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Replacing the standard 2.2 cam with a Holbay, or S-cam. Issues?

Started by Jon Weywadt, June 14, 2014, 12:45:46 PM

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Jon Weywadt

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Replacing the standard 2.2 cam with a Holbay, or S-cam. Issues?
June 14, 2014, 12:45:46 PM
One of the things I want to do is to install a Holbay, or S-cam in my Murena 2.2.

Before I attempt this I want to ask if it also requires to mount double carbs?
Or can the original single carb deliver the extra fuel that I assume the S-cam will cause the engine to consume?

If more fuel than one carb can deliver is needed, I will wait until I am ready to also convert to fuel injection. My MegaSquirt control should automatically adjust air/fuel mixture as the quick-response Lambda probe tells it.
Matranaut par excellence 8)

TimS

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Re: Replacing the standard 2.2 cam with a Holbay, or S-cam. Issues?
#1
June 20, 2014, 11:44:55 PM
Jon
I believe I have a Holbay cam in my car. The carb is a Weber 34DMTR which replace the original worn out Solex as I understand.

Quite happy to post a photo of the carb if you like, but it is more than enough for the engine and after  tune today, is producing 120BHP.

Anders Dinsen

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Re: Replacing the standard 2.2 cam with a Holbay, or S-cam. Issues?
#2
June 28, 2014, 08:34:58 PM
The Holbay cam runs very well with the original Solex 34CIC, Jon. No rejetting or anything is needed, and the carb can supply plenty enough air for the engine to breate up to 7000 rpm  :o

/Anders
1982 Talbot Matra Murena 2.2 prep 142 (under restoration)

Used to own:
2001 Renault Matra Grand Espace "The Race" V6 24v
1997 Renault Matra Espace 2.0 8V
1987 Renault Matra Espace J11 2.2

Jon Weywadt

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Re: Replacing the standard 2.2 cam with a Holbay, or S-cam. Issues?
#3
June 29, 2014, 10:21:32 AM
Quote from: Anders Dinsen on June 28, 2014, 08:34:58 PM
The Holbay cam runs very well with the original Solex 34CIC, Jon. No rejetting or anything is needed, and the carb can supply plenty enough air for the engine to breate up to 7000 rpm  :o

/Anders

Thanks Anders. That is what I hoped  to hear.  ;D
Matranaut par excellence 8)

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