i know this will probably slow my car down , but its something i've got to try. i'm goig to be installing a tunnel ram on my car, weiand intake and dual holley 450's- mechanicals. any body running one of these? how far out of the hood do the carbs stick out? i have a 2" cowl hood now.

 

Yes it will slow your car down. Tunnel rams look good but will start to work above 4000 rpm. You'll also kill your gas mileage.

Your 2" cowl hood will have to go. The tunnel ram should stick both carbs on the outside of the hood.

Lots of luck getting it all hooked up and tuned. Although they look impressive, you're better off running a Victor Junior intake and one large carb.

 

i guess the look is the appeal.i'm running a victor jr. intake and a 750 double pumper now. the cost of replacing my rearend has got me thinking of other directions to take the car.are the tuning problems with the tunnel ram setup really that bad?

 

They can be pretty tough....

Look at the firing order, that should give you a clue. You have the front 4 cyls firing 2-1-(8)-4-3, and the back 4 firing 8-(4)-(3)-6-5-7. If they drew through the 2 carbs more steadily, with cyls evenly spaced throughout the order, it would be alot easier. But they aren't so you end up with fuel pooling out, different cyls that run way richer or leaner than others, etc. The ones that have no plenum (each runner goes to its own carb venturi) are generally easier to tune but require special carbs, with the "secondaries" being the same as primaries; you end up essentially with 8 carbs made into 2 castings with 4 fuel bowls.