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E-Series E-205
The new E-205 cylinder head for small-block Ford 289, 302 and 351W engines provides race-level performance while maintaining full compatibility with OEM equipment. It features larger runners for increased airflow and revised exhaust ports and larger diameter springs for higher lift camshafts making it ideal for a spec series racer and larger displacement engines. The exhaust port flange is in the stock location to allow for the use
of off-the-shelf headers and hardware while the enlarged valves and ports support the power needed to compete at engine speeds of up to 6500 rpm. The E-205 cylinder head is capable of supporting more than 500 naturally aspirated horsepower and even more in forced induction applications.
Cylinder Head Specifications |
| Combustion chamber volume |
60cc |
| Intake runner volume |
205cc |
| Exhaust runner volume |
62cc |
| Intake valve diameter |
2.08" |
| Exhaust valve diameter |
1.60" |
| Valve stem diameter |
11/32" |
| Valve guides |
Maganese Bronze |
| Deck thickness |
5/8" |
| Valve spring diameter |
1.46" |
| Valve spring maximum lift |
.575"(5028) / .650"(5027) |
| Rocker stud |
3/8" |
| Guideplate |
5/16" |
| Pushrod diameter |
5/16" |
| Valve angle |
20° |
| Exhaust port location |
Stock |
| Bolt torque (7/16") |
70/80 |
| Bolt torque (1/2") |
100/110 |
| Made In |
USA |
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Technical Notes: Hardened pushrods required, use Edelbrock #9632 (flat tappet only) for 302 applications. Will not accept rail rockers. 289-302 V8s require Head Bolt Bushings #9680 and either Head Bolt Kit #8552 (7/16") or stock head bolts. Match with Edelbrock head gasket sets. Bare heads will have valve guides and seats installed, but will require final sizing & a valve job to match the valves you will be using. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. |
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| Description |
Bare (Single) |
Complete (Single) |
| E-205 Small-block Ford (#5028 Equipped with springs for hydraulic flat tappet) |
5026* |
5028* |
| E-205 Small-block Ford (#5027 Equipped with springs for mechanical flat tappet and hydraulic roller camshaft applications) |
5026* |
5027* |
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| #5027 |
| Installed Height: |
1.900" |
| Seated Pressure: |
145 lbs. |
| Open Pressure: |
380 lbs. @ .600" lift |
| Max Valve Lift: |
.650" |
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| #5028 |
| Installed Height: |
1.800" |
| Seated Pressure: |
120 lbs. |
| Open Pressure: |
320 lbs. @ .600" lift |
| Max Valve Lift: |
.575" |
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Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench
| #5027 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
65 |
128 |
179 |
223 |
253 |
267 |
277 |
| Exhaust |
57 |
96 |
128 |
155 |
168 |
175 |
180 |
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AMC
Flathead
