New headers for C-4's
Thread Starter
Racer
Joined: Jun 2006
Posts: 361
Likes: 6
The stock socket fit the ball on the header just fine. We cut the y-pipe at the pre-cat, have to shorten it anyway since the collector hangs down at least 3" below where the stock flange did, and removed the stock three bolt flange and added the two bolt flange before welding the pipe back at the pre-cat. It's a tight leak free fit. If he does decide to produce these I'm sure he'll add a kit to make the swap as easy as possible, as he does the ThirdGen headers.
I have one question that I would like your guy's input on. Do you think it would be better to add the O2 bung on the header collector instead of at the stock location? The sensor would work better at the header collector but take a little away from the stock look. What do you think?
I have one question that I would like your guy's input on. Do you think it would be better to add the O2 bung on the header collector instead of at the stock location? The sensor would work better at the header collector but take a little away from the stock look. What do you think?
Last edited by Corvette40; Nov 18, 2011 at 03:33 PM.
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
The stock socket fit the ball on the header just fine. We cut the y-pipe at the pre-cat, have to shorten it anyway since the collector hangs down at least 3" below where the stock flange did, and removed the stock three bolt flange and added the two bolt flange before welding the pipe back at the pre-cat. It's a tight leak free fit. If he does decide to produce these I'm sure he'll add a kit to make the swap as easy as possible, as he does the ThirdGen headers.
).
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Thread Starter
Racer
Joined: Jun 2006
Posts: 361
Likes: 6
I've dropped my exhaust several times in the driveway using ramps and it's hard, but not too difficult. Shipping would be expensive though.
You should see what it cost me to have all this done.
Last edited by Corvette40; Nov 18, 2011 at 03:57 PM.
Drifting
Joined: Oct 2006
Posts: 1,328
Likes: 14
From: Stafford Connecticut
If you put the 02 in the collector it would make it easier to cut the Y pipe.Then you could put the new flange on and connect the two pieces of the y pipe with a coupling available at any auto parts store .no welding needed.removing the exhaust from these cars is pretty easy with a jack an jack stands
Last edited by steven mack; Nov 18, 2011 at 04:02 PM. Reason: add info
Thread Starter
Racer
Joined: Jun 2006
Posts: 361
Likes: 6
The second set will be made tomorrow, Don will add the bung and air pipes, then they're off to get ceramic coated. I should have them back by next weekend.
The set on my car now will come off and go through the same process before going to their new owner.
Thanks.
Last edited by Corvette40; Nov 18, 2011 at 04:14 PM.
Advanced
Joined: Dec 2010
Posts: 64
Likes: 0
From: Orange So Cal
Thread Starter
Racer
Joined: Jun 2006
Posts: 361
Likes: 6
Sorry for the late reply. I had ignition problems on the Dyno and couldn't get the analyzer to pick up a complete run. My rpm's looked like a heart beat monitor display, only faster. What is strange is that my gauge doesnt flutter, but both the analyzer and laptop did. I will be going back after Thanksgiving.
I pulled the cap and coil yesterday and there was evidence of arcing in the cap. I then found the coil ground wire barely hanging together and it also looked like it was arcing. My spark plug wires were ohming at 9,000 ohms and up. I replaced the coil and wires and checked all the engine grounds. She seems to accelerate smoother, but that just might be my imagination.
I pulled the cap and coil yesterday and there was evidence of arcing in the cap. I then found the coil ground wire barely hanging together and it also looked like it was arcing. My spark plug wires were ohming at 9,000 ohms and up. I replaced the coil and wires and checked all the engine grounds. She seems to accelerate smoother, but that just might be my imagination.
Last edited by Corvette40; Nov 22, 2011 at 08:12 PM.
Thread Starter
Racer
Joined: Jun 2006
Posts: 361
Likes: 6
They should clear the plugs fine. As soon as we get the second set back, should be tomorrow, we'll mock them up on a straight plug motor we have on a stand in the shop and snap a pic.
Advanced
Joined: Dec 2010
Posts: 64
Likes: 0
From: Orange So Cal
Steve:
I have posted a couple of pictures on a straight plug motor on the TPI site.
I don't have the second set ready yet, but the first rough draft (header) will give you an idea of the area of your concern for straight plug heads.
I have posted a couple of pictures on a straight plug motor on the TPI site.
I don't have the second set ready yet, but the first rough draft (header) will give you an idea of the area of your concern for straight plug heads.
Instructor
Joined: Apr 2011
Posts: 218
Likes: 16
From: Littleton CO
May I suggest a 3 bolt flange alternative? I think most of the years are 3 bolts and it probably is a better sealing design. It would be a shame to buy a brand new Y-pipe with no cats and have to hack it up to put a different flange on it and create another possible leak point.