2.5 inch exhaust vs. Open header **DYNO**

[2fastGSR]

Originally Posted by BIGTUNA Hahahaha solid ET's with 2.3 60' hahahahahahahahahaha Big Tuna - 1 , Teamdiesel - 0

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[Teamdiesel]

Originally Posted by BIGTUNA

Hahahaha solid ET's with 2.3 60'

That time was achieved with street tires on an unpreped track, spining the whole of 1st, 2nd, and part of third! Here is the vid to prove it.

Teamdiesel = 1, Bigtune = -1

[IntegraType-R]

Hrm.. Alot of "proven" this and that in this thread, for one.. if someone like vteckidd told me, and providie addition information on the situation of why something works, and then even Donf chimmed in, i'd tried to see they're point of view..

I understand where diesel is coming from though, and although his information isn't 100% accurate i know where he's going.. Face it.. 30+whp from dropping an exhaust wont happen.. The reason you gainned it is probably th climate, maybe a more aggressive tuning you did that day.. and overall the car just reacting better.. Thats fine for you.. I personally have never seen a 30+whp gain from just dropping the exhaust..
I can tell you this tho, and this is a personal experince.. before my car went down for the 3rd time 8 months ago, i had some sparks racing knock off header from ebay, i ran to a custom real 2.5'' exhaust.. this was before the itbs, or even before the pX manifold. I had a OG skunk2 manifold with the s2s2's, When i dropped the header w/o tuning..i gainned almost 11 More whp w/o touching a thing.. Personally i believe another 8 more whp if not a few more could have been unlocked by tuning it..
Maybe your alittle "exaggrant" or however you spell it but i understand where your coming from.. but its not 100% accurate.

[VtecKiDD]

Originally Posted by IntegraType-R

Hrm.. Alot of "proven" this and that in this thread, for one.. if someone like vteckidd told me, and providie addition information on the situation of why something works, and then even Donf chimmed in, i'd tried to see they're point of view..

I understand where diesel is coming from though, and although his information isn't 100% accurate i know where he's going.. Face it.. 30+whp from dropping an exhaust wont happen.. The reason you gainned it is probably th climate, maybe a more aggressive tuning you did that day.. and overall the car just reacting better.. Thats fine for you.. I personally have never seen a 30+whp gain from just dropping the exhaust..
I can tell you this tho, and this is a personal experince.. before my car went down for the 3rd time 8 months ago, i had some sparks racing knock off header from ebay, i ran to a custom real 2.5'' exhaust.. this was before the itbs, or even before the pX manifold. I had a OG skunk2 manifold with the s2s2's, When i dropped the header w/o tuning..i gainned almost 11 More whp w/o touching a thing.. Personally i believe another 8 more whp if not a few more could have been unlocked by tuning it..
Maybe your alittle "exaggrant" or however you spell it but i understand where your coming from.. but its not 100% accurate.

and im here to tell you that either your exhaust was wrong, or the exhaust version of the setup wasnt tuned correctly.

If you drop your exhaust an pick up more than 5whp, then your exhaust is not designed or routed properly.

Shop i used to work for made custom exhausts and our mandrel bent exhausts were always almost dead on with open header dyno pulls on the same car. We tested it a few times on a few different cars including mine.

[b20beast978]

great thead!

[mar778c]

Originally Posted by VtecKiDD

If you drop your exhaust an pick up more than 5whp, then your exhaust is not designed or routed properly.

I agree with this statement 100%.

I still rock the 3" on my 1.8L.

[2fastGSR]

Originally Posted by Teamdiesel

That time was achieved with street tires on an unpreped track, spining the whole of 1st, 2nd, and part of third! Here is the vid to prove it.

Teamdiesel = 1, Bigtune = -1

That just shows me how little you know how to drive buddy. I cut 2.0s on street tires, going 12.9s. IF your spinning into 3rd, your launching way to high regardless of track prep.

