Contour Enthusiasts Group Archives Forums Modifications Duratec Performance Bassani system opinions

Originally posted by SVTCuervo:

---

also get the Equal Length'd Brullen Y-pipe, you can't beat the sound or performance.

---

Originally posted by Dan Nixon:

---

Originally posted by SVTCuervo:

---

also get the Equal Length'd Brullen Y-pipe, you can't beat the sound or performance.

---

And I never got an answer as to why Brullen spend so much time equalizing primary tube length. The distance from exhaust port to manifold outlet is much different between front and rear manifolds...so making primary Y tubes equal length virtually guarentees that exhaust pulses will not be matched..

---

Not to hijack the thread but....

Your saying that since the distance from the exhaust ports to the manifold outlets on bank 1 are shorter than bank 2, that trying to equal out the length of the downpipe will effect the factory pulse tuning of the exaust?? This makes sense, but I question why the Brullen Y made 4 HP and 4 or 5 lbs/ft of torque more than the Sho-Shop Y???

Interesting discussion.

I wonder how much of the gain comes from a proper non-crushed flange and how much comes from larger diameter tubing of the downpipe. I would love to see a dyno of a properly optimized stock y-pipe and then the Brullen Y to see if there is any difference.

Originally posted by Ed98.5SVT:

---

1) Your saying that since the distance from the exhaust ports to the manifold outlets on bank 1 are shorter than bank 2, that trying to equal out the length of the downpipe will effect the factory pulse tuning of the exaust??

2) This makes sense, but I question why the Brullen Y made 4 HP and 4 or 5 lbs/ft of torque more than the Sho-Shop Y???

Interesting discussion.

---