Downpipe test = Zero gain
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Downpipe test = Zero gain
Hey, we just did a quick test to confirm my thoughts. We made a nice 3" downpipe and added it to our car. The result? Zero gains, that's right....zero. We did a bunch of pulls, reset the ECU, tried everything and the runs just laid over one another. We'll post some pics of the stock downpipe to show how good it is. We are working on something that will make a difference though.
Hey, we just did a quick test to confirm my thoughts. We made a nice 3" downpipe and added it to our car. The result? Zero gains, that's right....zero. We did a bunch of pulls, reset the ECU, tried everything and the runs just laid over one another. We'll post some pics of the stock downpipe to show how good it is. We are working on something that will make a difference though.
There's not much to the stock downpipe. It's like 2' long with one or two slight bends in it. I think I measured about 2 3/8" I.D. I think once someone comes out with a new exhaust elbow with a bigger outlet (3" vs. 2 1/4"), you'll see some gains from a new DP.
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Why is is that turbo trix got gains from their's then? They went from a catback to turbo back and gained like 15-20 hp. Part of it was that the cat was also removed, but they are at a 106 hp gains with the stock front mount and no tune, you guys are still at 87. 
AMS, maybe you guy need to make a lower ic pipe, because turbo trix made lots of power from theirs apparently. 72 HP just from the upper ic pipe, lower ic pipe, and intake kit with an mbc. STOCK INTERCOOLER, EXHAUST, AND NO TUNE. Do you guys have a lower ic pipe in the works? Headers? O2 housing? Let us know. Thanks.
AMS, maybe you guy need to make a lower ic pipe, because turbo trix made lots of power from theirs apparently. 72 HP just from the upper ic pipe, lower ic pipe, and intake kit with an mbc. STOCK INTERCOOLER, EXHAUST, AND NO TUNE. Do you guys have a lower ic pipe in the works? Headers? O2 housing? Let us know. Thanks.
Why is is that turbo trix got gains from their's then? They went from a catback to turbo back and gained like 15-20 hp. Part of it was that the cat was also removed, but they are at a 106 hp gains with the stock front mount and no tune, you guys are still at 87. AMS, maybe you guy need to make a lower ic pipe, because turbo trix made lots of power from theirs apparently. 72 HP just from the upper ic pipe, lower ic pipe, and intake kit with an mbc. STOCK INTERCOOLER, EXHAUST, AND NO TUNE. Do you guys have a lower ic pipe in the works? Headers? O2 housing? Let us know. Thanks.
AMS, maybe you guy need to make a lower ic pipe, because turbo trix made lots of power from theirs apparently. 72 HP just from the upper ic pipe, lower ic pipe, and intake kit with an mbc. STOCK INTERCOOLER, EXHAUST, AND NO TUNE. Do you guys have a lower ic pipe in the works? Headers? O2 housing? Let us know. Thanks.We took a consistent stock pull using the same correction factor and compared it to a consistent pull after our part installs using the same correction factor. That is how we came to our HP gain. What we wanted to show you was what these parts would give you in an every day scenario.
FYI removing the cat on the X is good for 15 whp by itself..that is where there power increase came from.
I will agree in that we have not put on a lower IC pipe on the car yet. Based on the numbers from the upper I would expect maybe another 5 more peak whp or a hair more.
We are not taking shots at anyone, its just very important you pay close attention to dyno graphs as its very easy to get caught up in numbers.
Eric
Last edited by AutoMotoSports; Feb 16, 2008 at 12:38 PM.
well, the fact that tey are two different x's is not a bit deal. Every car makes a little bit different peak numbers, but it's usually a maximum of like 5 hp. It's not like they were two different makes/models. And yes, different dynos read differently, but it's the gains that I look at, not the base numbers and the upgraded numbers. Gains will be pretty consistent from dyno to dyno, that's why I cited that as an example. And eric, are you saying that turbo trix is deceiving people with false gains? I have a hard time believing that. Maybe the new correction factor was what they found to be a more realistic number. Just a thought. But I don't think that there's any evidence that they just posted the lowest stock pull and then posted the highest pull with the mods. Keith even said that with the cat in, that the pulls were inconsistent once the cat got hot, but that the car makes consistent pulls all day with these new numbers now that the cat is gone. Either way, I am a huge fan of AMS' work, and I'm only trying to stir up that competitive spirit to make sure that everyone is comparing results to achieve the best possible parts.
Again this is not a shot at Turbo Trix or anyone. Dyno's are a very sensitive subject and we just want to be as forthcoming as possible.
Eric
No kidding. I think these guys deserve a lot of credit. They could build a downpipe and call it upgrade but they are being very honest up front and letting us know that they haven't make power with their Downpipe.
Thanks AMS!
Carlos
Thanks AMS!
Carlos