I mainly run the cat so that the noise level drops. I can't be having every cop in the neighborhood pull me over for noise. Hopefully the new exhaust system smooths that out...
I guess I came to the conclusion that if you notice my dyno graph, the reason the torque drops off so suddenly is because my VTEC is set to kick in at 4000 rpm. I think it might be better if I just turn the VTEC off on the engine computer to continue getting torque. I might sacrifice more HP in the top end, but at least I'd have the torque to carry me through to it. Hmmm...
I really do need to get new cams to stop this "valve overlap" problem. Damn you Honda! You over-engineered again!
Right, but was the dyno lambda sensor in the tail pipe? If so, that's why it was showing lean.
I'm almost positive that VTEC engaging too early isn't what's killing your torque. The curve looks fine at and past 4000rpm. If VTEC was killing the power, one would see a sudden dip at that point, but one doesn't. If anything, I would guess that VTEC was NOT engaged on that dyno you posted. At 5500 rpm (stock VTEC engagement point) the torque starts to drop off. Considering the stock torque peak is at, what, 6500rpm? it shouldn't do that.
If it's not that...your adjustable cam gears are installed, right? If so, maybe they aren't zeroed and are dialing out some valve overlap to begin with?
The only other option I see is that there is RIDICULOUS heatsoak that accumulates through the dyno pull, which kills the top end. However, I'm leaning toward VTEC not working. Try setting it to 2000rpm, or something really low, and see if it makes the engine run like a dog out of boost. If not, then something is wrong.
::EDIT:: Actually, I was just looking at some other JRSC dynos and I think that the torque dropping off is maybe just a function of the supercharger spinning so fast that it's out of it's efficiency range. Nothing some spendy porting won't fix
I happened to run across this gem on Ebay (yet another reason to shop there) and quickly snatched it up. It won't be on my car anytime soon, but for all of you that are "in the know" with Preludes, you realize just how rare this part is (or the sum of the parts that is).
What you are looking at is a JDM front bumper with JDM Fogs (aka driving lights) and the rarest of the rare, JDM corner foglights. The sweetest part about these is the fact that this option was made before Lexus ever debuted with their swiveling headlights. In the arena of safety that would allow you to see farther around a corner when you were turning to ward off any dangers you might come across a second or two sooner than if you just followed the beam of your stock headlights. With these "corner foglights" I think that as you turned the wheel, the side you were turning would activate that light and it would help light up the area just like a swiveling headlight.
I've tried to search for literature on how exactly they work, but so far I've found none explaining how they're wired up. I will continue to search for somebody with the technical know how, or enlist the help of a specialty fabricator in El Paso to see just how much I can do with them, but I'm very excited to have the opportunity to find this rare buy.
If anyone who reads this thread knows anything more about it, please let me know.
I just can't wait to throw my stock lip on it and repaint the whole thing for a truly one of a kind look!
Hey thanks for the compliments guys... by the way Brash22, if you ever have any rare stuff that the Prelude came with in Australia that you're willing to sell, let me know, I'll make you an offer!
Think about the only things we got were:
carbon look centre dash and door trim pieces standard
digital climate control.
I believe the US got split back seats, ours don't have a plastic divider.
Indicators in the front quarter panels.
Coin holder below the fog/cruise/dimmer switches.
probably other minor differences.
None of the above are Aus exclusive or rare I don't think.
Something tells me the best Prelude in the world didn't get its rash from aggressive driving.
Yeah tj....i found out the hard way that cornering hard wif a removed front swaybar as fun as it may be is not as fun when you pop out of a tight turn and swing the back end around.....sigh
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