yankees

All,

I'm looking for the least restrictive exhaust system for racing (with mufflers) that compares to open exhaust headers for my 72 Cutlass Olds 350. Maybe headers 1 3/4 primaries x 3 inch collector to 3 inch X-pipe and finally dumping into mufflers (DynoMax Bullets or Dynomax 17749's) before or possibly after the axles.

I plan on running a 1972 350 SBO stock internals with only a performer intake, 650 Holley DP, T-350, Old Vega Converter, 3.90 gear with eaton posi, 295/65/15 or 30 inch tall Mickey T drag radials. No other perf mods. Street/Sportsman class car.

What is everyone using on their cars? Again looking for little to no dropoff in ET between open and dual exhaust.

Looking for the Borla collector muffler quiet sound that you see on dragsters.

coppercutlass

i have a 3 inch x pipe and dynomax ultra flow mufflers stainless mufflers. I want 200 for the whole set up it has turn downs at the axle . I am a firm beleiver in an x pipe . on my 72 i run a 2.5 inch x pipe system with hooker aero chmabers with a home made bolt on deal so i can take the mufflers off at the track. I went from straight duals to an x pipe and ran faster than with open headers. That was my experience.

yankees

What headers were u running and what did u use to connect the header collector to your x pipe? Any pics of the exhaust?

coppercutlass

i"ll get some tonight. the use the regular headrr collector ring set up to bolt em. you will neeed ew band clamps becasye the onces it has on collector end ahve holes for 02 sensors. Im running blackjack headers going to some cweramic coated headers i got for free.

TripDeuces

This article has some good info:

http://www.boyleworks.com/ta400/psp/exhaust.html

yankees

TripDeuces,

Thanks for the article. I think 2.5 is a good way to go along with the Dynomax 17749's. Those mufflers are extremely quiet from the videos I've seen.

coppercutlass

You still want me to get pics of the exhaust I have ?

yankees

Please send the pics.

jims2000lt

2" Hooker Super Comps to 3.5" tapered cones to 3" Torque Tech mandrel bent head pipes to 3" Jegs 2 chamber welded mufflers with 3" turndowns.
Never ran with open headers and probably never will.
This exhaust is very light and sonds good too.

kitfoxdave

Thanks for the article Trip!

coppercutlass

here is one it has no rust and the whole system can be taken apart for shipping Btw i have a 3000 stall converter and a 2600-2800 converter im willing to sell.

yankees

Aren't u going to use the exhaust? What part # on the dynomax muffs? How r the muffs connected to the xpipe and do u have any sound clips?

coppercutlass

Im running a 2.5 x pipe i got this on a car i parted out. everything was bearly clamped on

coppercutlass

this is the exhaust im running on my car. you can see the bolt on mufflers i welded my system up. IM running hooker aerochambers.
th one of the exhaust against the wall is just to show length .

olds 307 and 403

If you want the best flowing, start with the American racing headers. I bet they are worth a good amount on a radical engine. I will eventually upgrade my Sanderson headers, focusing on the motor. I need to get the front half done properly, using the 2.5" Hooker cat back from my X pipe back.