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I sure wasn't taking issue with anything you said, Unbalanced! There was one post picking on ME about my mentioning small 1/2" to 1" track changes (from 6 and 8 inch rims). I was just saying that...

To attach real numbers to wide track kits that I referred to in earlier post: in the case of the Swift DB-1, the "wide track" modification kit increased track in the front (and thus the overall...

I'm in total agreement with Mark's assessment. Also, any small changes in track like 1/2" or even 1" will be "in the noise" as well. There are also wide track kits that some in CM solo have applied...

What is pertinent is that the UK Avon mfg. and warehouse is a model facility and may end up being purchased by someone entirely new. Goodyear has zero interest in continuing any production there nor...

Ian, that's good thinking, but typically all radial rains are moulded and do not lend themselves well to shaving down. Back when I ran bias plies, I used to get uncut Avon rains and they worked quite...

Thanks Mark. European supplier says Pirelli has suspended circuit and hillclimb for 2023, but did add if supply issues clear up, they intend to resume. Hankook's C92 (in a front 240/570R13 on my...

No surprise that proposal died.

We knew of the sensitive nature of the CM class back when I contributed to the current set of BM rules roughly 13 years ago. We knew there was no way anyone would...

I would like to find out what the characteristics of the Hankook C92 tire compound are.
Hankook calls C92 "super soft" and the C72 "Soft".
Would C92 be most like the Pirelli Supersoft (yellow...

Many years ago, before I had a B-Mod car and was running well Nationally in F-Mod, I noticed that the Pro-Solo index for B-Mod had been pushed up a lot higher than the B- Mod Solo index, making...

I think you know this already now, but there are multiple ways of looking at clarifying rules.

Yes, you are right, as option #1, the SEB/MAC is reluctant to respond to any single member asking...

Weighs less too! ;)

That's good advice from Bill and be ready for balance of car to change as you not only change rake but overall ground clearance.
You got a very nice car that had a lot of good ideas designed into...

I don't quite understand the science completely here, but have heard from several with 593's that an unexpected consequence of inlet restrictors on 2-strokes like 593 is less crankcase cooling, thus,...

Seems like this collection of well-researched ideas may solve a lot of problems.

This may be one of those times where one should resort to a more surgical study of the problem to properly find a solution.
In other words, get the list of names and contact info on those 100 old...

OK on your mission Jay, you (and I, unfortunately) are type of people who will probably die one day trying to save somebody else.

I've just tried to help by pointing out some things that might...

I agree some level increased perf. can be had for cheap.
just like people can do a 593 conversion for a whole lot less than you spent.

But why would they do any motor upgrade at all if they...

I think Eric is right on that lack of interest/participation is based on simple increased race costs that are independent of motor performance.

On top of that, no one has mentioned that a number...

OK, nice to see SCCA agrees its a good approach to not try to slow down the current "big motor" participants.

Some comments on restrictors.
You will see where it leads in a moment.
The current...

People aren't thinking this through.

The equal HP 493 (to 494) would need help same time as 494 since there are a lot of those cars around as well.

And of the 2 , the 493 is the more modern and...

This is a very simple question with a very limited number of acceptable answers.

Classic answers to pick from:
You either make the fast guys slower or the slow guys faster.
Making the slow...

On the other hand, Jay, I don't know anyone who does more careful testing than you do and truly figures out what works to win at whatever you make up your mind to compete in.

"One test is worth a...

I've never been impressed either, Jay.

However, in the solo situation, perhaps more like drag racing, radiator heat to air transfer efficiency may not be as critical as one might think.

Total...

You've already received generally good advice on not getting a Kaw powered car- but there are some very good chassis worth doing an engine swap on that still might have a Kaw in them like older...

Wow, nice job on your CM Solo Vee.
Not enuff smart people have built these to the rule limit, so should be very neat to see you run this car.

BTW, it is a good practice to wear a helmet anytime...

Jim's idea about inside tire excessive toe out angle (from Ackermann) being an aero impediment in F1 is the most interesting thing I've read in a while. Once you have a car that operates in a totally...

