How restrictive are non-mandrel bends?
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TECH Junkie
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From: Southside Chicago
How restrictive are non-mandrel bends? I had my custom 2.5" true duals fabbed up and it looks great except for the way he fab'd the H-pipe. Having said that, the car feels a tad slower. It seems to rev much slower too. I'm looking to re-fab the H-pipe but wondering if I should step up to a mandrel 3" setup like the Kooks True duals.
Thoughts?
Thoughts?
I had my custom 2.5" true duals fabbed up and it looks great except for the way he fab'd the H-pipe. Having said that, the car feels a tad slower. It seems to rev much slower too. I'm looking to re-fab the H-pipe but wondering if I should step up to a mandrel 3" setup like the Kooks True duals.
Thoughts?
Thoughts?
First of all this is going to upset a lot of you mandrel only fans, by what I going to say. There are a few variables that enter into this that need to be considered when comparing mandrel to typical pipe bender machines. But its not true in most cases that 2.5 mandrel will out flow 3.
Depends on the type of machine they have, I've seen some that use crush benders which look like a bendy straw.
My exhaust guy uses a machine that stretches the pipe. Doesn't create those accordion looking ridges and works just fine.
My exhaust guy uses a machine that stretches the pipe. Doesn't create those accordion looking ridges and works just fine.
How true ,it depends the pipe bender the shop uses, some are good some are bad. One of the better benders is a Ben Pearson . Im tired of guys putting the mouth on crush bends ,when most do not know what they are talking about.
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Thread Starter
TECH Junkie
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From: Southside Chicago
OK, here's the pics:
I don't like the H-pipe. I feel like the gas velocity off the driver's side will flow through the H part, instead of out through the back and slow down the passenger side down.
I've purchased a universal H-pipe from Jegs for 45 bucks and will get in to a shop soon.
I don't like the H-pipe. I feel like the gas velocity off the driver's side will flow through the H part, instead of out through the back and slow down the passenger side down.
I've purchased a universal H-pipe from Jegs for 45 bucks and will get in to a shop soon.
That is some nasty nasty work on the hpipe. Can't really tell the quality of the rest of the exhaust, but based on that part alone I would run far far away from any more "custom" work they do.
As the others have said, aside from that crossover, I wouldn't have an issue running that until you need bigger pipe anyway.
My car keeps picking up every time I upgrade or fix small little things in my 3" system. If you bother getting it redone, get 3" to start and leave yourself room to grow.
My car keeps picking up every time I upgrade or fix small little things in my 3" system. If you bother getting it redone, get 3" to start and leave yourself room to grow.
That system can still be saved . Actually with the exception of H pipe placement, its not a bad design, the driver side is better than most TDs. That is probably the worst placement of the H . Just go with a 2" crossover where the pipes start to run parallel, the traditional placement or better yet go with a X. The most important thing is that shop does have a good bender , try to work with them and get it right.
Thread Starter
TECH Junkie
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From: Southside Chicago
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.
Thread Starter
TECH Junkie
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Joined: Sep 2005
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From: Southside Chicago
damn that doesn't look like it'll flow very well. Post pics when you get it taken care of. Otherwise it looks like a pretty nice set up..post a vid if you can too! So you can do a comparison video and see how big of a difference it is.