Fuel System Tech Article. Project Nova — Edelbrock E-Street EFI Cold starts no longer involve tricky stabs of the gas pedal to keep the edelnrock running—even though the old carb had an electric choke. You May Also Like. Mating the E-Street system to our hp ci small-block Chevy was straightforward. In this episode, Project Chevelle takes a big step in its muscle car transformation.
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In fact, for many years Mopar owners had to deal with sluggish support when it came to high-quality performance parts for their cars and trucks, while off-brand owners enjoyed a plethora of support for their cars and engines. Times have changed, however, and now owners of Mopar big-block, small-block, and Hemi powered vehicles can purchase an abundance of performance parts to enhance the performance of their cars and trucks.
Edelbrock was the first company to provide economically priced, great performing aluminum cylinder heads for Chrysler big-blocks and small-blocks, and we see more cars at events and races sporting Edelbrock Performer RPM heads than any other type of aftermarket head. Edelbrock also has a full line of intake manifolds, carburetors, and other performance goodies for Mopar engines, all of which can improve the power, performance, and looks of your ride.
We know from our testing that the Performer RPM and Victor big-block heads can help achieve great power, so when Edelbrock introduced their E-Street line of heads for the big-block, we wanted to be the first to test them.
Our stock, low-compression was low on power when we started, but these modifications helped us achieve respectable power numbers. Other than chamber volume, the specs for the E-Street heads are identical, with cc intake ports and 70cc exhaust ports, and swirl-polished stainless steel valves. Intake valves are 2. Edelbrock installs their PN Sure-Seat valve springs on these cylinder heads, and the heads can handle camshafts with lifts up to.
Two-ring positive control oil seals are installed on the valve stems, and all of the provisions for the intake manifold, exhaust headers, rocker arms, and accessories are in the factory locations, for a true bolt-on installation.
Additional benefits of the E-Street heads are dry, Heli-coiled exhaust bolt provisions, and spark plug provisions that are angled 15 degrees for more efficient combustion. We have already made improvements to our engine in previous articles, installing a Comp hydraulic flat-tappet camshaft and lifters, Comp double-roller timing chain and gears, Edelbrock Performer RPM intake, cfm Edelbrock Performer series carburetor, and tti headers and exhaust.
The details of these installations can be found in previous issues of Mopar Muscle, and netted improvements of some 33 horsepower and 27 lb-ft of torque at the rear wheels. This is up substantially from our baseline of horsepower and lb-ft of torque, but we knew we could make more improvement with a cylinder head swap. Additionally, the smaller 75 cc combustion chamber will increase the compression of our.
The E-Street heads will also offer flow improvements over our castings. The heads on our have a little bit of match-porting and bowl work done, but the E-Street heads provide better flow and an improved combustion chamber, equaling enhanced performance, right out of the box.
In applications with a larger than stock camshaft, like ours, Edelbrock recommends installing adjustable rocker arms rather than using the factory, non-adjustable units. Comp Cams Pro-Magnum rocker arms are a great choice, offering a lot of benefit for the cost, so we ordered a set of their PN roller rocker arms for our big-block. The E-Street heads install just like factory cylinder heads, and the head bolts are installed and tightened in the standard sequence to a final torque of 70 lb-ft.
Edelbrock recommends checking piston-to-valve, piston-to-head, and valve-to-bore clearances, and we found all of our measurements to be adequate. The Edelbrock instructions are very complete, and detail all of the issues you could encounter during installation.
With the heads in place, we installed our Comp Pro-Magnum rocker arms and used a checking push rod to measure pushrod length. After measuring, we ordered the Hi-Tech pushrods from Comp and got busy installing the intake, exhaust, and spark plugs on our engine. Even though the E-Street heads use a spark plug angle of 15 degrees, they will work with most factory and aftermarket exhaust manifolds and headers.
The tti headers we installed in a previous article offered plenty of clearance, and our factory replacement plug wires with 90 degree boots posed no installation issues. Remember that with aluminum heads, anti-seize compound must be used on the threads of the spark plugs to protect against dissimilar metal corrosion. The heads we removed have an open, inefficient combustion chamber. Modern technology gives the Edelbrock heads many advantages when compared to factory Chrysler castings, including hardened valve seats compatible with unleaded fuel.
We picked up a set of Autolite plugs at the local auto parts store for our application. Remember that spark plug heat range requirements depend on the cylinder pressure of the engine, and the general rule of thumb is the hotter the engine, the colder the plug. With the installation complete, we turned the key and fired up the to check for leaks. Our engine ran great and seemed crisper when we opened the throttle, so we were eager to see what kind of improvement the E-Street heads would net.
Our preliminary test drive was encouraging, and we could definitely tell that the in our Chrysler was making more power and torque. With no problems after a local test drive, we took the big Chrysler over to our shop in Tampa, Florida, to strap it onto the Dynojet chassis dyno. Installing new parts on your Mopar is great, especially when you can feel the difference in the seat of your pants. Taking your car or truck to the track is a fun way to track performance improvements as well, but the best way to measure how much power and torque your engine is making is on an engine or chassis dyno.
When we started this project, our Chrysler made a pitiful horsepower, and lb-ft of torque at the rear wheels with its stock, low-compression and exhaust manifolds. Testing our car after installing the Edelbrock E-Street cylinder heads, horsepower climbed to over At areas below peak, we made substantial gains as well, meaning our engine will pull harder throughout the rpm range and really get our big Chrysler moving.
Any time you evaluate numbers from the chassis dyno, you need to remember that these numbers are substantially lower than power and torque at the flywheel. On the chassis dyno, the engine is turning accessories like the alternator, power steering pump, water pump, and air conditioning compressor drive, and power losses through the torque converter, transmission, differential, and full exhaust system can all be substantial.
What we can tell you for sure, is that our Chrysler is much more fun to drive now and pulls harder whether accelerating from a standing start or passing someone at highway speeds. By installing the E-Street heads our mild gained over 30 horsepower and 20 lb-ft of torque, showing clear improvements over the factory castings. With our big Newport strapped to the Dynojet chassis dyno, we confirmed our seat of the pants impression. Power and torque were both up significantly, and improvements were seen throughout the rpm range.
An internal divider optimizes flow quantity and distribution into the manifold and they can be mounted forward, backward, or sideways on Victor EFI square-bore manifolds. Smaller sizes are slightly larger than stock and are a great first step for stock or mildly modified engines. Larger sizes are for more radical, high-output engine combos and in most cases, require port matching of the manifold for proper fitment and performance. These features give you the ability to easily adjust your ignition curve specifically for your engine setup, eliminating the hassle, complexity and limitations of the standard distributor advance mechanism. This type of control will result in a smoother idle, faster acceleration, better peak power, improved fuel economy and the ability to control detonation, all with the touch of your finger in the E-Tuner 4 app.
Zushicage A Chevy Nova project that is turning up the heat! And even with that accomplished, more than half of all EFI conversions on classic muscle cars suffer from fuel starvation unless more steps are taken to sump the fuel pump pickup protecting it from sucking air on modest cornering or braking. John Machaqueiro — November 9, The throttle and transmission linkage from your old carburetor will work too; just transfer your linkage components to the E-Street throttle body from the carburetor. The tablet comes with a sturdy suction cup bracket that allows it to be easily attached to the dash or windshield; an antiglare screen shield and vehicle DC power adapter make it even more hot rodder friendly.
Installing and Testing the Edelbrock E-Street Cylinder Heads
EDELBROCK 3600 PDF