One of my favorite billy madison quotes fits in good here:

Teamdiesel what you just said was one of the most insanely, idiotic things i have ever heard. At no point in your rambling , incoherent response, were you even close to anything that could be considered a rational thought. Everyone is now dumber for listening to it. I award you NO POINTS, and may god have mercy on your soul. .

[mar778c]

Guys, just let go. Personal attacks won't persuade anyone. Most here recognize what right from wrong. He'll figure it out eventually.

[IntegraType-R]

Originally Posted by VtecKiDD

and im here to tell you that either your exhaust was wrong, or the exhaust version of the setup wasnt tuned correctly.

If you drop your exhaust an pick up more than 5whp, then your exhaust is not designed or routed properly.

Shop i used to work for made custom exhausts and our mandrel bent exhausts were always almost dead on with open header dyno pulls on the same car. We tested it a few times on a few different cars including mine.

The exhaust was a fly by night shop i needed something to hold me over..
I run a true 60mm(2.5'') exhaust system from Tsudo, the N1 version, its a Cat back version but with the hytech i have no, i have to mod my b pipe.. So from teh hytech i have a modded flex pipe thats 2.5 to my exhaust which is 2.5 all the way back i might even go bigger if i can get away with it..
Your suggestion? Because the route i was going to go was to get this to hold me over and once i saved up some money, go ahead, cut the exhaust pipe off the piping and run a 3'' inch all the way back from the header and weld my exhaust n1 back on..?

[IntegraType-R]

Originally Posted by mar778c

Guys, just let go. Personal attacks won't persuade anyone. Most here recognize what right from wrong. He'll figure it out eventually.

I completey agree with what you and VtecKidd are saying.. and i understand too i'm just pointing out that i picked up that whp because the exhaust shop that did my exhaust was infact shitty..

[Teamdiesel]

Originally Posted by 2fastGSR

That just shows me how little you know how to drive buddy. I cut 2.0s on street tires, going 12.9s. IF your spinning into 3rd, your launching way to high regardless of track prep.

One of my favorite billy madison quotes fits in good here:

Teamdiesel what you just said was one of the most insanely, idiotic things i have ever heard. At no point in your rambling , incoherent response, were you even close to anything that could be considered a rational thought. Everyone is now dumber for listening to it. I award you NO POINTS, and may god have mercy on your soul. .

I spin into third because of the insane low end torque open header provides . But serious though, I launched at 2000 rpms in that vid and had to feather it or I would have spun them on the spot . What mph did you get with that 12.9 on street tires?

[JDogg]

we picked up 85hp on a turbo b16, stock exhaust w/stock cat switched to a full 3inch..

[Sinitron]

Jdogg can still tune cars, regardless of 2.25 or 3".

[rochesterricer]

I think some people are missing the point of this post. There are lots of people out there that try to argue that you might lose power by going to something like 3" exhaust. They try to argue that you need a certain amount of backpressure in an exhaust. This shows that such a view is incorrect.

[SMSP]

Just FYI,

About 5 years ago< ibuilt a B20VTEC header for SGT's B20. Ran it through a full 2-1/2" exhaust, no cat, 22" resonator and a 4x9 muffler. Car made 231whp. We dropped the exhaust and it made 232 whp.

[JDogg]

Originally Posted by SMSP

Just FYI,

About 5 years ago< ibuilt a B20VTEC header for SGT's B20. Ran it through a full 2-1/2" exhaust, no cat, 22" resonator and a 4x9 muffler. Car made 231whp. We dropped the exhaust and it made 232 whp.

what did the rest of hte curve look like? as you can see in this car there wasnt much gained as far as peak power goes. it was all in the midrange or after peak..

[SMSP]

Originally Posted by JDogg

what did the rest of hte curve look like? as you can see in this car there wasnt much gained as far as peak power goes. it was all in the midrange or after peak..

Just about the same as my old mind recalls.