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View Full Version : Sandblast (Silica) Aluminum Intake?



NOTNSS
12-17-2004, 01:18 PM
What do you suppose a sandblasted B4B would look like? It's painted red now and is the old version B4B so probably not all that pretty before it was painted. I'd be using 20-grit Silica sand and try to keep the pressure as low as possible. Wondering if anyone has done this and what the results were? Will a clear high-temp paint hold up on the finished product? Thinking of trying the same thing on my crinkle black TA valve covers. Sounds kinda half- :moonu: I know.

mltdwn12
12-17-2004, 01:30 PM
I did it on a B4B before. It makes the intake look gray. I wasn't thrilled with it. I then put clear on it, made it worse. I think the only thing I've ever seen that makes it look sort of new is glass beading. Anyone else???

pglade
12-17-2004, 01:46 PM
Using coarser media will impart a grayish (vs. bright aluminum) tone to the aluminum as noted above. Clearing it makes the gray come out even more...so just confirming the above. Glass beading will give it the bright, silvery aluminum look that new intakes have---but you won't have the protection of any clear or paint. Each way has its own tradeoffs. Patton

Dan Healey
12-17-2004, 01:54 PM
Jim Weise can get a polish job to them, and they really look great. He did mine, dust & dirt wipes right off, no clear coat to turn yellow... :TU:

71GSX455-4SPD
12-17-2004, 02:10 PM
Alumablast from Eastwood? Made the cast section on my Muncie look great!

Rogers Performance
12-17-2004, 03:41 PM
In my shop i have a shot blaster that i put stainless steel shot in and the manifold looks all most new.Try and find some one in your area that has one with stainless in it.

jfmjr442
12-17-2004, 04:21 PM
This was just blasted and cleared, judge for yourself - I had to crop the image for size

jfmjr442
12-17-2004, 04:27 PM
And in hear you can see a little of the prior paint we missed when blasting

nailheadina67
12-17-2004, 05:31 PM
I glass bead blasted my valve covers, and then used silver engine paint on them.......came out great......the last time I used clear it looked gray and later turned a little brownish. :ball:

:bglasses:

jpoole
12-17-2004, 06:08 PM
I blasted the paint off of my factory aluminum intake that came on my 83 hurst olds. It looked like crap all gray. I then took a wire wheel on a drill and went over the thing and it looked great afterwards. It kinda put a polish on it. May give the wire wheel a try if you have already blasted it.

EODLEGS
12-17-2004, 06:37 PM
sorry to get off topic of your original question but...I second Jim W's polishing. Here's a pic of my old nailhead timing cover that he ceramic media tumbled for me a few years back....just as a reference to what the aluminum can turn out like.

Speedfreaks101
12-17-2004, 08:05 PM
Like pglade stated the size of the media will affect the color but so will the condition. If you use new glass beads they will impart a shinny finish as if the part were new. If the glass beads have been in the blaster for a while they will turn the aluminum a darker grey color. When you use the older media the metal will also show fingerprints when you touch it. The reason for the color difference is the media actually gets dirty.


If you do not have a blasing cabinet then I would suggest you looking into getting one for yourself. They are cheap and media is about 20.00 a bag. It is very convient when you are woring on something to get a nice surface to work with.

I am kind of anal and do not like to add paint because it darkens the finish of the aluminum.

As far as the pressure I would not be very concearned. I have blasted my intakes before at 100 psi with no ill effects. I did not spend time on the mating surfaces but they were not what I was trying to clean up.


Don't know if any of this is usefull to you but just trying to help.


Bart

wkillgs
12-18-2004, 11:50 AM
Sand is very aggressive.....I'd use glass beads.
Another method is to have the intake Jet-Hot coated.....Awesome results, but at a price!

NOTNSS
12-18-2004, 11:55 AM
Where do you get the "media" - glass beads? I've only been able to find silica sand.

On the rocker covers: what we need (I would like) is chrome, stamped-steel like the Stage 1 covers, only tall enough to clear the TA roller rockers. I still like them as well as any I've seen. And EASY to keep clean.

Thanks.

lcac_man
12-18-2004, 12:01 PM
Blast and powdercoat it in an aluminum finish. Powdercoat will stand up to gas spills and other staining, it also won't have to be maintained like polishing will.
Not much of a close up but it looks as good today as it did two years ago when I did it.

Special57
12-18-2004, 02:07 PM
How about the new Permastar finish that Edelbrock is now using. See; http://www.edelbrock.com/automotive/index.html , go to intakes, then Permastar finish to see examples. They started with just intakes but it looks like they are expanding to w/pumps, valve covers etc. I checked into it last year but there were no shops doing it on a small one item level. They were only interested in volume commercial accounts such as manufacturers of wheels etc. Maybe somebody knows a shop that will do individual items for us. I kept hearing the process was still in it's infancy and not yet available to the small guy but is the technology of the future.

jpoole
12-18-2004, 05:56 PM
Hey Gary, you can use a small spacer gasket that TA sells that will allow the use of stock valve covers with roller rockers. Also, check ebay, they have new chrome 455 valver covers there.

GStage1
12-18-2004, 10:50 PM
Gary,
For all your blasting needs, www.tptools.com

I have their cabinet and dust collection system. Love it!

gotbuick
12-18-2004, 11:39 PM
Blast and powdercoat it in an aluminum finish. Powdercoat will stand up to gas spills and other staining, it also won't have to be maintained like polishing will.
Not much of a close up but it looks as good today as it did two years ago when I did it.


Very clean under the hood!!! Like it!

NOTNSS
12-19-2004, 12:20 AM
Hey Gary, you can use a small spacer gasket that TA sells that will allow the use of stock valve covers with roller rockers. Also, check ebay, they have new chrome 455 valver covers there.

Hmmm... didn't know about the spacers. I have a set of chrome Stage 1 covers. Just blasted and painted one of the black TA covers today. Did it in engine red with polished aluminum highlights. I like it lots better than the wrinkle black. I'll post a pic when done detailing the engine. #2 will be done tomorrow.

Thanks

nailheadina67
12-19-2004, 09:39 AM
Gary,
For all your blasting needs, www.tptools.com

I have their cabinet and dust collection system. Love it!

Gary, thanks for that link! I needed a new source for blasting equipment. :TU:

I built my own cabinet........took me 2 months: :Brow:

glaw@jjsnack
12-21-2004, 11:41 AM
Gary I'm gogin to third Eric and Dan. Jim W did my intake and timing chain cover and they came out great. The process he uses seems to close the pours in the metal and polish it too. The intake had a really smooth feel to it when it was done. I have had a couple intakes glass beaded and haev never been as happy with the job how how lng the look held up. It's really easy to clean and didn't seem to change clors or anything wierd. I'd reccomend it.