SRC Alfa Tune Up - Finished

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SRC Alfa Tune Up - Finished

Postby HomeRacingWorld » Tue Jun 23, 2015 7:51 pm

Well...little more than a tune up I suppose. But for my personal taste on my wood track, the model simply needed it. I like SRC models but most of them will need some help in order to run the way I like.

PARTS LIST with Links.
Sloting Plus Victor II bushings
Slot.it 19MM 36T Spur Gear
SCC Tinned Copper Braid
SCC Oval Point Set Screws
SCC Silicone Coated Motor Lead Wire
CB Design 15x10 Insert Wheels
Paul Gage 21125 Tires
ScaleAuto #1603 Guide
SCC Assorted Axle Spacers

First off, let's take a look up front. I removed one of the front wheels and then mounted the assembly in my Tire Razor and trued both the wheels and then the tires.

Before installing it back into the car, I decided to make my own adjustable front axle system. I have done this before, but I learned something from the last build. The set screws against the axle make a very irritating vibration sound and almost no amount of lubricant quiets it down. So this time I decided to use some Plastruct tubing and make my own plastic "caps" for the axle to ride on.

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I could have easily just shimmed it with sheet plastic, but I like the option of fine tuning the ride height. This small amount of plastic really quiets this assembly. Just a drop of oil is all you need for a very smooth, free-spinning system.

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I held the sleeves in place with a needle nose and installed the oval point screws from the bottom.

Next I sanded the mounting hole lip flush with the chassis. This is not needed for me and it can rub the bottom of the full interior.

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You will also need to sand some material away from one side of the interior to make sure the lead wires clear. You notice the wire routing above. I set it like this so the wires act as a self centering system. But right where they attach in the center, the clearance is very close to the interior pan.

For me this is no issue. You cannot hardly see this area anyway and sanding it is easy. This isn't a shelf queen collector.

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Before mounting the guide, take a flat file and round the front edges off slightly. This is a STRONG guide and can handle it. You need to do this as the taller bulkhead of the guide will just slightly rub the rectangle air inlet assembly in the front. Just a few passes with the file is all you need. Super easy.

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Guide is mounted and you see the entire front end completed. I use hot glue to secure the wires. Not pretty, just effective.

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I used the original wheels for inserts. I turned them down in my Tire Razor.

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My method for prepping a wheel before it gets mounted in the Tire Razor.

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Showing how I sand and get the correct diameter.

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The photo above is from our rebuild of the SRC/ScaleAuto Porsche SHOWN HERE
You need to do the same on this model in order for the lips of the bushings to clear. I prefer doing it like this rather than sanding the bushings themselves. It's just easier to do the motor and I don't have to make sure the bushings are installed perfectly.

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When you snap in the bushings, make sure the wider flange of the bushing is to the outside. This will allow enough clearance after you sand the motor ends. It also helps set the right rear wheel just about perfect without the tire rubbing the chassis. I ALWAYS use at least one shim on each side, in this case I used .005 shim SCC makes.

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A shot of the finished motor pod assembly.

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I used some sheet lead to start the tuning process. It was just right.

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Chassis is completed and ready for the body.

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Final road test and comments.

In the end this was well worth the investment to me. I wanted a different car for our classic series and this model fits the bill nicely.

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Some might look at the cost and walk away. But the fun was transforming this car from essentially a shelf queen to a very competitive slot car. The satisfaction I get from projects like this is well worth the extra investment.

Hope you get a little something out of this and it would be fun to see some of you join in.
-Harry

"They didn't say you couldn't" - Smokey

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Re: SRC Alfa Tune Up - Finished

Postby waaytoomuchintothis » Tue Jun 23, 2015 8:36 pm

Dang, Sir Harold, Henry, Harrison, etc. (I have no idea what Harry is short for after all these years!). That was a lot of work. Not the final work, but all the thinking and experimenting that produced this. I never was all that crazy for the car, but in the interest of the slot car hobby, I definitely feel like I need to do this for solidarity. Seriously, that took some fairly serious dedication, dude. You have my gratitude, as a faithful slot car guy of some 50+ years.
"Never trust a quote from the internet."
--Abraham Lincoln
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Re: SRC Alfa Tune Up - Finished

Postby chappyman66 » Tue Jun 23, 2015 8:59 pm

Very nicely done, Harry.
I especially like the homemade adjustable front end. Did you epoxy the screws into the tubing once they were threaded through the chassis? Or do you feel they are tight enough alone?

I have been watching for one of these..I like the version with the big intake. They do take a little work, but nothing that is beyond typical for a Fly Classic. That finished car sure looks smooth!
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Re: SRC Alfa Tune Up - Finished

Postby HomeRacingWorld » Tue Jun 23, 2015 9:11 pm

Thanks guys.

No epoxy needed sir. Very snug fit.

Rob, thanks. It's just Harry. No other name. :)
-Harry

"They didn't say you couldn't" - Smokey

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Re: SRC Alfa Tune Up - Finished

Postby Audi1 » Tue Jun 23, 2015 10:24 pm

Another one of my favorite marques! Great job on the tuning, Harry. Looks like a really sweet running little car now.

Really nice approach on the lower grub screw adjustment to the front axle. Is there room for a sister grub screw in the top of the axle holder?

Allan
Last edited by Audi1 on Wed Jun 24, 2015 4:14 am, edited 1 time in total.
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Re: SRC Alfa Tune Up - Finished

Postby ShotgunDave » Tue Jun 23, 2015 11:10 pm

Great work Harry. Taking a very cool looking car and making it perform as well. :text-bravo:
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Re: SRC Alfa Tune Up - Finished

Postby btaylor » Wed Jun 24, 2015 4:02 am

I am going to use this as a guide to re build both of my 914's. I think they would benefit greatly from these improvements.
Thanks Harry, you make it easy for us!

Bob
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Cherokee Point 80' Road course
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Re: SRC Alfa Tune Up - Finished

Postby Stephane B » Wed Jun 24, 2015 11:17 am

thanks thats a great review , iM doing something similar on a 914 and my next project is the src Matra :dance:
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