carbuerator time
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Fleet Mechanic
Joined: Jul 2013
Posts: 1,997
Likes: 237
From: NE Ohio
carbuerator time
My 4180 on the 86 is springing leaks, found a 2nd one so it's time to look for a new carb.
Is anyone running a road demon and how do you like it? Is it "easy" to fiddle with?
I'm debating between a 4160 and the RD.
I'm not sure how to quantify "easy" but an example is I'm not going with the street demon because from my understanding.
the carb needs to come off since the screws holding the top plate are on the bottom.
If the RD is like working on a 4160/4180 I'm good with that I'm assuming it is.
Figured I'd see if anyone is running one for a real life feedback.
I like what I have read about the road demons but I'm not sold on the extra cost yet.
Is anyone running a road demon and how do you like it? Is it "easy" to fiddle with?
I'm debating between a 4160 and the RD.
I'm not sure how to quantify "easy" but an example is I'm not going with the street demon because from my understanding.
the carb needs to come off since the screws holding the top plate are on the bottom.
If the RD is like working on a 4160/4180 I'm good with that I'm assuming it is.
Figured I'd see if anyone is running one for a real life feedback.
I like what I have read about the road demons but I'm not sold on the extra cost yet.
Lead Driver
Joined: Jun 2013
Posts: 5,653
Likes: 1,157
From: Tolland, CT
Yesterday I watched a show (engine masters) where they found the Summit carburetor won out over the Demon and the Edelbrock AVS style. The Summit carb was also the cheapest.
https://www.summitracing.com/search/...pe/carburetors
https://www.summitracing.com/search/...pe/carburetors
Laughing Gas
Joined: Nov 2013
Posts: 1,022
Likes: 79
From: A dirty little town in OR
Summit carbs are pretty great. I've always preferred the Edelbrock style over a Holley setup and the Summit carbs owe a lot to the Edelbrock platform.
With that said, l have a 650cfm Street Demon that l bought for my old FE360 truck but never mounted.. l don't have it listed for sale (yet), but it seems pretty unlikely that I'll be using it on my newer 4.9. .
You can PM for details if you think it's something you might be interested in.
With that said, l have a 650cfm Street Demon that l bought for my old FE360 truck but never mounted.. l don't have it listed for sale (yet), but it seems pretty unlikely that I'll be using it on my newer 4.9. .
You can PM for details if you think it's something you might be interested in.
Logistics Pro
Joined: Jun 2017
Posts: 3,951
Likes: 509
From: Edmond, OK
I've never used a Road Demon. My understanding is that they are pretty high performance carburetors.
I have a vaccuum secondary Summit 750 cm carburetor on my 71 Olds 98. They are clones of the old Holley 4010. It works great and is definitely streetable. After setting the timing I adjusted the idle mixture screws with a vacuum gauge and it runs like a champ.
What engine does the OP have in his truck? If it's a 4.9l I6 do they make a square bore 4 barrel adapter for the intake manifold?
I have a vaccuum secondary Summit 750 cm carburetor on my 71 Olds 98. They are clones of the old Holley 4010. It works great and is definitely streetable. After setting the timing I adjusted the idle mixture screws with a vacuum gauge and it runs like a champ.
What engine does the OP have in his truck? If it's a 4.9l I6 do they make a square bore 4 barrel adapter for the intake manifold?
Laughing Gas
Joined: Nov 2013
Posts: 1,022
Likes: 79
From: A dirty little town in OR
I've never used a Road Demon. My understanding is that they are pretty high performance carburetors.
I have a vaccuum secondary Summit 750 cm carburetor on my 71 Olds 98. They are clones of the old Holley 4010. It works great and is definitely streetable. After setting the timing I adjusted the idle mixture screws with a vacuum gauge and it runs like a champ.
What engine does the OP have in his truck? If it's a 4.9l I6 do they make a square bore 4 barrel adapter for the intake manifold?
I have a vaccuum secondary Summit 750 cm carburetor on my 71 Olds 98. They are clones of the old Holley 4010. It works great and is definitely streetable. After setting the timing I adjusted the idle mixture screws with a vacuum gauge and it runs like a champ.
What engine does the OP have in his truck? If it's a 4.9l I6 do they make a square bore 4 barrel adapter for the intake manifold?
I don't know about an adapter, I've never seen one. I'd assume it would have to be pretty tall. Maybe tall enough to cause clearance issues.
There are 2 and 4 bbl intakes for the 4.9. Theyre pretty pricy though, usually around $400. I'd like to have one if for no other reason than l'm more familiar with 4 bbl carbs than the 1 bbl l currently have.
