Today I went to the dyno to do some baseline tuning and to see where the car was at as far as the air/fuel ratio was concerned and boy did I look stupid. Remember how I bragged about how I haven't changed the spark plugs in 2 years. well it cam eback to haunt me today. I always wondered why the car would throw a trail of funny looking smoke when I got on into good boost, but never really worried about it too much to the point whereas I needed to tune the car up. Well, my 1st pull at 15psi netted 294whp and I think around 241lb/ft of tq. Not bad, right? So I did 2 more pulls without screwing with parameters and netted about the same thing. Running a bit rich in the upper RPM band, I removed about 3% from 4500rpm to 9750rpm and the car stayed the same. A/F ratio got a tad bit better, but still not over 300@15psi.
To make this story a bit shorter, on my 12th pull I adjusted the rpm timing some 2 degrees in the engines sweet area (5000rpm to 7500rpm) and netted 306.6whp@15psi. Still pretty upset because I know the car can do better, I cranked the boost up to 18psi and netted 286whp (lost power); so I'm like
and still wondering why my exhaust smell so funny. Well, comes to find out that those 2 year old spark plugs could not burn the fuel properly and the owner of the dyno was like:tisk: and I was like I'm such a lazy ***. So it was estimated that there was about 15-20hp being lost because of poor ignition. So bottom line is, don't be lazy and tune your car on time. I suck:rant and I know better, too.
and still wondering why my exhaust smell so funny. Well, comes to find out that those 2 year old spark plugs could not burn the fuel properly and the owner of the dyno was like:tisk: and I was like I'm such a lazy ***. So it was estimated that there was about 15-20hp being lost because of poor ignition. So bottom line is, don't be lazy and tune your car on time. I suck:rant and I know better, too.
