2.75" crush bent vs. 3" mandrel
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 327
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2.75" crush bent vs. 3" mandrel Is the 1/4", smoother bends worth the huge price difference? How much difference is it going to make anyway on a n/a 5.7?
Don't mean to sound like an a** but please only answer if you actually know the answer...like you have experienced the difference first hand or
know someone that has and not just answer based on what you heard. Don't want to make a decision based on myths.
Thanks!
Don't mean to sound like an a** but please only answer if you actually know the answer...like you have experienced the difference first hand or
know someone that has and not just answer based on what you heard. Don't want to make a decision based on myths.
Thanks!
I would say it really just depends on your HP goals. If your just looking to slap on an exhaust and not looking for big numbers or crisp clean sound then go with whatever fits your budget.
I'd personally make the decision on something like that based on price. For instance, a friend of mine made under the axle duals for his LT1 car with standard pipe and bender, but only because it was essentially free as his brother owned the repair shop.
Considering stainless 3" true duals can be had for $300-$400, it'd need to be virtually free for me to run 2.75" crushed pipe.
Considering stainless 3" true duals can be had for $300-$400, it'd need to be virtually free for me to run 2.75" crushed pipe.
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Fact, crush bends restrict flow. The tighter the bend the more flow restriction you have. So to minimize any loss in flow you need to go with as little bend angle as possible, and with as few as many bends as possible. Furthermore you'll want to also go with a larger diameter pipe than you would IF you were using mandrel bends to offset the reduced pipe size in the bends.
You really can't compare pipe size when using crush bends, since a 2.75" diameter pipe won't flow any better than its tightest/largest crush bend angle. So a 2.75" pipe might not flow any better than a 2" or 2-1/2" pipe depending on the bends put in it.
You really can't compare pipe size when using crush bends, since a 2.75" diameter pipe won't flow any better than its tightest/largest crush bend angle. So a 2.75" pipe might not flow any better than a 2" or 2-1/2" pipe depending on the bends put in it.
Last edited by 99Bluz28; Sep 27, 2014 at 12:42 AM.
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Verdad Gallardo Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 327
Likes: 1
Fact, crush bends restrict flow. The tighter the bend the more flow restriction you have. So to minimize any loss in flow you need to go with as little bend angle as possible, and with as few as many bends as possible. Furthermore you'll want to also go with a larger diameter pipe than you would IF you were using mandrel bends to offset the reduced pipe size in the bends.
You really can't compare pipe size when using crush bends, since a 2.75" diameter pipe won't flow any better than its tightest/largest crush bend angle. So a 2.75" pipe might not flow any better than a 2" or 2-1/2" pipe depending on the bends put in it.
You really can't compare pipe size when using crush bends, since a 2.75" diameter pipe won't flow any better than its tightest/largest crush bend angle. So a 2.75" pipe might not flow any better than a 2" or 2-1/2" pipe depending on the bends put in it.
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 327
Likes: 1