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Thinking again ...
We are still asking:
What did you
get done on
your Bolt today
????


The question, initially posted May 23, 2005, was:
"Whatcha do on your Bolt
this weekend?"

After 51,906,997 views, 7378 replies over 185 pages, this thread in General Truck Talk is a happening! And it's not just weekends anymore.


Now with pictures
and No BOTS.


So ...


What did you get done on your Bolt today????


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Re: Holley Sniper EFI
Fibonachu #1436703 Sun Jan 09 2022 07:23 PM
Joined: Nov 2002
Posts: 2,347
C
Carburetion specialist
MoParGuy - please do not judge all Carter carburetors by the smog-friendly AVS. It was (opinion) the worst 4-barrel Carter ever made. We refused to rebuild them because there was a 100 percent probability that the customer would have issues. The carb was designed for smog emissions. Any performance, driveability, economy, etc., was a secondary consideration. Chrysler V-8's, from a smog standpoint, were dirty, and required special carburetors to pass smog emissions. Chrysler used these from 1968~1971, and then they were discontinued. Chevrolet tried them on one engine in 1966, and later suggested they be replaced with the 1965 carburetors.

By contrast, I have two genuine Carter AFB carbs on one of my shop trucks (advertising, but performance and economy as well). These work with no issues in high 90's, low 100 degree days in Missouri. I can get real gasoline, but have calibrated the Carters to run on the cheaper E-10, which is what I run in this vehicle. I did add an electric fuel pump because of hard starting when the ambient was in the high 90's.

The Carter AVS, along with the Rochester B, might be the best excuses for efi wink On a more serious note, if I had to traverse multiple altitude "zones" daily, I might think about the possibility of considering efi.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify
If you truly believe "one size fits all" try walking a mile in your spouse's shoes!
[image]http://www.thecarburetorshop.com/Avatar.jpg[/image]
Re: Holley Sniper EFI
Fibonachu #1436707 Sun Jan 09 2022 08:05 PM
Joined: Sep 2013
Posts: 1,406
M
'Bolter
Jon, thanks for the reminder. I do have a good Carter Competition 750 AFB on the shelf. I honestly don't recall if I bolted it on while dealing with the boiling fuel issue. However fact is I think it was more a case of heat radiating off the pavement, a lot of engine in a small compartment and heat soak of the carb that caused the issue. As mentioned, no ethanol or go fast enough to keep the engine compartment cooler and no issues.

On fuel pressure, I was running a electric pump with 50 psig output and a Holly pressure regulator with a 4.5 or 5.0 psig output. To operate the FiTech I just pulled the pressure regulator and added a return line.

I do love carbs, but Fi does have it's place, at least in my shop. That place would be on a engine that starts instantly no matter how long it's been setting, runs the proper AFR all the time, and gives a easy way to tune a number of pramaters with ease.

Now the 340 Duster here [forabodiesonly.com]is perfectly happy with its phenolic body spread bore carb.

Am I advocating Fi for our truck? No sir, not at all.

RonR

Last edited by moparguy; Sun Jan 09 2022 08:13 PM.

1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1951 Farmall Super A



Re: Holley Sniper EFI
Fibonachu #1436708 Sun Jan 09 2022 08:09 PM
Joined: Oct 2015
Posts: 361
P
'Bolter
I'm not a carb guru , neither am I a mechanic , but I have an old truck for the sheer joy of driving it .
It has a carb with a manual chock that breaths through an oil bath filter because I understand that system .
I do carry a spare functioning carb just incase which I can change in half an hour, but have not had to use it in the 30,000 miles I've driven this truck .
For me it's a comfort zone I chose not to leave for minimal if any gain .
As for the moniker DINASOR , I like it , I might even get a personalized plate with that as it might represent me and my stovebolt .

