Went to the Dyno : what the hell happened? Options

[lagos]

with std correction, i made
229HP and 240TQ

with SAE crrection i made
222hp 234tq at 12-13psi ...with lots of issues.....

here is a video from the dyno
http://download.yousendit.com/D176956C4A979DBC


so i finally went to the dyno for the first time ever. on my 1st run i got a shocking surprise. the car was very lean and there was a huge drop in the power curve. what the hell happened? right before the dyno, i installed some Bosch coper plugs. the store was out of NGK and i figured, it would probably be fine. boy was i wrong. can someone explain to me how sparkplugs can make my car run lean like that?

lucky for me, the dyno owner is an mr2 owner as well. he had a fresh set of NGKs so we quickly droped them in. it seemed to cure the problem. the 2nd run did a lot better, and with the 3rd and 4th run the car was getting ritcher and ritcher, to where it should be.

then i noticed another problem. before going to the dyno, i was hitting 15psi on the street. problem is, when i got on the dyno all i was seeing was about 12 maybe 13psi, and it would start to drop off to around 10psi in the higher rpm range. this was a problem i never noticed in my car before. the only thing i can think of is that my car has a boost leak, or the mbc is not doing its job.


here is the 1st run. i was shocked when i saw that.




this is the 2nd run . you can see the a/f start to get better as well as the power curve.



finally this is the 4th run. you can see the a/f is much better



This post has been edited by lagos: May 2, 2006 - 11:40 AM