Posted By: rlm2268
indy heads one darker in color than the other??? - 05/06/11 01:31 AM
I noticed when I took my indy SR cnc 295 heads out of the box one head is darker, almost a gray color and the other looks like regular aluminum color. Anyone ever see this and what causes it?, kinda sucks because I'm kinda picky on appearance.
Posted By: fourgearsavoy
Re: indy heads one darker in color than the other??? - 05/06/11 02:13 AM
My EZ's have what looks like a stain in the casting and I tried 3 different things to clean it and it seems to be permanent
Gus
Posted By: toplescuda
Re: indy heads one darker in color than the other??? - 05/06/11 04:09 AM
i have worked in diecast at briggs stratton for 8 years
2 things make alum change colors (cast anyway)
1 is the alum was 2 differnt temps when poured ,die was cooler on the darker one
2 the darker head was wet with something
the hoter the die and alum is when poured the shiner/ brighter the part is when it comes out
a colder part has a greater chance to have prosity in it as the alum is trying to firm up
Posted By: Joshs68
Re: indy heads one darker in color than the other??? - 05/06/11 02:21 PM
Ill take em if you just can't stand them....
Posted By: 440Jim
Re: indy heads one darker in color than the other??? - 05/06/11 05:22 PM
Have you tried taking a wire wheel on a drill to shine 'em up?
Posted By: maximum entropy
Re: indy heads one darker in color than the other??? - 05/06/11 05:48 PM
unacceptable. they should be identical. processes and methods are refined enough (one would hope) that this would not happen. maybe it won't be an issue. maybe the bruins will win the stanley cup. maybe...
Posted By: Bob_Coomer
Re: indy heads one darker in color than the other??? - 05/06/11 07:39 PM
You can use Eagle One Etching Mag Cleaner, or just cast aluminum cleaner. It will turn them both white in color. I always used this stuff on my aluminum heads/block.. and they always look near new after.... Just use brush and scrub them soaked in this stuff.
Posted By: Stanton
Re: indy heads one darker in color than the other??? - 05/06/11 09:15 PM
Just paint the damn things with aluminum cast-blast and forget it.
I'm as picky as you are and had no two cast pieces the same color in the the entire engine compartment - until I painted them all !!!
Posted By: Lil Demon
Re: indy heads one darker in color than the other??? - 05/06/11 10:26 PM
I'm going to respectfully disagee with most in this thread. You just paid Indy good money for those heads. Tell them the issue and have them send you a new head - period.
Posted By: rickraw
Re: indy heads one darker in color than the other??? - 05/06/11 10:40 PM
i agree with lil demon. we work hard for our money. companies talk up their product, get ur cash, then u receive their product & it's not up to the standards u think they should be. i'm picky too, i'd send them back. u could try some zepalume, it's a good aluminum brightner. seeya.
Posted By: FastOne
Re: indy heads one darker in color than the other??? - 05/07/11 12:50 AM
I noticed a bit of core shift in one Indy head so thought I'd weigh the pair out of curiosity, the core shift head was lighter than the other one
Posted By: Anonymous
Re: indy heads one darker in color than the other??? - 05/07/11 12:57 AM
Quote:
one head is darker, almost a gray color
Time for a paternity test...
<Maury Povich> "You are NOT the father!</Maury Povich>
Posted By: Stanton
Re: indy heads one darker in color than the other??? - 05/07/11 01:06 AM
Indy will say its not an issue and will do nothing.
Posted By: rlm2268
Re: indy heads one darker in color than the other??? - 05/07/11 01:22 AM
I acually bought them a while back from a moparts member on here, he said he got them directly from indy. I didnt try any aluminum cleaners yet. I'm guessing it might have to be a acid type alum. cleaner to do anything. I'll figure something out.
I didn't get in touch with gritzmacher yet about doing a valve job, just deciding on what valves to order and cutting the heads for spring cups.
Posted By: B G Racing
Re: indy heads one darker in color than the other??? - 05/07/11 11:42 AM
If you bought them other than direct from Indy,someone may have beadblasted one head.When we clean and redo old heads(beadblast) they come out with a dull finish.
Posted By: rlm2268
Re: indy heads one darker in color than the other??? - 05/07/11 04:22 PM
The heads for sure have not been used and not blasted. One thing is the cnc porting looks nice and they are the cnc castings.
I'm thinking maybe ferrea 6000 series valves and isky 8005a springs for a solid flat tappet cam.
could lead to problems down the road and they are not the easiest to deal with. do it now.
