How much hp are you making with a 4150 base carb?
 

It seems that 700hp in 565-588ci motors is the fence for high flowing (1000cfm+) 4150 carbs before venturing into 4500 Dominator territory.

I'm just curious if anyone has some good dyno numbers running a 4150 base carbs of the HP1000 variety. It seems to be agreed that the 4150 base carbs are more fuel efficient and user friendly in a pleasure/performance application than their counterpart Doms. The Holley chart says the HP1000/4150 is the selection for 600ci/6000rpm motors.

So why does everyone like the Dominators? It seems that giving up 10-15hp on top is a small price to pay for increased efficiency and mannerism across the board. :food-smiley-007:

Normally I'm an EFI guy so this is somewhat new to me.
I have the opportunity to go either way here (4150 or 4500) with what I have so I'm just trying to learn and make the bst choice.

Thanks,
Dave

700 + h/p is not a problem for 4150's as most of the marine engines are on the low side when it comes to rpm, and yes the circuts are better for marine use as well...Rob

http://www.pro-system.com/

VERY godd carb guy.

My dominator's ran better than my 4150's

They make a 3 circuit dom

Yes, I have spoke with Patrick...
Thanks

Thanks Strip...
I'm a bit confused on the 2 vs 3 circuit. All previous discussion (and Bob Teague) think the 2 circuit is the only way to go???

Dave

you do NOT want a 3 circut dominator, I got one for my top sportsman car after talking to holley, worked like crap..called back a couple of times before we figured out that we were not leaving the starting line on the floor on the trans brake ! only at 3000, any way a 3 circut carb is only designed for drag racing with a trans brake leaving flat on the floor...the other circut makes up for the lack of accel pump which is passed by at that point...I had to convert mine to a 2 circut and works great now...lots of mis conception on these carbs...Rob

I think the majority of newer Dominators are 3 circuit. Nickerson blocked off of one of the three circuits on my Dom.

I made 900HP NA pump gas with 4150 style carbs....of course (2) helped....:D:drink:

they make both 2 and 3 circut ones, many different applications

We are a Pro-System Dealer if you would like you can order through us.
Thanks Vince

You may have to do a search, but was it Laz Mesa who posted that he uses a Holley 800cfm carb on his marine natually aspirated 555cid engines??? These engines have ported aluminum heads, 9.5comp ratio, hyd roller cam that he claims dyno tested to about 740hp or so @5800rpm. If I am wrong then someone please correct me. You can call Laz to find out for sure. :)

I have seen 750 at 5000+- with a 950 4150 flange carb on a 582 with a pretty mild cam.

I use DC Carbs to just build what I am looking for in a carb instead of buying a holley and modifying it.

Used to be DaVinci carbs back in the day. Pretty knowedgable carb guy. I have seen his stuff pick up 50HP on the dyno from an off the shelf holley. Of course this was big displacement engine all ready at 650HP.