Today a bunch of stuff from Treats came in so I was able to make some pretty decent progress with Project 075.
Some of the parts are for the Cobra, and for Ed’s fleet, but most of this was for Project 075. Longer
125mm Polini cylinder studs, a
12x16x16 Malossi little end bearing, some M7
washers and
nuts for securing the top end, and a
gasket kit. While wrenching on the Cobra I noticed that the chain has seen better days. Treats just got in these
Doppler 420 chains, and so far most of the Doppler parts I’ve bought have been pretty decent so I figured I’d try one of their chains on the Cobra, but maybe it’s going to end up on Project 075!
Removing the old studs was quite an ordeal. Not only did I have to employ the penetrating fluid, double wrench, and the triple nut lock, I also had to bring out the heat gun. Eventually though they came out, and I was able to move forward.
It is interesting to compare the various cylinder studs. The Polinis are 125mm, the stock ones are 110.5mm, the Maxiscoots are 115.5, and the Metrakit ProRace cylinder studs are 125mm. I used permanent thread lock with the new studs, and bagged up the stock studs in case I may need to employ them in the future.
The Polini studs went in swimmingly. Then I put things together as I had previously with a bit better torque. The squish measured at 0.40mm, which is too little.
Then I employed the gasket kit, removing the thin Parmakit gasket, and replaced it with the new thicker gasket.
With the gasket change, and the o-rings in place the new squish came in at 0.63mm, which is very close to the target—something between 0.65mm and 0.80mm. With a slight gasket swap, and some sealant I’m confident that the proper squish is obtainable.
Next up is modding the spacer and gaskets so that they don’t impede the flow of the charge into the transfers. I’m also going to have to open up the cylinder’s transfers a bit to line up with the cases since the 075 has much wider transfers than the 050 for which the cylinder was designed. But now I’m getting ahead of myself!!
![Paw Prints :paw_prints:](./images/smilies/paw-prints_1f43e.png)