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Forum: HoseHeads Sprint Car General Forum (go)
Moderators: dirtonly  /  dmantx  /  hosehead


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Topic: My theory on Larsons high tailpipe Email this topic to a friend | Subscribe to this TopicReport this Topic to Moderator
Page 2 of 2   of  25 replies
YungWun24
August 16, 2024 at 11:21:37 AM
Joined: 01/19/2009
Posts: 1254
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Reply to:
Posted By: Cool Trikes on August 16 2024 at 10:49:35 AM

We ran them that way back in the 90's.   Nothing new to see here.

I showed my GF all the hoopla about Larson's exhaust and how Silva was so cutting edge doing it.  Then I brought out a pic from 1998 with my car having mufflers like that.  I guess years ago some of of did some amazing things.......or just had common sense.

I never understood blowing hot exhaust on the tires or components.

I  personally always ran mufflers even on tracks where you could run open headers.  I always wanted to hear when they were coming.up on me. With open headers your car is too loud to hear the other cars.



I think most of the racing community doesn't consider htis cutting edge but not afraid to do something different. As Justin noted on Dirtrackr, it could be just to get people talking.

Paul won't do interviews, so here we are, all talking about it. Besides he's got a good looking wife to talk to, and now baby. 

Good point on  the open headers being louder, and therefore you could hear a car sooner.

 


Keep It Real

beezr2002
August 16, 2024 at 01:10:53 PM
Joined: 04/21/2017
Posts: 1174
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With winged cars there is an areodynamic theory that has to do with hot air molecules versus cold air molecules and how they affect wing performance. Something like the dense cold air molecules on the top of the wing surface over power the less dense hot air molecules under the wing surface creating more downforce. It's a theory but I don't know if it is part of Larson's winning equation. I'm sure no team today would run a distractive piece on their car to keep other peoples mind occupied while trying something new. That last sentence was sarcasm for those who ........well you know.



kossuth
August 16, 2024 at 06:42:19 PM
Joined: 11/02/2013
Posts: 538
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Reply to:
Posted By: linbob on August 12 2024 at 05:50:02 PM

Alot of heat goes out a tailpipe.  This really heats up shocks.  Teams spend alot of time on shock dynos.  Heat changes the readings alot.  I think the exhaust outlet being high is to keep shocks cooler.  You also do not want your tires to get hotter than needed.  This keeps tires cooler.  My guess is you will see more cars try this.  



There is an old saying that I'm basically paraphrasing here.

If you don't want your competition to see what your really doing, put something outlandish out there that means nothing For them to chase. That way they don't look at the rest of the car. 




jdfaster
August 19, 2024 at 03:01:10 PM
Joined: 10/16/2015
Posts: 34
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Rico ran the high tail pipes this weekend at Tulare and Handford.

Asked a crewman for Rico, what the pepes do.  He said it keeps the shock 50 degrees cooler when they come off the track.  I asked if he thought it created more down force, he said he had no idea.  How hot do shocks get ?

Interesting Rico's and Silva 57 were pitted next to each other at Handford, a lot of brain power between those teams and I think Rod Tiner was helping.

 

Curious, are there any downsides to the pipes, more fumes in the cockpit?   WOO, HL and USAC should decide quickly if they want to have these exhaust/pipes.  Over night this would obsolete for all other competitive teams their current pipes, but I guess cutting and welding is no big deal.

 



RodinCanada
MyWebsite
August 19, 2024 at 07:06:31 PM
Joined: 07/24/2016
Posts: 1789
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This idea of upward exhaust was discussed about 18 months ago briefly if i remember correctly. Same thig was said then, cooler shocks and tires. I was surprised then that it didnt catch kn if there was a large advantage.


Even though I may not know you, I 
care what most of you think!

Johnny Utah
August 19, 2024 at 08:29:48 PM
Joined: 07/15/2014
Posts: 1255
Reply

Lucas Wolfe's pipes at the Grove a few years back were cool. I believe he had to take them off after hot laps because they were a "safety issue".





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