Time Slips

As you can see I have broken the times down so that we can see how modifications effected performance. In general, I didn't go to the track unless I had a mod to test out, and that is obvious by looking at the dates and mods.

In an effort to filter out variations in driving, and give some kind of meaningful data, I have included an average for each visit to the track. I've excluded certain runs from the averages because they would have skewed the numbers making them useless. Things such as passengers, bad launches and bad shifting choices do effect my times in a real manner, but they need to be ignored if we are to gleam any real info from the times concerning modification effects. Where I have excluded a run from the average it has been noted. If you have a problem with my choices feel free to make your case. I will listen. In some cases, the exclusion of times actually reduced the "perceived benefit" of a later mod. Remember I am just trying to make the comparisons valid, not make my times look better than they are. Otherwise, I wouldn't even have posted the "bad" times :)

Something to notice in the time slips from 31 Oct 97:
For those runs with which I had my new exhaust, you can see that I dropped my ET and raised my trap speed (93 to 95.5 mph) significantly. However, if you study things closely you will see that the speed gained in the last half of the run is nearly the same as before the exhaust install (18.86 to 19.5 mph), and that most of the speed I gained can be attributed to the first half of the run (72.8 to 76.1 mph). I have some excel spreadsheet charts that better illustrate this. I just haven't been bothered to put then on the web yet.

What Does this mean? . . . Well after talking with a few people who have been around longer than me, we all came to the same conclusion. With the small Garrett T25 turbo, there is very little top end power you can squeeze out of it. What this mean is any gains from exhaust and intake mods manifests themselves in better spool-up which only effect the first half of the track where all the shifting occurs. Someone asked me, "Could it just be that your shifting better?" Well that is possible but if you look at the other time slips you can see that my shifting is basically consistent, and that if you compare equal 60ft times with and without the exhaust the theory still hold true. Besides that is what the averages are for . . to try and eliminate variances in my driving. Not to mention that it doesn't take a brain surgeon to stay at WOT in 3rd gear till the finish line :) So a turbo upgrade is definitely the next step. Of course full porting of the exhaust manifold and O2 housing will also occur before the new turbo. This probably won't help the T25 much, but it will get the car ready for the new turbo, which just might be a ported 14b for money reasons unless I can find a used 16g or Super60/T28. I think I can get over 100 MPH and pull low 13's with just the 14b. Anyone else wanna take a guess??

Ok so I now have the 16g. something a lot of you seem to have been waiting to here about. I will say this. It is FAST. But not as fast as it could be. to put it simply I AM RUNNING RICH . .VERY RICH. So rich that I ran a SLOWER trap at 20 psi than I did at 17 psi. I have an APEXi S-AFC on the way and access to CarComp the OBDII monitoring software, and plan on using them both to tune this baby just right. then I should be flying. I have also gotten into AutoX. I had a chance to drive with both the T25 and the 16g. I am not sure about clipped 16g's but this ported/unclipped 16g doesn't feel too bad on the track. There is no doubt my driving, tires and suspension (in that order) are holding me back more than the turbo :)

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
1	1.782	2.291	6.370	9.737	73.63	12.571	15.147	88.60
2	1.055	2.112	6.199	9.634	72.45	12.508	15.135	86.80
3	.769	2.479	6.681	10.147	71.78	13.012	15.605	88.13
4	.730	2.293	6.453	9.905	71.84	12.799	15.433	86.70
5	1.122	2.294	6.469	9.935	71.65	12.780	15.324	91.18	Didn't shift into 4th for the rest of the day
6	.842	2.291	6.431	9.890	71.65	12.739	15.289	90.91
7	.758	2.232	6.437	9.886	71.89	12.731	15.283	90.90
8	.775	2.095	6.221	9.692	71.50	12.549	15.106	89.25
9	.804	2.238	6.398	9.841	72.07	12.681	15.223	89.82
10	.654	2.085	6.114	9.517	72.67	12.337	14.874	91.27	WOO HOO . . . 14's
11	.740	2.047	6.166	9.600	72.09	12.431	14.968	91.37	Woo Hoo . . . . I backed it up
12	.677	2.134	6.247	9.718	71.43	12.588	15.162	88.70	Had a 120lb Passenger
13	.702	2.145	6.263	9.758	71.32	12.628	15.195	88.98	Had a 120lb Passenger
14	.718	2.182	6.301	9.741	71.72	12.589	15.139	90.96	Had a 120lb Passenger
15	.704	2.078	6.202	9.623	72.27	12.451	14.986	91.40	No passenger this time can't you tell :)
X	.754	2.152	6.281	9.721	72.02	12.560	15.104	90.7	Average (I have excluded the first runs in which I shifted into 4th and the ones with the pax because they would not give an accurate indication of the cars performance)

