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Gaggia Classic OPV Mod A One-Time Operation?
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Discussions > Espresso > Espresso Mods > Gaggia Classic...  
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JakeBarnes
Senior Member


Joined: 23 Nov 2013
Posts: 7
Location: Germany
Expertise: Just starting

Espresso: Gaggia Classic
Grinder: Iberital MC2
Posted Sat Dec 7, 2013, 9:39am
Subject: Gaggia Classic OPV Mod A One-Time Operation?
 

Just wanted to check if modding my Gaggia Classic OPV to 9 bars is a one-time adjustment or would I need to continue monitoring the pressure over time and perhaps making further adjustments in later months and years?

Thanks for any help.

Jake
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SJM
Senior Member


Joined: 17 Nov 2004
Posts: 1,707
Location: CA
Expertise: I love coffee

Espresso: SAMA, Gaggia Classic
Grinder: K-10PB, Rancilio MD-50
Vac Pot: no like
Drip: no like
Roaster: HotTop
Posted Sat Dec 7, 2013, 9:43am
Subject: Re: Gaggia Classic OPV Mod A One-Time Operation?
 

Good question, Jake.
I've kept my portafilter gauge around for years just in case, but have never seen the pressure change since I set it.

If you can source one to do the adjusting, you won't really need it again....certainly not on a regular basis for the OPV.
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JakeBarnes
Senior Member


Joined: 23 Nov 2013
Posts: 7
Location: Germany
Expertise: Just starting

Espresso: Gaggia Classic
Grinder: Iberital MC2
Posted Tue Dec 10, 2013, 7:19am
Subject: Re: Gaggia Classic OPV Mod A One-Time Operation?
 

Thanks for the reply, SJM.

Sounds like I don't need to keep one around.

Jake
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SJM
Senior Member


Joined: 17 Nov 2004
Posts: 1,707
Location: CA
Expertise: I love coffee

Espresso: SAMA, Gaggia Classic
Grinder: K-10PB, Rancilio MD-50
Vac Pot: no like
Drip: no like
Roaster: HotTop
Posted Tue Dec 10, 2013, 8:26am
Subject: Re: Gaggia Classic OPV Mod A One-Time Operation?
 

On the other hand????

I'm  thinking of tuning mine down some more sometime soon.....just to see if I can get it to pull more like a lever, so I guess I'm glad I have it hanging about.....:-))))
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jonr
Senior Member


Joined: 25 Jun 2013
Posts: 290
Location: Americas
Expertise: I like coffee
Posted Sat Dec 14, 2013, 3:07pm
Subject: Re: Gaggia Classic OPV Mod A One-Time Operation?
 

If you want to experiment with lever type pressure profiles, I'd add a variac to the pump.
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jpag
Senior Member


Joined: 9 Mar 2013
Posts: 11
Expertise: I love coffee

Posted Mon Dec 23, 2013, 10:14pm
Subject: Re: Gaggia Classic OPV Mod A One-Time Operation?
 

I did the mod on my Silvia and it was great for a long time.  Then, one day, gushers.  I don't know how, but I checked and my OPV was set too high.  It should be a one-time adjustment though.
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