Benefits of upgrading the manifold/exhaust?
20 posts
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Post by: adigra » Sat Sep 20, 2014 5:21 pm
No mods required other than the small cutout in the chassis, which my car already had for the previous manifold (which was larger bore, but standard shape). Even with heat shielding on the footwell, and the heat wrap on the manifold, everything clears fine without any contact.
The centre pipe needed a couple of inches cutting off, as it was too long, but didn't need any bending, etc.. The silencer box fits perfectly, but needed a bit of fiddling to sit properly on the mounts and not touch the body.
Overall, it was much less hassle than I anticipated.
The centre pipe needed a couple of inches cutting off, as it was too long, but didn't need any bending, etc.. The silencer box fits perfectly, but needed a bit of fiddling to sit properly on the mounts and not touch the body.
Overall, it was much less hassle than I anticipated.
1967 Elan S3 S/E FHC
-
adigra - Third Gear
- Posts: 442
- Joined: 01 May 2009
Post by: 7skypilot » Sat Sep 20, 2014 8:26 pm
If it's of interest, I fitted a Matty stainless system... lovely, shiny, efficient and not too loud.
On the Sun Rally last year it was knocked off twice; once on a road hump at City Europe, Calais and once about four minutes before departing MTC on day 2. On both occasions the main pipe was removed just rear of the collector. On the first occasion I took around an hour to refit, the second a mere forty minutes, in pouring rain.
When I returned from the event I had the system modified (I can mess around with things mechanical or electrical but have no fabrication or welding skills) to locate it as close to the chassis as possible. The collector was rebuilt and tucked away as high as possible and the main pipe now sits no more than a quarter of an inch from the chassis throughout its length. The silencer mount was also modified to put the rubber support bobbin in compression rather than tension. Every part of the system is raised as high as it can be to maximise ground clearance. I've also used Norma or Mikalor stainless clamps where joining is required to avoid compromising ground clearance.
Zircotec heat shield protects the chassis and boot (trunk). Ground clearance is now as good as it can be without resorting to an oval main tube. For good measure I also wrapped the pipes with insulation and Zircotec heat shield where they run close to the clutch slave cylinder and the clutch actuating fork rubber boot. Climbing the Stelvio last summer a mate's Sprint ran out of clutch when the fluid boiled in the slave cylinder due to excessive heat from the exhaust, and excessive heat degrades the rubber fork boot pretty rapidly. The clutch feed pipe and remote bleed pipe are stainless braided with heat insulating sleeves.
We'll see how it holds together on this year's Sun...
On the Sun Rally last year it was knocked off twice; once on a road hump at City Europe, Calais and once about four minutes before departing MTC on day 2. On both occasions the main pipe was removed just rear of the collector. On the first occasion I took around an hour to refit, the second a mere forty minutes, in pouring rain.
When I returned from the event I had the system modified (I can mess around with things mechanical or electrical but have no fabrication or welding skills) to locate it as close to the chassis as possible. The collector was rebuilt and tucked away as high as possible and the main pipe now sits no more than a quarter of an inch from the chassis throughout its length. The silencer mount was also modified to put the rubber support bobbin in compression rather than tension. Every part of the system is raised as high as it can be to maximise ground clearance. I've also used Norma or Mikalor stainless clamps where joining is required to avoid compromising ground clearance.
Zircotec heat shield protects the chassis and boot (trunk). Ground clearance is now as good as it can be without resorting to an oval main tube. For good measure I also wrapped the pipes with insulation and Zircotec heat shield where they run close to the clutch slave cylinder and the clutch actuating fork rubber boot. Climbing the Stelvio last summer a mate's Sprint ran out of clutch when the fluid boiled in the slave cylinder due to excessive heat from the exhaust, and excessive heat degrades the rubber fork boot pretty rapidly. The clutch feed pipe and remote bleed pipe are stainless braided with heat insulating sleeves.
We'll see how it holds together on this year's Sun...
- 7skypilot
- Second Gear
- Posts: 91
- Joined: 16 Nov 2010
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