Am i loosing HP
08-23-2006, 08:47 AM
#1
Am i loosing HP ok i know that this should be in the sticky, but i will get better response here.
i hope that Casey and Jordan chime in..
Here i go.. As some of you know i jsut recently got True Duals on my t/a. i got non mandrel bends, and now i jsut got QTP LTs. with the TD being non mandrel bend, am i really loosing that much HP?? the piping is 3" all the way back, and where the bends are i say it goes down to about 2 3/4"
A buddy of mine, his friend had a non mandrel bent TD system and had LTs and said that he dynoed his car it seemed low for his application. lets say he dynoed with the non mandrel bends TD at 330 RWHP. He then got mandrel bend TDs and gained 30RWHP.. Can this be true???
Again am i loosing HP??????
thanks..
i hope that Casey and Jordan chime in..
Here i go.. As some of you know i jsut recently got True Duals on my t/a. i got non mandrel bends, and now i jsut got QTP LTs. with the TD being non mandrel bend, am i really loosing that much HP?? the piping is 3" all the way back, and where the bends are i say it goes down to about 2 3/4"
A buddy of mine, his friend had a non mandrel bent TD system and had LTs and said that he dynoed his car it seemed low for his application. lets say he dynoed with the non mandrel bends TD at 330 RWHP. He then got mandrel bend TDs and gained 30RWHP.. Can this be true???
Again am i loosing HP??????
thanks..
08-23-2006, 08:55 AM
#2
Unless those crush bends were done by a 4 yr old, no way did your buddy gain 30rwhp by changing nothing more than the bends in his exhaust.
Seeing pics of your exhaust, I really don't think you're going to be leaving much if any power on the table, especially since it's 3" and you're running stock internals.
Seeing pics of your exhaust, I really don't think you're going to be leaving much if any power on the table, especially since it's 3" and you're running stock internals.
08-23-2006, 08:57 AM
#3
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i think that you're probably losing some (maybe 5-7 hp), but not very much. two pipes that are 2-3/4 are going to flow better than one 3 inch pipe... it is probably not a good max effort set up, but is still probably very good for a street car.
08-23-2006, 09:45 AM
#5
Originally Posted by jmm98LS1
Unless those crush bends were done by a 4 yr old, no way did your buddy gain 30rwhp by changing nothing more than the bends in his exhaust.
Seeing pics of your exhaust, I really don't think you're going to be leaving much if any power on the table, especially since it's 3" and you're running stock internals.
Seeing pics of your exhaust, I really don't think you're going to be leaving much if any power on the table, especially since it's 3" and you're running stock internals.
LOL, nope done by a very good guy. he has a shop and has aformula so he treated it like his car..
My buddy all he changed was non mandrel bend to mandrel bends. that is it.. i think that is strange???????
Thanks
08-23-2006, 09:45 AM
#6
Originally Posted by 2000TransAmWS6
i think that you're probably losing some (maybe 5-7 hp), but not very much. two pipes that are 2-3/4 are going to flow better than one 3 inch pipe... it is probably not a good max effort set up, but is still probably very good for a street car.
that is what i thought too.. maybe 3-5 i was losing. and now with the LTs i hope to gain some back b/c i am on stock manifolds
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08-25-2006, 09:30 PM
#9
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Originally Posted by jmm98LS1
Unless those crush bends were done by a 4 yr old, no way did your buddy gain 30rwhp by changing nothing more than the bends in his exhaust.
Seeing pics of your exhaust, I really don't think you're going to be leaving much if any power on the table, especially since it's 3" and you're running stock internals.
Seeing pics of your exhaust, I really don't think you're going to be leaving much if any power on the table, especially since it's 3" and you're running stock internals.
I can have him post up the dyno sheets if you'd like?
Mike
08-26-2006, 09:59 AM
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even with the crush bends they still should outflow a mandrel 2 1/2 system.alot of people only pick up 30 hp or so going from a single 3" flowmaster
to a true dual setup.
to a true dual setup.
08-26-2006, 10:04 AM
#13
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Originally Posted by jmm98LS1
Those crush bends must have had some ridiculous kinks in them if he picked up that much power by switching to mandrel bends.
09-04-2006, 08:09 AM
#20
I have mandrel bends on my system up to the muffler and then "good" crush bends behind the muffler. I may be leaving some power on the table, but my trap speed says I'm running just fine. And 2.5" exhaust will support well over 500 horsepower. '03-04 Cobras run 2.25" or 2.5" inch and they get over 600 out of it. I believe the new GT 500 is also running 2.25", but don't quote me on that.