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Re: EFI vs carburetors
Posted by: "UNSAFE" ()
Date: January 09, 2018 01:10PM

smoking smiley



"UNSAFE"
Kevin Willson
65 Monza
Juneau. Alaska

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Re: EFI vs carburetors
Posted by: American Mel ()
Date: January 09, 2018 03:22PM

Oh Kevin!
I am at work still and you had me Laughing out loud at my desk!
Glad no one was watching me!
Too funny!

.
-----------------------------------------------
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
'66 Monza Coupe - 4spd, 140 Daily driver beater
'67 Monza Vert. - PG, 140 Daily driver beater

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Re: EFI vs carburetors
Posted by: gnvair ()
Date: January 09, 2018 03:28PM

DAVECS1 Wrote:
-------------------------------------------------------
> A throttle body injection setup my work with long
> runners just fine. You can stage the injection
> time based on the Firing sequence. With a large
> enough propagation delay, you may be able to
> account for throttle lag. Also long runners will
> give the fuel adequate time to mix well. Also if
> you control the timing you could mitigate some of
> the lag issues. It would be best to run a very
> flexible control system, like a microsquirt.


Put your injectors over the fan pulley and see if it works as well. Yours are close to the carb pads like Ted's system. That is perfectly ok because the intake log s are part of the cylinder head and heat up quickly. The problems arise with the fuel having to go through the long runners which are out in the air stream.

Lee J



Edited 1 time(s). Last edit at 01/09/2018 03:29PM by gnvair.

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Re: EFI vs carburetors
Posted by: Chilly Willy ()
Date: January 09, 2018 04:30PM

Unsafe that was funny right there. Thanks!
Now back to the regularly scheduled program 😆




The Corvair, Keeping Nader Notorious winking smiley


Will
Northern California

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Re: EFI vs carburetors
Posted by: 63turbo ()
Date: January 09, 2018 06:42PM

American Mel Wrote:
-------------------------------------------------------
> You are correct!
> Some people don't read.
> Because it was actually 3 (Three) questions!
>
> "My question is, is there any benefit in doing
> this? Some folks on another forum have been
> adamant; the carbs if well tuned work better. What
> should I think? Is it worth the $1000/$1500
> investment?"

There's three main things that are wanted from any induction system on cars-
throttle response, power and fuel economy... with carbs you have to pick the
2 things you want it to do well, because the better you get any 2 attributes
the worse that 3rd attribute will be, and it really doesn't matter which 2
you pick, the third will suffer. A well set-up efi you don't make trades like
that. If you've got those three things done well, your car warms up a lot faster, the oil stays a lot cleaner and the plugs wont foul from idling.
On efi, you can let the car sit for a long time, and have it light off on the first try, with carbs, it always seems like its some drama getting the damn thing to start after sitting too long. Efi cars are a heck of a lot more tolerant of air density changes, varying levels of ethanol in the fuel, ambient air temperature changes, and seem to run cooler (at least when port
fuel injected)- that "running cooler" observation probably has to do with the
fuel hitting the back of the intake valve keeping it clean leading to more even fuel air ratios cylinder to cylinder. Another neat benefit with efi is that hot restarts are just as easy as with cold... with carbs its not always that simple, and the more radical the cam is the less simple those hot restarts can be! There's a lot of other minor benefits with EFI but wether it is "worth it" or not... has a heck of a lot to do with what you are willing to
put up with your carb, and everybodys answer to that is different.
One last point... have you priced a modern performance carb lately? sheesh!
4000 smacks for a pair of triple throat webers (or the PMO equivalents) 1200
for a pair of ida's. New performance carbs aren't a very good deal anymore if
going to efi is 1500.
It sure as heck made a huge difference on my car, I cant imagine how its going to run with a good cam, additional head and turbo work and awesome fan!!smiling smiley

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: EFI vs carburetors
Posted by: v8vair ()
Date: January 10, 2018 05:44AM

With Teds FI, you wont have that nice gas smell in the morning in your garage, you might actually get decent fuel mileage and not have to drive it like an Old Lady. If your a Gear Head and have a nice tight engine (not worn out) go with Teds,Do it yourself. Parts are available and its proven. The set up i saw a few years ago at the workshop was excellent, fired right up on a cold morning a performed well and he drove it from the Carolinas ! If I owned a Nice stock Corvair it would be on it. Mike

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Re: EFI vs carburetors
Posted by: DAVECS1 ()
Date: January 10, 2018 09:59AM

It is all about understanding what levers to pull. I can make a carbureted car run super sweet. You need to understand what the engine needs and how to provide it.

My carbs and old distributor remind me of a well worn bible. I had ink marks, scratch marks, extra holes drilled, and numbers for the size of pieces written on them. I would go for a drive and make changes and take notes until it did what I want.

The nice thing with EFI is I have all of those changes on a laptop in front of me with an easy way to keep track of changes.

If you cannot tune a mechanical system you have a snowball's chance in hell of getting EF to run well.

1964 Monza Convertible
110 4 speed
Peoria, IL

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