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Discussion Starter #1
Keep seing this 9C1, what is that?

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Discussion Starter #2
It is a police package Caprice. Like what I have below.

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94 Gold 9C1/CAI,airfoil,
T/B bypass,March pullies MSD,LT4 K/M,Ed Wright PCM,2500 Pro Torque conv.,4.10s`,cat delete,H-pipe,2 chamber flomasters w/factory resonators,Holley 255lph intank 275/60-15 all around,D/R on back,Buick brace,Bonnie [email protected]
 
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Discussion Starter #3
9C1 = father of the SS. If it hadn't been for the 9C1, your SS wouldn't exist. A man by the name of John Moss at Chevrolet took a police package caprice and based on a custom job he had seen once, converted it into the first SS, except his has a 510 cubic inch big block under the hood a red bowtie on the grille, and he had the ROH ZR6 rims which look very similar but are 17x10 instead of the stock 17x8.5 The 9C1 has more heavy duty stuff than the SS, less luxury stuff than the SS, more chrome than the SS and is not quite as low to the ground. The 9C1 was available with a stock 4.3 liter baby engine very simlar to the SS's LT1, only smaller, and for a $550.00 option, a 9C1 could have the LT1 as well. Also, the SS came with a posi rear end, the 9C1 required an additional $100.00 to get the posi rear end. The SS also has a slightly wider rear axle, but its hard to notice, and doesn't provide a performance benefit. The 9C1 also has 4 wheel disc brakes, similar to the SS, but the 9C1 holds thicker pads. Keep paying attention to this forum, the differences between the two cars becomes obvious, and it is very easy to clone an SS from a 9C1.
 
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Discussion Starter #4
Mike, all b-bodies have the same axle.
SEO 9C1: Special Equipment Option 9C1. This is GM's Regular Production Option code # for a B-body police package, just like LT1 is the RPO for a 350 MFI V8.

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Pat Flavin
'94 Caprice LT1

[This message has been edited by Sleeper (edited December 25, 2000).]
 
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Discussion Starter #5
<BLOCKQUOTE>quote:</font><HR>Originally posted by Sleeper:
Mike, all b-bodies have the same axle.
<HR></BLOCKQUOTE>

No, the 9C1 rear is 30mm narrower than a civi or an SS, holdover from the boxy 9C1 days.

And it Jon Moss, not John.



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Kelly 'GhoSSt' Rosato
1996 Impala SS, 383 LT4 (14.65 up here, 13.24 lower)
1984 Firebird, +.060 350 (Vortech Heads, HOT Cam, and schtuff)
1993 Caprice, 5.7 TBI (stock . . . FOR NOW)

"And if you wrong us, shall we not revenge? Revenge. The villany you
teach me, I will execute, and it shall go hard but I will better the
instruction."

Shylock in Act III, Scene I of 'Merchant of Venice' by William Shakespeare
 
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Discussion Starter #6
All the axles are hold overs from the boxy days, as well as the frame. I don't mind being wrong though, as long as I can become better informed. Got a source for the 30mm shorter thing?
 
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Discussion Starter #7
sorry about the double post

[This message has been edited by Mike454SS (edited December 25, 2000).]
 
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Discussion Starter #8
thanks for the help GhoSSt, I don't have a source on the axle thingy, but I do know for a fact the SS one is wider, go yank a rear off an SS and a 9C1 and put em next to each other. Jon huh, I have a few family memebers who spell there names John, my mistake, I will from now on spell the all mighty father of the 94-96 Impala SS correctly. Jon Moss
 
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Discussion Starter #9
Thanks GhoSSt, the "Jon" vs "John" thing is a pet peeve of mine....especially from guys and girls who have their cars signed. For those folks, I say read your friggin trunklid


As for the axle narrower thing : it's in that handy-dandy book called the FSM. Few other good items in it as well
. Seriously, there are a few tables in the FSM that list basically EVERY spec whatsoever on the rear axles that came in the B-bodies of that year (96 in my case).

And back-to-back (i.e. my 96 SS with 17x9.5" ROHS parked next to a 96 9C1 with the same tires), it was pretty obvious that my car had a wider axle. That little bit of width is a lot more noticable visually than you'd think it would be.

