eldebrock 600

       A  L  A  N   F  R  A  K  E  S   ~  Tulsa, OK    

Having tried most other than the demon, here is my 2 cents.

Edelbrock: starts like crap, need to pump the hell out of it and turn car over several times before starting (hard on starters wires cylinoids and doesn't look good in front of people when hard starting) although once running doesn't perform too bad good and tourquey but poor fuel economy. Every edelbrock on anything ever run acted the same way.

Holley: Best starting, let car sit 6 months and just touch the key and the car is running in first revolution of cranking over. excellent all around performance but they are sensitive and need regular maintenance and tuning. moderate economy.

4100: Starts almost as good as the holley, sometimes have to give one or two pumps and car is running within one or two revolutions of cranking over. Smoothest operation, best economy, Best fuel atomization of any carb ever built, least maintenance, can't leak. The number one choice for all around carb.

BG Race demon: Coming later at a dragstrip near you.

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

I have a 57 312 with an air cooled FOM, mild cam and haved used a holley 4160 model 1850a, 600 CFM for a lot of years and I like it a lot. Pete

I have tested Motorcraft 2100, Carter AVS, Quadrajet and 600cfm Holley.



Hyvinkää, FI

Autolite 2100, Holley 600 and now Street Demon "something"...

Still adjusting and tuning.

-jyrki from Finland-

www.hollowheads.net

oK, So  I've had 2100, holley 2300, Autolite 4100 1.08, & 4100 1.12, & 1.08 with ported secondaries, early q-jet, & am currently testing an early rochester 4-G on my f100.

I am pleasantly surprised at the top end with the Autolite 1.12, but of course dissapointed at the throttle response & low end.  

I belive the throttle response on the tiny rochester 4G will be impressive once I get the linkage road worthy to test.  It makes me want to re-visit the Q-Jet, this time with a better test specimine, armed with my box of jets & meetering rods & hangers.

In street trim the y seems to love the velocity of the small venturi, but the funny ports seem to like the flow capcity of a larger carb... Maybe it will be a best of both worlds??

Or am I just bench racing again???? 

570 Holley Street Avenger - Runs pretty well, but I've had a hard time getting a good fuel mix across all RPM.

Before I change carbs, I'm going to pull my Holley Megascoop air cleaner and try something else.  I was told by Rob on here that they don't work very well and I should replace it with a velocity stack.  I've also read that this carb might be a little big???

- John

John: Lake Forest, IL



'57 Fairlane 500 - Looking better every day.

New Punk,

Your right I did say that. I am running a Holley 4150 (600CFM) and it runs great. It might be oversized since it is sitting on a stock motor. I'm not sure what jets are in it, but they must be small for it does not run rich. As for the B&M Mega scoop, I was quite surprised as to how restrictive the filter element was. It looks like a K&N filter. Even after washing it, it didn't seem to make much difference. I got better performance with a regular 10" open element Fram, paper filter? I have now finished building my ram air box to mate with my scoop, and will be rebuilding my spare carb this winter and playing with the jetting.

Rob

I love the smell of burning rubber in the morning!

Ok, so even though the throttle response was crisp on the rochester 4-G, I was dissapointed once on the road.  Low end was still incredible, however I think the port for the fuel to the secondary float is either clogged, or the secondary float is stuck in the up possition.  when I opened up the secondary the thing didn't get any additional fuel.  Sounded real bad.   What can I say, I rebuilt this thing like 10 years ago, It's been sitting wrapped in plastic since then. 

On the flip side, I am currently making a solid attempt to bore the secondary throttle bores on my 1.08 to allow for the larger butterflies from the 1.12.  The venturi is already a shade larger from my earlier re-working a few years ago.  My hope is to have my own version of a spreadbore 4100 that will be somewhere around 550 or so cfm, the bulk of that on the secondary side. We'll se if I can bore a round hole since I don't exactly have a machine shop here!

I could end up dissapointed & calling up BG for a 525 road demon jr!

Two factory teapots on my 56 T Bird

One short

One stout

I'm a little teapot-short and stout