94 to 95 Air Filter

[Ed N.]

I have noticed that some filters for 94 to 95 C4s that are stamped AC Rochester A1097C have a darker tint (almost like a light orange) to the pleated paper and some are more on the beige side. The judging manual for 94 to 96 does not address the color shade of the pleated paper design, it only indicates that the rubber is gray. Could this be an issue in terms of point deductions. The one that I have in my 95 car is the factory installed one and it resembles a beige color. I'm attaching a picture for review and commentary.


Any thoughts on this issue? I realize one of the filters saids AC Delco on it, but that's all I had available to make a comparison.
Like I said earlier, the one in my 95 is the lighter color and contains the AC Rochester A1097C stamp.

Filter.jpgAC Delco Filter.jpgAC Delco Picture 2.jpg

[Thomas W.]

Re: 94 to 95 Air Filter

Ed - The factory original air filter in my 95 matches the lighter color (beige or off-white). I have seen the darker versions also, but not 100% sure if any have been factory originals. Only a guess, but could there have been multiple manufacturing sites that utilized different paper stock? So one site used the lighter colored stock and the other site used the darker colored stock? Or could this be a date of manufacture difference? Earlier manufacture dates used the darker stock, etc.?

[Ed N.]

Re: 94 to 95 Air Filter

Thomas, you make many excellent points, but I'm lost on the issue. My theroy is that the beige/off-white could be factory installed and the darker tint could have been a replacement, but the picture I posted of the 96 filter is a replacement and it's beige/off-white. Therefore, the latter would difuse my theory. Maybe some other C4 owners could chime-in on the issue. Do you think that points could be loss as a result of the darker tint?

Thanks for the response Thomas.

[Pat F.]

Re: 94 to 95 Air Filter

Folks, I am attaching some photos of original air filters for the 94-96 period.

They were supplied to me by the original owners.

As you can see the filter element paper is a light color.

Pat

[Pat M.]

Re: 94 to 95 Air Filter

My 96's original filter looks exactly like those in Pat's pictures.

[Pat F.]

Re: 94 to 95 Air Filter

Pat could you post a picture here or send it to me at fulassoc@comcast.net ?

Thanks
Pat

[Thomas W.]

Re: 94 to 95 Air Filter

Ed - Perhaps you could check with Tom Barr (Team Leader for 94-96's) about any point deduct for the darker colored paper element.
Pat - I know you have been gathering data for the 94-96's. Have you been able to confirm that "AC Rochester" is the factory supplied filter and "AC Delco" is the service replacement?

Does anyone have experience with the earlier C4s that might comment on what was typical for them (85-93) that used a similar shaped air filter? (The 84's would be different due to the cross-fire setup).

[Ed N.]

Re: 94 to 95 Air Filter

Thomas, to my "limited" knowledge, the AC Delco filter is for the 96.

[Pat M.]

Re: 94 to 95 Air Filter

Pat could you post a picture here or send it to me at fulassoc@comcast.net ?

Thanks
Pat

Sure Pat, here you go:

[Pat F.]

Re: 94 to 95 Air Filter

Folks, the 94-96 Judging Manual states 94 and 95 have the AC Rochester.
In the first and third photos that I sent it shows the AC Rochester and they are both off of 1995 Corvettes. Photos provided by original owners.
The second photos shows an AC Delco and that is off a later 1996 Corvette. This photos also provided by an original owner.

The Judging Manual also states that 1996 Corvettes up until January 1996 may have either AC Rochester or AC Delco. After January 1996 its AC Delco.


Tom, I am enclosing a photo of an original 1990 ZR1 air cleaner. You will note the differences.

I will readily accept any photos of original air filters to add to my data base.

All the information that I have on 94-96 air filters has been forwarded to Tom Barr.

I do not make judging decisions, only add data to a file that hopefully will answer questions in the future when presented by the proper Judging Individual.

Pat

[Ed N.]

Re: 94 to 95 Air Filter

Charlie, this filter appears to have an light orange tint to it like the one I posted on my original post. The difference is that mine saids AC Rochester.

[Pat F.]

Re: 94 to 95 Air Filter

Pat, thanks for the photos, they are exactly what I expected.

I know I have it somewhere in my stuff, but do you have a build date of somewhere between March-May 1996?

I really appreciate the response.

I am working on a date code solution for these air filters and any more information you can furnish I would appreciate it.

Pat

[Pat M.]

Re: 94 to 95 Air Filter

Pat, my build sheet shows 5/23/96, my door sticker shows 6/96, and my VIN is in the 19,600 range. Hope this helps and keep up the good work. Best Regards

[Pat F.]

Re: 94 to 95 Air Filter

Pat here is the system of date codes I am working on for the air filters. I still have not got it down but I am pretty close.

Your 6/96, VIN 19600 range has a series of letters and numbers at the end-6C05N-I have converted that to 6-1996, C-April, 05-fifth day, N-Night Shift,
Another 6/96, VIN 20400 range has the similar series of letters and numbers--6C06D-Converts to 6-1996, C-April, 06-sixth day, D-Day Shift.

Once again, I am not an individual that can comment on judging, but I am just trying to compile the information. I think that you will agree that my thoughts on the date code for these air filters looks pretty good.

My two 95 references are the same way and convert out to a month or two from the build date. You can look at them in my prior post and you can work out the date code.

However, I have one that is suppose to be an original, and it does not conform to the system I have figured out for date coding the air filter, that is why I am still working on it.

I would be happy to give you the additional information if you wanted it.

Pat

[Pat M.]

Re: 94 to 95 Air Filter

Pat, that is very interesting and your methodology seems sound to me. The vast majority of my other parts are dated late March, April or May. I wonder if the nonconforming filter you found is actually original.