Dang! ALLSTATE CARBURETOR! I used to live close to that shop. There very good at what they do.

Your viewers will come out on top, with the knowlege that you provide from your channel.

When I was with Jenkins in '71 his tried and true setup was two 660's with the last lower inch of the main body opened up for 850 baseplates . Holley , Weiand , Bauman , Mopar and one or two Hemi teams had sorted the Dominators about a year and a half earlier , and they won 90 plus percent of the major Pro Stock races in '71 . So of course Holley wanted Dominators on the top Chevy , which was a 430 inch big block , and we worked very hard to comply . When we finally got the manifold and big carbs sorted , we stayed right where we were with the 660's , and didn't close the gap on the Hemis which was about a tenth of a second . Soooo, we built a small block Vega ,,, ! ,,, Btw , of course the little carbs had a much bigger plenum ,,, ! ,, ,,, I rated the 660's at a nominal 700 CFM ,,, and we initially used the 1050 CFM Dominators , but had the 1150's , and maybe used them first . It's only been 53 years .

When I get a new carb, it will be a 750 Edelbrock VRS. It has the bells and whistles that Holley does not, right out of the box. Annular venturi is the ticket.

This will be interesting,Andy! I'm not familiar with the Dominators, so it's school time for me!

Ive been using widebands for the last 12 years never will tune a car without them

“Why use a dominator? Because they look cool”. Best line ever. Great tech tip for the O2 sensors. Looking forward to the carb tuning !

Great test can’t wait thanks

Wideband is indeed a game changer when it comes to tuning. I'm slowly gaining on mine LOL. I'll be following this one closely that's for sure.

Knowing that Allstate build some of the best carbs out there, and you got couple custom carbs there, I am going with there 750s. But I do think for all out HP on the dyno it might be the Dominators. This should be good. I think I need to call Allstate after seeing those Beauties coming out of the box . They will look Awesome on Mixed Up Boss for sure.

Kool i cant wait till the next one i have a brand new 750 Dominator and have been reluctant to try it My 422 cube small block Mopar made 535 hp with a 750 xp i am going to try the Dominator after your videos

The cfm being the same the differance in boosters annular vs steped down leg is a coin toss

You do some pretty good videos my brother.. I learn a lot from you let me say this I've been through about 6 carburetors to run right. So I went with a fitech efi my engine is running better but I am still in the process of still tuning it.

Awesome idea Andy.I'm betting that the 750's will perform better at the track.They may or may not make the most HP on the dyno.The venturi made for 750 cfm will respond better to real world situations imo.I can't wait to see the tests.

looking forward to your upcoming vids.

I think the annular boosters in the Dominators will atomize more finely than the downleg boosters in the 4150, given the same signal. Because of that, response might be crisp with the Dominator. However, the finely atomized mixture will take more room, physically, in the intake tract. And that will result in slightly lower VE at wide open throttle for the Dominators compared to the 4150s. That could give the edge to the 4150s at the track and on the dyno, despite the Dominators having better drivability. Just a crazy thought, I could be totally wrong.

Very cool, one of the “Wizards Of Tunnel Ram Flow Technology.” Love this, because you and David Visard, are guru’s of the velocities needed for proper fuel throttling and idle for The Tunnel Ram Intake. So cool and absolutely when to use oxygen sensors? When you are so dam good that it gets down to that kind-of fine tuning. And absolutely yes on carburetors. So cool, I watch youAndy and UTG David Visard and a few others. You guys are so cool😊

I can’t wait. I’m decent at rebuilding and turning quadrajets and Holley. Can’t wait for you to help me level up my carb skills. I can only learn so much from reading it helps to have advice on it. Saying things like I’m using a vacuum gauge to tune my carb sounds like crazy talk at local parts house.

Really looking forward to seeing this Andy. Will be interesting. Overall power I think the Dominators will be on top :) I love my Dominators , I found the 2 circuit 1050 best for street

I agree with your thinking, without a wide band O2 sensor you are working blind. Very difficult to set up a carb for optimum results by seat of the pants testing. Those nw HP 4150s are dead sexy BTW... very nice. Looking forward to it.

