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View Poll Results: Carb or Fuel Injection
Carb 2 10.00%
Fuel Injection 18 90.00%
Voters: 20. You may not vote on this poll

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  #11  
Old 03-27-2008, 07:20 AM
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DaveInDenver DaveInDenver is offline
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Quote:
Originally Posted by Red_Chili View Post
The launch vehicles I worked on had to have 1960s electronics custom manufactured because that was the design that was qual tested. Mac Plus? I only wish. What is the cost of sending a 3lb. NOT gate up in the air?!?
Well, there's using tested technology and there's being silly. Hey, wasn't it you who was calling me silly for sticking with the 22R-E because I knew as much about it as any other engine? ;-)

Anyway, I'm not sure trying to ask Ada and a MIL-STD-1750 MPU to do the thing we are is the best solution, but it's what you got. The problem is not so much finding suitable processors, it's finding rad hard ones. All the people who have good ones go and make them proprietary and either ya can't get 'em or they are very expensive. So we use what we can.
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Drill your fuel rail and install a Schrader valve or pressure sensor.
Yeah, I saw that and the light bulb didn't go on until AFTER I'd reassembled and installed the engine. Duh. Lots of things I wish I could go back and redo...
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  #12  
Old 03-27-2008, 07:45 AM
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Kevin, sounds like you need a new fuel injection system. Chevy TBI is pretty cheap.
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  #13  
Old 03-27-2008, 08:28 AM
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not even a question...stay EFI. My carb runs pretty good, but I tuned it and had to learn to drive it three footed. The only time I have trouble is on big climbs, and I've found several instances where I could've made it had the truck kept running.

Oh and I am pretty sure it vaporlocked on Holy Cross last year...we were making good time heading up, perfect day, and had to stop and wait about 20 minutes for some Rovers...I hop back in to go and she just cranks and cranks and cranks some more. After fiddling with it for 15 20 minutes it started up.

I'd have none of these problems with EFI, my last truck never had a question if it would run or not. I've got all the parts in the garage for it now-anyone up for a head swapping party?
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  #14  
Old 03-27-2008, 06:17 PM
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headswapping party....yes YES!
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  #15  
Old 03-27-2008, 06:30 PM
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No Brainer! Fuel Injection......Do they still make carbs? Oh yes, Summit Racing......
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  #16  
Old 03-27-2008, 09:41 PM
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Quote:
Originally Posted by DaveInDenver View Post
Well, there's using tested technology and there's being silly.
Anyway, I'm not sure trying to ask Ada and a MIL-STD-1750 MPU to do the thing we are is the best solution, but it's what you got. The problem is not so much finding suitable processors, it's finding rad hard ones. All the people who have good ones go and make them proprietary and either ya can't get 'em or they are very expensive. So we use what we can.
Heh. How about a Rockwell 1802 (the predecessor to the 1602 used in the original Apple IIs)? We used to used them in our thick film hybrid (more 1960s space technology) because they were reliable at 150C due to being rad-hard and 100 micron features helped. With a 1MHz clock these eight bit bad boys were smokin!

As for the FI vs carb debate, my take on it is given the choice (with financial and practical concerns taken into consideration), my carbed cruisers do fine, but I look forward to that TBI and megasquirt conversion one of these days. My vote is for FI.
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  #17  
Old 03-27-2008, 10:03 PM
J Kimmel J Kimmel is offline
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Quote:
Originally Posted by Rzeppa View Post

As for the FI vs carb debate, my take on it is given the choice (with financial and practical concerns taken into consideration), my carbed cruisers do fine, but I look forward to that TBI and megasquirt conversion one of these days. My vote is for FI.

there is an interesting point...exactly the reason I have this far stayed carbed. I was getting ready for a trip, figured out the head wasn't compatible, and frankly spending the money for a new head at the time wasn't really an option so carbed it was.
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  #18  
Old 03-28-2008, 01:01 AM
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Interesting discussion...What do you all think the typical cost would be to FI and 2F in a 40?

My reason? I have a Weber carb on the 40 now which seems to be a pretty unpopular choice for many I've spoken with. Going back to stock doesn't seem feasible at this point given what I know has to be done to swap out to a Weber. I know some of my issues with the 40 are carb related (those on the 40s only run know what I mean) which are beyond my skill level and I haven't found anyone in town that wants to work on a Weber - I know I probably need to rejet the carb for the higher elevation (40 came from CA) at a minimum.

So, are we talking $1000s or $100s or ?? to FI a 40? Maybe FI would be the answer to my problem on that score...
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  #19  
Old 03-28-2008, 07:22 AM
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I like Webers in general. They improve much with proper jetting. They are as precise as motorcycle carbs, which is pretty darn good.

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  #20  
Old 03-28-2008, 08:08 AM
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I know people seem to dislike the Weber 38/38 on the F engines, but in the mini truck world the Weber 32/36 on a 22R with a mild cam is supposed to be the bee's knees. But at the same time a tuned stock carb on the R motors isn't a terrible carb either. Dean's 20R with it's rebuilt stock runs very nice,but he's flooded a few times when we've been out.

On a 2F I wouldn't necessarily go out of my way to do a FI swap, but then again I never had much issue with that Holley 2300 on Root's truck with the limited stuff I did with the 40. Once he started using the Technicolor Cruiser to its full potential, the Holley limitations became obvious. In my mind it's a matter of application. A well tuned carb works just fine and is simple, but if you find you need FI, then you need it.

But keep in mind that there are critical sensors in FI which if they go bad, there ain't much you can to do jerry rig it to run. So your repair plan needs to include more spare parts rather than just bailing wire, JB Weld and NASCAR tape. Ideally for a long trip you'll have backups for the critical stuff and that's not chump change.
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