Race mufflers

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gmracing355 · #1 Post by **gmracing355** » Sun Jul 27, 2008 11:38 pm

I was wondering what kind of mufflers everyone is using on thier cars. Right now I have 2 chamber 3 inch flowmasters run to the front of the rear but my friend says they are slowing the car down. I dont want to run open headers but he told me to run the dynomax race mufflers.These are what he recommed.
http://store.summitracing.com/partdetai ... toview=sku
Thanks,Greg

Bob West · #2 Post by **Bob West** » Mon Jul 28, 2008 5:38 am

Dynomax Ultraflo ovals or bullets.

supernova · #3 Post by **supernova** » Mon Jul 28, 2008 5:42 am

I'm not a muffler expert but you can uncap it and see if the car goes faster. If it does go faster then it might be that the mufflers are wrong ( too restictive ) or the exhaust it too small. If it doesn't pick up, what you have might be ok or too big.

ytnova · #4 Post by **ytnova** » Mon Jul 28, 2008 9:13 am

4" race bullets here, but they are kinda loud wot.

68 chevelle · #5 Post by **68 chevelle** » Mon Jul 28, 2008 6:05 pm

ytnova wrote:4" race bullets here, but they are kinda loud wot.

Same here.

dadnova · #6 Post by **dadnova** » Mon Jul 28, 2008 6:12 pm

What cu. inch engine and at what RPM are you running it.

If you have 1 1/2 headers, area is 1.75" per pipe X 4 (pipes per side) = 7" area of possible air flow.

One 3" pipe = 7" of area air flow

Just the math.

Not all headed pipes are pushing air at the same time as well. Just somethiong to think about

hugger73hatch · #7 Post by **hugger73hatch** » Mon Jul 28, 2008 8:21 pm

3" race bullets here. I went from 3" 2 chamber flowmasters with pipes turned down behind the axles. Definitely a lot louder, and I have not seen much improvement in ET, which surprised the hell out of me. But then again, I haven't ran in any good air really this year, so not really comparing apples to apples.

sc racing · #8 Post by **sc racing** » Mon Jul 28, 2008 8:24 pm

Ran the Dynomax 3" bullets bolted to the header it takes the "snap" out of open headers at idle but not much difference wide open. Never ran without them so I have no et comparison.

ccjohn2 · #9 Post by **ccjohn2** » Sat Aug 09, 2008 8:37 am

4" bullets. No loss of power and lite weight in comparison to the flowmasters.

rustbucket · #10 Post by **rustbucket** » Sat Aug 09, 2008 9:42 am

1 7/8 tubes, single chamber flowmasters, 3 1/2 aluminized pipes just behind frontseats with turn downs.

waterdog · #11 Post by **waterdog** » Sat Aug 09, 2008 11:09 am

x2 as rustbucket for the track, 3" to the rearend for the street. With my old 350 there was almost 3/10 difference, haven't done a comparo with my new 408.Walt

#12 Post by **John_Heard** » Mon Aug 11, 2008 2:08 pm

4" Vibrant Stainless - they sound pretty good and light

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