John


good planning is no substitute for dumb luck
Re: Holley Sniper EFI
moparguy #1436737 Sun Jan 09 2022 10:42 PM
Joined: Dec 2018
Posts: 1,462
F
'Bolter
Moparguy On your FITech system is it a 1 barreland what kind of economy will it produce ?? Had to have some tuneup work on my only propane injected 04 GMC with 4.8 engine. It has been fine but once you leave home LPG is always expensive,not hard to find on the interstate. Propane buying is a summer sport and you need storage,so your holding it in hot weather when pressure is the highest.My injection mechanic said when gasoline goes hi he starts getting calls for LPG installations. Get 14 MPG computes to about 28 compared to gasoline. I wonder if lp vapor injectors might be useful on 235/261.

Re: Holley Sniper EFI
carbking #1436738 Sun Jan 09 2022 10:52 PM
Joined: Dec 2018
Posts: 1,462
F
'Bolter
carbking I had one of those AVS Carters on a 66 275 HP malibu ran great the whole time I had it,tuned the secondary air valve for a perfect transition got good economy on sunoco 260 this was in 70-71.

Re: Holley Sniper EFI
Fibonachu #1436762 Mon Jan 10 2022 12:59 AM
Joined: Sep 2013
Posts: 1,406
M
'Bolter
fixite7, to guide our conversion back in a Stovebolt direction, to the best of my knowledge FiTech really doesn't have a unit that's marketed for our size engines. They do have a two barrel unit that's good for 400 hp. Will it work on a sub 100 hp engine. Perhaps, I really don't know. Holly's Snipper division has a one barrel they say is for 144ci to 300ci, 4 and 6 cylinder engines with throttle bore of 1.4375" and good for up to 175 hp. If I were considering Fi for one of Stovebolts with a original engine I'd give the Snipper a hard look.

My FiTech is on a 302 V8 (bored 60 so it's actually a 310) and is a 4 barrel throttle body that the uninformed would think is a 4 barrel carb. MPG hasn't been a concern but it runs from high teens to high 20's depending on how much fun I'm having in the little car.

RonR


1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1951 Farmall Super A



Re: Holley Sniper EFI
Fibonachu #1436775 Mon Jan 10 2022 02:53 AM
Joined: Apr 2005
Posts: 2,997
C
'Bolter
As far as trouble on the side of the road it should not happen till at least 200k with an injection unit, I can live with that.
My nephews T-bucket has a 406 Ford that came with three 2bbl carbs---IMPOSSIBLE to live with. Now has three FiTech 2 bbls that start instantly, idle baby butt smooth, and will ruin a pair of rear tires in short order.

Last edited by coilover; Mon Jan 10 2022 03:02 AM.

Evan
Re: Holley Sniper EFI
Fibonachu #1436787 Mon Jan 10 2022 05:34 AM
Joined: Feb 2004
Posts: 24,297
H
Kettle Custodian (pot stirrer)
Throttle body injection was a temporary fix so the car makers could buy a little time and keep selling cars when the government got serious about emissions and gas mileage in the late 1980's, until they could develop reliable sequential port fuel injection systems and variable cam timing to replace EGR valves. The aftermarket guys jumped on the TBI bandwagon to offer a system that could replace a carburetor with a minimum of modifications and a somewhat rudimentary computer. TBI is neither a carburetor nor a fully developed fuel injection- - - -it's sort of a "good enough" halfbreed to attract the attention of people who want something different to play around with.
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

WAG MORE- - - - - -BARK LESS!
Re: Holley Sniper EFI
coilover #1439923 Thu Feb 03 2022 06:05 PM
Joined: Dec 2018
Posts: 1,462
F
'Bolter
coilover Can agree with you on dinosaur museum for LIQUID carbs,now vapor carbs which are highly responsive rule the loading docks !!

Re: Holley Sniper EFI
Fibonachu #1440073 Fri Feb 04 2022 07:30 PM
Joined: Feb 2021
Posts: 16
R
'Bolter
I did this adapter for a 292 guy to add the Holley Sniper 1100 to his 292 build.

https://scontent-iad3-2.xx.fbcdn.ne..._b_yuEH_dnUc2B3Bc3PkusPg&oe=6202506E

I have also built my own system based on the FAST EZ-EFI.

https://scontent-iad3-2.xx.fbcdn.ne...nLRpEUutW8oti7wGLlbJvL7g&oe=62216E8D

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