr

Yeah, after the crying, NHRA backing down leaves the door open for more "innovation".

Once again the "innovators" get there way !! Break out the 85b n mill away !! Can anyone guess whats next to come down the road ??

[Tom Broome]

Originally Posted by bubski

Once again the "innovators" get there way !! Break out the 85b n mill away !! Can anyone guess whats next to come down the road ??

Valve seat replacement is legal now. Chamber modification is legal now. Combine the two options.

That's all I'm allowed to say.

[SSDiv6]

Originally Posted by bert powell

Who is going to be the first to take a bbc oval port head and mill 1" off the intake flange of head below the valve cover bolts? Should gain 50-60cc to open up the port.

Bert,
Do you even know what you are talking about?
Gain 50 to 60 cc's when the rules allow you to port, epoxy and epoxy the cylinder heads?

[Joey Bohannon]

Bert knows exactly what he is talking about! If they cc without the spacer plate there is a ton to gain. And if there wasn't gains to be had in port volume, then why do they make'm. Air speed can still be retained with more volume.

[SSDiv6]

Originally Posted by Joey Bohannon

Bert knows exactly what he is talking about! If they cc without the spacer plate there is a ton to gain. And if there wasn't gains to be had in port volume, then why do they make'm. Air speed can still be retained with more volume.

It is measured without the spacer and not all engines use a spacer. There is a lot more to to volume to make power with cylinder heads.

[bykr]

Originally Posted by SSDiv6

It is measured without the spacer and not all engines use a spacer. There is a lot more to to volume to make power with cylinder heads.

You just don't get it. So why do you think they're doing this? The guy that was doing it obviously thought it had an effect.