Brul'e is the keeper of so much data that Google calls him sometimes with questions that they don't have the answers for.
robert
I had an Aussie Cleveland 351 with 4V heads and a single plane Edelbrock Torker manifold when I got the car. Man, it had nothing down low and with long gearing it took its time get up on power.
I played with manifolds and spacers too. Was late 1980s. A dual plane Performer intake with a 1/2" spacer had far better power under the curve, but what surprised me the most was the open spacer. Butt-dyno said significant difference and the car hauled ass for its day, even more so when shortening the final drive ratio. The 4-hole spacer killed it.
The open spacer helped a lot with cylinder distribution, and a secondary effect was it insulated the carb from the engine temperature, keeping the fuel running cooler. They covered that in another episode. Latent heat of vapourisation keeps the intake temps lower. Great times.
tepidtuna
Back in 82 I had an 81 Cutlass with Buick 231 v6. The electric carb was crap. I had a Rochester four barrel off my 63 chevy wagon (that I had previously revived) and I fabbed an adapter to mount the carb to the v6. This adapter was made from a peice of 2×12 wood😁
damarapoledna
Thank you for everything you people do. Love your show. Thank you
rex-zut
Wow! Thank you for confirming what I suspected. I have an Edlbrock Air Gap on my 289 and tried both the 4 hole and the single hole. The single hole felt like it made way more power but all the know it all's in the area told me that's impossible, the 4 hole is what I should be running with a dual plane.
rogerd
Carb spacers are all about laminar flow of gasses, and keeping boundary layers from separation. What happens is that any change of direction, or obstruction causes eddy currents in the flow which are dead spaces that can grow, or shrink based on the geometry used to smooth flow. When these dead areas grow due to poor design they act as an obstruction to total flow by choking off the useable volume through which the air fuel charge must move through the engine. These turbulent eddy currents act as a dead space that blocks flow. The idea of various spacers is they can act to smooth flow, or control flow through reduction of eddy currents by creating clean flow separation at necessary physical features such as the lips of the round holes in the base of the carburetor as well as to cushion the air pulses caused by individual cylinders which cause bounce back to various streams of flow throughout the engine all to enable the greatest possible flow through the engine. Another variable effected by spacers is the vacuum signal reaching the carburetor which changes the air fuel mixture because carburetors read vacuum to regulate fuel. Changes in manifold pressures due to reversion caused by cylinder pulses or passage volumetric inefficiencies caused by bad laminar flow effect the amount of vacuum the carburetor sees in the venturis. These effects are RPM dependent. For example the faster the flow around a corner, or obstruction the larger the volumetric area effected leaving less volumetric area for actual flow. Think of two huge boulders on each side of a river, not only do the rocks physically block the flow of water but they also create eddy currents in the flow itself that block flow. Anywhere water is disturbed, and turbulent it is moving against the total flow making these areas a physical obstruction made of disturbed water not moving in the down stream, or in our case the desired, or most efficient direction for greatest flow. LOL, I can't believe I just wrote all that from my own study of which carb spacer best adapts an 1150 Dominator to the dual plane on my jet boat 460BBF.
PeckerwoodIndustries
We ran a Wilson tappered 2" spacer on my BBC on the dyno. It made 8 HP and 7 tq more than without. Just meant the intake needed more plenum volume for the combo i had.
JerryM-pv
Right on. Like running open spacers seems like it is better for efficiency.
RobertWest-ue
on the street in a car I think the spacer would be beneficial for helping the carb stay cooler
dongiovannetti
I thoroughly enjoyed the video fellahs.
DennisTennyson-yj
BAKELITE USED FOR ELECTRONIC BOARDS IS ALSO PHENOLIC RESIN SIR. Bakelite is a polymer made up of the monomers phenol and formaldehyde. This phenol-formaldehyde resin is a thermosetting polymer. AKA THERMOQUAD CARB MATERIAL. 🤔🤔 Steve B knew that. ❤❤💯💯💯👍👍👍👍👍
JNKYRDGEO
Great episode in showing everyone how spacers work and don't only work by simple install and they absolutely DO NOT work on f.i. engines with pre programmed fuel metering. Even intake spacing is worthless without modification to fuel distribution.
jasonrogers
Dulcich getting in touch with his hippie self😂
dansherwood
A quality air flow equalized with balanced distribution single plane manifold with a tall open plenum will make more power and deliver it consistently better than any other combination with a throttle body injection or carbureted setup, the exception being direct or indirect port injection.
tomconner
You showed the fuel distribution on every setup except the open on the dual plane. I was interested if it tightened it up. That one had the best gain of all the spacers but you didn’t show the data. I’ve seen a few tests where the 2 inch tapered works well on the dual plane upside down. I guess that’s open at the top then a smooth transition. Maybe just due to a certain engine combo, who knows. I do think the best spacer is a one inch with nitrous jets in it. 😁
realazliving
Tell us more about the solid roller lifters on the hydraulic roller cam please.. Thanks,
chuckdubose
With a dual plane add one jet size to primary and secondary on the side of the carb that feeds the part of the manifold with the lower floor, the lower floor will make a weaker vacuum signal to the boosters
hiswordheals
Back in the eay they also made guitar parts out of phenolic resin. Then they realized normal plastic would be fine since they dont see high temps like engines do. Its also known as Bakelite, which is the more popular name.
alexcorona
I have my Dad's '98 Crown Vic. I saw a video some years ago of someone saying the difference in HP between the Crown Vic's and Mustangs with the same engine was a spacer. Thank you for explaining what the these spacers did for carburetors dual plane and single for race engines. This makes sense. I suspect in the Mustang it must be an open hole since the fuel injection was multiport. Still don't get it though in my case. How can it work since all it must do is extend the air intake throat but doesn't change anything else? Must do something.
mrwebber
Electrical boxes and components are are made of fenalic resin, aka "no bake" plastic. It has very good non conductive properties, heat and electrical.
