300 sound

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Jul 1, 2009 | 10:41 AM

387designs

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From: Ct

300 sound

One of my favorite things about driving an american vehicle is the sound, I have the exhaust note pretty dialed (third exhaust I've put on). It is dual 2" off the EFI manifolds y piped into a 40 series flowmaster with a y pipe out into dual 2 1/2 exit pipes. Ive found it sounds best with the smaller pipes building up the back pressure and then resonating out the larger pipes.

Leading to the real question, from tyhe research I've dont there isn't much of a gain with the chevy rockers, but will they give the truck a loopier idle sound?

Thanks,
Sean

Jul 1, 2009 | 07:39 PM

flipklos

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From: Wahpeton ND

Try the 260 comp grind. The cam will give it a bit more lope. The 252 I got makes it sound like a diesel.

Jul 1, 2009 | 08:25 PM

dustybumpers

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From: In my own world

don't really make it lopy, but makes a big improvement in how it runs

Jul 1, 2009 | 08:35 PM

flipklos

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From: Wahpeton ND

Dusty, Are you talking about the cam or the BB rockers?

Jul 1, 2009 | 08:39 PM

dustybumpers

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From: In my own world

Quote:

Originally Posted by flipklos

Dusty, Are you talking about the cam or the BB rockers?

talking about useing the 6cyl chevy rockers.

Jul 4, 2009 | 11:31 PM

optikal illushun

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From: Coal Region

unless its a pre-85? engine that wont work.

Jul 5, 2009 | 09:21 AM

dustybumpers

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From: In my own world

Quote:

Originally Posted by optikal illushun

unless its a pre-85? engine that wont work.

don't know where it changed, but you can put in screw in studs, and convert to adjustable rockers on the ones that didd'nt come that way

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Jul 5, 2009 | 01:19 PM

Harte3

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From: Spokane, WA

If you are building back pressure you are going backwards. The desired dynamic is velocity, not back pressure.

The Chebby rocker swap is usually used with a stock cam to get a little more lift and replicates a mild RV type grind but at about $50 mol for the Chebby rockers, the ROI is not bad vs the cost of a cam.

A mild port/polish and port match on the head and manifolds even on a stock unit produces fairly decent results and is necessary to get optimum results from other modifications like cams, 2v or 4v carbs, EFI manifolds or headers, etc.