Posts by mikeyapproved

Quote from Shatneyman

seems like you would be ahead of the game buying a car. Why reinvent the wheel?

@Shatneyman, you are absolutely correct, way ahead buying something, but that isn't fun

The Airbus pilot was skilled, far better skill than the stupid electronic brain... He knew that he could get the aircraft to pop over the trees with no issue, but the computer did not think, did not understand, did not see, it just said NO and the aircraft flew right into them, not because the pilot erred, because the artificial intelligence isn't intelligent at all...

Hey @Mike in Victoria BC

Mike here from up in PG...

The electronic control technology will undoubtedly make progress, but it can not see and think like a person...

Here is a great example:

Cops often say vehicle crashes can be traced back to:

Diving too fast for conditions...
Speeding... Speed kills, remember
Reckless driving...

Yet those are all caused by the person not having:

The skill, for the conditions
The skill for the speed.
The skill for the maneuver.

People drive too fast for their ability!

Being that I drive in snow and ice half the year, then play on back roads the rest, I can tell you that any kind of stability control, ABS, traction control is actually downright dangerous for a skilled driver.

Traction control limits your control of the power to the drive wheels when it is told by sensors that you don't need it, yet there have been times when I really needed the power, yet the system said no. I disable traction control every time I get into my car...

I many times want 1 wheel to brake because it is the only one with traction, yet these so called intelligent systems can not see what I see and so they try and control the whole package, in the meantime the vehicle has hit whatever because these systems do not see and think like a person.

Same goes for accident avoidance, there are times when I have made a split second decision to avoid an animal in the dark that required a rapid series of way out of range inputs to the steering, throttle and brakes that an onboard control system would not have allowed me to make, because they are in themselves unsafe... Yet I made them...

The video of the Slingshot rollover illustrates the difference between having skill and driving versus not having skill and over driving your ability...

I watched in slow motion, zoomed in and this driver was way too slow in correcting after the first flick... combine this with the slow ration steering rack and yikes. Yet they should have known all that before they ever tried this move...

I was not born with the experience and skills that I have, I learned them, I earned them, sometimes the hard way...

Oh, my dream, ummm I mean project... along these lines in form, but Hemi, 8 speed auto, bigger and wider rear tires...

Careful with Carbon brakes... they tend to react way different cold that when running in the optimal temperature range, the range most people will never get them to...

Great in a race car, if you can afford it, not necessarily a great thing in a road driven vehicle such as a Slingshot...

When I was working for a CART Team in Indianapolis, we only used them for specific tracks...

m

@Ghost

Thanks for those A arm dimensions, will be close enough to enter into my suspension design program,

Again, really appreciate your help

Mike

@Ghost

The reference angle side to side from the Centerline of the slingshot... (Top view)

Just how much the wheels turn each way from center in a rough angle measurement...

Quote from Orangeman

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"artificial intelligence" disabled ....

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Display More

Lol, looks like intelligence disabled ...

Another reason my project has 2 wheels on the rear... but ultimately it still comes back to the driver.

If I'm not sideways, I'm not happy

I've been upside down twice over the last 40 years. Once was caused by inattention on my part, once was not pre-running the course to check for unexpected dangers... read sink hole the size of cabin, just over a rise in the road.

I absolutely hate ABS, Traction control and Stability control... maybe because I was taught/learned the physics of vehicle control, then practiced it religiously, on an ongoing basis. (Did some practice on black ice today in fact, taking the wife to work )

I recently worked with an engineering group from a large company who had designed a host of systems to help the driver...

This included ride pitch control, traction control, stability control, both in lean and yaw, abs etc.

These systems only help those who are either not taught the physics, or those who are not able to apply what they learn and put it into practice...

Useless if you are skilled, as they only hinder your own abilities.

There are many factors that cause crashes, but our system, at least here in Canada, does virtually nothing to teach a driver the physics of vehicle control, let alone having them prove they can put it into practice.

A drivers license should have the same requirements for skill proven before it is given as a pilots license does before it is given... The person learns, practices then proves they have the skills, only then are they issued a license.

Mike.

Ahhhh all the electronic bs to make us safe hey

Another reason why I am doing my project, all of the stuff listed below...

ABS

Stability control

Traction control

Will not done by artificial intelligence.

It will all be done by the onboard computer, the one inside the helmet of the person driving

Quote from funinthesun

and that would be a conventional steering setup or the electric version?

One would need to discuss with Unisteer, I'm thinking they could build an exact replica of the Slingshot rack, so that it would bolt in place and still retain all the Slingshot hardware etc??

I may be wrong... again, for my project, I do not need to use Slingshot specific electric power steering... although I will use electric power steering of some sort.

