I had DC header for a while and decided to put back the stock header. I took the car for a drive and noticed the exhaust note is much quieter. There seems to be more torque everywhere. For some reason it feels like I gained power...hit vtec and it was pulling very hard. With my DC header there was a much noticable difference going from 5k rpm into VTEC. With a stock header the more I dip the throttle the better it seems to pull. Did anyone have a similar experience?
I have never seen a dyno of a 4th gen VTEC with a DC header.
Last edited by vtecprelude; 11-15-2002 at 09:18 PM.
Just to help you out bro, not to try to act smart or anything, You don't say headers when you are talking about a single head engine, headers with an "s" is refering to a v8 or v6 which have two heads, just drop the "s".
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04 Ford Powestroke Diesel Crew Cab, Shortbed,4x4, SCT Tuner,with Tunes from innovative Diesel,4 inch Donahoe lift,ARP headstuds,AFE Stage 2 intake,MBRP 4 inch Exhaust,4:30 gears from unitrax,18 inch KMC wheels(black) with 35 inch Toyo M/T's.
440 whp 800 torque.
Originally posted by slp mode Just to help you out bro, not to try to act smart or anything, You don't say headers when you are talking about a single head engine, headers with an "s" is refering to a v8 or v6 which have two heads, just drop the "s".
For some odd reason I didin't realize I did this, obviously you are correct.
Originally posted by mario24601 Sometimes stock is the best, I mean come on, Honda engineers know what they are doing, this is not always the case but stock is better in some cases
It wasn't a drastic feel but it just felt different. Sometimes torque can trick you into thinking you are making more power.
The stock header has less flow, thus you feel more torque...don't mistake that for speed/power, it's this the feel of the stock header. The point of the DC is better flow for high end performance
Hey Satansrv can you explain a little more on this subject, I never quite understood how you get more of a torque feel with a stock exhaust manifold.
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04 Ford Powestroke Diesel Crew Cab, Shortbed,4x4, SCT Tuner,with Tunes from innovative Diesel,4 inch Donahoe lift,ARP headstuds,AFE Stage 2 intake,MBRP 4 inch Exhaust,4:30 gears from unitrax,18 inch KMC wheels(black) with 35 inch Toyo M/T's.
440 whp 800 torque.
DC header wasn't cloged, but it deffinetly flows more than stock.
I have some racing exhaust system with no pre-muffler, its pretty much straight through, very loud.
With a DC header the sound was very deep and loud, now that it's cold outside I have the windows closed the sound just bacomes unbearable after driving for 30 min. This is the reason I switched the stock header, the exhaust note isn't as deep and also quieter.
With stock header it kind of feels like something is tugging on the back of my car and I'm pulling away from it. With DC header the car felt more pliable. Maybe the fact that I already have such a free flowing exhaust along with DC headers made the engine loose some torque.
There is a performance shop about 45 min away that has a dyno, I would like to take my car and see how it turns out, sometime in the spring.
Last edited by vtecprelude; 11-16-2002 at 09:36 AM.
Originally posted by slp mode Hey Satansrv can you explain a little more on this subject, I never quite understood how you get more of a torque feel with a stock exhaust manifold.
Stock exhaust manifold doesn't flow as good as DC therefore creating more back pressure. This back pressure is good if you are just partially on the throttle, but when you give it full throttle at higher rpm the stock exhaust manifold becomes a bottleneck. So it's basically a trade off, more low end power with stock manifold and better high end with DC. Plus the engineers designed the engine to take advantage of the back pressure. It be nice to have I-VTEC.
Originally posted by vtecprelude After driving with stock header for a while I noticed that full throttle accelration is not as good, but regular driving is better.
Yup that makes sense at higher throttle you don't have the flow and it begins to back up, contaminating the intake charge....
Originally posted by vtecprelude After driving with stock header for a while I noticed that full throttle accelration is not as good, but regular driving is better.
i notice the same thing w/ the silencer in.. under 5k it runs better.
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