question for carb experts?

[wrench87]

i have been looking into different carbs for my 445 fe and at one time one of the kirkhams had mentioned he liked the holley 830 with annular boosters this is the one that has no choke but still has the choke horn it is under 500.00
it lists that it has a competion fuel curve. i like the carb but do not like the choke horn, i also see that holley has a nascar 830 carb with either annular boosters or with down leg boosters this carb has no choke horn but has a race fuel curve. here is my question what is the difference between the competion fuel curve and the race fuel curve and can the race curve be changed to be used on the street?.

[prostangrr]

Hello
I have an 830 Holley on my 414 windsor and like it the most out of any other carb I have used. The engine is in a Fox body mustang and makes about 650 HP and runs 9.90s in the 1/4. The car idles great with very little warm up time. prostangrr

[wrench87]

which model do you have the one with the choke horn # 0-9381 or the nascar 830 # 0-80511-1

[Mdman352]

I use a QuickFuel 850 on a 454 FE and love it. It is much more responsive than the Holley 800 that it replaced.

[Gaz64]

The Holley 830 annular was a great carb in its day, and still is, BUT there a way better carbs out there now.

Being an early carb made of porous zinc alloy, they are plagued with issues brought on from porosity.

The billet carbs, (QFT, Proform, Demon, etc) don't suffer from this, have many more adjustable features, can be tuned up AND down.

The early Holleys don't have 3 or 5 stage emulsion bleeds that you can tune etc.

My choice has been QFT (Quick Fuel Technology) and I will stick with them.

[MT nester]

race fuel requires different curves to the jetting and different emulsion tubes.
IMHO a carb set up for race fuel would be a PITA to DD

[wrench87]

all i need is most likely a 750 hp?, when i e mailed barry grant last year they reccomended a 825 mighty demon road race but they went under si that was why i was looking at the holley 830's. i have been told to call prosystems i like looking around and researching and hearing different opinions.
this is just a street car so i want the best driveability, i dont want a vacuum secondary carb or one with a choke horn due to height restraints, i know it is not the ideal set up but i want to run a turkey pan.

[Grubby]

Buy the carb you like with choke horn and mill it off on an end mill.

John

[SPF1061]

I have a Roush 427R. I have used some of the carbs and builders you mention.
The folks that really nailed it for me were AED Performance.

AED Performance Racing Carburetors, Holley Carburetors, and Performance Holley Carburetor Parts

Check out their website. You might want to give them a call. They are very knowledgable and good folks to work with.

[JBCOBRA]

+1 on these guys. Very nice and top notch service/expertise

Originally Posted by SPF1061

I have a Roush 427R. I have used some of the carbs and builders you mention.
The folks that really nailed it for me were AED Performance.

AED Performance Racing Carburetors, Holley Carburetors, and Performance Holley Carburetor Parts

Check out their website. You might want to give them a call. They are very knowledgable and good folks to work with.

[ERA Chas]

Originally Posted by JBCOBRA

+1 on these guys. Very nice and top notch service/expertise

++ on AED-John Dickey is a smart, class guy. His stuff works.

[Rick Parker]

You might consider checking with the Roush Fenway guys. If the Sprint Cup guys are going to FI shortly there may be a lot of top notch carbs that will be ready to hit the market from all teams.

[ERA Chas]

Originally Posted by Rick Parker

If the Sprint Cup guys are going to FI shortly there may be a lot of top notch carbs that will be ready to hit the market from all teams.

NONE of which will idle and street-drive on a 400HP 347.

[prostangrr]

The 830 that I have came with the choke. I milled off the choke. This is a very nice carb for street or race.

[Rick Parker]

I have been looking into different carbs for my 445 fe and at one time one of the kirkhams had mentioned he liked the holley 830 with annular boosters this is the one that has no choke but still has the choke horn it is under 500.00

ERA Chas???

NONE of which will idle and street-drive on a 400HP 347.

???? Where did that come from?

[wrench87]

the engine is done , i just painted the block the other day a lot harder to do when the engine is assembled it took me 1 1/2 hours to tape every thing off, i have been out of work so no money for a new tko 600, i have a 3550 on my 342 now.
basically it is a 72 390 block .030 over steel 4.250 crank, eagle 6.7 h beam rods, diamond pistons slight dish, keith craft stage 1 heads with a little more work done, crane t bar lifters, erson rockers, comp hydraulic roller .598-.618 lift 230 238 duration 112 lobe center, ported performer rpm manifold, ram aluminum flywheel, big block chevy performance clutch. i am running a 400 hp 342 stroker with mass flo fuel inj, i have to change the fuel pump in my fuel safe cell, select a carb pull the efi harness out and just wire a new circuit for the fuel pump and install a msd 6al box.

[wrench87]

here are a couple of pictures.

[blykins]

You must have got the flywheel and clutch from Mike Forte...

Sounds like a very solid, streetable engine. You should post some pics of it. Very mild cam, the engine will probably be done by about 5000-5200 rpm.

With that focus on a mild, streetable engine, I think a nice 750 mechanical secondary carb would be my choice.

[wrench87]

yes i bought the clutch and flywheel from mike, when i originally planned out the motor i was going to use mass flo fuel inj on it so that was the cam keith picked out, i had a victor series efi manifold and 42 pound injectors but i sold all the efi stuff to go carb.

[wrench87]

hopefully this week or next week, i am running irs so i have been running 600 pound coil overs with pro shocks frnt and rear, i am hoping to be able to sell the 342 with trans so i can buy a new trans and carb for the 445 but the 342 now has 12,000 miles on it . its amazing i built the car i 2004 registered it oct 2005 and i already have 12k on it.