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07-23-2009, 11:41 AM | #496 (permalink) |
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07-23-2009, 11:50 AM | #497 (permalink) | |
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Plain and simple: the shortest distance between two points is a straight line. I understand that N/A vehicles need a certain amount of back pressure keep up low end torque. But, if you look at everyone Else's design, aside of the fact that they all look the same, the bends are atrocious. Some bends are as high as 120 degrees. Right now, we are only separated by at most 8-10 HP, but if you were to turbocharge or supercharge the car, we would decimate the competition in terms of torque and power across the board. If you are going to go through the trouble to scavenge the exhaust by using a good cross over ( X Pipe) then your exhaust system is contradicting itself by backing back up where it goes in to the mufflers. Yes, we sacrificed some ground clearance, but if you are conscious of your driving habits and your cars well being you will not bottom out. If you take a dip at 50 MPH well then that is your own fault. As far as aesthetics, IMHO it fits the car like a glove. This is by far the best looking Z to date and it needs to be complimented with an exhaust that fits the bill!
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07-23-2009, 12:02 PM | #499 (permalink) |
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Just to let you all in on what we are about...
Bottom line, "We manufacture horsepower" We built this car and many like it from the ground up. In this video it made 1000 HP at the tires. Currently it makes about 1300! [YOUTUBEHQ]<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/qJplTDvOYwU&hl=en&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/qJplTDvOYwU&hl=en&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>[/YOUTUBEHQ]
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07-23-2009, 12:12 PM | #500 (permalink) | |
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you aren't separated by 8-10 HP once you factor in the high flow cat with the cat-back combo (which most people doing an exhaust will do both)...in fact Berk Dyno'd a gain of 32hp (19 from HFC's first, then another 13 adding exhaust) with their combo...
Like I said though, add a turbo and you may feel a difference from the straight shot compared to a couple extra bends. with both having Mandrel bent piping the gains aren't going to be significant even with a turbo. Maybe an extra 3-4 hp overall running 7 - 10 psi. Forced induction will go well with any of the exhaust combo's out there, but if you are serious about boost you are going to want to increase the piping diameter, and you will likely follow the FI routing for a straighter shot. but that is going custom anyway. Quote:
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07-23-2009, 12:28 PM | #502 (permalink) | |
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I understand why you might think they picked up 32 HP but that is not the correct way to look at it. Mods do not compound like that. You cannot dyno a car with one mod 8 months ago and say oh we picked up 19 hp and then dyno it now and say well, we picked up another 13 hp from the cat back so that must mean added together we make 32 hp. Just about every 370Z out there makes right around 280 at the wheels on a dynojet in correct 1:1 gear stock! Now, if they indeed picked up 32 hp at the wheels show me the dyno where they made roughly 312! From what I have seen they have yet to break even 300 with the cats and the cat back combined. Look, we dynoed ours in almost 100 degree heat as well and we dynoed it stock and we dynoed it with just the cat back and so on and so forth in the same day in the same environment! From doing extensive dyno testing with this car I highly doubt any set of high flow cats out there (including mine) will pick up anywhere near 19 hp with the stock cat back on the car. The stock cat back is so restrictive it will not allow it. If there was a BS flag I would raise it, but I cannot find one. For the turbos, with the 7-10 PSI, my friend if I know anything it is turbos for a long time now and I strongly disagree with the statement that we may make 3-4 more horsepower with the less bends. You have to be kidding, right? Yes, the more boost you make the greater the gap will be but even at 7-10 PSI it will be significant! Come on, we make more than 3-4 more HP N/A!!!
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07-23-2009, 12:28 PM | #503 (permalink) | |
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07-23-2009, 12:34 PM | #504 (permalink) | |
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3-4 hp was the difference between the 2 cat-backs, not the overall gain. DDM did a baseline, then another pull with the HFC's and did 19 hp...later on down the road he did a NEW baseline, then added the exhaust and got 13 hp. Yes, the temperature was low for the HFC's compared to 110 degrees he ran in with the exhaust, so adjusted for temp and take away 10% of the original 19hp gain and you are still looking at 30hp to the wheels, or over 10% gain.
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07-23-2009, 12:36 PM | #505 (permalink) | |
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Prototype 2 was with the H-pipe, prototype 3 was with the X-pipe if I recall.
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07-23-2009, 12:53 PM | #506 (permalink) | |
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3-4 over the competition with turbos, again you have to be joking. Well when we get our turbo kit done for the 370Z (opps I let the cat out of the bag, me and my big mouth) I will show you a comparison and you will shake your head in dis belief. I have yet to see a dyno with the stock cats and and just their cat back. Of course the cats are going to free up more power. Explain to me why you would do a baseline dyno with aftermarket cats and a stock cat back. They made with their cats and stock cat back with what we made completely stock. If you really want to break it down, the day before, a dyno was attempted with aftermarket air intakes. I wonder if the dyno had gone smooth if that wouldn't of been disclosed!
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07-23-2009, 12:54 PM | #507 (permalink) | |
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07-23-2009, 12:55 PM | #508 (permalink) |
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Whats up brotha, how have you been?
Yeah, we averaged about 24 with that setup. Hell, we averaged about 28 with resonated test pipes and the cat back.
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07-23-2009, 01:05 PM | #509 (permalink) |
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You are both using highly efficient mandrel bent piping, with straight through mufflers. A couple extra bends is not going to make a huge difference on 7psi of boost. I do agree that the straighter design will likely be a little higher, I just don't see it being more than a few horsepower. If you can prove me wrong then by all means show me the numbers comparison when you have your boosted Z and I'll be more than happy to tell you I was wrong
DDM said his intentions were to dyno his car in its current form and use that as a baseline, then add the exhaust and dyno again for the gains. He was never trying to mis-lead anyone. Why did they not dyno it with the stock cats? Because DDM has had the cats on his car for months now and didn't want to have to pull them off and reinstall everything stock just to get a dyno number. Using a baseline with his current and showing the increase is sufficient to show that the exhaust makes similar power to other competitors. With his only access to a dyno being another shop that is hard to make appointments, I don't see a problem with this. I am pointing out that compared to your high flow cat and cat back combo dyno pull compared to your baseline, you made less overall power than the Berk combo did when looking at their individual gains. Yes, the dyno situations were not the same, which may mean we are retarded for arguing about it over the internet, but it's going to be VERY difficult for either of us to prove anything unless we got the same car, dyno'd it completely stock, then dropped the stock exhaust and dyno'd it with the FI cats and CBE, then dropped that and dynod it with the Berk cats and CBE. I doubt we are going to get the chance to do that, so for now we can continue to try and make our points
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