Thanks for your concern, and sorry to hear about your flat spots. I just got 4 new trailer tires 1K ago, and they almost got a workout yesterday when a bunch of deer ran across the road a few cars in front of us. I saw all their brake lights and tire smoke about the same time as my wife yelled look at the deer! I had plenty of time to gear down to 3rd and hit the exhaust brake. Fortunately none were hit, and things got moving again pretty quickly.

 

Check my reply to Rusty as to why none of the one's that I've seen on the internet will work very well! Since "Lightning" appears to be an F 150, I can't match your ET's because my rolling resistance and aerodynamic drag model is only for the superduty.

EDIT Talking about speed, you can see how slow my connection is at my new location, I was waiting a good 5 min to post while you responded to my last!

 

No worries!

Stewart

 

I did post #240.

Sorry those links wouldn't work.

Rusty

 

phil6608 please note, I'll need your tire diameter to do the run. In third gear, diff ratio=4.10, an RPM of about 5050 is required to match your 116 MPH using stock 31.6" dia tires. That seems like way too high of an RPM for a PSD? In fact, even in OD you'd need almost 3600 RPM for 116 MPH with a 4.10 Diff.

Actually, I don't really need it, but my final display sheet won't reflect your MPH vs RPM correctly without it. I manually input engine HP estimates for each fractional second until I get the ET's to match the measured ones. Then, for each 0.5 MPH as speed increases during a run, I display the RPM as a reference. I assume a broad power band between about 2400 to 3200 RPM, because that's what is typical from dyno runs for a PSD. If your's is different please note that as well. Your result will be posted on a new thread with something like "new improved model" in the title

I've already done a sheet for 320 max HP because that seems to have a broader range of interest to what others have. I'm going to post that sheet first (if my slow connection lets me), but it doesn't come close to matching your ET's. I just hope dialing in enough HP to match your #'s doesn't blow up my computer, which my gut feel is telling me might be what's about to happen with your PSD using nitrous.

If anyone else wants to post as many #'s as they've got for a given run, like in the above format used by phil6608, I'll do runs for those as well. Since my model updates every fraction of a second throughout the run, I can adjust the HP accordingly to match 60', 330', 660' (1/8 mi), 1000", and 1320' (1/4 mi) points exactly. Just make sure all points are from the same run, don't mix in your best from different runs as if they're all from the same run.

 

Ernest, check your PM's when you get a chance.

 

Looks like my latest update only included up post #237, so you'll be in the next one.

 

Here's my new drag race model, post your ET's here if you want an estimate of HP. https://www.ford-trucks.com/forums/635809-new-improved-drag-race-model-im-open-for-business.html