MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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skootch13
aaron kuertz
cincinnati
(20 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Edelbrock 1404 throttle linkage interferes with MG valve cover
Posted by: skootch13
Date: September 09, 2020 01:01PM

Offenhausere intake on a Rover V8.

Edelbrok 1404 carb.

Secondary throttle linkage is being prevented from opening all the way because of the valve cover.

Has anyone put a spacer on top of the intake manifold? I have a K and N air cleaner so I have an uncut stock hood. Clearance issues?
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88v8
Ivor Duarte
Gloucestershire UK
(802 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
1974 Land Rover Lightweight V8

Re: Edelbrock 1404 throttle linkage interferes with MG valve cover
Posted by: 88v8
Date: September 10, 2020 04:30AM

A phenolic spacer would be quite routine to prevent heat & fuel evaporation problems.
[www.summitracing.com]
Maybe yours doesn't have one precisely to avoid hood clearance issues.

There is an Offy manifold, the JWR/Offenhauser which is low rise. High torque. [www.woolfe.com] That's the one I'm using.

Air cleaners come in various thicknesses. I bought a 3" for my Rover V8, it was too tall, so I went to a thinner one. How thick is yours?

Ivor


skootch13
aaron kuertz
cincinnati
(20 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: Edelbrock 1404 throttle linkage interferes with MG valve cover
Posted by: skootch13
Date: September 10, 2020 07:44AM

A closer look shows that the linkage juuuust clears the valve cover. And that the problem for the secondaries not opening was a stretched or slipped throttle cable. Re adjusted and all is right with the world.


Moderator
Curtis Jacobson
Portland Oregon
(4478 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Edelbrock 1404 throttle linkage interferes with MG valve cover
Posted by: Moderator
Date: September 10, 2020 11:45PM

If you have a cable, it's a good idea to protect it with an adjustable pedal stop. The design can be extremely simple. Typically, a strategically placed bolt and two nuts will do the trick.

IMHO, a proper throttle linkage is a very worthwhile upgrade.


88v8
Ivor Duarte
Gloucestershire UK
(802 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
1974 Land Rover Lightweight V8

Re: Edelbrock 1404 throttle linkage interferes with MG valve cover
Posted by: 88v8
Date: September 11, 2020 04:24AM

Quote:
If you have a cable, it's a good idea to protect it with an adjustable pedal stop.

Too right. Otherwise the cable will eventually break.
Mind you, if the pedal stop is attached to the pedal rather than the floor, that can have issues too. I recall a significant improvement in performance from removing multiple layers of carpet from under the stop.

Ivor


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