 Mutha Thumprs installed/Not so happy PART 2
well we searched all over for a vacuum leak, used a smoke machine and found nuttin' sprayed carb cleaner all over/all around,...NUTTIN! It still makes a very noticeable whine, ,(similar to a SC at idle,...not quite as loud). from about 2000 RPM to about 3500 RPM. It seems to be emanating from the top center of the engine. (We installed delete plates). It runs fine tho,...used a Mustang dyno, (electro-mechanical, I think) single drum, etc. I know it's not very accurate, but I figured it will give us a baseline to use w/ further power adders. The pull numbers were: 261HP/255 Torque and an almost flat AF ratio of 12.9@3800 RPM to 12.5@5800 RPM. Any guesses how these numbers would compare to other dynos? It still bucks at 40MPH/3rd, 45MPH/4th and 60MPH 5th, but We're still trying to smooth things out using the guys at SCT and adjusting the tune parameters. Doug says he hasn't ever experienced this before, so there's hope! Still usin' way more gas too,...and it's not my foot's fault! No codes either. Cleaning the MAF next.
flyboyjack | 
