Rpm rc10bum

[JosephS]

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Thanks! I have a feeling that the 3 bags in the kit were the chassis, Worlds front and Worlds rear kit. It's nice to see all the parts laid out so clearly and see that it came with pins. Apparently even though this was a short run vehicle the picture show the early version front shock tower that was made by associated. The manufacture later shifted somewhere else and those towers don't have the nose tube holes cut in them.

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That is super helpful. I see the first 3 bags look factory and the last one appears to be self assembled. Do you know if the parts were loose in the main bag?

[JosephS]

So in some random notes:

All of the RPM parts to this day are made of Nylon6. (not 66 nor glass reinforced) Same as associated parts. Apparently there are a number of additives that can be mixed in with the plastic as it is injected. RPM is using an additive that allows for better abrasion and impact resistance. It would be something like this
Dow impact resistance additives It wasn't mentioned which exact ones they use. Associated also used an impact resistance modifier from dupont. (forget the exact name)

The Ultra Molded chassis utilized glass reinforced PA-6. This was so that it could be stiff enough.

The entire chassis was designed and drawn by hand without computer aids.

This additive is likely why the RPM and associated parts need different methods of whitening.

The lower mounting holes on the shock tower are for the mounting of the original .56 fronts. Oval racers would mount a .56 interior and 1.02 exterior shock.

The initial front shock towers were made by associated an included holes for the nose tubes. Later versions were made elsewhere and had no holes for the nose tubes.

RPM also manufactures plastics for medical devices.

I was almost positive the lower front tower hole was for .71 shocks.

The RPM World's front and rear kits came before the Ultramold kit. The nose brace tube holes in the tower was mandatory for the front kit. The Ultramold doesn't use the holes, so it is possible they had someone else cutting those towers.

Very possible I am wrong. I'll check back and edit if I find out.

[JosephS]

AE sourced the blue screws from fastener express. They do offer natural screws as well. Might have a look and see if those are the ones they used.

I'll have to figure out how to take a proper picture of the differences. I am beginning to think that the screws are hard coated grey.

Normal aluminum screws look like the 'Bright' finish. The screws I'm looking at are more like the 'Matte.'

It's hard to see in a picture, but it's grey and not shiny like a natural finish.

The aluminum screws that were used on the Ultramold build are the AE packaged ones. They were random dull colors. I still have several in my pit box from bitd.

Thanks for that. I have some as well, but I am trying to find out what the name of the finish is to buy generic versions or just find more.

[Frankentruck]

Yellow zinc and white zinc finishes are common in steel fasteners. Maybe they get used with aluminum fasteners too.

[jcwrks]

That is super helpful. I see the first 3 bags look factory and the last one appears to be self assembled. Do you know if the parts were loose in the main bag?

Far right bag has the parts that were loose in the main bag along with the other loose parts in the pic. I don't believe the front spindles were included in the kit, but I have them in the bag anyhow.

[juicedcoupe]

The lower mounting holes on the shock tower are for the mounting of the original .56 fronts. Oval racers would mount a .56 interior and 1.02 exterior shock.

The lower holes were for .71's. If the car was lowered a lot, a .56 might be possible.

But the tower was designed for people that already had .71 shocks on their cars.

Oval guys did all kinds of things, and there were towers made for all kinds of shock arrangements.

[jcwrks]

Thanks for that. I have some as well, but I am trying to find out what the name of the finish is to buy generic versions or just find more.

Plain aluminum. Source the original AE bags to closely match what is on there. You're going to need several sizes if you want to finish the entire build out with aluminum screws. Otherwise fastener-express has the plain ones, but you need to buy in bulk.