225-231 odd-fire TBI

Fuel injected odd-fire that works fine.
Interesting link
http://forums.off-road.com/jeepster...buick-v6-odd-fire-225-231-tbi-runs-great.html

 

The thing you need to consider when choosing any kit is if your going to be able to find parts in 5 years.

That setup sounds like it uses gm off the shelve parts for the most part. Which is great in my book cause it eliminates the major concern above.

The link that they give does not work?(probably cause the post is from 2000).

Here is a link on here concerning this.
http://www.earlycj5.com/forums/showthread.php?t=19742

 

Yes I agree, I think it's not necessary to do a TBI on a 225 odd-fire, just a carburated upgrated to a HEI distributor it's enough to have a good dauntless engine, it's cheeper and less electronic complications. The availability of TBI spare parts it's an issue.
The carburetor upgrade from Rochester 2G to a Weber DGES synchronous 38 it's a HUGE improvement.

 

Guys there are 3-4 members on here that run TB injection on there Dauntless powered jeeps and have been for years. There are at least 3 guys I know of running megasquirt, I have one finished in the garage just no time to set it up on the jeep.

And no a crab will not work as good as FI, if tuned good they are great but hte FI will always run better in the off camber rough stuff and will almost always give better fuel economy and road manners not to mention it starts easier.

 

EFI also has better performance, all other factors equal. The fuel metering of a carburetor requires a much higher vacuum than EFI does. EFI uses electricity to do the work that vacuum does in a carburetor. Lower vacuum means higher volumetric efficiency and more fuel in the cylinders on demand. Plus EFI is much more reliable than carburetion. Conceptually, once you get over the learning curve, EFI is less complex than the fiddly devices that a carburetor uses. Look at the signals, compare to a look-up table, and squirt the amount of fuel per unit time that the table calls for. Simple.

 

No doubt, EFI is much better than a fine tuned carburetor but a fine tuned Weber 38 air/fuel ratio and HEI advance curve hope engine will has much better performance than original configuration.
I have never seen a TBI Dauntless please McRuff could you post a picture of yours? Have a HEI odd-fire for spark and a magnetic crank sensor(Trigger) on the vibration damper run the signal to an ignition module?
You run a Chevy 4.3 TBI system ?

Thank you

 

Mine is unfinished, if you search the site for megasquirt you will find several threads and posts of the guys that have them already running.

See this most and many more about Megasquirt.
http://www.earlycj5.com/forums/showthread.php?t=75209&highlight=megasquirt+TBI

This member has a megasquirt injected 225,
green71jeep

 

Nice EFI engines
Thank you guys

 

All, I understand the substantial gains from F.I. over carbs, but what happens when the electronics or fuel pump goes bad? Is there a workaround procedure to limp home?

 

Most systems have a limp mode if a key piece of electronics goes bad. Fuel pump is no different then when a fuel pump goes bad on a carb, replace it.

 

The GM ECU has a 'limp home' mode.

Re the fuel pump, you can't put a gas can on the cowl and run from that, but otherwise it's the same as a mechanical fuel pump. Carry a spare, and use an external pump if you worry about being able to get to it.

With Megasquirt (or GM), you could carry a spare ECU... but the electronics are likely the most reliable part of the system. What typically fails are the sensors.

But again, EFI is a lot more reliable than carburetion.

 

Treat it just like your electronic HEI versus points. My points while not as reliable will almost always get me home witha little rigging, if your module goes bad you either replace it or you stay right where your at. The fuel injection nad electric fuel pump are similar, more reliable than carb and better in almost everyway. How many times has your modern daily driver left you stranded? The carb on my jeeps needs rebuilt almost every 2 years, my truck has 240k on it and has never let me down and has never been a part.

 

I seem to remember using a 20oz bottle of gas to get a 90ish chevy TBI off the dunes at Silver Lake after the fuel pump died. Am I rembering wrong? My budy Mike will forever be called Mike-yver for sitting under the hood and squirting.

 

If you squirt gas into the TB, it will run until the gas runs out. The injectors need high pressure to squirt though ... gravity feed won't do it.

 

I misunderstood......