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| Tofuball's '94 XFi; It's all about city MPG | |
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| Tweet Topic Started: Mar 12 2011, 08:59 AM (39,438 Views) | |
| 100MPG | May 2 2011, 01:03 PM Post #166 |
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WOW, i don't watch tv, so i had no idea that was going on... tornado's,sheesh Dana |
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| Tofuball | May 3 2011, 06:21 AM Post #167 |
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Strange Mechanic
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Head is finally back! 3 angle valve job, new guides, didn't deck it cuz it was flat enough already. Though it's not a regular G10 head, now it's technically a T3 head
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| earthtoad | May 3 2011, 06:50 AM Post #168 |
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Pic's of Port Mods ??......... |
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| Tofuball | May 3 2011, 06:52 AM Post #169 |
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Strange Mechanic
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I didn't mod the ports. I don't want to change too much at once. I just took out casting flash. |
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| mcmancuso | May 3 2011, 10:14 AM Post #170 |
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PICS ANYWAY!!!! |
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| Tofuball | May 3 2011, 01:40 PM Post #171 |
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Strange Mechanic
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OK. I'm at work now though. Also, the exhaust on my car snapped clean right in front of the cat. These cars are pretty loud when they want to be! |
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| mcmancuso | May 3 2011, 02:03 PM Post #172 |
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After I broke both header to pipe bolts I ran the car with open header, man it was loud! Had to buy a new header
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| Tofuball | May 3 2011, 02:21 PM Post #173 |
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Strange Mechanic
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Can I have your old one?
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| mcmancuso | May 3 2011, 02:45 PM Post #174 |
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sorry recycled it already... |
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| Tofuball | May 3 2011, 09:14 PM Post #175 |
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Strange Mechanic
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Aw. BTW, 100MPG, since you can do crazy head work, do you think there is any way to turn one of these into a direct injection engine? Either with the spark plug (gas or multi fuel) or without (diesel) ?
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| 100MPG | May 4 2011, 12:43 AM Post #176 |
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i don't know about crazy. the thing is that i'm an old school carburetor guy and i don't know anything about the new injection styles or types.. its kind of a foreign language to me. the only injection i have any experience with is the type you see on sprint cars. never played with anything electronic or computerized. thats why i don't have the dialog to talk injection with you, anything i worked with had barrel valves and pills. they had no idle circuit to speak of and you had to hand prime the tubes to start them... i simply have no experience with electronic injection. and its not like i'm a factory trained tech that can even diagnose the new stuff.. give me some time here, i'm trying to expose myself slowly..lol... that being said, anything you can think of is possible, you want direct injection?, yep its possible.. whether i can do it or not is another question... i'm guessing that i am a bit older than you are, we have a generation gap of automotive interest and knowledge. or it could just be interest. Dana |
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| Tofuball | May 4 2011, 08:15 AM Post #177 |
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Strange Mechanic
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Maybe. I'm 29. Fuel injection is pretty simple, you've got a computer and some injectors. Injectors are either on or off, they open and close very quickly, the way that the computer controls them is deciding how long to hold the injector open per squirt. It makes the decision on how long to hold the injector open per each cycle based on basic input from a few sensors, the main ones being Manifold Air Pressure, Coolant Temperature, Air Temperature, and Engine Tach Signal. Everything else tends to be optional (TPS, EGT, AFM, O2, etc). Optionally you've got an O2 sensor that will allow the ECU to aim for a specific AFR. Controlling the homogeneity of the mixture isn't as hard as you might think, with sequential fuel injection, you can choose when the injectors fire and for how long- so if you fire just before the beginning of the intake valve opening . . . or somewhere else . . . you get to control where the fuel is during intake. |
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| snowfish | May 4 2011, 08:40 AM Post #178 |
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Basic GearHead
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It has been four pages.
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| Deleted User | May 4 2011, 08:55 AM Post #179 |
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Pics was 4 pages ago. The new standard of the day is live video!
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| Tofuball | May 4 2011, 09:58 AM Post #180 |
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Strange Mechanic
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The only live video I could do that I think that anyone would find interesting would be showing how to tune the computer in my van or something. |
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Welcome to the all new Geo Metro Forum. We hope you enjoy your visit.

I'll get one soon though.




7:24 PM Jul 10