Agreed that a manual disconnect is quick and dirty, but with a tiny bit of extra work, a breaker will gain you extra protection.
Also, remember that we are considering the case of formula and sports...

Hi there Don and friends. I hope ur solo car is coming along Don.

I saw this idea first on Bob Fox's DSR years ago:

Use a circuit breaker instead of a manual-only disconnect sw.

With a...

I'm always appreciative for any help or info, but it was actually MMi16 who hit the mark and gave me exactly what I was looking for:
"Track fuel brand at 'most' tracks is Sunoco. Some tracks only...

Thanks Cory, but what brand and model is that: VP110?
.. and is that 110 rating you say you use the (R+M)/2 average or is it ROM 110?

I'm interested in actual race gas brand and model number...

I'll check DCs to see if SX2 or U4.4 are ok, but wonder what people are running typically? Whatever is available at the track?
I'd really like to run Sunoco 260GT+ since it is unleaded and maybe a...

One recommendation I have received is to run 110 octane in a professionally built 493, 494, 593. I assume that's RON, but maybe I'm wrong. I wonder what fuels the veterans in this class are finding...

Interesting thread. I'm working on someone else's car and their 5 gal fuel cell bladder leaks like a sieve. Mfg.(Red Devil) says his own cost for a new one to fit that chassis is $1500 now.

I...

Ben, Well you did pretty darn good at that event!

About the only time I can't chat easily is between my runs. They don't have very big run groups, so there isn't a lot of time to fiddle w. the...

Ben, Wouldn't you rather have top open class morning runs PAX ? Timing used the KM instead of CM PAX factor for you, so I emailed Colm. You have top morning PAX. However, you must have left early...

Thanks for the invitation to get on out there again. Now that I've sold the house, I have more time to work on the car. Finishing up another muffler so I can have 3 in series. Who woulda thought only...

Ben,
No single roll couple setup is likely to be optimum both places given the big difference in surface and courses. Good shocks might help you handle the transient situations better at both,...

Wow Ben, you must have been really tuned in on that course, Driver + car.

I looked at the results, and you buried everyone including the F125 guy.

W/out any slow tight and then on the gas in...

Sounds like almost everything was covered by others.

However, I don't think I saw rear droop travel mentioned- except in the context of rebound damping speed.

While obviously your roll couple...

You guys sure are quick in CM, but like you indicate, those 2 in their Cheetah are tough acts to follow.

My Avons are close to 5 years old now, so trying to decide on new shoes for the car....

Chris, what kinda times should a BM car expect there? 50 sec typical per side, 115 mph top end?
Just trying to get a feel for how much harder compound compared to Marina as well as top end to plan...

So sorry to hear about the motor misfortune.

Was this at Crow's Landing where you might have seen some prolonged high revs?

How long are the runs there typically for you and other fast...

I feel like typing this morning.....
Ackermann geometry involves the angle of the inside tire vs. the outside to make the tires EACH follow the correct radius in a turn. The original presumption was...

Mark,
1) From what I understand, it is easy to have lift on those cars. Killing frontal lift may help you. Look at underbody rake angle at speed first.
2) Look at the exact wording in the rules...

Haven't been out for a while because of intensive period of slave labor on our house, and before that, some health issues.

Sold our house last month and now tidying up the garage at the house...

No forced induction allowed in BM, but a FF1600 (or FF2000) largely unchanged in terms of chassis could be the basis for a very competitive BM solo car. I personally have a 2-stroke in a FF2000...

Hi Mark,
You may remember me from Marina. I have the open wheel BM mod car and haven't run in a while.

You can't run as much advance at cranking speeds obviously, but then you want to have it...

I was talking to Perry Simmonds who has built one the neatest new BM cars in the country. They move solo cars for sale to the GENERAL classified section now.
That's not exactly where I would go to...

SOLD

GY has some smarts when it comes to carcass construction. They just appear very slow to address small market stuff.

The 9.5x20x13 bias ply FA front has been around for maybe 30+ years. In the...