Jordan's '72 2 door KA project

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gooned
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Re: Jordan's '72 2 door KA project

Post by gooned » 08 Sep 2018 20:47

Kimberly should be a nice upgrade from the last stop!

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Byron510
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Re: Jordan's '72 2 door KA project

Post by Byron510 » 09 Sep 2018 06:39

Great write up Jordan. Playing with unbalance is a really interesting learning curve.
I see you have (had?) access to a Schenck machine with a Cab 720 head unit, this is the Cadillac off balance machines, a really quality machine, and what is in all of our newer ABB turbo shops. The machine I had here in Vancouver was a Cab 690, which didn’t have a many neat bits of software, which forced you as a user to “know more”.

Of course I was balancing turbines, so tolerances of less than 1g/mm were common. At that level, the effect of induced heat from you hands while holding the rotor before placing it on the machine can easily seen. Also friction from the roller bearings and the drive belt are a running concern.

We always used two balancing planes, it just simply far more accurate as you noted.Two things I learned over my years of balancing rotors is the we used couple imbalance at any time that the balancing planes come close together. Like many of our axial turbines, the 2 balancing planes were very close together. Just like your flywheel, couple imballance mathematically calculates where the individual Ballance planes will rotate to, and it is a setting on the 720. My 690 didn’t have this, so you had to lean to visualize it, or do the math on paper - which there often wasn’t time for. The cool thing about couple imballance is that you will remove less material from the rotor while archiving the same balance tolerance, and this is the primary reason why we would employ this method. Our turbine shafts are worth a ridiculous amount of money.

Anyways, great read - thanks for your thoughts. One book we kept around for guys wanting to read was a copy of the Fundamentals of Ballancing, it looked like it was printed in the 40’s, but it could have been much newer. Like the materials you had access to, those fundamentals don’t change, the technology and software does however.

And good luck on your new job, what will you be doing in the Kootenies? And now we have another destination in the BC interior to shoot for, that’s cool.

Byron
Love people and use things,
because the opposite never works.

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JordanTr
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Re: Jordan's '72 2 door KA project

Post by JordanTr » 21 Oct 2018 20:40

Hey Byron,

I definitely lost track of this post amid all the moving etc.

Yes, I had access to a Shenck balancing machine with a technician (union problems! lol). I sure do miss it, there isn't one at the new mill.

I would LOVE to have a balancing machine for home use. Imagine how smooth a car would drive with wheels balanced to G1!

Thanks. The new job is similar to before; it's a Reliability Engineer at a Kraft pulp mill. Hopefully I'll be on my feet with somewhere to do car stuff next year. It's all I can do right now to keep bikes and skis indoors in our small rental in Kimberley.

With Golddust sold, I'm hoping I can throw some wrench time back into the 510 and re-do the exhaust and intake and generally clean up a lot of the high school level work.
Jordan | '72 2 door KA project | '94 240sx RB26DETT | '97 Silvia RB25DET | '90 Audi 90 Quattro 20V (DD)

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icehouse
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Re: Jordan's '72 2 door KA project

Post by icehouse » 22 Oct 2018 08:24

BOOOOOOOSSSSTTTTTTT!!!!!! WWWWWWSSSSSHHHHHH!!!!! Lately I've driven two different turbo KA 510's, and a SR turbo car. Damn they make my car feel so so so so so slow. Although my car drives way nicer :) The SR was 300 to the wheels and the KA was 350. fun times!
"People don't like it when shit doesn't match their rule of thumb." Sam

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JordanTr
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Re: Jordan's '72 2 door KA project

Post by JordanTr » 22 Oct 2018 08:35

Hahaha I know. There’s only so much time in the day!
Jordan | '72 2 door KA project | '94 240sx RB26DETT | '97 Silvia RB25DET | '90 Audi 90 Quattro 20V (DD)

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JordanTr
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Re: Jordan's '72 2 door KA project

Post by JordanTr » 04 Nov 2018 10:11

Still waiting for some shop time but I'll leave it right here for now. :wink:

Any guesses what's in the box?

Image
Jordan | '72 2 door KA project | '94 240sx RB26DETT | '97 Silvia RB25DET | '90 Audi 90 Quattro 20V (DD)

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bertvorgon
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Re: Jordan's '72 2 door KA project

Post by bertvorgon » 04 Nov 2018 11:09

Turbo grind camshaft(s) ?
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1968 Vintage 3HP Mini Bike
1971 Vintage 13' BOLER trailer

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JordanTr
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Re: Jordan's '72 2 door KA project

Post by JordanTr » 04 Nov 2018 18:30

bertvorgon wrote:
04 Nov 2018 11:09
Turbo grind camshaft(s) ?
Not yet Keith but hopefully I'll be on that road in the near future! I'm making plans for boost. What duration are you running on your car?

There are lots of stock options on the twin cam KAs.

S13 ('91-'94) used a 240/248 intake/exhaust cam setup
S14 ('95-'98) used a 232/232 setup for more lower end torque. Rev limiter on S14s dropped accordingly down to 6500 from 6900 on the S13 KA.

With the S14 KA long block in the car, I will almost certainly be looking to a cam swap in the future. I have 2x 240s, 2x248s and 2x232s in the car so I can conjure up something for sure! It all depends on how the turbo setup breathes. I would like a nice flat torque curve.

256, 264, and 272 cams are also available for the KA but cams are quite low on the priority list at the point.

To answer the question... In the box is a RHD Ford Escort manual steering rack for the Jeff/JBC rack conversion. 2.9 turns lock to lock in the box which results in ~2.4 turns lock to lock when used with the JBC steering arms!
Jordan | '72 2 door KA project | '94 240sx RB26DETT | '97 Silvia RB25DET | '90 Audi 90 Quattro 20V (DD)

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