Use of o2 sensors will definitely help dial in fuel to air ratio. Most shops used to have a machine they could hook to car all analog with o2 sensor at tailpipe dwell meter Anda few other things fer routine tune up

Agree 100%. 02 sensors are the only way to really tune a carb. You can get close with the seat of the pants evaluations, but the sensors really let you know where you should lean out or richen up the individual the circuits. I'm interested to see the results. My guess, they will be within about 10hp. But the dominator will get the edge.

Thanks, Andy. Always good info. Dominators, of course. 😅

I believe this is going to be a very revealing project. I'll be tuned in on it.

I’m mostly a GM guy, but love your truck dude.

I think the Dominator will have better cylinder to cylinder distribution, so a little more power, but the 4150 will have a better signal to the boosters, so maybe a better transition when the throttle opens and launch/drivability gain. The 4150 750 has a very good Venturi design, which is hard to beat and I can’t see a restrictor in the booster being better.

I don't mean to be smart or anything, but I think your intake is costing you a consideral power loss.look at the Gain the gasket mismatch did. Thats telling me the air is hauling but in the intake.

Is there a reason why you haven't hooked up your crankcase breathers to your header collectors yet?

Dominators for the win!

Great video! I just got my 395 sbf from the machine shop where it made a little over 600 hp. I accidentally got a dominator intake manifold. Can a dominator work on a drag/drive foxbody? This is my first carbureted set up

I'm going with the dominator's coming out on top!

I’d be curious to see a change in vacuum wot between the 2 sets of carbs.

the tight spacing of the intake runners on that tunnel ram makes me think 4150 style will be better? I guess we will find out! gong to be a cool test Andy!

Great vidja Andy aawwwooo 🤙🏼🇺🇸

Im in the process of doing some interesting reshaping to the top of a 750 cfm holley. I got a video up on my channel id love to hear your thoughts/feedback

I'd have to go with the Dominator. The annular boosters allow leaner mixtures for street driving. I'm going to guess not much HP difference due to the intake limiting total flow.

I have a wide band on my car and only use it on the street, on the track the carb is completely set up different. I would like to see a single 850 on that.

4500' flow rating are at 1" H20 where 4150 ratings are at 1.5" H20. This means Dominators flow way more at same pressure drop.. Not surprising that peak power is higher with Dominators.

For your set up two 4150s are the way to go

Do ya have the Caspermatic in her now Andy?

Andy, I believe, the modern double pumpers will out perform the dominators. Due to, the modern technology in today's carburetors.

Alstate carburaters ?

I am guessing dominator for max power due to it having fuel paths for a 1050, but the 4150 will have better street manners as they had more Holley development money spent there.

Be careful with ebay o2 sensors there are a lot of counterfeit ones advertised as genuine Bosch.

When it come to power do you think the carburetors better than the EFI

I think the 4150's will come out on top with drivability and be very close on power. On a engine dyno the dominators would make a little more power.

Dominator on the dyno 4150's on the track

I'm voting 4150 carb as the winner for street use. But I really don't know. Both are sweet setups

I think the dominator wins on all out HP but the 4150 will drive better and maybe even get better mpg from better atomization.

When my O2 sensor dies from C16 I burn the lead off with a torch.

With a spicy engine the carb could be a restriction in and of itself.. Or too much will affect accel.... Find the sweet spot..

? Are you changing the top of the intake to 4150 or adapters.

I bet many engines have been laid to rest from tuning carbs without an o2..

I'm guessing the 4150s will give you a better 60 foot.

Those tests will tell you nothing about the flow capabilities of the carbs- the engine will only pull in as much as it needs. Do an actual flow test too... both are probably plenty big enough for that engine? Whichever can deliver the best fuel curve will make the best power curve I would think

Dominator flow more.But your motor may like 4150 better.

allstate 750

4500 are junk