Joined: 12 Feb 2006 Posts: 755 Location: Hilton Head Island/ Clemson, SC
Posted: Fri Oct 23, 2009 12:00 am Post subject:
kbrew8991 wrote:
do hang on to the red paint - you will likely need to touch it up everytime you have tires remounted on those wheels
The cool part is it is actually not paint. Its red pin striping, so its more like a tape (in the sense that it has an adhesive backing) if that makes any sense. I have plenty left over if I need to redo a couple of the wheels, but it seems to be holding up decently well. Its survived roughly a week of driving and one car was so far and its still holding strong, so hopefully I don't have to tend to it that often. _________________ "Here we are. We're back and we never give up." -Michael Schumacher, 7 time Formula 1 World Champion
Less restrictive exhaust (for whatever reason) usually means less low-end power and more high-end power. Something to do with backpressure and what not
CEL only shows up if you remove the O2 sensors. Past that, the computer has no idea what's going on and doesn't care.
No cars need backpressure, it's a myth, more backpressure is always a bad thing, turbo or NA.
Velocity is what is needed on NA cars. The reason cars will lose power when going to larger than necessary exhaust (NA) is because the engine literally cannot push the exhaust out of the piping because there is too much of a drop in velocity(= too much volume) to keep it moving out.
Scorke _________________ '03 Lancer Evolution- Darwin on a dry shot
'08 Fit- So much go it's slow
Joined: 12 Feb 2006 Posts: 755 Location: Hilton Head Island/ Clemson, SC
Posted: Fri Oct 23, 2009 1:43 am Post subject:
evilevo11 wrote:
humjaba wrote:
Less restrictive exhaust (for whatever reason) usually means less low-end power and more high-end power. Something to do with backpressure and what not
CEL only shows up if you remove the O2 sensors. Past that, the computer has no idea what's going on and doesn't care.
No cars need backpressure, it's a myth, more backpressure is always a bad thing, turbo or NA.
Velocity is what is needed on NA cars. The reason cars will lose power when going to larger than necessary exhaust (NA) is because the engine literally cannot push the exhaust out of the piping because there is too much of a drop in velocity(= too much volume) to keep it moving out.
Scorke
I've actually heard this before. I'm still a little fuzzy on the details, so can you or someone else extrapolate on this for the non-engineering types among us? _________________ "Here we are. We're back and we never give up." -Michael Schumacher, 7 time Formula 1 World Champion
Less restrictive exhaust (for whatever reason) usually means less low-end power and more high-end power. Something to do with backpressure and what not
CEL only shows up if you remove the O2 sensors. Past that, the computer has no idea what's going on and doesn't care.
No cars need backpressure, it's a myth, more backpressure is always a bad thing, turbo or NA.
Velocity is what is needed on NA cars. The reason cars will lose power when going to larger than necessary exhaust (NA) is because the engine literally cannot push the exhaust out of the piping because there is too much of a drop in velocity(= too much volume) to keep it moving out.
Scorke
I've actually heard this before. I'm still a little fuzzy on the details, so can you or someone else extrapolate on this for the non-engineering types among us?
Ok. Basically the reason why you can go too big on exhaust piping is because as you increase the size, you decrease the velocity of the air coming out the exhaust ports. Once you go big enough the air coming out of the exhaust ports loses so much velocity that you basically have stagnant exhaust gasses sitting in the piping, that wants to get out, but because of the larger volume of the piping it has to expand to fill the space instead of moving out of the smaller volume piping to cross the pressure differential.
The air in the cylinder leaves the exhaust valves because the pressure in the exhaust is less than in the cylinder (duh). The pressure in the exhaust wants to leave the exhaust because the pressure outside the car (atmospheric) is lesser than the pressure of the exhaust in the piping. Gasses always want to move to a location of lesser pressure, if you blow up a balloon and don't tie the end it wants to deflate because of this. If you take away the difference between the exhaust ports and the atmosphere you need something else to force the exhaust gasses out of the piping. In the case of using too large a volume of piping the exhaust gasses need to rely on the constant pressure of the gasses coming out of the exhaust port, and not the pressure differential between the exhaust pipe and atmosphere.
The only reason I posted my initial response is because I am out in California right now at EFI university and this is one of those things that we happened to talk about after class tuesday, common "tuner" false-doms.
Sorry for the thread jack.... hope somebody on here learned something new tonight/this morning depending on where you are.
Scorke _________________ '03 Lancer Evolution- Darwin on a dry shot
'08 Fit- So much go it's slow
Joined: 12 Feb 2006 Posts: 755 Location: Hilton Head Island/ Clemson, SC
Posted: Fri Oct 23, 2009 2:36 am Post subject:
I'm learning land surveying right now because I have a test on it in about 5 1/2 hours. _________________ "Here we are. We're back and we never give up." -Michael Schumacher, 7 time Formula 1 World Champion
oh, still stands though - I had wheels done up similar (though with paint) and you'd be surprised how rough tire mounting is on that kinda stuff _________________
NASA-TX Time Trial Director, Instructor
ex-CSCC President, Vice President and Secretary, member 2001-2006
When I painted mine black I took it to a good year place to swap tires and the messed the paint up a bunch. The 2nd time I took it to the honda place in Ealsey, which does amazing service. They didn't put a single scratch in the paint. _________________
107WHP ummmm.... yea it is slow
Joined: 12 Feb 2006 Posts: 755 Location: Hilton Head Island/ Clemson, SC
Posted: Fri Oct 23, 2009 11:20 am Post subject:
zps2004 wrote:
When I painted mine black I took it to a good year place to swap tires and the messed the paint up a bunch. The 2nd time I took it to the honda place in Ealsey, which does amazing service. They didn't put a single scratch in the paint.
Did you just spray your wheels and call it a day, or did you do the whole sanding, paint, clearcoat, etc. process? _________________ "Here we are. We're back and we never give up." -Michael Schumacher, 7 time Formula 1 World Champion
james i just saw your wheels in lee lots, they look good! def needs a drop now to eliminate some of the massive wheel gap _________________
1993 mustang 2.3l
^^so slow
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