Turbos don't like heat even though they produce assinine amounts of it. The more exhaust flow you have out of them the better. I have 2.5" outlets on my hybrids and stepped it immediately up to 3" full mandrel bent.
Okay, question: Myth or reality? I've heard that turbos don't like Flowmasters. I forget what about them exactly that turbos don't like, but perhaps that the flow characteristics (since they aren't like the average muffler) create too much backpressure? I'm curious.
flowmasters work on pulse of the cylinder and the turbo takes the pulse and uses it to spin turbo so its no longer a pulse when it hits the muffler
more than likely no, but might still work on twins but since pulse is used up in the spooling of turbo chances are slim
Here's my .02 (actual value may vary). Go with a 3" mandrel bent X-Pipe exhaust system no matter what. It won't hurt a mild 350, and will allow virtually any amount of buildup down the road. Put the mufflers near the rear axle if you want the tone to be mellow. I ran that NA on my car and certainly picked up power over 2 1/4 h-pipe duals with no loss of torque. Anyone who fears torque loss should watch my little cruise video where my car spins the 31x18.5 Mickey-T's through 3 gears pre-turbo. Going with an aftermarket intake is a good idea. If not the X-Factor, I like the Poston S-Divider. If other areas of the engine are upgraded (cam head porting etc) it will pick up power. The fuel distribution will also improve, as will heat dissipation. Lighter weight on the nose is also worth traction via weight transfer if nothing else. This foundation will support nitrous or turbos later at no cost of drivability in the meantime. Last but not least, in fact last but should be first, is gears, converter, and a shift kit. Run the most aggressive gear you can deal with for your normal driving situations. From what I hear you spend more time fighting off import attacks than driving across the country so throw some 3.73's there and be done with it. The shift kit is next, ahead of the converter. It is fast, easy, cheap and really makes a big change in how quickly you can recover from a shift. The converter should be matched to the cam. The GS350-114 by Poston is a great all around cam that ironically has very good specs for a turbo build. If you are going all NA then you might want a hotter cam, but again, the stall will have to be matched to the cam so choose both with great thought. Have fun ripping the "looney tuners" a new one!
find a stock 455 and bolt it in, switch to 3.42 gears and find some traction - that'll go mid 13's easy with tuning. Add headers, converter and intake and yuo're in the 12's
I have a 350 don't now if it is any good. I think the guy said it had a tapping noise. I would be willing to almost give it away. where are you located. I also have A 455 that smoked the bearings. It is not seized. let me know if you are interested.
