'99 Alero 3400, MP90, non-intercooled, other info in sig
All runs with: 3/4 tank gas, K&N filter, 8.5x23 slicks, TOG headers, 3 inch Magnaflow CAT, 5x15 Borla muffler as resonator, SuperTrapp add-on disc packs -- 3 inch inlet 5 inch wide x 30 discs, 50/50 ethanol/H2o injection -- manually switched. Moderate cool-down between runs, 62-68 deg F ambient. Humid, air not too bad, but not the best.
185-195 deg ECT starting line temps.
---------1) 7:18 PM
First run, without alc/H2O injection,
1200 rpm launch
IAT@ IM, temp--
96* before burnout, 145* at starting line, 178* end of run
285----------------- CAR# --------------B888
+ .3029----------Reaction--------- + .2638
1.9802------------60 ft--------------2.0680
7.5160------------330 ft-------------6.0362
11.4750----------ET @ 594 ft--------8.6423
12.3770-----------1/8 ET-------------9.2162
49.89-----------1/8 MPH------------78.40
---------2) 8:17 PM
2nd run, switched on alc/H2o during burnout only,
1200 rpm launch
IAT@ IM, temp--
91* before burnout, 91* at starting line, 142* end of run
B888----------------- CAR# --------------321
+ .2638----------Reaction--------- + .3809
1.9343------------60 ft--------------2.1098
5.5252------------330 ft-------------6.0801
7.9292----------ET @ 594 ft--------8.7961
8.4712-----------1/8 ET-------------9.3971
83.02-----------1/8 MPH------------74.87
--------3) 9:01 PM
3rd run, switched on alc/H2o during burnout and for a 2-second burst after launch,
more aggressive burnout, 1400 rpm launch
96* before burnout, 94* at starting line, 148* end of run
+.2619.... Reaction
1.9560.... 60 ft
5.5880.... 330 ft
8.0121.... ET @ 594 ft
8.5571.... 1/8 ET
82.56.... 1/8 MPH
--------4) 9:47 PM
4th run, switched on alc/H2o during burnout only
aggressive burnout, 1600-1800 rpm launch
92* before burnout, 96* at starting line, 152* end of run
(here launch rpm was higher than it needed to be, and so intake temp was raised slightly)
+.2619.... Reaction
1.9739.... 60 ft
5.6419.... 330 ft
8.08111.... ET @ 594 ft
8.6272.... 1/8 ET
82.41.... 1/8 MPH
I have not heard the present exhaust system from outside the car, but a spectator told me it sounds good, as in "all you can hear is the blower." That's at WOT. It is loud at idle and midrange rpms. Growls and some droning, more so with windows down, but no rasp that I can hear. Upper-mid rpms need improvement in sound, as heard from inside the car. Anxious to hear it from the outside.
