Regular Series

The numbers are lower than what I expected, but not by much. I'm not as concerned with that as I am with the huge lean spot between 4 and 5k. As you can see, it's air in, torque out. Never mind the fact that peak torque should be made 1 - 1.5k higher in the rev range.

This is my 98 Integra RS. The only "power" mods are the CAI and cat-back. There are no codes. I would expect a stock engine to put out these numbers (again, the lean spot is more of a concern - I think addressing that will improve overall output). I know, I know...it's stupid to speculate on dyno numbers.

Anyway, I plan on doing the following tomorrow:

clean air filter (it's only been about a year, but it gets dirty fast)
change fuel filter (it's been 50k since I did that ) - DONE
clean MAP and IAT sensors - IAT DONE - I can't get the MAP loose. The IAT had a pretty generous coat of oil on it too.
clean throttle body
clean intake tubing (I think I over-oiled the filter last time ) - DONE
replace spark plugs (probably not at fault, but it's $8 and 15 minutes of time)

Does anybody have any more suggestions? Has somebody encountered a weird, isolated lean spot like this before?


Modified by Regular Series at 6:50 PM 4/16/2006


Modified by Regular Series at 6:51 PM 4/16/2006

RuskeR

Everything you mentioned should help a little.

Regular Series

*bump* for more suggestions. I tried cleaning my filter last night but it's still dark brown. Do K&Ns ever get REALLY clean?

Cap'N_Kirk2.0

It looks normal to me so I wouldn't worry about the lean spot. On my dyno runs between max and min power runs total of 3 runs, I get about .5 dif in fuel r/s in certain areas. At 5500rpm for prelude vtec it gets to about 14, but with about 145000 miles on it, it's all good. . Your torque hump probably has more to do with the CAI and cat-back then the dip with your fuel r/s witch looks like 13.5. If you blank out the hump on your graph it does not look like there is a dip.


Modified by Cap'N_Kirk2.0 at 11:05 AM 5/10/2006