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Old 06-28-2013, 11:21 AM   #1
SNSSTR
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Second time to the Strip

Hey guys, I'm just now getting around to posting about my runs because I really have some questions.

About a month ago I took my car to the drag strip for the first time and felt like I was getting a decent feel for the car. At this point the car had Stock Tires, CAI, LT Headers, PTB, and a Janetty Tune.

Granted the temps were only about 85-90 with medium amount of humidity, the best I clocked was a 12.86@110mph with a 2.2 60'. I felt there was a lot of room for improvement to possibly get into the mid-low 12's with a good launch and more practice.

Since that time, I had a cam installed (219/235 .607/.619 113LSA), 25% UD Pulley, electric exhaust cutouts, then had it re-tuned. So I thought I would definitely be hitting some low 12's and maybe even high 11's with a good 60'.

I went to the track last night, temps were around 90-95 with pretty high humidity. The best I ran was a 12.595@111.78 with a 2.066 60'. I also ran a 12.628@111.85 with a 2.129 60'. I ended up being pretty disappointed to be honest.

I know I need to work on my launch, but I definitely feel the car should be trapping more than 1 mph higher and 2 tenths faster...what do you think?

Any advice or help is certainly appreciated!
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Last edited by SNSSTR; 06-28-2013 at 11:33 AM.
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Old 06-28-2013, 11:26 AM   #2
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Go back in the late fall. When its 50 degrees. You'll never have good times in that kind of heat. If you correct your times for a DA of 2500 it's 12.2 @ 115.
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Old 06-28-2013, 11:32 AM   #3
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You can use this link to calculate the DA on the days you raced, and then you can compare. For example if on the first outing it was 1000 DA, and this time it was 3000 DA, the old rule of thumb is that every 700 increase will slow the car down by a tenth and a mph:

http://www.dragtimes.com/da-density-...t+Weather+Data
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12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
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10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800
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Old 06-28-2013, 11:37 AM   #4
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Thanks, I will have to check out that dragtimes thing. I knew that humidity and temperature would both have an effect on times but I didn't realize it would be that much.

Here's a video of the 12.595 run...I know I red lighted it and I apologize for the voices in advance lol


Last edited by SNSSTR; 06-28-2013 at 11:52 AM. Reason: added video
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Old 06-28-2013, 12:03 PM   #5
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Quote:
Originally Posted by Pro Stock John View Post
You can use this link to calculate the DA on the days you raced, and then you can compare. For example if on the first outing it was 1000 DA, and this time it was 3000 DA, the old rule of thumb is that every 700 increase will slow the car down by a tenth and a mph:

http://www.dragtimes.com/da-density-...t+Weather+Data
I checked the DA from those two days and times when I ran and actually the DA weren't too far off. 1137 the first track run before cam and all and, 1737 yesterday.

So not much difference between the two which still makes me wonder why the addition of all those upgrades only helped by really 2 tenths.
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Old 06-28-2013, 12:10 PM   #6
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When you tuned the cam where did it peak compared to stock? The MPH tells the tale for me.
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13.15@106 1.95 | 100% Stock
12.37@112 1.85 | + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune
12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
11.84@115 1.59 | + 3.91s + Race Star 17x7 Fronts
10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800
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Old 06-28-2013, 12:15 PM   #7
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To be honest, I'm not sure. I handed over the keys to the car, had the cam and pulley installed, then was told a similar cam was installed on a camaro with similar mods to mine and that they used that as a base tune, then tuned it while driving and making some WOT runs.

It was not dyno tuned so I don't have any numbers or curves to show...guess that might need to be my next step?

EDIT: there's not many shops around here I trust yet to dyno the car properly so that is why I didn't have it done initially.
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Old 06-28-2013, 12:41 PM   #8
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Your close to rhino79, if i was you I would take it to him take it to him. He is one of the best on these cars
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Old 06-28-2013, 01:41 PM   #9
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Quote:
Originally Posted by Rohdeo16 View Post
I checked the DA from those two days and times when I ran and actually the DA weren't too far off. 1137 the first track run before cam and all and, 1737 yesterday.

So not much difference between the two which still makes me wonder why the addition of all those upgrades only helped by really 2 tenths.


What track are you running at?


What time were the passes?
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Old 06-28-2013, 03:51 PM   #10
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Quote:
Originally Posted by Supercharged SS View Post
What track are you running at?


What time were the passes?
I am running at Memphis Motorsports in Memphis, TN.

First set of runs before cam was on 5/25/13 at about noon to 1.

Runs after cam were 6/27 at about 9:30pm.
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Old 06-29-2013, 12:23 PM   #11
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Rhino is great with 5th gens, good guy to have go over your tune.

I think you trapped about right for bolt-ons and low for the cam. I'd think 115-118 with the cam. Either shifting low, mechanical issues, or tune issues.
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13.15@106 1.95 | 100% Stock
12.37@112 1.85 | + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune
12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
11.84@115 1.59 | + 3.91s + Race Star 17x7 Fronts
10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800
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Old 06-29-2013, 08:54 PM   #12
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I'm going to try to go see him next week and see what he can do!
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Old 06-29-2013, 10:18 PM   #13
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You need 2 things! Get with Rhino to look over your tune, AND you need some tires. Your 60ft is what's killing you! A better DA will help improve the ET and Mph over what you are now, but if your just spinning, your car will never perform the way that it could. Stock tires will be your weak link.
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Old 06-30-2013, 09:13 PM   #14
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Get a proper tune and some drag radials. Then you should be in the 11's no problem.
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Old 07-01-2013, 01:12 PM   #15
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Thanks guys,

I am going to be getting with Rhino hopefully within the next week or two and we will see where the tuning is at. I knew I needed drag radials...those are also in the works right now
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Old 07-09-2013, 12:47 PM   #16
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Just a quick update...

I set up an appointment for the 17th to have Rhino tune my car. Definitely looking forward to getting everything set right.
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Old 07-09-2013, 12:55 PM   #17
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Sounds good! Rhino will take care of you.
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