Topic: Time to freshen up the F Model bracket bike

[scottly]

You still cut a 10.6 ET, right?

[dragracer]

You still cut a 10.6 ET, right?
[/quote

You still cut a 10.6 ET, right?

Yes sir. I adjusted my dial in to match the bikes performance.

[dragracer]

Sixty foot times were a direct indication of a problem.

[scottly]

What was your best ever ET with the current combo? If your ET had increased a lot, a tear-down/autopsy might be in order.  60' times might be more of a pilot issue than a hardware issue.

[dragracer]

Pilot made adjustments to soften up his launch technique due to the bike's mechanical condition at the time. I lowered the launch rpms. Netted 60's ranging from 1.51-1.55.

[Bill/BentON Racing]

Z pilot ain't got no issues when it comes to 60ft/ clutch management!  Frank's got this!! Lol, Bill

[gschuld]

Also have unnamed potential sponsor waiting in the background for a set of custom pistons to match an F model head.

That sounds like a deal.  I'd jump on it....   What are you waiting for Willis?

George

[dragracer]

Also have unnamed potential sponsor waiting in the background for a set of custom pistons to match an F model head.

That sounds like a deal.  I'd jump on it....   What are you waiting for Willis?

George

Hard headed, stubborn, . Oh wait, that's Bill I'm describing. Lol. Fits me also.

[Bill/BentON Racing]

We've always, me and you, been people who usally played the hand we dealt without complaints. I feel so pleased that it did it and the best thing........the camaraderie and friends I've made, thanks to all. Yo checks in da mail!  Lol,  Bill

[scottly]

Z pilot ain't got no issues when it comes to 60ft/ clutch management!  Frank's got this!! Lol, Bill

Hey, I was very careful not to use the phrase "pilot error"! A softer launch would give a longer 60ft time, but the bike still pulled strong after that.
Frank, you have a strong running, predictable bike, and you obviously have the pilot skills to win with it. Unless the leak-down test shows impending disaster, I would run it as is for the rest of the racing season.
PS, you don't race in the pits, on the way to staging, or even in the burn-out box. The higher temps may have made the low-speed jetting act richer, but they aren't in play too much once WFO.

[POPS 911]

Weather station said 3500' DA all day long at Memphis track surface 125 degrees  , not like at Valdosta that read - 285' DA. It's all in the DA. If Frank went to English Town or MIR on a low DA day that bike would run 10.2? ....... Joey did not run 227 mph like he did at SGMP.

[POPS 911]

With the elevation at MEMPHIS stated as 273 feet above sea level and my weather station reading 3500 ft. DA last Sunday all these SOHC should run faster at a lower DA, so BILL, FRANK and WILBER will be seeing lower number tickets ........ a DYNO pull will not give you a winning ticket just some numbers that show your efforts. Set up your SEL CLASS runs for Valdosta.  Hint : you do not push some one to a break out when you RED LIGHTED first off the line, they are running all out for a TIME RUN for the numbers.

[dragracer]

With the elevation at MEMPHIS stated as 273 feet above sea level and my weather station reading 3500 ft. DA   Hint : you do not push some one to a break out when you RED LIGHTED first off the line, they are running all out for a TIME RUN for the numbers.

Who the heck made that statement Pops?? I hope you corrected them. A red light by the slower opponent is like a free time run to set your dial in for the next round. Always run it flat out and then change the dial if necessary. Once you go red, as long as the other guy doesn't cross the centerline, he won, breakouts or not.

[scottly]

It wasn't the corrected altitude that created issues with the way the bike in the pit area and to staging or even in the burnout box. There is a problem with the motorcycle itself.

Ha Ha, I just remembered that you had just removed the entire effective flywheel. This may have had a wee effect on engine response in those conditions, as well as the launch.

[dragracer]

It wasn't the corrected altitude that created issues with the way the bike in the pit area and to staging or even in the burnout box. There is a problem with the motorcycle itself.

Ha Ha, I just remembered that you had just removed the entire effective flywheel. This may have had a wee effect on engine response in those conditions, as well as the launch.

Bike never had a flywheel since I started racing it in the late 90's. The end of the crank broke off while I was testing it in the street early on.  It was due to having left the heavy rotor on the engine and no stator inside the cover. Believe me, I know this bike like its my child, the problems I faced this past weekend were not weather related. There is something wrong either in the carburetor slow speed circuit or I'm experiencing a  electrical problem. Either way, its in the shop for a check over and its not leaving until its running right again.

[scottly]

OK, nevermind.

[dragracer]

OK, nevermind.

But hey, I could be wrong. Hang in there with me!!!

[scottly]

OK, as long as you don't get pissed off! Here are some of your previous 60' times:
4-1-15 1.555
4-4-15 1.4585 1.4728
8-21-15 1.496
Your latest 1.51 to 1.55 aren't that far off from a year ago, especially given the higher temps.

[dragracer]

Spring Cup race 2016.

[scottly]

Frank, the date on that ticket is 8-21-15, not from this spring??

[dragracer]

Oop. You're correct. My mistake for posting late.  I think I found a ticket from last year at Memphis also. Will post it later.

[MRieck]

Forgiven Frank.

[scottly]

With the elevation at MEMPHIS stated as 273 feet above sea level and my weather station reading 3500 ft. DA last Sunday

Pops, what does "DA" stand for, and what does it mean when it reads 3500 ft? Air temperature has much less effect on power than barometric pressure, and it's hard to imagine that the barometer at 273 ft would ever get as low as it normally does at 3500 ft?
The dyno is a tuning tool; properly used, it CAN help you get those win tickets.

[Bill/BentON Racing]

Density altitude,  the lower the number,  the better the air.

[dragracer]

Corrected altitude is more of a factor than temperature. It like being high in the mountains instead of at sea level. Less oxygen at 3500' than at 273'. Jetting on a carb bike is directly affected by the the presence of or absence of oxygen and can slow a bike down when the AFR is not perfect. That's why you see Pops always screaming at us about carrying a box of jets. My overall ET was adversely affected by the DA/ CA. However, it had no affect on the way my bike idled erratically.