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#558237 - 06/02/19 12:33 PM 1985 +8inj
B3MOG Offline

Just Getting Started

Registered: 05/02/13
Posts: 94
Loc: north yorkshire
I have been offered a crossover stainless exhaust manifold and twin system for my +8 the question is..
will this type of exhaust which crosses sides in front of the sump cause a lot of heat transfer to the oil in the sump.
has any body got any pictures of this system fitted to a car?

David Byrne

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#558252 - 06/02/19 01:50 PM Re: 1985 +8inj [Re: B3MOG]
Rovert Offline
Just Getting Started

Registered: 22/08/13
Posts: 33
It sounds like it was one of the Librands systems. I can't find a photo but a call to Librands should help you out.

I also was concerned about heat transfer so opted for an alternative approach. As I am sure you know, some +8s can be a bit marginal on cooling, so one thing I did was to have the new manifolds Ceramic coated outside and inside.
_________________________
Brian
Jersey & Spain

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#558263 - 06/02/19 03:01 PM Re: 1985 +8inj [Re: B3MOG]
MOG 615 Offline
Has a lot to Say!

Registered: 24/09/14
Posts: 1280
Loc: London
David

I have this system fitted to my +8 , in truth it is overcomplicated , has too many joins, and yes it does heat the oil in the sump.

Having said that modern oils are designed to be run at much higher temperatures than previously so I don't feel that is an issue.

Apart from the need to maintain all those joints and keep them airtight the only real issue I have is the under bonnet heat dissipation. Almost every bit of room under each side of the engine is filled with potentially hot piping. This makes heat dissipation quite serious when we experience a summer like last year. It does however warm the car up very quickly in the winter.

If you fit it you MUST crossover the lamda sensors , or they will feeding back to the wrong bank of cylinders.

The big advantage of this system is the much longer primary pipes that are rendered possible by the crossover design. The certainly helps mid range torque, and gives a really nice sound.

However IF I had my time again I would certainly go with the current Librands system where each bank just exhausts down through the chassis on the same side. I don't think you lose much power by doing this , and it would make the system so much simpler.


Edited by MOG 615 (06/02/19 03:02 PM)
_________________________
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.

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#558291 - 06/02/19 04:57 PM Re: 1985 +8inj [Re: B3MOG]
+8Rich Offline

Member of the Inner Circle

Registered: 15/12/09
Posts: 18882
Loc: Devonshire
As has been said these systems do make the engine bay significantly hotter a friend of mine had that system but changed it to full dual system when he compared his to my Librands system.
_________________________
Richard
1999 Indigo +8






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