True Dual on a NA Practically Stock - Hindering Performance?
i wanted hks but i really want low end torque so does anyone know a single exhaust thats acctually single canister. ive seen them on the g35 alot acctually. I figure if i get single exhaust i dont want it to look dual like the stock.
i found this pic but not on a purchase sight
i found this pic but not on a purchase sight
Last edited by quietkilla6; Jun 5, 2008 at 09:58 PM.
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From: FLA
Originally Posted by 411Z
you have to kind of break it down, and look at it.
if your running a single 3" system, your getting 3" of flow. its that simple. this is good for up to around 450hp.
when you run TD, if you have 2.5" on both sides (why wouldnt it be the same
), thats 5" of exhaust flow. and a lot less back pressure.
this is what i used to tell my customers. if you want torque, stay single, but big. if your looking to go 200mph over a long distance, go dual. when you go dual, unless your pushin over 500 at the crank, your losing backpressure with duals, thus losing the torque. but you will gain horsepower.
if you want the power from true duals on a stock Z, you might try a gear change as well. that could counteract the loss of tq. hope it helps.
if your running a single 3" system, your getting 3" of flow. its that simple. this is good for up to around 450hp.
when you run TD, if you have 2.5" on both sides (why wouldnt it be the same
), thats 5" of exhaust flow. and a lot less back pressure.this is what i used to tell my customers. if you want torque, stay single, but big. if your looking to go 200mph over a long distance, go dual. when you go dual, unless your pushin over 500 at the crank, your losing backpressure with duals, thus losing the torque. but you will gain horsepower.
if you want the power from true duals on a stock Z, you might try a gear change as well. that could counteract the loss of tq. hope it helps.
Originally Posted by blazefast
backpressure never helped anyone, period.
Originally Posted by 411Z
you have to kind of break it down, and look at it.
if your running a single 3" system, your getting 3" of flow. its that simple. this is good for up to around 450hp.
when you run TD, if you have 2.5" on both sides (why wouldnt it be the same ), thats 5" of exhaust flow. and a lot less back pressure.
this is what i used to tell my customers. if you want torque, stay single, but big. if your looking to go 200mph over a long distance, go dual. when you go dual, unless your pushin over 500 at the crank, your losing backpressure with duals, thus losing the torque. but you will gain horsepower.
if you want the power from true duals on a stock Z, you might try a gear change as well. that could counteract the loss of tq. hope it helps.
if your running a single 3" system, your getting 3" of flow. its that simple. this is good for up to around 450hp.
when you run TD, if you have 2.5" on both sides (why wouldnt it be the same
), thats 5" of exhaust flow. and a lot less back pressure.this is what i used to tell my customers. if you want torque, stay single, but big. if your looking to go 200mph over a long distance, go dual. when you go dual, unless your pushin over 500 at the crank, your losing backpressure with duals, thus losing the torque. but you will gain horsepower.
if you want the power from true duals on a stock Z, you might try a gear change as well. that could counteract the loss of tq. hope it helps.
and where do you get these numbers? you don't need 500hp to use a dual. Of course i'm not saying dual is better than single.. it just isn't so rulebook like you say it is..
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From: kuwait
Originally Posted by itsjiggajames
what is this blasphemy you speak of? Sorry to burst your bubble but here in the real life physics world not everything is 2+2=4... LOL.. A single 3inch will flow better than a true dual 1.5inch..
i installed APS 2.5 TD exhaust ,accelaration much better , dayno gain 17 WHP and a quick revup so better Response .
Originally Posted by itsjiggajames
what is this blasphemy you speak of? Sorry to burst your bubble but here in the real life physics world not everything is 2+2=4... LOL.. A single 3inch will flow better than a true dual 1.5inch..
and where do you get these numbers? you don't need 500hp to use a dual. Of course i'm not saying dual is better than single.. it just isn't so rulebook like you say it is..
and where do you get these numbers? you don't need 500hp to use a dual. Of course i'm not saying dual is better than single.. it just isn't so rulebook like you say it is..
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-----UPDATE-----
Took off true dual and put stock back on. All my problems are fixed. Car has all the low end torque back. Lesson learned, true dual on NA kills low end torque and I can't enjoy my car without low end torque.
Took off true dual and put stock back on. All my problems are fixed. Car has all the low end torque back. Lesson learned, true dual on NA kills low end torque and I can't enjoy my car without low end torque.
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From: kuwait
Originally Posted by Darkness75
+1
i installed APS 2.5 TD exhaust ,accelaration much better , dayno gain 17 WHP and a quick revup so better Response .
i installed APS 2.5 TD exhaust ,accelaration much better , dayno gain 17 WHP and a quick revup so better Response .
the gain was on WOT the gain was notesable .
SO ,dose that meen the the only way to get back my TQ is to go back to single exhaust
p.s : what about these comb : 1) nismo + HFC
2) Turbo XS + HFC
any lossing of TQ ? or less RASP ??
I would imagine an "Exhaust Depot" exhaust not yielding any gains whatsoever. Next time, go with a proven brand name. You're generalizing and making blanket statements now.
Last edited by SniperHunter; Jun 21, 2008 at 06:18 AM.
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From: kuwait
Originally Posted by Arnold K.
I would imagine an "Exhaust Depot" exhaust not yielding any gains whatsoever. Next time, go with a proven brand name. You're generalizing and making blanket statements now.
.second : i`m talking about a comb of 2.5" true dual +HFC ,,losing TQ in low-end (normal daily use not WOT) ,,also proven
there'd : 2.5"+ TD + HFC = RASP ,,,,,PROVEN
share with us your magical comb that we don`t know about ,,with clip that would be nice ???????
thank you
Originally Posted by 411Z
you have to kind of break it down, and look at it.
if your running a single 3" system, your getting 3" of flow. its that simple. this is good for up to around 450hp.
when you run TD, if you have 2.5" on both sides (why wouldnt it be the same ), thats 5" of exhaust flow. and a lot less back pressure.
this is what i used to tell my customers. if you want torque, stay single, but big. if your looking to go 200mph over a long distance, go dual. when you go dual, unless your pushin over 500 at the crank, your losing backpressure with duals, thus losing the torque. but you will gain horsepower.
if you want the power from true duals on a stock Z, you might try a gear change as well. that could counteract the loss of tq. hope it helps.
if your running a single 3" system, your getting 3" of flow. its that simple. this is good for up to around 450hp.
when you run TD, if you have 2.5" on both sides (why wouldnt it be the same
), thats 5" of exhaust flow. and a lot less back pressure.this is what i used to tell my customers. if you want torque, stay single, but big. if your looking to go 200mph over a long distance, go dual. when you go dual, unless your pushin over 500 at the crank, your losing backpressure with duals, thus losing the torque. but you will gain horsepower.
if you want the power from true duals on a stock Z, you might try a gear change as well. that could counteract the loss of tq. hope it helps.
A 3" diameter tube has a crossectional area of 7.07" sq. (Pi*R squared)
Two 2.5" pieces of pipe have a combined crossectional area of 9.8" sq.
That dual 2.5" will flow 28% more air than the 3"
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From: FLA
Originally Posted by Darkness75
huh 
where is the fun then ,the takeoff is the most exciting thing about speed
where is the fun then ,the takeoff is the most exciting thing about speed
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From: kuwait
Originally Posted by KA24DE
The S2000 I drove was plenty exciting. The drop off in power at redline in a Z is not what I call a very entertaining drive. Want low end torque, drive a truck.
mm you know what ,i don`t know where we are going with this (lets not f*** the guy thread , i love to do that
on the take off and its not the same with 2.5" TD exhaust + HFC not to mention RASP 