GREAT Price on Control Arms

[BYprodriver]

Originally Posted by insite

1. simple material
2. chinese factories are getting pretty good at this stuff


the ones that are getting REALLY good are the ones who market to the US & europe. lots of them are running AS9100/ISO quality programs as well. i must admit i know jack about 'URO' (mfgr) and their factories. when it shows up, i'll have one of our MatE's take a look at the alloy compared w/ OEM. i bet it's very close.

Hey Insite, speaking of questionable castings any insite on the alloy used to make M96 engine parts like case, heads,cam covers? Having a hard time finding the best solution for cleaning parts without turning dark grey.

[insite]

have you tried phosphoric acid? i recommend alumiprep 33 (available from aircraft spruce). usually, it provides a nice, bright finish.

now, i HAVE noticed with certain parts that cleaning w/ alumiprep leaves the parts grey. as best i can GUESS, porsche has applied some type of anodizing to the block to help resist corrosion. in that case, mild acid treatment will leave a surface coating of antimony, which is grey.

the antimony can be removed with nitric acid (hard to get). alternatively, and i have not tried this, you can use a mixture of phosphoric & chromic acid. keep in mind these things are a little nasty.

once you've done this, any anodization will have been removed. bare aluminum WILL corrode. you can either re-anodize OR use an alodine process, which will leave a nice looking golden finish on the part. i'm getting ready to make some more drop links this week; i'll take photos of the process if you want.

the final alternative is to steam clean the parts. this should leave a nice finish without altering the anodization / surface treatments. it won't be as pretty as bare aluminum, but it may suffice.

Originally Posted by BYprodriver

Hey Insite, speaking of questionable castings any insite on the alloy used to make M96 engine parts like case, heads,cam covers? Having a hard time finding the best solution for cleaning parts without turning dark grey.

[dirkdiggler]

any word on the quality of the wearable parts on these cheap control arms?

[insite]

Originally Posted by dirkdiggler

any word on the quality of the wearable parts on these cheap control arms?

Good god, man. You've asked the Same question like fifteen times. Install them and be done with it. Report back to us.