When I look at the parts breakdown for the Slingshot, I see a coupler between the rack and the power steering unit, even if Unisteer can not make the same spline on the rack, a custom coupler from another company who designs and builds steering components may work...

Borgeson Steering
Woodward steering
etc.

Now, what would conventional steering be like on a Slingshot???? I have not driven one, so I have not driven one with the electric system disabled to test...

Hey @Ghost

Is your Slingshot still on the hoist???

I need front A arm chassis mounting measurements...

Lower A arm front inner bushing vertical dimension to Upper A arm inner front bushing. Center to center, or bottom to bottom etc.

Also:

Lower A arm rear inner bushing vertical dimension to Upper A arm rear inner bushing, again center to center, or bottom to bottom etc.

I also need a rough angle of the front wheel / tire when turned to lock in both directions, either side will work.

Just close will do, don't need pics

Ok, so been researching different ratio steering, specific to my project, yet it could be apply to a Slingshot as well...

So, stock Slingshot steering is roughly 3 complete turns lock to lock from what is posted in other posts...

@Ghost measured the rack travel at roughly 3" lock to lock...

Unisteer:

There are 3 ratio's listed in Red below, the 3 turns that the Slingshot has, combined with the 3" of travel tells us the Slingshot has basically the same as the slowest ratio listed below.

So, if anyone wants a custom rack built, the 1.3" of rack travel per steering wheel rotation or the 1.5" of rack travel per rotation of the steering will give them a faster ratio...

I need to do some additional research for my project, but thought this info may be of interest to Slingshot owners.

Mike.

Thanks Ghost, that is good enough for me to do some checking on a custom ratio rack.

Appreciate it

Mike

Can anyone measure the rack travel on one end lock to lock for me??

Even tie rod end travel from lock to lock will be close enough

Thanks, Mike

I like this idea, but a HEMI, 8 speed, Brembo handlebar master cyl's, AKA mountain bike style front and rear on separate systems and Slingshot knuckles and poss front suspension/steering parts... Not the stock A Arms though, but may do A arm copies with the heavier ball joints. ( would save a ton of suspension geometry calculations and off the shelf for at least some bits

If I use stock Slingshot suspension dimensions, I can probably use a Unisteer custom ratio steering rack, as the Slingshot is too slow for a handlebar setup...

Rear suspension will prob be an aluminum dana 44 diff (Jeep), narrowed with a single swing arm...

Would like to use 345/35/15 on the rear and 335/30/20 on the front...

Many hurdles to overcome, but I have completed a few crazy projects over the years, so we will see how it goes.

PS:, Can anyone measure how much total travel you get at the steering rack output with the complete lock to lock steering wheel rotations?

Quote from mniron

@funinthesun I think that was the rear bearing that was the issue that @kenny_h had. These are the front hubs that @mikeyapproved is referencing, but the same holds true about the sensors. Do these hubs have sensors? Are they a direct replacement?

Yes these are front wheel bearings.... the Slingshot ones I have do not have any ABS rings on them...

I have a stock slingshot bearing and a new Murano bearing on the bench and I can not find any critical dimension differences.

Yup, good points... I'm not using abs for my project, so I did not look into that.

FYI

Front upper ball joints:

Pontiac Solstice
Corvette 97-2011
Cadillac XLR 04-09

Have the same taper and dimensions as far as the taper goes to fit the Slingshot knuckle.

They DO NOT fit the A Arms, but if anyone is considering custom A Arms to solve the ongoing slingshot ball joint issue, the above ball joints would be suitable candidates, body and pivot ball dimensions are alot stouter than the puny slingshot...

Howe Racing: Howe 22306 - HYBRID K5208 / K772 may be a great candidate for custom arms....

I'm looking into custom arms using slingshot knuckles, but unlikely that I will use the same slingshot chassis mounting etc... undecided on that yet.

FYI for everyone.

REAR Wheel bearing/hubs from a Nissan Murano 2008-2014 Also some Maxima, Quest and Infinity Q60's have the same dimensions as the Slingshot, awd has splined hubs for those who may wish to convert
fwd hubs are non splined.

All critical dimensions match the slingshot as far as I have determined.

Again FYI many Nissan / Infinity vehicles have the same brake rotor bore dimension as the slingshot, for those thinking of doing a custom brake swap...

Plus these bearings start at about 1/3 the price of slingshot bearings... on Rockauto.

Timken numbers are just a little less than oem for price.

AWD HA590238
FWD HA590237

The slingshot hubs actually have 2 dimensions.... one for the rotor and one for the wheel, stepped.

Custom rings are required...

Quote from mniron

Close but unless the hub is correct they are worthless

Well, not if a person uses a hub centric adapter.....

Im playing with a 360mm rotor from a BMW... will use a hub centric adapter ring (Stainless)for the center and redrilled hat...

I will let everyone know if i'm successful or not...