Jonty

Just trying to work out if exhaust baffles really are a hindrance or whether my mind's just playing tricks on me.

Before I had my standard back box removed yesterday, my Classic UK Turbo felt as though it had a sock or banana blocking its waste pipe if I gently accelerated early on in the rev range. If I nailed the fun pedal I couldn't really feel it too much but I've always thought my wife's UK '01 WRX was slightly quicker and more eager (where she has a WRSport box fitted.)

Now armed with my newly acquired Hayward & Scott rear muffler, I'm sure the problem has gone. Would the design/baffles inside a standard exhaust really cause such a disruption to the escaping gases..? It certainly feels like it, but I'm not 100% sure if the H&S box is straight through.

Whatever, I'm not complaining.

Ta.

Jonts.

AvalancheS8

H&S backboxes are straight through, shine a torch up it and you'll be looking right through the backbox. When I added a backbox to my otherwise standard car it certainly sounded better, but I wouldn't say it felt perceptibly better. It's generally reckoned that a back box is worth at most 5bhp, which is not really enough to feel.

Jonty

Thanks for the reply. My butt dyno certainly can't feel any difference but there's definately less hesitation than before, and looking at the picture within the link below, it's hardly a suprise.

http://auto.howstuffworks.com/muffler3.htm

Hmmm, an extra 5 or so bhp eh..? Just need to get my blue washer jets, fluffy dice, and the car lowered by 2 ft and I'll be out-running McLaren F1's in no time! ;o)

Jonts.