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Re: 1972 340 w/400-450 HP what is a good carb setup. [Re: Mr T2U] #2513233
06/25/18 09:31 PM
06/25/18 09:31 PM
Joined: Jan 2003
Posts: 12,039
Benton, IL.
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DaveRS23 Offline
Special needs idiot
DaveRS23  Offline
Special needs idiot
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Joined: Jan 2003
Posts: 12,039
Benton, IL.
Well.....your estimate for the cheapest EFI system is still over twice the price of the carb set-up. And will probably pass triple the price for many users. And that is still the cheapest set-up with an external pump, no costs for sumping the tank, assuming the installer can handle all the connections, etc. And that cheapest kit is not necessarily the preferred set-up.

What about ignition control? Seems important to get the most from an EFI system. Any extra costs or labor to that?

You seem to have more carb problems than the rest of the posters here. Personally, I do not experience the issues you list with my carbs.

If you want to believe that the cheapest EFI system that is 2 or 3 times the cost of the preferred carb is the way to go.....then go for it. But at least be honest about the comparison and compare apples to apples.


Master, again and still
Re: 1972 340 w/400-450 HP what is a good carb setup. [Re: Barrelhouse] #2513245
06/25/18 09:47 PM
06/25/18 09:47 PM
Joined: Jan 2003
Posts: 6,840
The Swamp
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Sixpak Offline
master
Sixpak  Offline
master
S

Joined: Jan 2003
Posts: 6,840
The Swamp
Back in the day a 3310 Vac sec Holley was the go-to carbs on thousands of builds. Funny that you don't hear more about them any more. But I'd put that carb on anything from a 340 to a 440 and not worry about over carbing it or it running too fat. Great carb to learn tuning on; swapping jets in the primaries, springs in the secondary diaphragm and plates or jets in the secondaries.

Re: 1972 340 w/400-450 HP what is a good carb setup. [Re: Barrelhouse] #2513257
06/25/18 10:20 PM
06/25/18 10:20 PM
Joined: May 2005
Posts: 4,713
Florida
BDW Offline
master
BDW  Offline
master

Joined: May 2005
Posts: 4,713
Florida
I have $1800 into my Fitech conversion, all the little extras do add up.
I went with a new Spectra tank with in-tank fuel pump, so that was $260 just for the new EFI tank. Start adding in the extra fuel & return lines, modding exhaust for O2 sensor, etc.................

But, the car is so much more enjoyable to drive.
The biggest benefit is the greatly reduced stinky gas smell is almost zero.
My daughter didn't want to go for rides when car was carbed, "my clothes smell like gas and I have to take a shower"

The closed system lowering the smell and no more hot starts issues have sold me on EFI. Would never consider a carb again.

Re: 1972 340 w/400-450 HP what is a good carb setup. [Re: Barrelhouse] #2513514
06/26/18 02:59 PM
06/26/18 02:59 PM
Joined: Feb 2007
Posts: 2,578
sweden
1
1Fast340 Offline
master
1Fast340  Offline
master
1

Joined: Feb 2007
Posts: 2,578
sweden
That sixpack you got will have more than enough CFM for your powerlevel,the intake might not be perfect for this but if you already have it just run it,it might take some time getting the tune just right but its a damn cool intake/carb combo smile

Re: 1972 340 w/400-450 HP what is a good carb setup. [Re: Barrelhouse] #2513684
06/26/18 10:42 PM
06/26/18 10:42 PM
Joined: Nov 2006
Posts: 1,074
Manitoba Canada
67autocross Offline
super stock
67autocross  Offline
super stock

Joined: Nov 2006
Posts: 1,074
Manitoba Canada
I have a 750 AED on my 450hp 340....it’s one of the reasons it’s making 450 plus...


A new iron curtain drawn across the 49th parallel
Re: 1972 340 w/400-450 HP what is a good carb setup. [Re: Mr T2U] #2513717
06/26/18 11:37 PM
06/26/18 11:37 PM
Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61 Offline
I Live Here
justinp61  Offline
I Live Here

Joined: Oct 2003
Posts: 11,684
W. Kentucky
Originally Posted By Mr T2U


maybe a little more. i would figure about $1K for a COMPLETE FITECH system with external walbro fuel pump and lines.
from what i have read they are pretty good overall system with a not so complicated setup.
once installed with the basic parameters programed in. then a couple trips around the block it's ready to go. it's self learning so the more you drive it the better it runs.

now with a carb the initial buy in is just part of the price. the weather changes you have to re jet and adjust, the weather changes you have to adjust again. with the alcohol mixed fuel it will eat the seals, accelerator pumps, and floats. now you gets leaks. really hot day you get vapor lock. sit for a while when hot and the fuel boils in the carb. sit for weeks at a time you have no fuel in the car and have to crank and crank until it starts.
i know i am exaggerating a bit on the problems, but they do happen a lot. jets, gaskets, air bleeds all cost $$. it adds up. when i had my hemi with a carb i was adjusting it almost every other day. the temp changes 15* and adjust again. runs great in the morning runs a little rough in mid day runs like crap in the evening. or maybe runs great in the AM and PM runs like crap in the daytime.
self learning FI almost none of the listed problems happen. hop in and drive. even when it's running a bit off, it is probably running better than a carb could hope to.
i know it's not a FITECH system. but my 08 supercharged mustang the only thing i have to do is fill it up and drive. change the plugs 1 time a year and change the oil every 2K miles. car makes 650rwhp on pump 93, runs 10's all day long at the track if i don't miss a shift, drive it to the track, drive it home and gets 25mpg. never had ANY of the above listed carb problems.
the only thing i do to it is load my race tune at the track, 5* timing and richen it up a little bit with my hand held tuner don't even have to open the hood to do it.


Bull $hit. I read that if frogs had wings they wouldn't bruise their arses when they landed.

Re: 1972 340 w/400-450 HP what is a good carb setup. [Re: justinp61] #2513718
06/26/18 11:40 PM
06/26/18 11:40 PM
Joined: Feb 2005
Posts: 20,166
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

Joined: Feb 2005
Posts: 20,166
PA.
Good old 750 Holley double pump worked well for me.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: 1972 340 w/400-450 HP what is a good carb setup. [Re: Barrelhouse] #2513894
06/27/18 01:48 PM
06/27/18 01:48 PM
Joined: Apr 2005
Posts: 1,322
Michigan
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crlush Offline
pro stock
crlush  Offline
pro stock
C

Joined: Apr 2005
Posts: 1,322
Michigan
Id say 750 dp, but my next project i would like to try a Fitech.

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