Looks like the last test and tune for the year. Hope I'll be taking my 81 cutlass. I got the trans going and am just finishing some regular maintenance stuff tomorrow.
I PIcked up some m/t drag radials ill be trying for the first time. From what ive heard, ill try 16 psi to start and go down from there. Unless anyone has some better advice? Also not sure if i should do typical burnout like with my et drags?

 

16 is too low; you want to be 19-21psi. You don't have to kill them on the burnout, either. Wish I could make it. I might go watch some no prep, backside at Capitol tomorrow night.

 

X2 for Fleming.
I run mine at 20.

what size are they?

 

275/60/15.

 

I don't know if it matters but these are m/t et street radial pro.
t

 

on what size wheel?
You basically want to make sure they don't cup or bow.
You want and even contact patch.

Do a burn out and see if the marks look even

 

8 inch wheel

 

Well, had a great day at Cecil. Probably been 9 or 10 years since I've been. It was surprisingly crowed so only got 4 runs in. Beside regular test and tune they did a radial prep class which I guess made it really good traction for everyone.
anytime you drive your car to the track, make some decent runs and return home safe with no broken parts is a win, but i was really happy.

I started with 19 psi in my m/t radials for first run and went down to 18 for the rest.
I was trying to launch at 2500 but car was pulling thru the light on first 2 runs. This surprised me because in theory this new tci converter is rated as 3600 to 3800 stall and i believe my old b&m super holeshot was 3000 to 3500.
Third and fourth run I guess I stood on the brake hard enough and had good launches. Ran
11.71 @ 115.3
And 11.57 @ 115.5
​​​​So really happy with that 11.57, which is my personal best. Also better mph .
previous pb was 11.70 at 112.5
Not sure if improvement was due to better converter or drag radials? Or a combo of both.
best 60' was 1.60, which from memory is about as good as previous best.
I would post some pics but it says my pics are unacceptable file type.

 

 

Pay no attention to the right lane 70 nova that bkew my doors off

 

Nice!
And I agree...driving to and from with no breakage is the best day ever.

Post all the slips!

 

I'm having to edit my pics a little because they are" .heic" then when I save it converts to .jpg, which I can upload. Is this normal?

 

also please pay no attention to my atrocious reaction times. I was trying to focus on launching at an exact rpm but really didn't even do that well.

 

Wow. You blew the tires off second pass!

What other changes did you make throughout the day?
I'm surprised the trap speed varied so much.

What's the car weigh? You're making good power.

 

I weighed the car at one point at 3460. I can't remember if that was before ir after I put the rollbar in. Figure either 3700 or 3800 total with me in it

 

Common misconception that you should be able to stall a converter with the brakes. You can have a 5000 RPM converter and not push it past 2500 RPM using your brakes. Another misconception is that the torque converter just lets you bring your RPM higher to leave at a higher RPM, its way more than that. The reason for not being able to stall it on your brakes is simple, its in the name, TORQUE converter. The torque converter does just that, it takes the current torque the engine is making and multiplies it. Most good converters can multiply it 2 to 3 times higher. The closer you get to the Stall Speed the more it multiplies the torque until you reach the stall then it goes 1:1. So when you try to push the RPM up on your brakes your increasing torque to the point that your brakes cant hold it any more and you creep forward. So when you put the better TCI converter in you were probably producing more torque than your old converter at the same RPM. Now here is the part you don’t want to hear, by doing that you were probably slowing the car down and made it so inconsistent. As you try to bring the RPM up, you load the suspension up causing bad traction (common on many chassis especially A and G body cars). You are causing the axle to try and rotate in the car, pushing the left tire down but also trying to pick the right tire up. Plus, it unbalances the front end. Next time try leaving at a much lower RPM and you will notice that your runs start to become more consistent, then you can work out how to go faster. If you find that lowering your RPM the car becomes much slower there is something in your combination that is not correct or needs work.

 

Ok. Thanks guys!