Is there a big difference going from stock to mandrel bent 2.25" piping instead of going with 2.25" piping that is not mandrel bent?
From what Rob from Extreme Muffler told me was that mandrel bent pipes only make a diff if no cat is needed. That as soon as you run a cat any gains from mandrel bending is blown away completely.
Now I'm sure you'll get other answers but my sorce has been doing custom and hi-performance exhaust systems for well over 20 years so hes what I'd call an expert.
Yes he also builds his own cars so he does know about them.
Semper Fi SAINT. May you rest in peace.
thanx for the prompt response man
No prob. So what way are you thinking of going? 2 1/4 or 2 1/2.
Semper Fi SAINT. May you rest in peace.
You stayin n/a? or gonna boost it? I'm thinkin of the G.M. blower so I'm going with 3 inch myself.
Semper Fi SAINT. May you rest in peace.
jackalope ( a.k.a. the prick ) wrote:You stayin n/a? or gonna boost it? I'm thinkin of the G.M. blower so I'm going with 3 inch myself.
that's pretty big unless you intend on making over 275 whp. Which... I'll give you the benefit of the doubt. Best of luck in your project. For an n/a application you want to stick with 2.25 piping with a cat. If you go boost, you really want to move up to 2.5 (no cat is best if you can get away with it) and if you run more than about 8 to 10 psi then I'd move up to 3" piping... with no cat. If you try to run 2.5 or say 3" piping without boost, say goodye to your low end torque and say hello to obnoxious loud raspy noises.
I was a retard, and now I'm permanently banned.
Oh god I wish I could hit 275 but I'm realistic and I seriously doubt I will. But 225 isn't too far of a strech. I know 3 inch MAY be a little over kill but I had it on my last car and loved the deep throty sound it gives. I figure between the blower and some cams it'll sound like a baby 350
Anyway thats what I'm shootin for. And thanks for the support
Semper Fi SAINT. May you rest in peace.
jackalope ( a.k.a. the prick ) wrote:Oh god I wish I could hit 275 but I'm realistic and I seriously doubt I will. But 225 isn't too far of a strech. I know 3 inch MAY be a little over kill but I had it on my last car and loved the deep throty sound it gives. I figure between the blower and some cams it'll sound like a baby 350 Anyway thats what I'm shootin for. And thanks for the support
you can get that deep throaty sound by having cams, a 2.5" exhaust with a resonator and no cat...
I was a retard, and now I'm permanently banned.
Unfortunatly I need the cat so oh well.
Semper Fi SAINT. May you rest in peace.
jackalope ( a.k.a. the prick ) wrote:Unfortunatly I need the cat so oh well.
Do they really check in your neck of the woods? Here they just check to make sure the doesn't throw codes. Thank god for O2 Sim's!
I was a retard, and now I'm permanently banned.
Yup. Mirror on a stick, Damn emisions ! Damn, damn, damn, damn, damn !!!! This is another reason for thinking 3 inch may be better once I boost it.
Semper Fi SAINT. May you rest in peace.
jackalope ( a.k.a. the prick ) wrote:Yup. Mirror on a stick, Damn emisions ! Damn, damn, damn, damn, damn !!!! This is another reason for thinking 3 inch may be better once I boost it.
So they will let you have boost and a 3" exhaust on a four cylinder... as long as it has a damn cat.... 
I was a retard, and now I'm permanently banned.
Yeah you can do anything you want here as long as #1 You keep your cat & #2 do not
tamper with ant other emision stuff. Cats are the biggie here tho as they really don't know what each and everycar actualy rolled off the line with. Actualy I just picked up a
2 1/2 inch Magna Flow high flow cat for a whole $40.00 brand new still in the box so it looks like I'll be going with 2 1/2 anyway. But what do you guys think about no resanator? Will that give it the angry bumble bee sound that I dread so much?
Semper Fi SAINT. May you rest in peace.
probably. I don't see any reason NOT to buy a resonator
15.891 @ 88 mph stock, still getting @!#$ty launches...
Summit carries the Thrush Magnum Glasspacks for $21.88(+S&H) for the 28" long one. It will work as good as any resonator. It has the 2 1/2" perforated core, so you won't lose any power and will quiet you down real well.
without a resonator, it will most likely sound like a combination of a dumptruck and a waterbong
I was a retard, and now I'm permanently banned.
Well resonater it is then. I'll let you guys know how it turns out thanks
Semper Fi SAINT. May you rest in peace.
