Proposed a filter, carb setup

[Brooks James]

I recently acquire this 71 dual snorkel cleaner

With the square to spread bore pattern adapter, the nitrous plate, and the gaskets
It would not fit with the hood closed

So I got out my trusty bag of adapters, spacers, and gaskets
The blue tape indicates where I will Dremel the hole to a slot.
The phenolic spacer will essentially be a thick gasket

 

[92b]

What is the 4 hole thin plate on the manifold for?

 

[toolmanmike]

Nitrous or a different air cleaner, or no hood. Your choice.

 

[Brooks James]

It is a stamped aluminum "gasket"

 

[Brooks James]

I'm glad you asked, about the plate, the nitrous sprays horizontally, those individual "gasket" holes will probably create turbulence, and also negate the tuned effects of a dual plane manifold
Am I overthinking this ?

 

[MOPARMAGA]

Get rid of the puddle maker at the bottom. That 4 hole thing is a no no. Think about it what's your air and fuel doing while trying to get into you cylinders? Answer being horribly interrupted. Get it out

 

[Brooks James]

Nitrous or a different air cleaner, or no hood. Your choice.

Well, fortunately after massive frigging, it will work

It's amazing how a 30 min job turns into a 4 hr affair

 

[RustyRatRod]

Lose the nitrous is my opinion.

 

[92b]

If you're committed to the spread bore you could scribe the spread bore pattern on the top of the spacer (nitrous plate) and blend it to the square bore. I think the carb will like that better and you can substitute the thick gasket for a thin one for more hood clearance.

 

[mopowers]

Is this thing running yet?

 

[MOPARMAGA]

Lose the nitrous is my opinion.

He wants to go fast in that matter

 

[MOPARMAGA]

Honestly @Brooks James I'm not trying to be a jerk but you need to start over. Your aluminum 4 hole spacer is unnecessary and you have everything possible mismatch going on. Start with one thing at a time and try to vision a finished product. You might have to buy a couple different things to make it work, I wish you luck and hope for your success. Keep us posted

 

[Dartfreak75]

If your gonna run the thermoquad ditch that intake and get a spread bore intake. They are everywhere.

 

[Brooks James]

Honestly @Brooks James I'm not trying to be a jerk but you need to start over. Your aluminum 4 hole spacer is unnecessary and you have everything possible mismatch going on. Start with one thing at a time and try to vision a finished product. You might have to buy a couple different things to make it work, I wish you luck and hope for your success. Keep us posted

I said that I went to my.bag if goodies, spacers, gaskets, etc to come up with a solution
This is the first rendition to figure it out. I've already been advised that air hitting a flat plate (4 hole spacer)
Has shown to be detrimental (on a Dyno) because of turbulence.
I'm having so much fun I don't give a **** how it turns out !
As my grandmother said " If you can't say something nice, don't say anything at all"

I

 

[MOPARMAGA]

I said that I went to my.bag if goodies, spacers, gaskets, etc to come up with a solution
This is the first rendition to figure it out. I've already been advised that air hitting a flat plate (4 hole spacer)
Has shown to be detrimental (on a Dyno) because of turbulence.
I'm having so much fun I don't give a **** how it turns out !
As my grandmother said " If you can't say something nice, don't say anything at all"

I

I didn't say anything mean to you because I know you're trying.
All I was trying to say was don't set yourself up for failure and I'm glad you're having fun, without fun all this would suck especially with mopars because it costs a lot.

 

[Brooks James]

I didn't say anything mean to you because I know you're trying.
All I was trying to say was don't set yourself up for failure and I'm glad you're having fun, without fun all this would suck especially with mopars because it costs a lot.

I'm wide open for suggestions

 

[MOPARMAGA]

I'm wide open for suggestions

First of all how much room do you need to close your hood? 2nd as previously stated The 4 hole spacer, get rid of that and go from there. There are some other suggestions I didn't post that may help you too, a different intake. Is your goal just hood clearance? Nitrous is a must have? Or can you get by and have fun with just a spacer that you can work with spread to square, then see if you can figure out a thin nitrous plate.

