Blaster 61x differences between single 44 and dual 38 carbs

[nickf74]

I'm nearing the end of my B1 build and am looking at carb options. I was planning on a single 44 and am wondering how much performance gain I would get if I went with a dual card setup. I know the 62T cases were designed for the dual carbs and the 61x for single, but would it be worth it to set up a dual on a 61x? My setup now is as follows:

61x cases
stock 701 cylinder and pistons
ADA girdled head 35cc domes
factory limited exhaust
carbon tech reeds
solas mag pump
10/16 hooker prop

What would be the best option for a carb setup?

 

[IS0LD0UT]

Prob a 46 would be best.

 

[tor*p*do]

i really love the 46 on my 61x/61x
works well on the oem manifold

 

[chriselmore_1]

I ran a taper bored 46 on my old 61x and it ripped! Did a 62t case swap and the 46 hit harder then the 38s

 

[nickf74]

So, is there a big difference between the bn44 and bn46? It would make sense having a bigger bore carb with the mods. Also, do you have similar mods? and would jetting be about the same as for a 44?

 

[BruceSki]

I ran a set of dual 38's on my 61X blaster with a protec manifold. I thought it ran pretty well and did better than the single 44.

I'm always a fan of duals over a single. They will out perform a single any day when properly tuned.

However, tuning a single carb is much easier.

 

[Matt_E]

I ran a set of dual 38's on my blaster with a protec manifold. I thought it ran pretty well and did better than the single 44.

I'm always a fan of duals over a single. They will out perform a single any day when properly tuned.

However, tuning a single carb is much easier.

Yah, but how many times do you tune it?

 

[motoman96]

I'm running dual blackjack 44's on my stroker, an it's a 61x motor...

 

[BruceSki]

Pulling dual carbs is more of a pain during that tuning process is more what I am trying to say.

Sometimes they come on and off 5 times till its dialed in.

 

[Matt_E]

Ok, I hear that. It can be a pain in the ass to keep pulling carbs to change jets. But once you got it dialed, it should be good.

 

[BruceSki]

I figured U were breaking my chops on that one.

I agree though once the tuning is done maintenance is the same as a single. Pour gas in the tank and run it!!!

 

[nickf74]

Anyone run a single 46 and then dual 38? Is there a big difference between them? Also, is there a difference in fuel consumption?

 

[BruceSki]

the dual 38's sipped fuel. Almost as good as a single 44.

I was running MSD enhancer, lightened stock flywheel, and pro-tec pipe. Really basic setup but hit well once i put the duallies on there.

 

[Scraggly]

ive only had one full 61x engine, but going from a stock 44 to a blackjack 46 was a huge gain in throttle response and overall power and i used the stock intake and reeds

 

[motoman96]

I went from a single powerbomb 48 on a 61x setup to dual 44's on same motor, way less ride time on the duals.

 

[Matt_E]

Yah, but how much ride time do you really need Kenny? 10 mins?

 

[nickf74]

Ya, i was planning on sticking with a single so I got the carbon tech reeds. So, it would probably be best to go with a single 46 or maybe 48. If I were to change to duals, I would have to change to a different intake manifold and reeds right?

 

[motoman96]

This was my fx1 motor, with the 3.8 gal tank I could run up an down the river for about an hour. The stroker with the BJ's will drink 2.1 gallons in about 15-20 min.lol

 

[BruceSki]

No, on the 61x motor you just change the top plate of the intake manifold to go from single to dual carb.

It is a two piece design with the reeds on the bottom plate.

 

[motoman96]

Ya, i was planning on sticking with a single so I got the carbon tech reeds. So, it would probably be best to go with a single 46 or maybe 48. If I were to change to duals, I would have to change to a different intake manifold and reeds right?

Just a different manifold