Author Topic: Manufacturers Cup, World Finals. Nov. 21-23  (Read 1647 times)

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Offline dragracer

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Manufacturers Cup, World Finals. Nov. 21-23
« on: November 16, 2025, 10:30:29 PM »
Anyone planning to come to the event this weekend as a spectator or racer?? We're all geared up to go. I'm trying to get all of our maintenance completed in the next few days and load everything up. I'm sitting in the top ten in 3 classes right now. I'm not in contention for a championship but would at least like to move up in the standing. The wife will also be racing this weekend in Pro ET. 

Stop by the pits if you make this one.

Offline dusterdude

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #1 on: November 17, 2025, 02:35:48 AM »
Good luck frank,we wont be there in person bit will be rooting for you,y'all be safe and tell gladys i said hi

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Offline dragracer

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #2 on: November 17, 2025, 03:44:08 PM »
Good luck frank,we wont be there in person bit will be rooting for you,y'all be safe and tell gladys i said hi

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I think the race will be live streamed again. Check it out if you can.

Offline dusterdude

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #3 on: November 18, 2025, 02:10:43 AM »
Sure will

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Offline dragracer

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #4 on: November 20, 2025, 12:35:25 AM »
So far it looks like Jim Trent and I will be the only SOHC racers on the property.  Jim will compete in super eliminator on his vsr bike. I'll try my luck in street ET on my F3.  I'm hoping both of us will make some rounds to finish out the season.

I'm pushed to tear down my engine in the off season.  Its held up well but I fear the internals at this point will require way more attention than necessary due to my neglect. I'm not mad, this bike has done everything I could ever ask for and more. It'll be freshened up and ready for battle in 2026. I still haven't reached my goal with this bike yet. The elusive national event win and a championship. I'm on a mission for next season

Offline dusterdude

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #5 on: November 20, 2025, 01:58:12 PM »
Give em hell frank

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Offline denward17

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #6 on: November 20, 2025, 02:28:07 PM »
Good Luck Frank!

Offline dragracer

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #7 on: November 24, 2025, 05:57:48 PM »
Quick update.  I was the only SOHC racer on the property this weekend.  I'm not certain what happened to Jim Trent as he told me he'd be there but never emerged. Hopefully everything is well with him.

The weather was pwrfect for racing g all weekend.  It did get into the 80's both days with mid to upper 60's for the lows. No rain but there was some brief overcast one day. The dew point was tricky on Friday and unfortunately may have been the cause of one on track accident by a super eliminator class rider. He was transported to the hospital and has numerous broken bones and other injuries. Thankfully there was no head trauma but he's got a very long road of recovery ahead.

As to my race experience, it was a mixed bag. I ran 3 classes to include street ET on the Honda.  I qualified #21 in supercomp on my small tire KZ dragbike. My best pass was a 9 flat on the 8.90 index. The old bike just wasn't capable of running close to the index because it's in desperate need of a freshup. Its lost 2 tenths so I'll be tearing it down for a rebuild over the Sunday. I had a stellar .008 reaction time to my opponent s .107 but a brain fade caused the bike to sputter and spit off the line. Yeap, i forgot to turn the petcock on. My day in that classwas halted on the spot.In pro ET, I experienced an electrical glitch that I simply could not chase down. My reaction times were excellent but if a bike can't make a full pass, you're just in the way. Thus my day came to an early end  with bike on sunday. With the Honda being the only bike I had left in contention, I was hoping for the best. As things advanced, I made it to the 4th round before I  had an anomaly off the starting line. The bike left great initially but began to spin within the 60 foot zone. I knew once I lost traction and forward momentum, my day was going to end at the stripe. Sure enough my opponent easily drove around me as I watched the win light come on for his lane. My race weekend came to a disappointing close but I still felt satisfied to have been mentally  and physically able to continue participating in a sport that I love.

I have a lot of work to do on the bikes over the winter time. I failed the equipment. In spite of it all, I finished in the top ten in 2 of the 3 classes and just outside of that at 11th in the other. Not my best season but I'm okay knowing I still have what it takes to compete at some level.

Offline scottly

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #8 on: November 24, 2025, 06:15:53 PM »
What times did the trusty SOHC run? ;D
Don't fix it if it ain't broke!
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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #9 on: November 24, 2025, 07:03:57 PM »
What times did the trusty SOHC run? ;D

Mid 10's Scottly. I dialed between a 10.49 to a 10.54 throughout eliminations. I haven't been hammering on it very hard so it would last until I could tear it down to freshen up. I just concentrated on consistency in order to make  to rounds.

Offline scottly

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #10 on: November 24, 2025, 08:18:49 PM »
Isn't that only a couple of tenth's off your best ever time? 8) What reaction times did you manage?
Don't fix it if it ain't broke!
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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #11 on: November 24, 2025, 09:27:37 PM »
Isn't that only a couple of tenth's off your best ever time? 8) What reaction times did you manage?
I was conservative on pushing the tree. I'm prone to redlighting for some reason so I made a decision to be certain I went green and let the race be decided at the finish line. My lights ranged from .020 to .077. That is until the last round when I lost and I had a crappie 0. 211 light. Even if the bike didn't break traction, that light would have cost me the round anyway as my opponent had a safe .070 light himself.

