Mufflers on racecars

[crossbonesdennis]

I started this thread to get the muffler topic out of the "Early news about the state of the track" section.

Muffler technology has come a long way since the 90's. IMO the original NHRA muffler rule was simply a way for NHRA to make money for a major sponsor. When the rule first went into effect, only mufflers from one manufacturer were accepted. One that had full page ads in National Dragster. Imagine that.

The comment on another thread was the track in Iowa is limiting themselves to street cars with the possible muffler rule. There are mufflers on very fast cars. Look at all the dragsters that run Borla's or similar mufflers.

[sg3526]

I ran Dyno Max Silver Bullets on my old 96 Monte Carlo. Actually liked the way it sounded and I only lost a couple of thou in ET, but I haven't ran a Muffler of any type since 1999 and no one has ever said a word to me about it. If I remember correctly I think Gateway used to put up a little extra money to the winner of Super Pro if you had mufflers and a diaper on your car.

[crossbonesdennis]

Maybe with mufflers, the track in Iowa won't have to abide by early closing times like Ronnie apparently agreed to.

After some discussion back and forth, it was ultimately decided that there would be set closing times with some allowances for extenuating circumstances, to be used if they were of adequate cause - weather, accident, and track equipment failure only.

On Wednesdays the drag strip must shut down at 9 pm, regardless of any special situations, on Fridays and Saturdays the scheduled closing time is 10 pm with allowances up to midnight if necessary, and scheduled closing on Sundays is 6 pm with allowances to 8 pm if necessary.

montgomery.countynewslive.com//?q=content/dramatic-race-approve-drag-strip-completed-without-fanfare

We changed fuel and added Vortex cone inserts to my car. It really liked the change. It's way more consistant now.

[bud SE/JF 5821]

sg3526 : I know what you mean nhra (Tech)told me to put Baffels in mine also and in one pass I melted them inside of the collector, so off they came and the Zommies went back on and I have never been ask again, and that was in 1997 at Pomona, winston finals.

[slingshot383]

Yes, there has been a lot of advancements in muffler technology over the years, but it still has it's limits to volume of airflow. A blown, supercharged, turbo'ed, or fuel burning engine has a different requirement than a naturally asperaited engine. What works on one combination might not on another.