427 SBF

89 Fox 427 said:
Annular vs down leg anyone?
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Mark Whitener (sp?) is my favorite carb guru and he says annular all the way.
So I bought a downleg body for my built carb... :p

I didn't want the extra restriction, but I am probably wrong...

I think this is the correct site of his, they changed at some point and I haven't been there in a while:

Racing Fuel Systems • Index page

racingfuelsystems.com
 
Patriot Racer said:
I think he said downleg always makes more power. This test says otherwise. Mine uses annular boosters, so this sparked my interest.
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That test cheats a bit though, the annular carb is bigger, even though the two are rated the same.

I'd say that's the best combination, a slightly bigger carb with annular boosters.

The reason I don't go with annulars is I've read they're harder to tune.
I like to keep things as simple as possible because I'm not what you'd call a stellar tuner...

I don't know if Mark Whitener still does it, but you used to be able to send him a main body and he would install custom made annulars that he has worked out to flow well and have a great signal.
I've considered doing that, maybe if I get my car sorted out I'll try it.
 
89 Fox 427 said:
Something else he kind of mentioned in passing is that they've tried drilling them asymmetrically, and could then "aim" them at the runners that had lean cylinders.
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I've never heard of that, it's pretty cool.
 
Steve439 said:
That test cheats a bit though, the annular carb is bigger, even though the two are rated the same.

I'd say that's the best combination, a slightly bigger carb with annular boosters.

The reason I don't go with annulars is I've read they're harder to tune.
I like to keep things as simple as possible because I'm not what you'd call a stellar tuner...

I don't know if Mark Whitener still does it, but you used to be able to send him a main body and he would install custom made annulars that he has worked out to flow well and have a great signal.
I've considered doing that, maybe if I get my car sorted out I'll try it.
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It’s funny how some of the well knowns in the industry have beef. I mentioned going to a 2 circuit carb to BLP based on something I read from Whitener. BLP said he’s a dyno racer and a 2 circuit is a lazy man’s carburetor lol

I would love to test a 2 circuit dominator and see if there is a difference, but I doubt I’ll get the chance.
 
Patriot Racer said:
It’s funny how some of the well knowns in the industry have beef. I mentioned going to a 2 circuit carb to BLP based on something I read from Whitener. BLP said he’s a dyno racer and a 2 circuit is a lazy man’s carburetor lol

I would love to test a 2 circuit dominator and see if there is a difference, but I doubt I’ll get the chance.
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That's kind of weird, I wonder if something happened.
One of the guys from BLP was a regular poster on Mark's forum and used to sell stuff (IIRC at good prices).

I think @itey is a big fan of 2 circuit Dominators, it would be interesting to hear his input.
 
Steve439 said:
That's kind of weird, I wonder if something happened.
One of the guys from BLP was a regular poster on Mark's forum and used to sell stuff (IIRC at good prices).

I think @itey is a big fan of 2 circuit Dominators, it would be interesting to hear his input.
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Yes, Itey has mentioned it before. What I recently found out is that BLP’s metering blocks are different compared to most. I was watching a video about converting to 2 circuit and I noticed that on BLP’s carb the intermediate circuit is the outside air bleed. I suppose I could buy a different set of metering block, but i don’t want to drill and tap those tiny holes on the carb. Afraid I’d f up and then be down.

There are those that say a 3 circuit is the cat’s meow if you can dial it in.
 
Since I have an old fox body this thread interests me a bit.
How fast do you want to go with this cruiser and be a weekend driver??
 

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makinchips said:
Since I have an old fox body this thread interests me a bit.
How fast do you want to go with this cruiser and be a weekend driver??
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If I can slap a set of slicks on it and bang my way into 10.5 @ about 3000lb that would be great. My car isn't gutted though and it's a GT so I really don't know what it's going to weigh.
 
89 Fox 427 said:
If I can slap a set of slicks on it and bang my way into 10.5 @ about 3000lb that would be great. My car isn't gutted though and it's a GT so I really don't know what it's going to weigh.
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I'm at 3100 lbs without me (1983 gt hatchback with toploader), 408 Cleveland dynoed 583hp, probably around 600hp with oil pan and intake change. Only ran 11.7 with shitty launch but at 125.4 mph, which puts it in the range yer after.
It takes a lot of hp to make up for a poor 60'
 
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