Originally Posted by stream' post='241476' date='Feb 16 2006, 07:13 PM

You'll never know until it happens to your car. Sure, Dinan, and dealers who sell their parts, will tell you--don't worry, you'll be OK, but if you carefully read Dinan's warranty, they've certainly covered themselves. Caveat Emptor!

The installation of Dinan Performance Products and systems may affect the vehicle manufacturer's new car limited warranty. The vehicle manufacturer's new car limited warranty may not apply to modifications to a vehicle or the installation of any performance accessories or components attached to the vehicle which substantially alter the original engineering and/or operating specifications or which result in damage to other original vehicle manufacturer's components.

Originally Posted by ipse dixit' post='241483' date='Feb 16 2006, 07:16 PM

Originally Posted by Znod' post='241568' date='Feb 16 2006, 06:44 PM

Couldn't the same thing be said of the BMW warranty? Aren't statements convering, in effect, the same ground as the one above needed to avoid claims related to customer error or abuse?

Originally Posted by ipse dixit' post='241624' date='Feb 17 2006, 12:09 AM

But the difference, and this is not minor, with the BMW warranty and the discretion it affords BMW to acknowledge a warranty claim is that BMW cannot say, "well, the problem was due to a Dinan mod."

Originally Posted by Centurion' post='241870

A few things I noted:

The test with mods 'off' was an averaged figure of 11 runs vs. mods 'on' at 6 runs. To be fair, equal number of runs should be compared. When the result we're looking at is at thousandths or hundred thousandths of a second, that can make a significant enough difference. This is easily remedied...grab the first 6 figures you got for mods 'off' and use those in your comparison (ignore, for now, the last 5 you gathered).

Were you in the same program for your Steptronic? If you shifted manually, this may introduce another variable. DSC on/off?

Originally Posted by Centurion' post='241870

I think the most interesting find here is how the unmodded car is quicker from the start but the modded car is just barely quicker to the quarter mile. This leads me to believe the exhaust and throttle body may be more effective at top end. Perhaps a 40-60mph (in 6th gear) test may have more significant results.

Just trying to help. Oh, and by the way, how are you removing and re-installing your B&B? A welder have you?

Originally Posted by Don Juan' post='241905' date='Feb 17 2006, 02:21 PM

I guess mods inow days are just for looks and sound UNLESS is accompanied by a software upgrade..which I'm waiting for my local performance shop to develop as they tuned my M3s and man it was a huge difference from stock and dinan which i did prior their software upgrade...

Originally Posted by Znod' post='241923' date='Feb 17 2006, 03:29 PM

I don't have more time to tidy the chart below up now. I'll fix it better later. I think things on it can be made out.
Hi Penny: You are very welcome.
Actually, my numbering system may not mean much sometimes, but, in this case, the total of 11 runs was about half and half. The data I presented is the average for the 3 best mods-on runs versus the three best mods-off runs. And, I held everything imaginable constant--including all shifting procedures. Check the write up; I think it explains, or certainly implies, that I held everything constant.
Yes, but I'm not going to spend the bucks on dyno testing. And, I am extremely satisfied with the abilities of g-meters to measure things relatively at least.
I greatly appreciate you helpfulness and willingness to think about the issue at hand. You might have turned the chart upside down though. The modded car seems a bit faster all the way to 50, but some of its apparent "quickerness" is a function of one outlier start for the modded car. And, the unmodded car is faster beyond 60--although the average trap speed is a tad faster for the modded car. Again, these results are partially function of the best modded car run--which is an outlier on several dimensions. I did one run today--with the following main results.

1/4 time......13.787
1/4 speed....102.71
1/8 time........8.940
1/8 speed....81.389
0-60.............5.300

Given these results the 3 best runs for the unmodded car are beginning to make it appear that the mods actually were hurting a tad, but another explanation is possible. Below are the current results for the unmodded car. Among other things, note that the unmodded car's average trap speed now is higher for the 1/4.
.........................Test 9.Test 10.Test 12...Avg
1/4 Mile Time.....13.793.13.819..13.787..13.800
1/8 Mile Time.......8.957..8.960....8.940....8.952
0-100................13.034.13.178..13.078..13.097
0-90..................10.569..10.678.10.604..10.617
0-80....................8.705...8.767...8.700....8.7 24
0-70....................7.013...7.043...6.982....7.0 13
0-60....................5.300...5.322...5.300....5.3 07
0-50....................4.064...4.064..4.040....4.05 6
0-40....................2.972...2.955..2.946....2.95 8
0-30....................1.767...1.776..1.769....1.77 1
0-20....................1.004...1.001..1.000....1.00 2
0-10....................0.364...0.326...0.325...0.33 8
1/8 Mile Speed....81.463 81.130 81.389 81.327
1/4 Mile Speed 102.970 102.550 102.710 102.743

Originally Posted by grogan545' post='241980

I think it's hard to make a case that the mods were worth any horsepower.The differences are so minor that the could be due to weather conditions or minute differences at the start.

Originally Posted by grogan545' post='241980' date='Feb 17 2006, 05:15 PM

Bottom line is until we figure out why your times have slowed after the 20.01 update we won't be able to make a rational judgement on wether the mods were of any power value.