And it’s annular… should I get one like this also?
Tunnel ram or no tunnel ram...
- Thread starter Miszny
- Start date
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The annular boosters took rat bastid a little bit of work on a lathe because blp haven't made banjos specifically for their main body .
Holley's main bodies use a square notch, blp has a round locator hole for the banjo, so it just needs to be milled a bit to get the banjo far enough in to be swedged in.
Blp will install them for you for an extra charge.
I think all carb builders would recommend annulars by now, they are far superior to a down leg, I can't even imagine how efficient they'd be on a tunnel ram,
I'm thinking you'd have a nice fuel fog.
But on a 750 main body I think it may hurt flow a bit but have a very good signal on those boosters
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Rat Bastid
Dunamis Metron
BLP claims 1000cfm flow on 750 body so I’m not too worried about flow. I always prefer annular, I got my 1 annular double pumper about 10 years ago and everything I had was this way since. Better fuel atomization.
I was also looking at QuickFuel 750 annular carbs to tweak them to run on tunnel ram but it’s not the cheapest option…
Yeah, that's not a bad carb either. The couple I've seen were really close out of the box, the annular would have been better though for both engine.
I would go for it.
M1 single plane?
B block correct?
Who’s Tunnel Ram?
RB Tunnel Ram?
Tell me (us) about the twin carbs.
Thanks Kim.
Yes M1 single. 440 size. 400 B block. Weiand T ram RB size. 660 Center squirters with metering plates on the rear also. My 470 used a RB intake because I had Stage 6 Mopar heads on it. Kim
Rat Bastid
Dunamis Metron
You can make these work if you can get them cheaper. You just need to measure EVERYTHING a and then adjust it accordingly.
Those will work just fine.
Tunnel Ram. Do it.
Cheapsunglasses
In rust we trust!
It’s my understanding, and I’m by no means anything close to an expert. When you are running multiple carbs, they aren’t individual carbs, they have to act as 1 carb. And there’s also a reduction in cfm, it’s not a full 1500cfm (there’s some science I don’t understand there.) That’s why the idle circuit has to be reduced by half, and I believe there’s other circuitry that has to be reduced too.
Rat Bastid
Dunamis Metron
Rat Bastid
Dunamis Metron
Cheapsunglasses
In rust we trust!
I meant restrict, I’m trying to find the video I saw talking about this.
Rat Bastid
Dunamis Metron
Cheapsunglasses
In rust we trust!
It was him or Chris Birdsong. Tony can be a nut case, but sometimes he has some good info
I asked them this question. I will get main body with no boosters if I have no choice and retrofit annular booster banjos.
Cheapsunglasses
In rust we trust!
Ok @Rat Bastid, it wasn’t uncle Tony or Chris, it was this guy. And I’ll admit I made a mistake and slightly misinterpreted it.
Rat Bastid
Dunamis Metron
Rat Bastid
Dunamis Metron
That’s Andy Wood. He has a lot of great stuff on his YouTube channel. It’s worth watching.
What I think this is about is, if you put two 1500 cfm carbs, they won’t work to there full capacity as if there was only one. This is a reduction in how much is pulled through the carb. Not the capacity of the carb being reduced or the efficiency. The engine likes the extra available air and fuel flow of the twin carbs over just the single carb. The twin carbs make the engine more power with what’s available in overall A&F flow and lack of restriction.
I have no idea about the “Half the idle circuit” needs to be done thing.
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