Thread Starter
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Fleet Mechanic
Joined: Jul 2013
Posts: 1,997
Likes: 237
From: NE Ohio
I've never used a Road Demon. My understanding is that they are pretty high performance carburetors.
I have a vaccuum secondary Summit 750 cm carburetor on my 71 Olds 98. They are clones of the old Holley 4010. It works great and is definitely streetable. After setting the timing I adjusted the idle mixture screws with a vacuum gauge and it runs like a champ.
What engine does the OP have in his truck? If it's a 4.9l I6 do they make a square bore 4 barrel adapter for the intake manifold?
I have a vaccuum secondary Summit 750 cm carburetor on my 71 Olds 98. They are clones of the old Holley 4010. It works great and is definitely streetable. After setting the timing I adjusted the idle mixture screws with a vacuum gauge and it runs like a champ.
What engine does the OP have in his truck? If it's a 4.9l I6 do they make a square bore 4 barrel adapter for the intake manifold?
I do like what I have read with the summit carbs and yes they are very reasonable. Looks like they are easy to work with on the vehicle as well.
Thats my only concern with the road demon.
Logistics Pro
Joined: Jun 2017
Posts: 3,951
Likes: 509
From: Edmond, OK
DOH! Right you are. 
A 750 cfm Summit carb would work great on your 460 as long as it has a square bore intake.
A 750 cfm Summit carb would work great on your 460 as long as it has a square bore intake.
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Fleet Mechanic
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From: NE Ohio
Which is nice to not have to replace the intake as well.
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Lead Driver
Joined: Jun 2013
Posts: 5,653
Likes: 1,157
From: Tolland, CT
Even if it didn't match your intake manifold, I'm sure they still make adaptor plates that would make it work. I know they did back in the 1970's.
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Fleet Mechanic
Joined: Jul 2013
Posts: 1,997
Likes: 237
From: NE Ohio
they still do.
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Fleet Mechanic
Joined: Jul 2013
Posts: 1,997
Likes: 237
From: NE Ohio
Well hit a stumbling block on the summit carb. I really liked the price hah.
But the one that comes with the ford kickdown lever doesn't have any kind of booster, the other one has a downleg but it is not recommended for automatics since there is no kickdown supplied and
I didn't see one on summits site. I may have overlooked it as well.
Can kickdown levers interchange? Possibly swap the one on the 4180 over? Seems like that would be too easy but maybe being both holley's idk, my carb experience has been fairly superficial up
to this point.
But the one that comes with the ford kickdown lever doesn't have any kind of booster, the other one has a downleg but it is not recommended for automatics since there is no kickdown supplied and
I didn't see one on summits site. I may have overlooked it as well.
Can kickdown levers interchange? Possibly swap the one on the 4180 over? Seems like that would be too easy but maybe being both holley's idk, my carb experience has been fairly superficial up
to this point.
Lead Driver
Joined: Jun 2013
Posts: 5,653
Likes: 1,157
From: Tolland, CT
This might be the link to the episode where they tested the three carb's. I thought they mentioned something about kick down linkage...
https://www.google.com/imgres?imgurl...MygEegUIARCgAQ
Did you talk to someone at Summit, they are very helpful.
https://www.google.com/imgres?imgurl...MygEegUIARCgAQ
Did you talk to someone at Summit, they are very helpful.
Logistics Pro
Joined: Jun 2017
Posts: 3,951
Likes: 509
From: Edmond, OK
x2
Here are the C6 kickdown cables and brackets. The techs at Summit should be able to help you order the right parts.
https://www.summitracing.com/search/...tor%20kickdown
Here are the C6 kickdown cables and brackets. The techs at Summit should be able to help you order the right parts.
https://www.summitracing.com/search/...tor%20kickdown
Lead Driver
Joined: Jun 2013
Posts: 5,653
Likes: 1,157
From: Tolland, CT
Wow, I find it much more better (LOL) to speak to someone who knows the parts they have. I just called Summit and spoke to someone before I ordered the 50,000BTU Mr Heater and items for my new garage. There was no way I would order that kind of expense without talking to a real person. But, I'm almost 67y/o.
Even back when we were building our race car, I taught my son to call and speak to the experts. Example, he spent 2 hours on a phone call to the west coast talking to a shock Engineer and learning about suspension set up. That was back in 2006.
Even back when we were building our race car, I taught my son to call and speak to the experts. Example, he spent 2 hours on a phone call to the west coast talking to a shock Engineer and learning about suspension set up. That was back in 2006.