Ed
 
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Discussion Starter #10
Thanks GhoSSt, the "Jon" vs "John" thing is a pet peeve of mine....especially from guys and girls who have their cars signed. For those folks, I say read your friggin trunklid


As for the axle narrower thing : it's in that handy-dandy book called the FSM. Few other good items in it as well
. Seriously, there are a few tables in the FSM that list basically EVERY spec whatsoever on the rear axles that came in the B-bodies of that year (96 in my case).

And back-to-back (i.e. my 96 SS with 17x9.5" ROHS parked next to a 96 9C1 with the same wheels/tires), it was pretty obvious that my car had a wider axle. That little bit of width is a lot more noticable visually than you'd think it would be.

Ed
 
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Discussion Starter #12
Well s***, never read that section of the specs. I'll have to go read it and feel stupid. I have (oops, had, sold my SS) 2 94's, I never looked at the axle width. I hate to spread bad info
sorry.
 
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Discussion Starter #14
No page number (my FSM is currently over 2000 miles away), but it's a BIG table towards the front. Lists practically every spec on ALL of the axles offered in any 96 B-body.

Ed
 
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Discussion Starter #15
I noticed a few mistakes in Mike's post.
<BLOCKQUOTE>quote:</font><HR>took a police package caprice and based on a custom job he had seen once<HR></BLOCKQUOTE>

Wrong, the 93 Caprice that the concept started life as was NOT a 9C1. It was a civi with an ugly paint scheme.

<BLOCKQUOTE>quote:</font><HR>except his has a 510 cubic inch big block under the hood<HR></BLOCKQUOTE>

This is currently true, but when it was first built, it had a 350cid LT1.

<BLOCKQUOTE>quote:</font><HR>he had the ROH ZR6 rims which look very similar but are 17x10 instead of the stock 17x8.5<HR></BLOCKQUOTE>

Yes, it originally did have ROH rims, (it doesn't anymore) I doubt that they were that wide. The current rims are 12 or 13 inches wide in the rear. I forgot about the front ones. They might be 10 wide. And, the ROH ZR6's weren't available in 10 inch wide, only 9.5. Ed has them as his street tires.

<BLOCKQUOTE>quote:</font><HR>doesn't provide a performance benefit.<HR></BLOCKQUOTE>

I really don't think this has ever directly been tested. I would think that a wider track would help a bit on the skidpad. TO test this, one would have to change the axles on a car without changing anything else. That's quite a job that I haven't heard of being done before.


Hope this helps


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Cheston P - AIM:Impalaitis
96 BBB Impala SS "ADIOSS": best [email protected]
91 white Caprice 'n0n 9c1' w/L03: best [email protected]
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"BEANCOUNTERS SUCK!"
 
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Discussion Starter #16
Ok, Mike & Ed are correct that the 9C1 axle is listed in 95&96 FSM as being 1566mm and regular B (SS&Caprice) are listed as being 1598mm. This measurement is stated as being flange to flange. I stated that all b-body axles are the same. Well, we're all correct. I have checked the part #'s on the axle. GM lists them all as having the same part #. I measured the axle for my 94 B4U LT1, the original axle is sitting in the garage because I bought another for my 4.10 setup. It measures 1598mm, from wheel flange to wheel flange, hmmmmm..? When I setup my 4.10's I had replace an axle shaft. The dealer wanted to know the axle code because there are different length axle shafts, depending on what ratio and 9C1. I haven't measured the my 9C1 yet (haven't had a chance to remove a wheel) but I am sure that the 1566mm measurement (32mm or 1.25" less)is because of shorter axle shafts. I will measure the distance from backing plate flange to bpf, but I am sure it is the same, which is why all the axles have the same part #. Now, anyone care to guess (or find out) why GM did this?
 
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Discussion Starter #19
When one says, "The axles are/are not the same", it will help if one says whether they are talking about the axle housing or rear axle assembly including the axle shafts. Are the axle housings the same or are they different also?

Assuming the same offset on the wheel, a shorter axle shaft in the same axle housing may have less of a leverage arm for the wheel tire/assembly to bend or break the axle shaft on landing from a jump or going over curbs, potholes, etc.

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Rowland Hill, '95 9C1

[This message has been edited by Rowland Hill (edited December 27, 2000).]
 
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Discussion Starter #20
I've heard that the prototype SS had a red bowtie around the trunk lock. The pics on the ROD site show that it has a standard Impala logo. Did they change it later? Any pictures of how it used to look?

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Jay - HOTSS
93 DGGM Caprice "SS"




An optimist thinks that this is the best possible world. A pessimist fears that this is true.

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