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DP944's Avatar
 
Join Date: Feb 2005
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Porsche Crest What do you think?

Just finished my second set of porsche wheels. Let me know what you think. They are going on a mkIII gti vr6.





Oh and i polished up an 8v intake manifold for the hell of it.
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Old 01-02-2006, 04:57 AM
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Look very good - the manifold looks well good!
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1989 guardsred 944s2 cabriolet,
1983 metallic claret 924 lux (sold)
Old 01-02-2006, 05:14 AM
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Hey thanks a lot man....i actually pulled an all nighter with my friend last night to get the wheels and manifold polished. The manifold is off a project 2-liter that i decided id adopt. 90,000 miles on the engine and when it came out of the car it ran mint. I am just going to clean it up, paint a few things, and hopefully learn as much as possible about motor rebuilds....

Actually i was hoping someone could tell me whether its a good or bad idea to sandblast the interior of the manifold for increased airflow. I have access to a sandblaster for free and if it helps the engine run better then why not right?
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Old 01-02-2006, 05:24 AM
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im not sure i would sand blast it, on aluminum that can cause pitting. but there are other types of media blasting, that can be done from certain shops that would be safe
Old 01-02-2006, 06:58 AM
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is it better to leave the interior of the manifold rough?
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Old 01-02-2006, 07:15 AM
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you can spray some brake cleaner in there to get rid of some of the buildup, you have it off, you mine as well clean it. but leaving the actual surface untouched is better than taking a sandblaster to it imo.
Old 01-02-2006, 11:29 AM
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nice polish job. I just started polishing my 16" fuchs. I have a new found appreciation for people who take on polishing jobs.

Speedy
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Old 01-02-2006, 12:33 PM
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If you're going to blast, I suggest a glass bead media.

They clean, deburr, peen, and finish a surface without changing its tolerance. This media is inert, contains no free silica, leaves no residue, and can be recycled many times. Coarse beads (40-60 and 60-120 mesh sizes) remove heavy material and produce a glossy finish. Fine beads (100-170 and 170-325 mesh sizes) clean faster in light applications and produce a matte finish.


* Info swiped from McMaster-Car
Old 01-02-2006, 01:05 PM
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Sand-blasting is a bit rough.
I sand-blasted the wheels on my old 924lux to remove 20 years of crap so that i could shine them up.
I gave up in the end as i found it hard to polish them so they were replaced with turbo 4-stud alloys which looked much better anyway.
I would have thought that it would improve induction if the inside of the manifold was polished too.
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Old 01-02-2006, 02:59 PM
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