duel quads
 

who here runs 2 4's,and is it very streetable

I have them on 2 cars,VERY streetable.I have a 2-4 bathtub tunnel ram on a 446 in motor and a 2-4 flat dual plane on a 366CI motor.There is a pic of the flat intake in the 61-63 tempest tech under 63 safari.Tom

I run dual Holley 660's on a Wenzler tunnel ram on my D port 462 in my 68 Firebird. On my combination after some moderate modifications this setup is extremely streetable. It starts right up cold with no chokes in winter. I drive it around the block, or to the track and race it, or to the shore 2 hours away. No problems no complaints. I have also had stock 660's on an Offy with spacers and they were real crisp with no modifications. Never ran dual q jets or vac sec Holleys but by their nature (the Q Jets) should be phenomenal,... tuned correctly of course. Go for it.
Ray

just need to get a 2x4 intake.[cheap]dreaming??

they show up on ebay all the time.IMO the Offy is the better and the buick-pontiac EARLY AFBs are the easyest to street drive.Tom

Tom, I see on your safari (wow that's gorgeous) that you run progressive linkage. Is the other setup the same? I've only run a direct link and played with bellcrank etc to slow down throttle vs pedal travel. BTW I love your collection RA Vs etc. Ray

Ditto. (2) 750's on a Wenzler T-ram with a big solid roller. Very streetable (in my definition) and more response than the Victor/Dominator it replaced.

I run the factory SD progressive linkage on all street 2-4s.I set them up solid to race them.WAY easyer to drive on the street and actually gets good gas mileage.My 421 SD motor with a factory bathtub and a pair of NASCAR 750CFM AFBs gets 16-17 MPG in my coupe.Tom

I do have a pair of custom Tom Vaught 660s with double hump arms on my 2-4 303 RA V Xram intake.The motor really did not like them on the dyno as too much too soon.We cant run any vac sec or double pumpers on the intake.Next time we are trying a set of 450 CFM man sec holleys.REALLY would like to get it driveable for my T/A.Tom

Tom I had the same problem of too much too soon. First I reworked the primary metering blocks from 2 600s (w/ power valves) to matching air and fuel circuits and jetted downto 65 jets. then i ground the hump in the throttle arm to delay the secondaries somewhat. Lastly I replaced single hole pump cams with double hole cam of same profile (From double pumper 50 cc pump) in upside down position , or standard position on dp carbs. Oh and screw in high speed air bleeds on primaries helped too. All of this made it very very streetable. I drive the car as often as possible. Ray

remember my motor is only 390CI with ports that really dont come on strong untill 4000RPMs!We started the dyno pulls at 3000,next time we will start them at 4000 so we dont bog the motor.If AFBs would work on the Xram,I would use them in a heartbeat.Tom

modified 660's on wentler t ram.

Tom I understand entirely, my cam is still sound asleep at 3000 rpm, but when it wakes up it has a very bad attitude. I also locked the timing at 34 and by adding 2" headers and 3.5" exhaust was able to idle down from 1200 to 900 before touching mixture screws. BTW at this point I can cruise around in 5th (OD) at 1200 or 1500 rpms and roll into the gas without a bog. That took a lot of work. But I wish I had your challenge. I've seen two RA Vs though. ok so one was a bare 303 block and rods. Maybe someday. Ray

Firebird, I just bought an Offy 2-4 intake with Holley 600's. Check with Glen at 630-649-1700 or [email protected] for an Offy intake.

Cool set up.

I will be running a similar set up on my '63 Le Mans when it's done. My intake still has 2 Ron's flying toilets on it (alcohol injection). I plan on changing to carburetors since I don't want to run alcohol on the street.

I still can't decided if I'm going with Holley's or AFB's. :confused:

Can you give us some more info on your combination?

if you want it to "look" anything nostalgia go the AFBs and the correct aircleaners.JMO,Tom

Tom,
 

who has the original AFB's and air cleaners for sale?:) I'm using an offy high rise intake with modern AFB's and aftermarket air cleaners.

Is a single 4 faster though?
 

I've often thought of running the Edelbrock 2x4 intake under the hood of my Formula for something different but have already read that a single 4 is faster?

V/R,
Ty

PY sells the aircleaners.If you use buick AFBs you can use the factory fuel lines which are avail aftermarket.As far as the factory carbs,the last carb I sold was $1500 and the restored set before that was $4000.NOT for the weak walet!Tom

WOW
 

and to think of all the old AFB's I junked back when we had a salvage! Guess the modern weber AFB's will have to do.:-ohwell:
As far as which is better, I took this off, 850 dp demon, doug nash, to go to the 2x4's, I love the look and sound (wide open) of the 2x4's. I firmly believe that the 2x4's when tuned and set up right, will go just as quick as a single four barrel on the street. I finally have everything needed to complete my setup, and will get started with the final installation soon.:biggerGri