Rusty - Thanks for the Twin Blade info

I'd bet a dollar that a 1050ish billet dommy would be cleaner, meaner and faster over all cos it was on my Dart and why I sold it to ya..........

I Agree Dom, but for guys that are class/rule limited to a 4150 flange baseplate carb- the twin blades are really the only option to get above 1000ish cfm.
Thats why im gonna get a 4500 for the Duster and leave the twin on the 65 satellite.
I would love to see what you could do with one of the 1400 twin blades now that the new company is making the parts and they are people you " know" rather than what we ,,, well, you know.
Some guys need the flow but, are just rules constrained.

Just thought i would send folks your way.

Couldn't Agree more!.... They idle nice, and that's about it!

BX4 Extreme BLP will flow well over 1400 cfm I heard and has a base plate to meet the 4150 rules.........I will have nothing to do w/the clown that owns the twin blades...........

Dom you know well that there are several people making twiin blade carbs- not that one guy.
Twin blades is not a brand name, its a description just like 4150 or 4500.
Guys you know and respect, claim are as good or better builders than you are the ones making the parts and making them available to "builders only".
You don't want toi build those for people- fine, but no reason to bash the technology because of one company was an ass.

I haven't seen any data as yet showing the Blp unit will flow those numbers, maybe so .
As The Twin Blade was designed by Bo Laws- BLP , when it was actually Bo Laws Products and then updated to cnc and improved metering blocks by Bo Laws son Mike, at BLP - IT Remains a BLP designed carburetor.
One asshat company trying to steal it and screw people over doesn't change the value of the work Bo and Mike Laws have done and Blp remains in business based up Bo and Mike's lifetime of design and manufacturing even though Bo is gone and Mike is doing other things.
Hell, you loved the carb until the company owner turned into an ass.
Thats why i bought it- you bragging on it.
So, did i get sold a piece of crap??

The BX 4 series does look very interesting.
Might order one to play with/test.

Not bashing anyone so no clue on that but you know who I bought your carb from is a blow hard and even stood you up so your call to take it that way but the design is flawed imo for a street car especially like an on and off switch. Just like the QF SV-1's. If I loved the carb I'd still be running it and a Dommy will kill those again imo and MANY others across the board........

Brad: Just disregard my comments man and, see Dom on your carbs needs.
We have had excellent results with our twin blade and, i know the folks manufacturing the parts so, like Dom, i don't have to work with the "other' company.
I was Not aware of the BLP bX4 SERIES EXTREME , i dont think that was available when we realized we needed 1200+ cfm from a single carb, 4150 - that series looks really good, suggest you talk to Dom, he's more current then i am as evidenced by the thread.

Well, again, lots of guys cannot run 4500's and, we don't use ours as a street carb.
I was speaking of Twin Blades, not the person you and i wont fool with - I even went so far as to say: "See Dom".
Why- because you have direct access to the parts from the people making the newest versions of those parts- which is in no way, shape or form related to the company we were dealing with then.
Lastly: you didn't tell me you thought it was such a crapper when you wanted to sell it.

Oh, boy...

I would bet they are doing the same in a 4500......Would love to see what they are up to. If Patrick wasn't such a pain to understand, I would consider one, but for now I will wait and see. I would bet that style booster works really well on Alky or E85...

You never know when the next big thing is going to change the whole playing field. The SV1 I had was starting to come around. I see them on a lot of Nitrous rails...The Mopar seems to like a progressive linkage and four barrels better than one big barrel. I think, if I had a set of Predators, I could have made it work with a bigger signal. Would love to try one now on my Hemi since I have all the other bugs worked out of it.

I find carburetors fascinating. Guys that know carbs really well have a big advantage.....I don't know them that well, and that is why I like working with Thumper, he is great to work with....I had a lot of trouble working with Patrick from Prosystems and was lucky in tuning his carbs and getting them to run. He is bad at explaining stuff to my simpleton self.

I get it Rusty and I do have a new company hitting me up called FST Carbs.......Nice all billet stuff and as far as the twin and me not liking it if you remember I said it was way too "peaky" which I hate so the Dommy's take that away and move the power-band out much nicer and cleaner......

Agreed Dominators are better and i have sent , literally, everyone your way.
This was about trying to get bigger cfm out of 4150 baseplate carbs and, well, sure, there are going to be trade offs in trying to do so.
As stated earlier in the thread- twin blades come up on the boosters really hard and fast- peaky, that has to be accounted for.
Its not as big an issue on a race car as street car, but it still has to be dealt with as it effects 60 ft times.
I was just trying to shoot Brad your way- like a friend would that had one doing good work.
I was speaking of these guys, who have friends of yours there, has nothing to do with they guy we dealt with :

https://pmrdproducts.com/

Have a great day.

That link reminds me of the Kendig carbs form years ago
And the Holley three barrel carbs. before that

It was BLP or Get 'Em garage that was making the twin blade stuff as well? I have some of the Titatn metering blocks waiting to go in to a carb now.

yes, started with Bo Laws, then his son Mike.
Then there was "Get em" - still around>
Now mike has licensed PMD to make the parts to go directly to the Carb building community , which, imho, is really where they belong.
As Dom well pointed out, they are a bit different .
For us, its been mostly dealing with pump shot timing because they get up on the boosters so freaking fast and you can thus be really overly rich on the hit .
Drivability wouldn't be a smooth as a dommy on the street.
We are using Dom's emulsion stack - as sent , rather then the one from Get em.
Afr's stay pretty flat throughout the run after the hit but, it took some experimentation with cams/shooters and will work a bit more on that this season, may try dropping to 30cc pumps from the 50cc as i think a shorter shot will clean up the 60ft afr faster- worth a shot - grin, pun.

PMD , as im told, has made further changes to the metering blocks but we haven't tested any and, honestly, thats something for someone like Dom more them me as he would know how those changes effect everything else , good or bad.
I do know several builders are excited about the metering blocks- couldn't begin to say why.
yes, , i think the Holley 3 barrel is what got Bo Laws to thinking about what could be done with twin blades .

Is there a provision for changing the size of the siphon break in the metering blocks (some have them, others are simply drilled into the angle channel)? Enlarging them "should" delay the point at which the main circuit comes into play, but that's just the first thing that came to mind. Any room to lower the float level w/o causing a lean hesitation? That would have an effect on how quickly the mains comes in, too.

Not sure if there's something in the emulsion stack that can be tweaked to make a similar change w/o messing up the AFR curve.

Also, I've worked w/ Dom on carb stuff in the past, so we're not strangers.

EDIT: I looked a few pics of the Titan-style metering blocks and none of the blocks shown had siphon breaks in the angle channels. Unless there's something radically different about how they function vs a "traditional" Holley-style metering block, I think not having siphon breaks is very likely a contributor to the main circuits coming in too quickly.

i'm not at all unhappy with how fast the boosters come in, i would like to be on booster as fast as possible and pump shot cleaned up as fast as possible .
The faster we are on top of our desired afr's , the faster the car runs .
We are still just a little "long" on being rich from pump shot, not getting to desired afr range until halfway through first gear.
I take data and can see everything on my laptop screen .
Shift recovery is good, carb stays in the pocket on afr really well ( plus/minus 0.5 throughout the run, other than initial hit ) , we just hit 9 to 10 afr on the hit and and i can see it overlap the pump shot a little , want to clean that up, knock a tad off the 60"s.
Being able to see everything on graphs really helps with diagnosis and in seeing why things work that do work and, why things don't work that don't work- grin.
Im really thinking a little more timing at the hit might clean it up as well.

First I've heard of these guys honestly..........