4.10 Track Times

I would always feather the clutch and never dump the clutch
and I got good times with that technique.I got my best times
shifting at 5500-5600 rpm's.Also make sure you get those Nitto's
nice and hot so your tires will stick to the ground better.
Your racing weather looks good too.
Just go to the track and practice the most you can.
Try and get those 60' foot times down and your times
will improve.Practice makes perfect Matt! :thumb:

 

Just a question, but why would you wanna take your motor to 6500? I know you said thats after you get your top end built, so does that mean youre gonna do cobra heads and intake? just wondering...cause i dont think a PI 2 valve with cams can rev to 6500 without shooting a rod through the block.

 

Nice Matty , those times will improve with practice. Your best way to approach the launch is to feather the clutch out of the line. You need to find the point where the tires are not going to break loose and push it as close as you can without them breaking free of grip. I don't remember your dyno chart, shift point should be adjusted to try to get you into or as close to peak torque going into the next gear (generally 300 rpm before peak), this will get you thru the gears and alot for better times, however if your way up in the rpm's before shifting you will have to adjust.

I remeber you first runs and this one looks much cleaner all the way thru, Good job !!!!!!! :thumb:

 

If he has cams that take the powerband there, and springs to support it, the bottom end can take it. I shift mine at 7200.

 

Based on your graph it looks like 5500 is a good shift point for you. Unfortunately 4.10's are a poor match to your current setup and powerband. You probably have to either hit 5th or bump the rev limiter through the light's.

But, I would suggest a quick burnout to clean the tires. Slip the clutch at about 3500, and continue to experiment with the launch rpm and shift rpm on test and tune nite.

 

Really? What size tire do you run?

 

I shifted my 97gt nonpi with cams at 6500 all the time ???

 

damn your sixty foot times seem kinda high. with my auto launchin at like 1200 i pulled 2.19 and 2.10. but the elevation was alot differant. i didnt know that would make that big of a differance

 

your weather was a little off
Based on:
Temp: 77°
Humidity: 39%
Track Altitude: 5830 feet
Pressure: 29.86 in.

but it was still
Density Altitude = 8525 feet ET MPH
Uncorrected 16.136 @ 87.52
Corrected 14.06 @ 98.8

good job though I was getting worried with a 16 sec timeslip

 

weather underground and history for 8:55pm. but if your timeslip says the weather then go with that weather.

 

I run a 2.10 60' with street tires and bogging it off the line. Somethings wrong with your 60'..... or do you have a lowered car ??