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Side pipe adjustment
One of my side pipes is not properly centered in the cutout. It used to rub a bit on start-up, but has gotten worse and needs to be corrected.%/
What's the easiest way to correct this? Decrease the bend in the collectors? What's the easiest way to measure how much? http://www.clubcobra.com/forums/pict...ictureid=16699 http://www.clubcobra.com/forums/pict...ictureid=16700 |
I think your choices are:
1/ Cut the hole slightly bigger. 2/ heat the side pipes and bend them slightly. 3/ Space the engine mounts. 4/ Shorten the header pipes slightly where the side pipes fit. Which one you choose depends on you exact situation. |
If the problem is getting worse, something is changing. Could be the rubber in the engine mount is deteriorating and needs to be replaced ?
Ted |
Check your motor mounts; replace with urethane-based. If that doesn't reset the gaps properly then use 1/16" or 1/8" spacers. Either of these fixes may impact your hood clearance some so be prepared to monitor that as well.
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There has never been a lot of clearance on that side (passenger), but there was always a gap. The other side is fine, so raising the engine would solve a problem and create another. The motor is coming out (see my thread on the metal I found in the oil pan) so I can inspect the mounts and possibly replace them with urethane mounts. I have OE style rubber mounts now.
My guess is that bending the pipes will work best, but will be more finicky to get right as I'll have to have someone bend them. Any suggestion as to the best way to measure the amount of bend I need so I can get a shop to bend it right the first time? |
You need to shim the mount on the low side, leave the other side alone (although it will change slightly with the other side shimmed) and do use a good urethane mount. The urethane will allow less "rocking" and reduce the engine movement.
Bending the inputs to the side pipe will be difficult as they are welded to the collector and are a "unit". It would be easier to bend the header pipes "up" a like amount and allow that to reposition the side pipe in the opening. |
I'm not completely sure this will apply but have you checked to see if your engine is sitting level in the chassis from side to side.? My ERA may not be comparable but the engine could be rocked quite a few degrees from one side to the other on the pedestal mounts. I used a level across the intake and the engine hoist to lift it slightly on the low side to rock it into level position before I tightened the mounts to the frame. If you have quite a bit of clearance on the other side at the bottom this might be something to try.
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motor mounts
I purchased a set of urethane motor mounts from Olthoff Racing in Mt. Ulla, NC. for my Superformance. They were easy to install and fit like a glove. Not the cheapest, but definitely well made. I have over 10,000 miles on them and they look, and act, like brand new.
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Never been a fan of the slip fit header to side pipe.... Could yours be loose or sagging??
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The Street Beasts version of slip fit headers/side pipes uses brackets to hold the side pipes tightly to the headers. The brackets are joined together with a small bolt. If the bolt backs out, then the side pipes can begin to fall away from the headers. They won't separate completely, though, because the side pipe supports won't allow them to move that far downward. However, they'll sag to the point where it's noticeable from the side of the car. Have you checked to verify that the side pipes are not starting to separate from the header pipes?
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Hey Doug,
I just noticed this on my car, what method worked for you and how did you repair the body damage caused by the side pipe? Thanks! Steve O ERA761 |
I am curious on this thread... I just bought CSX 6079 (i get the car in september) I am not happy with the primary pipes as they have several welds instead of being one piece design with a pipe bender. My ERA primary pipes and side pipes are excellent quality. I am considering using ERA primary and side pipes on my CSX because of this issue. I am confident they will fit because the foot boxes are bigger in the ERA than the CSX. I may need to shim the steering rack or make slight mods to the drivers side heat shield over the brake/clutch master cylinder. But overall I think the bodys of the ERA and the CSX are almost identical.. any one here tried this yet?
And by looking at your condition, somthing has changed. Is it possible the motor mont bolts to chassis are loose and the motor has shifted? Also ERA puts a bolt and a nyloc through the motor mount to prevent flex... look at this Left engine mount modifications |
I had original rubber motor mounts and one of them was starting to collapse. I replaced both with solid motor mounts from cobrakiwi (very high quality pieces). My passenger side motor mount was previously shimmed about 1/8" and it made sense to leave it that way. After putting the headers and side pipes back on, but before tightening them up, I loosened up the motor mounts and used a transmission jack and 2x4 to tweak how the motor sat on the chassis to center the pipes in the cut out. It's perfect now.
I haven't repaired the fiberglass at the bottom of the cutout. It's not very noticeable. I'll probably do it someday. |
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