 

[TT5.9mag]

Step one, take off thermoquad and all of the adapters.
Step two, put Holley 4150 on top of nitrous plate.
Step three, push button go fast

 

[furrystump]

Probably not what you want to hear, but I would look for a spreadbore intake. You haven’t even addressed the throttle cable issues yet from raising the carb over an inch+ whatever the intake adds. I ran a stock 340 un-silenced air cleaner with a RPM air gap. Needed a dropped base and and it still touched the hood. Had to extend the throttle cable bracket. You very quickly run out of room.

 

[Brooks James]

Probably not what you want to hear, but I would look for a spreadbore intake. You haven’t even addressed the throttle cable issues yet from raising the carb over an inch+ whatever the intake adds. I ran a stock 340 un-silenced air cleaner with a RPM air gap. Needed a dropped base and and it still touched the hood. Had to extend the throttle cable bracket. You very quickly run out of room.

I did look for a spread bore intake.
Limited opinions

Speed master spread bore only good
To 5500
Edelbrock, if I remember, Sticker shock

A friend of mine is a great aluminum welder,

I'm thinking a used Speed Master Chinese Edelbrock knock off
That he modifies for spread bore

at this point I can't get the hood closed with the air filter housing, TQ adapter, nitrous plate, gaskets

No, I'm not ready to cut the hood yet

 

[furrystump]

I’m spinning a stock 68-69 340 intake with the divider cut down to 6700-6800. Only good for numbers are…..suggestions.

 

[92b]

I did look for a spread bore intake.
Limited opinions

Speed master spread bore only good
To 5500
Edelbrock, if I remember, Sticker shock

A friend of mine is a great aluminum welder,

I'm thinking a used Speed Master Chinese Edelbrock knock off
That he modifies for spread bore

at this point I can't get the hood closed with the air filter housing, TQ adapter, nitrous plate, gaskets

No, I'm not ready to cut the hood yet

Will it clear with just the nitrous plate and a thin square bore gasket between the manifold and plate and a thin spread bore gasket between the plate and carb?
If it does see if there is enough room to put the spread bore bolt pattern in the top of the nitrous plate so you could drill and tap for studs or bolts to attach the carb.
Check to see if the nitrous plate has room to countersink socket head screws so they are below the top of the gasket surface of the nos plate.
If all that is doable then you would need to blend the shape of the spread bore into the top of the nos plate to the square flange at the bottom with a diegrinder. Making your nos plate into a spread bore to square flange adapter.
Good luck.

 

[MOPARMAGA]

I did look for a spread bore intake.
Limited opinions

Speed master spread bore only good
To 5500
Edelbrock, if I remember, Sticker shock

A friend of mine is a great aluminum welder,

I'm thinking a used Speed Master Chinese Edelbrock knock off
That he modifies for spread bore

at this point I can't get the hood closed with the air filter housing, TQ adapter, nitrous plate, gaskets

No, I'm not ready to cut the hood yet

You're friend could hook you up with individual nozzles for your nitrous system in the runners. That gets rid of that spacer.
Run a 4150 carb , that gets rid of the other spacer.
Also ask your buddy to Make that factory air cleaner housing into a drop base. After you figure out your linkage and throttle cable.
Hot rodding with stuff you want that doesn't work usually requires alot of modifications and fabrication.
making it work ...that's when you're hot rodding.
I know this from experience as I love doing things that people doubt can be done.
If you lived next door I'd gladly help you out

 

[RustyRatRod]

I did look for a spread bore intake.
Limited opinions

Speed master spread bore only good
To 5500
Edelbrock, if I remember, Sticker shock

A friend of mine is a great aluminum welder,

I'm thinking a used Speed Master Chinese Edelbrock knock off
That he modifies for spread bore

at this point I can't get the hood closed with the air filter housing, TQ adapter, nitrous plate, gaskets

No, I'm not ready to cut the hood yet

Holley Street Dominator is an excellent choice and you can get them cheap, because everyone thinks since they're a single plane they suck on the bottom end and that's as far from the truth as you can get.

 

[Brooks James]

Ok, I think I have solved the problem
The blue tape indicates where I will have a slot machined to the edge of the phenolic gasket, all 4 corners on both stacked gaskets. Which provides just enough clearance for the rear butterflies.
The anodized plate , I will use as a guide to drill square bolt pattern holes on the base of the carb. There is enough meat to do so.
I mocked it up with the air cleaner, plenty of clearance now