[Mustang92]

All I can say is the best way to get your point across is to prove it with numbers. I've tried plenty of parts that felt great or in theory should make more power but in the end didn't do a thing for my car. I've been testing 4.6 parts on my car for the past three years and have found lots of useless stuff out there. Now for me the spacer didn't work the car gained a consistent .02-.03 across the board with my ET's and MPH dropped off a couple tenths. This was of course tested at the track before and after on the same day. Doesn't mean that is the case for everyone but being a frequent bracket racer I know my car very well and it didn't take to the spacer.

Something also to watch out for is comparing peak to peak power gains. Just pointing out peak gains isn't always going to show the picture of improvement. My car prior to bullitt intake made 253RWHP, 292RWTQ and ran a best of 12.89 @ 103. I added a bullitt intake and the car picked up 2 MPH and dropped 2 tenths. Next I put in longtubes and a K-member (dropped 50lbs from the car) and picked up another 2 MPH (approximately .5 -.7 from weight reduction) mostly from the longtubes. Now with the car running 12.5 @ 107 you would think powerwise it would show in the peak numbers but it didn't.

Last month I dynoed the car and my new numbers were 258RWHP and 289RWTQ, which shows only a 5RWHP gain and 3RWTQ loss. Based on that alone I should be going no faster. But when you look at the power gains below the peak and above the peak you see where the power is. At 6K RPM the car picked up 25RWHP and had gains of up to 10RWHP from 2500-4500 RPM. My car makes between 250-258RWHP from 4500 to 6000 just barely dropping off at the end. A broad power band is where it's at and is just one example of peak numbers not telling the whole story.

Okay enough of my babbling...

Bill