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
16	.838	2.102	6.123	9.563	70.03	12.516	15.027	89.28	Came right off the highway to the lane
17	.776	2.099	6.063	9.382	74.36	12.223	14.630	93.20	Now that is more like it - .244 improvement
18	.761	2.129	6.118	9.438	74.49	12.272	14.677	92.87	Beat an old Z28 :)
19	.751	2.095	6.061	9.401	74.22	12.243	14.654	92.94	I would say that is consistent (c:
X	.763	2.108	6.081	9.407	74.36	12.246	14.654	93.00	AVERAGE (excludes first run which is an obvious outlier)

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
20	.820	1.946	5.912	9.215	75.08		14.480	92.79	YES . . . Finally a sub-2.0 60' . . . and a new personal best :)
21	.991	1.970	5.952	9.261	74.95		14.514	93.19	A new best MPH . . . I NEED a cat-back NOW
X	.905	1.958	5.932	9.238	75.01		14.497	92.99	AVERAGE (A sample of two isn't very good though)

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
22	.480	2.112	6.017	9.329	73.33	12.135	14.538	93.11	Stomped some V8 w/o an exhaust . . . he was VERY cocky
23	.617	1.896	5.780	9.078	74.41	11.905	14.302	93.57	My best run ever, best 60', ET, and trap speed !!!!!
24	.931	1.909	5.783	9.104	73.17	11.917	14.327	92.77	Good enough to back it up, but almost a full MPH slower??
25	.823	2.127	6.077	9.436	72.62	12.259	14.702	92.16	Bogged the launched, shifted into 4th . . . Bad choice
X	.676	1.972	5.860	9.170	73.64	11.986	14.389	93.15	AVERAGE (again I'm excluding the last run because I shifted into 4th and that would represent the real performance of the car)

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
26	.597	2.165	6.114	9.382	75.93	12.159	14.551	93.42	Used these shift point: 7000, 6500, 6200
27	.601	2.049	5.887	9.114	76.18	11.879	14.225	95.58	Used these shift points: 7000, 7000 (same for the rest of the night) Raced a del Sol who turned a 14.9 . . . his RT was a .111 and he almost beat me across the line. Not too bad for a del Sol though
28	.600	2.091	5.928	9.171	75.28	11.905	14.248	95.69	Still can't get my launch down
29	.531	1.973	5.821	9.052	76.53	11.807	14.142	96.07	Looking good for 13's Beat a 97 Formula V8 with headers :) He had a 14.442@99.35 Our RT's were very close but his 60' sucked.
30	.591	1.939	5.796	9.057	74.85	11.807	14.169	94.74	Didn't shift as fast as usual
31	.669	1.882	5.69	8.915	76.79	11.662	13.995	96.15	Need I say more !!!!!!! Oh and this is all on a stock clutch too
32	.508	1.981	5.813	9.031	76.92	11.773	14.102	96.29	Look at that MPH. I Beat a guy with a 13.972@103.69 across the line because I out drove him with my RT . . . he was pissed because he was trying and got a .778 RT . . . ROFL
33	.603	1.990	5.809	9.026	76.89	11.765	14.087	96.38	Another MPH improvement. This car is a 13.9x car, but I'm a 14.1x driver
X	.586	1.986	5.820	9.052	76.20	11.800	14.138	95.84	Average (Doesn't include the first run which used bad shift points skewing the averages)

Note: I was having some really bad problems with controlling boost. I was getting bad bad creep and I even tried porting things more to no avail. It turned out to be my wastegate actuator rod was rubbing the lower heat shield. So for these runs I was getting slow slow spool and 16psi. I tested for 3 hours to get the bleeder/restrictor combo to not creep and spool relatively well. Spool still sucked, and it along with creep, we both dependant on what rpm I went WOT.

Also my 2nd gear was trashed but I didn't know this till my first run at the track. On the street it worked fine, until after the strip. It died faster and faster and 2 weeks later I had a new tranny and a new OEM clutch disc and pressure plate. The plate and the disc were pretty well beat up but still pulled me some nice launches on this day (once I learned how to launch again :)

