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Underbody braces, turbos and more!

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PostPosted: Mon Nov 07, 2005 5:30 pm 
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Joined: Fri Sep 17, 2004 5:41 pm
Posts: 89
Location: Irvine, Ca
I wanted to see what other owners are getting for gauge readings on other metros/suzikis.

I put a vacuum gauge on a few weeks ago. It does all kinds of neat dancing. I know the generalities of what readings mean, but I don't know exactly how this relates to others using it on a Geo/Suziki or for pure economy.

My '94 XFi (inchs of Hg):
Idle, jitters between 22 and 20
Light City Accleration, usually I can keep it no less than 10.
Steady state city (4th or 5th gear about 40mph), about 15
Highway acceleration, usually I keep around 5, if I try for much more than that it takes forever to get up to speed.
highway steady state (5th gear 60-65), 13 to 15
Highway Steady State drafting, 15-20, avg about 17.

I figure 1.3L could do a little better on the vacuum if they focused on it, but would still burn more gas.

I also have a high idle problem right now. Everytime I pull to a stop it runs at about 2000rpms and 24in of Hg then after 30seconds it comes down to normal. Does this sound like too much spark advance?

Jay W
505/287 Dakota


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PostPosted: Mon Nov 07, 2005 6:55 pm 
There seems to be lots of things that have an effect on idle speed. I can tell you that in my case it was a vacuum leak. Not in one of those little vacuum hoses around the EGR valve, my leak was in the big hose coming off the manifold going to the brake booster. Lots of people talk about problems with the TPS but I have not had that problem on my 94 Metro so I can't give you any ideas there. I have also heard that the O2 sensor just sort of slowly wears out and can effect idle as well as emissions and mileage.


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PostPosted: Mon Nov 07, 2005 6:57 pm 
I have a vacuum guage but I can't figure out how to get a vacuum hose thru the firewall. Where did you run your vacuum hose? Sometimes I wish I had an XFi and sometimes I am glad I have A/C.


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PostPosted: Mon Nov 07, 2005 7:01 pm 
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Joined: Fri Sep 17, 2004 5:41 pm
Posts: 89
Location: Irvine, Ca
Popup wrote:
I have a vacuum guage but I can't figure out how to get a vacuum hose thru the firewall. Where did you run your vacuum hose? Sometimes I wish I had an XFi and sometimes I am glad I have A/C.

Its real easy when your interior is stripped, just pick a whole :-)

Maybe try to squeeze through with the speedo cable?

Jay W
505/287 Dakota


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PostPosted: Tue Nov 08, 2005 9:26 am 
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Joined: Wed Nov 10, 2004 1:27 pm
Posts: 1033
Location: Kenosha, WI
I have a vacuum/boost gauge on my N/A (for now) 93 Metro G10.
I also have a list of mods (see profile).

Idle bounces between 10-15" @ 1000 RPM (street/strip 3 tech cam)
Low speed cruising it goes up depending on throttle opening 15-19"
Highway @ 75 MPH steady cruise with no head wind is usually 5-10"

I routed my vacuum line thru the speedometer cable gromet on the firewall.

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M3----"M" body "3" cylinders.
Now Turbo'd

"M3 like the BMW?"
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PostPosted: Thu Dec 15, 2005 2:41 pm 
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Joined: Sun Aug 28, 2005 6:24 pm
Posts: 61
Location: Deer Lodge, Montana
My XFI used to cruise on the highway at around 9 inches of vacuum. Now with the SRD header, it reads about 11-12, average. This is at around 65 mph on the interstate with little to no wind and it's around a thousand foot above sea level in the winter.

I've seen it as high as 15 at cruise depending on temperature and elevation.

Jeremiah

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55 MPG daily driver


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PostPosted: Sat Nov 10, 2007 4:52 pm 
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Joined: Thu Mar 15, 2007 10:23 am
Posts: 528
Location: aa
i know old thread but here's the vacuum I'm getting.

16 at idle ( i think thats low, going to look for vacuum leaks)
around 5" when accelerating to 55mph on highway, and then 10" steady maintaining 55-60mph
Foot off gas, decelrating = 21"

I have never seen it go above 21" when decelerating. I am getting only 45mpg. Where should I look for vacuum leaks?


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 Post subject: vacuum
PostPosted: Sun Nov 11, 2007 8:36 pm 
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Joined: Thu Jul 19, 2007 8:21 am
Posts: 84
Location: brazil, indiana 47834
idle, 19
accel, try for ten sometimes less
at about 55, 11
decel, 23
soon to get 3tech cam gear :D and then update, and
just put "shaker" hood on a 93 1.0 :shock: :roll:

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trying to go turbo but the wife thinks it will cost too much for my 93 metro so now i have to "wheel & deal" my way there, any help would be great.


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PostPosted: Fri Jan 18, 2008 4:00 pm 
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Sad but True...

Joined: Fri Jul 27, 2007 8:20 pm
Posts: 2973
Location: Saskatchewan
on the tired motor it was crazy, had basically the mods in the profile but stock pistons/rods and worn out bores with <120psi compression all over, but it got 17 at idle 1200rpm with the stock cam, and about 13 with the bigger one.

cruising in city was about what idle was, so 12-13. acceleration was usually +12 though ;)

got me 23mpg before it blew up, soon to be alive once again with some new numbers with lots new

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1991 Swift GT Build G10 +25 psi + other goodies
1996 Metro Build QR25de swap, still undecided where to take it
the lolcar family


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PostPosted: Thu Mar 27, 2008 5:03 am 
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Joined: Sun Mar 16, 2008 9:30 pm
Posts: 47
Newly acquired 93 GT. Only getting about 7" at idle. Poor running. I'll check the brake booster and other vacuum connections.


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PostPosted: Thu Apr 24, 2008 7:50 pm 
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Joined: Tue Apr 15, 2008 10:57 pm
Posts: 67
Location: colorado
Do you have pictures as to where you hook up your vacuum gauge? I would like to hook up some of these gauges people are talking about. I can't hook up the fancy one's cause I don't have the connections. I have the older '92 Geo Metro 3 cyl 5 speed car. I changed out the instrument cluster panel so I could get a trip meter, that was a big improvement. :mrgreen:

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Jon

'91 Geo Metro 3cyl 5 speed 12" wheels 50 + MPG.
'37 Chevy Coupe
'00 VW Passat 4Motion Wagon
'95 GMC Pickup short bed 4x4
'82 28 foot rv, but diesel is too expensive to drive now.


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