How restrictive are non-mandrel bends?
All else being equal mandrel bends will always outflow crush bends; that's why I use them!. So if you're going to go the "crush bend" route you'll want to minimize the number and the degree of your bends, and go with a slightly larger diameter tubing whenever possible. This way you'll minimize any possible restrictions, and get the most performance for you dollars spent.
It ought to flow pretty good when you get that crossover moved. It looks like the passenger side has to make a turn to go toward the rear of the car, where the crossover is providing a straighter route. I bet it's actually trying to flow down the crossover, which looks like it would be colliding head on with the drivers side. I don't believe gas is ever supposed to flow thru an h pipe... X pipe yes, but an h pipe should just be there to equalize the pressure. When you get that thing fixed you're going to feel a nice difference... and hear a big difference too.
The sad thing is that, in my experience, exhaust shop people are so opinionated and preachers of back pressure that if you took it back to them to fix it they would be rolling their eyes the whole time. I hate talking to exhaust people...unless they're the type of shop that understand mandrel bends. Those shops understand.
Keep us posted!
The sad thing is that, in my experience, exhaust shop people are so opinionated and preachers of back pressure that if you took it back to them to fix it they would be rolling their eyes the whole time. I hate talking to exhaust people...unless they're the type of shop that understand mandrel bends. Those shops understand.
Keep us posted!
Last edited by KurtRardin; Aug 2, 2012 at 08:36 AM.
Yea, I knew I would have to fix up the H-pipe but overall I am really happy with its construction and more importantly how he meticulously tucked it.
So if I cut out the H-pipe portion and have them weld in my universal JEG's H-pipe, how do you think this non-mandrel bent 2.5" looks in terms of flow? I'm thinking of selling this True Dual and purchasing the Kooks TD system.
So if I cut out the H-pipe portion and have them weld in my universal JEG's H-pipe, how do you think this non-mandrel bent 2.5" looks in terms of flow? I'm thinking of selling this True Dual and purchasing the Kooks TD system.
Like mentioned previously, remove that awkward H-pipe and either place a H-pipe where the pipes are already running parallel or even better a X-pipe.
Fix it and run with it ! Yea, I knew I would have to fix up the H-pipe but overall I am really happy with its construction and more importantly how he meticulously tucked it.
So if I cut out the H-pipe portion and have them weld in my universal JEG's H-pipe, how do you think this non-mandrel bent 2.5" looks in terms of flow? I'm thinking of selling this True Dual and purchasing the Kooks TD system.
So if I cut out the H-pipe portion and have them weld in my universal JEG's H-pipe, how do you think this non-mandrel bent 2.5" looks in terms of flow? I'm thinking of selling this True Dual and purchasing the Kooks TD system.
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Brett Foote
Joined: Nov 2003
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From: Wichita KS / Rancho San Diego
Your exhaust shop can get the elbows and bends needed to clean up that area around and after the H where the pipe is extremely pinched. It requires more welding than just bending the hell out of the pipe, but your shop is clearly capable of doing it. The rest of the job looks pretty good!
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
Last edited by 01ssreda4; Aug 3, 2012 at 12:38 AM.
Thread Starter
TECH Junkie
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From: Southside Chicago
I'm going to see if I can swing by the shop on Saturday. It's kind of far, maybe 45 minutes away but I was happy with their service; they took their time and did not rush it all.
Since it's so far, I got a quote from a shop closer to me. Wanted 200 bucks - yea right.
Since it's so far, I got a quote from a shop closer to me. Wanted 200 bucks - yea right.
Last edited by 02TransAm/Batmobile; Aug 3, 2012 at 02:32 AM.
I'm going to see if I can swing by the shop on Saturday. It's kind of far, maybe 45 minutes away but I was happy with their service; they took their time and did not rush it all.
Since it's so far, I got a quote from a shop closer to me. Wanted 200 bucks - yea right.
Since it's so far, I got a quote from a shop closer to me. Wanted 200 bucks - yea right.
Oh please...have you seen a diagram of this muffler? A straight through muffler like a magnaflow, Hooker Maxflow or Dynomax bullet craps on those flowmasters. Please show me a diagram of that muffler and why it flows so well...
Last edited by ss454327; Aug 9, 2012 at 02:19 PM.
Staging Lane
Joined: Feb 2011
Posts: 75
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Not to jump on ya ,but most apps will actually make more power with these.due to the scavenging effect they have.a straight through muffler gives up torque .i have personally been 9.80 on a 275 shot. Through 3.5 inch duals and single chamber flow masters.he is nowhere near that so this exhaust will more than be sufficient for him.how much experience do you have trying out exhaust? The chambers merely deflect sound.do some research on how exhaust systems work .youll probably make your car faster.the loudest is not always the fastest.
Not to jump on ya ,but most apps will actually make more power with these.due to the scavenging effect they have.a straight through muffler gives up torque .i have personally been 9.80 on a 275 shot. Through 3.5 inch duals and single chamber flow masters.he is nowhere near that so this exhaust will more than be sufficient for him.how much experience do you have trying out exhaust? The chambers merely deflect sound.do some research on how exhaust systems work .youll probably make your car faster.the loudest is not always the fastest.
Also are you saying those flowmasters were better than some strait through mufflers on your setup? I'm sure losing tq down low would have really killed your setup. I mean you went 9.80 after all so you tried more than one muffler right? Not to jump on ya or anything but surely your setup was faster than open headers?
The best exhaust systems have the most velocity WITHOUT giving up any flow. Back pressure is BS and the best setup system has 0 back pressure. Also if you are making several 90 degree bends to get the pipes side my side for a merge simply to get the scavaging effect you are probably giving up more HP than you are gaining if you have just ran strait out and never merged.
yeah, i do ALOT of exhaust work, and that system is actually really nice for what it is, BUT thet H-pipe or double vee pipe lol is the killing factor. delete that and do a nice x over and youll be game! looks like the exhaust flows very well....from the vee on..