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
34	.928	2.031	6.246	9.491	77.04		14.475	97.63	Um . .think I can learn how to launch, I was getting some serious crunch in 2nd gear
35	.504	2.042	5.996	9.119	77.57		14.160	98.69	More fun with launching. Hey it has been a few months. OK now 2nd gear is just toast. For all runs after this 2nd gear grinds like a bitch and I am double clutching
36	.574	1.901	5.727	8.877			13.781	99.08	Ahh . .back under 2.0 . . .AND a new record (ET and trap) . . things are looking up. Not bad for slow spool and double clutching 2nd gear. I raced a 1998 z28 on this run. His friend came up to one of my friends afterwards and asked "WTF does your friend have in there? A V6 turbo . . . he just SMOKED my buddy and he has a drag rear end." . . . his buddy had run a 14.260@102.58
37	.791	1.896	5.669	8.833	80.08		13.722	98.87	This just keeps getting better, and I am back in the saddle with the launches
38	.696	1.903	5.677	8.822	79.79		13.715	99.55	HAHAHA now I am really getting happy :)
39	.789	1.879	5.742	8.869	80.24		13.721	100.25	BWAAAAA record launch AND record trap speed
40	.607	1.958	5.190	8.889	80.63		13.741	100.69	DOH . . it just keeps getting faster :p AND I won a bet for a beer with Jason Allerding for best launch, since he had a T25 and racing for ET wouldn't be fair :)
X	.692	1.904	5.722	8.857	80.18		13.736	99.74	Average (Doesn't include the first two runs since I couldn't shift for shit)

Um . . . let just say this new clutch minus the clutch restrictor GRABS . . . I couldn't launch the car worth a damn. Every time I bogged no matter what. I need to slow my foot down now that the restrictor isn't doing it for me. I had to leave early so I only got two runs in. :(

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
41	.809	2.023	5.993	9.202	77.32		14.211	96.74	SHADUP . . I don't want to here it.
42	.601	2.287	6.266	9.468	77.84		14.498	96.78	OK I will NOT tell you again, laugh one more time and I will KICK YOUR ASS :)
									I'm not even going to waste my time with an average . . . the average of shit is still SHIT

Ok . . . so I am still in search of the part of my brain that controls launching . . . I seem to have misplaced it/

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
43	.422	2.062	5.908	9.091	77.07	11.753	14.052	97.76	This is at 20 psi and 114 race gas. I was Running VERY VERY RICH . .like 1.0 on the voltmeter. Looks like the rewired fuel pump is holding up well.
44	.519	1.918	5.721	8.884	77.721	11.533	13.839	98.07	OK, now that is a little better . . . but I'm still running slow than the first time. Again 20psi. It has cooled off and I am now getting fuel cut.
45	.567	1.921	5.963	9.249	75.99	11.976	14.248	98.22	ARRRGGGGG. Lowered the boost to 19 psi to help fuel cut. I am still getting it but I stayed on the gas and it just cut once; enough to lower boost and carry on, then cut again on the shift.
46	.554	2.098	5.999	9.171	78.21	11.841	14.107	98.70	This was at 17 psi. No fuel cut and NO DROP IN SPEED. Do you see now why I need a fuel controller. Fuel ratio is still 1.0
47	.683	2.098	6.001	9.187	77.38	11.828	14.063	101.56	Ok this was at like 16 psi and I stayed in 3rd gear to the line. I was this \|\| close to the rev limiter. I think it was a timing error, BUT later track times are close enough to think maybe the car was just running a bit leaner and all the planets happened to be in line
X	.549	2.019	5.918	9.116	77.17	11.780	14.062	98.86	Average (All runs are counted, since they all equally suck,)

Um . . . need I say how happy I was :) The only problem . . . I kept running against all these FAST purpose built-trailer queen drag cars. I'm not talking some mustang that can't idle with slicks. . . I'm talking amateur NHRA drag cars. You can just imagine the how it feelum . .i have NO idea dus to run against a 9 SECOND CAR. He was at the end of the track as I was passing the 1/8 mile marker and was going 139.77 MPH. Did I mention he pulled a 1.324 launch. It was truly comical. That just summed up he cars I ran against. No one really seemed to want to race me. they would line up behind me rather than fill up the lane next to me. Coincidence ?

#	R/T	60'	330'	1/8	MPH	990'	1/4	MPH	Notes
48	.643	2.057	5.937	9.122	77.83		14.092	99.59	This is at 17psi and BP 93
49	.713	1.894	5.698	8.816	79.39		13.708	99.32	[grin]
50	.540	1.912	5.780	8.923	78.92		13.827	96.73
51	.662	1.902	5.748	8.906	79.21		13.889	97.81	Ok not too bad so far . .but still not up to the level of my first 16g track visit. The trap speeds just aren't great. But my launching is feeling better. . . but not great yet. I still need to master this new clutch with the restrictor removed. It grabs so darned fast now
52	.817	1.863	5.643	8.804	79.49		13.901	92.77	Um . .this felt like SUCH a great run . .and I tried to shift REALLY fast into 4th . .guess what happened . . .:( still not a bad time for such a shitty trap. OH did I mention this is a new best for me on the launch WAAAHOOOO
53	.726	1.799	5.587	8.741	78.81		13.663	100.45	[grin] need I say more. Well how about I had to run against a 11 second car for this run. He pulled a 1.528 launch and 116 mph.
X	.683	1.904	5.732	8.885	78.94		13.847	98.78	Average (just the 92 mph is ignored)