As to ET'S, you are correct. Its about 2 tenths off. The time slips show the true incremental story though to let me know it's wounded. The 60' times are off but so is the 1/8 mile ET and 1/4 mile time and mph. I've got nothing to prove at this point regarding the performance of this bike. Its produced some solid  10 second passes and I have national records to prove it. I just want to freshen it up so it'll be consistent and live to fight another day. As I often tell my friends, you can stop what you're doing to take it apart yourselves you see a sign of weakness, or you can keep running ut and ket the e line take itself apart. I'm going to choose the former🤣😂

Offline scottly

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #12 on: November 24, 2025, 09:46:44 PM »
You've been saying you were going to freshen it up for years now. ;D I would be concerned about the left side main bearing, if the oil passage in the end of the crank is open like I think you have said before?  Hey, you still won 3 out of 4 rounds, right?  8)
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Offline Old Scrambler

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #13 on: November 27, 2025, 09:11:39 AM »
Hello, Frank, and Happy Thanksgiving Day. I'm having turkey dinner in Phoenix with our daughter, son-in-law, and Carol's cousin.

It was good to hear you are a positive trooper for the SOHC board. I hope the 'refresh' goes well. My refresh to the CBR consists of new intake valves, guides, and some minor 'trimming' to the squish-band in the head between 10 & 11-o'clock where its a bit close to the edge of the pistons. The most expensive item will be replacing both of the chain tensioners. I hope to be ready for another run at the records in August.................your invited ;D
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
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Offline dragracer

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #14 on: November 27, 2025, 05:13:46 PM »
You've been saying you were going to freshen it up for years now. ;D I would be concerned about the left side main bearing, if the oil passage in the end of the crank is open like I think you have said before?  Hey, you still won 3 out of 4 rounds, right?  8)
My long time local machinist has been struggling with his health for a while now so i really didn't have anyone  nearby to do my machine work. Fortunately I've connected with a reputable shop in Virginia. He's done 2 of my Kawasaki heads and a GS head for me recently.  I'll be shipping the Honda head off after Christmas so he can replace the stock Honda valves with stainless. He's pretty good at find little things to increase flow so I'm hoping for the best. Even a basic valve job with new springs would be a huge bonus at this point.

I'm thinking about taking for a few dyno pulls primarily for carb tuning purposes. I've got to get a bung installed in the header and will buy a WEGO to monitor "real- time" on track passes. I know I'm leaving horsepower on the table because of improper jetting.

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #15 on: November 27, 2025, 05:19:37 PM »
You might want to do both a compression and a leak-down test before you tear the engine apart. ;)
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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #16 on: November 27, 2025, 09:16:46 PM »
You might want to do both a compression and a leak-down test before you tear the engine apart. ;)

Scottly, that would definitely be proper protocol if the loss of power happened to an engine that hasn't been run much. Thats solid advice you've offered. In my case, I've beat the crap out of this one without regular attention.  I know I'll be putting new valves in it so even if the leak down showed seeping there, it's a moot point. Everything will be sealed up after the work is done. As to seepage pass the rings, I know my bore is out of round as has been so for over 20 years. I now need to make a decision on whether to ignore it and just install new rings as I've done numerous times on previous rebuilds, or go ahead and see if it'll clean up on an overbore to 73mm. I have new 73mm Arias pistons waiting for a place to go but the dome is cut for a K model chamber. Like now with my current 72mm K pistons, I'd be giving up compression.  I'm tempted to have JE make a set of 73's for my F3 head but torn about that expenditure for a bike that'll always be the slowest thing at the dragstrip in today's world.

Decisions, decisions.!!!

Offline dusterdude

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #17 on: November 28, 2025, 02:58:47 AM »
You've been saying you were going to freshen it up for years now. ;D I would be concerned about the left side main bearing, if the oil passage in the end of the crank is open like I think you have said before?  Hey, you still won 3 out of 4 rounds, right?  8)
My long time local machinist has been struggling with his health for a while now so i really didn't have anyone  nearby to do my machine work. Fortunately I've connected with a reputable shop in Virginia. He's done 2 of my Kawasaki heads and a GS head for me recently.  I'll be shipping the Honda head off after Christmas so he can replace the stock Honda valves with stainless. He's pretty good at find little things to increase flow so I'm hoping for the best. Even a basic valve job with new springs would be a huge bonus at this point.

I'm thinking about taking for a few dyno pulls primarily for carb tuning purposes. I've got to get a bung installed in the header and will buy a WEGO to monitor "real- time" on track passes. I know I'm leaving horsepower on the table because of improper jetting.
Frank,who is your virginia guy?

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mark
1972 k1 750
1949 fl panhead
1 1/2 gl1100 goldwings
1998 cbr600 f3

Offline dragracer

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #18 on: November 28, 2025, 03:36:00 PM »
Mark,

Stephen Svec- SVEC Engineered Performance in Roanoke.
« Last Edit: November 28, 2025, 04:24:39 PM by dragracer »

Offline dusterdude

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #19 on: November 29, 2025, 01:57:03 AM »
Cool,ill keep him in mind

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1972 k1 750
1949 fl panhead
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1998 cbr600 f3

Offline Old Scrambler

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #20 on: November 29, 2025, 02:54:14 PM »
Frank...............machine a squish-band into the head and use a skinny headgasket...........also consider larger intake valves. Depending on cam profile, check valve/piston clearance and pocket size. .........Then consider sending it west for a few 'test'-runs on the big white dyno ;D ;D ;D
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
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'66 CL77 Red
'67 Triumph T100C
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Offline dragracer

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Re: Manufacturers Cup, World Finals. Nov. 21-23
« Reply #21 on: November 29, 2025, 04:34:44 PM »
Frank...............machine a squish-band into the head and use a skinny headgasket...........also consider larger intake valves. Depending on cam profile, check valve/piston clearance and pocket size. .........Then consider sending it west for a few 'test'-runs on the big white dyno ;D ;D ;D
Thanks Dennis. If I upgrade to the 73mm bore i definitely need to have the squish band done. And I do have a full set of  "Evo" Mitsubishi stainless valves (35mm/31.5mm) on hand already. The valve stem is longer than stock F3 valves which will allow for room to cut a new keeper groove.
« Last Edit: November 29, 2025, 05:29:49 PM by dragracer »