Sound about right?
 

Ok, I went back to the track yesterday with the following having been added since the last time I was out:

4.10's, 90/10's, 505's, subframes, front swaybar removed.

My previous best run at this track was a 13.88 @ 96.6 with a 1.81 60'. The best I pulled off yesterday was a 13.81 @ 98.07 with a 1.860 on that run, and a best 60' of 1.821. All 7 of my runs had a 1.8xx 60' time so I was very consistent with those. 3 of my runs were 13.814 @ 98.07, 13.816 @ 98.02, and 13.836 @ 98.01. To me these were pretty consistent runs, but not what I was hoping for on an overall gain. I was running the 3.55's prior to this.

After thinking about it, I feel happier with the consistency of the car, rather than hitting a 13.6 like I wanted. Do these new times sound right, along with the consistancy, for the mods that I added, or do you think something may be wrong? Keep in mind I am running at 4,100 feet, so the times will be slower than what most think they should be. The best run corrected for sea level would have been a 13.11 @ 103.xx. Any input is greatly appreciated.

Chris

Sorry, forgot to add that I am running Goodyear 27x10x15 stock tire slicks. I don't think they are 10" wide, because I had them sitting next to some 26x10.5x15 ET Streets and these Goodyears made the ET's look like spare tires.

Chris

Even though the 60ft were close to the same, did it seem to be spinning worse?

It did feel as if the tires were breaking loose a little more than they used to, but I had these bigfoot tires mounted on my 10 holes, and I didn't feel safe running the 11psi as it was, let alone a little less. These tires are a fairly hard compound, so there didn't seem to be much give. But I absolutley loved the way the car launched with the 90/10's and the sway bar gone!

Chris

It is possiable to have spun worse with the new gear, and wind up with a 60ft close to before and not acually pick up and ET. You think you like the launch, put some 4cyl springs up front, you will be cleaning your pants.

Exen with you being @ 4100 ft your times seem slow to me. Specifically your mph.

The altitude density of the air at West Texas Raceway Park is anywhere from 2800-6000ft depending on the conditions.

I was running a 13.66 @102mph in a convertible 88GT with bolt ons gears and ported heads @3000ft.

Something doesnt seem right to me.

Where in NM are you Odessa is close to the New Mexico border

I am in Las Cruces, the southern part of the state. We took a GPS out to the track to get our elevation. I actually have some 4 cyl springs, but because my spring isolators were shot, we didn;t put them in. As soon as I buy some new ones, I'll throw these on the car. I think the times are kind of slow too, but its not off much from what other cars run compared to what they should run. A buddy has a Z-06 and the best he has pulled off is like a 12.9. The car feels like it runs out of breath just after 5000 rpm, so thats where I shift. Any other ideas?

Chris

How much boost are you getting out of your Super charger @4100ft?

On a good cold day, I am lucky to see about 4.5 psi. I added a smaller blower pulley (1/4") and that brought it up to the 4.5 psi. I was seeing about 4 psi before that.

Chris

Man that explains alot. Knowing that your only getting 4.5 lbs of boost. Your times do sound about right.

See, and with that being said, I don't think the conversion times would be right either. Yes its a rough estimate, but I don't think the conversion takes into account for boost either. I just need to get the car to sea level and make a few runs. I could only imagine how much fun that would be. I know there is quite a difference when I drive to visit my parents and they're at about 1300 ft.

Chris

Yeah most guys are able to achieve 8-10 psi of boost with a Novi 1000 and a pulley.

Ever think of this, Nitrous is great for us guys at a high elevation. Oxygen is a buy product of Nitrous which pretty much negates the fact that you are at 4100ft.

Nitrous knocks off a butt load of time at high elevation. My brother knocked a second off of his best ET with a 50 shot.

Thats the route I am going,