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Author Topic:   mufflers
Dirt Full Roller

Total posts: 56
posted March 12, 2005 10:02 PM  
whats the best muffler for keeping my engine under 95 decibles? (track rule)

Dirt Full Roller

Total posts: 58
posted March 29, 2005 01:59 PM  
No responses?? Anyone have any info on mufflers? What about the IMCA Spec mufflers speedway sells (P/N 917-00609)? Any ideas on how much power these things might cost me?

Any insights would be appreciated!!

Dirt Freak

Total posts: 372
posted March 29, 2005 03:42 PM  
hooker max flows work really well, straight thru design flow good and are pretty quiet, summit has them for $57 each i think, been using mine for 2 years with a 95dbi rule and never had any probs.

Dirt Maniac

Total posts: 120
posted March 30, 2005 08:44 AM  
flowmaster 2 into 1 Y pipe dumped into a dynomax 6" round x 16" long muffler. Ours is 4" in/out. They are a straight through design and do a great job of dampening the sound at a great price.

Dirt Freak

Total posts: 269
posted March 30, 2005 10:50 AM  
If you run a modified, go with Spintech's. Most of the sprint cars in California run them. I use them on my modified and they are compact and easy to fit along the left side driver's compartment.

Dirt Forum Champ
Total posts: 755
posted March 30, 2005 11:51 AM  
My dyno man told me that the IMCA muffler will rob 5hp.

Dirt Freak

Total posts: 205
posted March 30, 2005 09:11 PM  
The spin techs are pretty much the best , and depending on what you are turning for rpm, etc.. you may be able to get away with the smaller sized spintech. its enough smaller to matter in weight and such. if its real close you can fashion a mesh cone and put it in front of the muffler, thats usually good for 1 or 2 DB. The large oval flowmasters are pretty good as well. I use mainly the large flowmasters just so its never close, but I have used the and still have the smaller spintech on one set of headers also. but use turndowns and point them away from the sound guy, that does wonders also.... washington is worse than california on sound.. so trust me these are your only options for a true 95DB...

Dirt Full Roller

Total posts: 58
posted March 31, 2005 08:45 AM  
Only 5 HP huh? That seems pretty reasonable. They do appear to reduce the noise quite a bit. My hearing might be worth 5 HP!! Can anyone confirm this number??

[This message has been edited by rickbraley (edited March 31, 2005).]

Dirt Freak

Total posts: 270
posted April 06, 2005 08:08 AM  
The IMCA spec mufflers wont get you below 95 dbas.They only drop about 3 decibels from wide open.

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