I wanted to run at the track to verify the dyno results I got from the MACs and the Hooker catback.

I had a chance to run my car tonight, Once. Gains: 4 MPH, and 0.7 sec. I only got ONE run in tonight , and I just planned on it being a warmup run, but it ended up being my only run. I probably could have shaved at least another 2 tenths off. I didn't have much time, and a car broke in each lane spilling parts and oil. I couldn't wait for them to clean it all up.

Here is my old 1/4 mile time:
Mods: CAI, Everything else bone stock
Weather conditions: 86 degrees, 80% humidity
60' 2.2 sec
1/8 Time 9.4 sec
1/8 MPH 76.9 MPH
1/4 Time 14.5
1/4 MPH 97.9

New 1/4 mile times:
Weather conditions: 87 degrees, 50% humidity
-Mods Bad for 1/4 times since previous times:
+30 lbs from new front sway bar and sub frame connectors.
Went from 16" stock rims with 245/50-16's to 17" SS rims with 275/40-17's
-Mods Good for 1/4 times since previous times:
MAC Mid Headers and Hooker Catback

60' 2.15 sec
1/8 Time 9.0 sec
1/8 MPH 81.6 MPH
1/4 Time 13.8
1/4 MPH 101.8

As you can see, the weather was nearly identical. (It SUCKED both times )

I'm very happy to see a solid 4 MPH gain. Looking forward to mid to low 13's with better weather and a chance for better 60' times. Yeah baby.

Dan

 

Nice Times! I just got done with my hooker headers and hope to get some similiar times as well.

Also, have you done any tune up stuff since your last 14.5? That time seems to be pretty high for a z28, especially since stock z's are rated at 14.1-14.3 stock.

Either way, it looks like you're blazin now!

 

regards for his first times bein a lil high!, wel my first time to track i ran 14.5 at 95mph! and that was my quickest time of that night. my slowest run was 14.8 at 94 mph! so dont feel bad bro, atleast ur runnin quite faster now.

 

I'm curious as to why my car runs 14.2 @ 104 with basically the same bolt ons? Thats with a 2.5 60'

 

Actually, the car was running good during the last run. Only tune up change was new plugs. If you look at my MPH, it was right where it should be. It's just that the weather sucked, and my 60' times weren't great, and I'm at full weight with stereo equipment also.(it was my 1st time to the track, and tonight was the 2nd) Corrected to normal weather, the old time was 14.0@100.

Dan

 

That's a great MPH for the same mods. What was the weather? MPH is much more dependant on HP, and not so much on how good you launch.

The 14.2 is from the crappy 2.5 60' (no offense). Take that down to a 2.2 and you are at about 13.6

Dan

 

2.5 60' is your problem. You must be spinning. What kind of tires are you running? Do you have an auto or M6? Launching correctly is very hard.


Mark

 

Very nice gains Dan. I have always wondered how I would do at the track
as a beginner with the M6. Too bad you were only able to get one run in.
I hope to dyno in the next two weeks and I'm very interested to see what
the bottom line is for the 227. I do not have a convienent track to run the
1/4 so that will have to wait.

Please describe your launch for the 2.15 60'.

 

Thanks for the reply.

The last time at the track, I kept bogging the launch because the track is so sticky compared to the street. I went out this afternoon(on a deserted street) and tried different RPM's to launch from. It turned out that 3500 RPM was a good launch point for me. I bring it up to 3500 RPM and quickly release the clutch. I don't "drop the clutch", but I release it quickly, almost like dropping the clutch, but not quite as severe. I wanted to see what RPM it would take to release the clutch quickly without bogging. For me, it's 3500 RPM. I hold the throttle at 3500 RPM and release the clutch quickly. When the car is moving well, I press the gas all the way to the floor. It's kind of hard to explain. Every car is different. With my stock clutch, at 64k miles, and with my mods, this is the approximate RPM to launch at for me without bogging.

Dan

 

FYI The first time I went to the drag strip I burned up my clutch. That was kinda costly. My stage II clutch has been to the strip several times and held up well. I still haven't mastered the launch. Automatics have it a lot easier.

Mark

 

Dan,

Thanks for the launch description. I have tried on the street and have never
achieved a repeatable "good" launch. I either bog the car or fry the tires. I
have not even tried with the 227 and 3.73 gears. Although the 315s stick
really well, I'm sure my first track launch will be a good laugh.

Plus the only track within a reasonable distance is at elevation 2,710 and
in the desert.

 

STEREOMAN, I am going to put up my time improvements within a week, you already know I did the same setup as yours. Let's see if the weather is good, then we can have some time comparisions, I am at 3800 Elevation though.

 

Its intimidating the first time to the track, and I've only been there twice now. It sounds corny, but practice makes perfect. The first time at the track, I only had two o.k. launches out of about ten tries. Just try to forget about everything else and don't feel like you have to impress anyone, or beat the guy in the next lane. Believe me, when you go there, there will be cars that would make any street car look slow.

Sounds great. Best of luck. As long as the runs are made at the same track, then you could compare times. Yes, the 3800 ft elevation robs your times, but at least you'll be able to see the gains that you got. That's all I was after too, plus it's nice seeing a trap that's in triple digits.

Dan

 

Your et & mph difference are most likely due to the fact that you have a Firehawk which has ramair plus didn't those come stock with 3.42's I didn't see gears in his sig so he probably has 3.23's and Camaros are not as aerodynamic as Firebirds as long as their head lights aren't on.

 

If you are referring to me, I'm an M6 with the stock 3.42's.

Dan