The base package—without any extras—will set you back $14,950 and that includes the ignition and carburetor. The other two packages produce 525 hp (Extended Cruise) and 565 hp (Classic). The Extended Cruise goes for $13,500, while the Classic is listed as $13,950. Like the HHR, the pricing includes the ignition and carburetor.
New for 2011 is an optional EFI version with an Inglese intake manifold, which utilizes a set of eight throttle bodies. SSRE pre-programs the FAST EZ-EFI system during the engine's dyno session. The EFI system jumps the price tag by $5,200 but will add a unique flare to your Mustang or Ford.
A package deal, like the Ultra Street 427, removes the guesswork from making horsepower, so you don’t have to waste time just talking about going fast.
Naturally, we wanted to checkout the most powerful of the bunch, the Hot Hydraulic Roller (HHR).
Dyno Results
| RPM | TQ | HP |
| 4,000 | 512 | 390 |
| 4,100 | 517 | 404 |
| 4,200 | 522 | 417 |
| 4,300 | 533 | 436 |
| 4,400 | 541 | 453 |
| 4,500 | 549 | 471 |
| 4,600 | 558 | 488 |
| 4,700 | 562 | 503 |
| 4,800 | 566 | 518 |
| 4,900 | 570 | 531 |
| 5,000 | 570 | 542 |
| 5,100 | 571 | 554 |
| 5,200 | 570 | 565 |
| 5,300 | 569 | 574 |
| 5,400 | 566 | 582 |
| 5,500 | 561 | 588 |
| 5,600 | 556 | 593 |
| 5,700 | 551 | 598 |
| 5,800 | 546 | 603 |
| 5,900 | 540 | 607 |
| 6,000 | 534 | 610 |
| 6,100 | 527 | 612 |
| 6,200 | 520 | 614 |
| 6,300 | 513 | 616 |
| 6,400 | 507 | 618 |
4 The custom camshaft is...
4 The custom camshaft is cut by Comp Cams, and Shafiroff was tight-lipped about it. He did reveal that it was well under 0.600-inch lift but that was about it.
5 A Cloyes true-roller timing...
5 A Cloyes true-roller timing chain set connects the crankshaft to the camshaft. The SSRE engine builders check cam timing to ensure proper operation and dyno results.
6 Mahle forged aluminum pistons...
6 Mahle forged aluminum pistons are standard in all three Ultra Street 427 combinations. The HHR engine features 10.7:1 compression, where the Classic and Extended Cruise versions both have less with 10.25:1 and 9.7:1, respectively.
7 A plasma-moly ring set...
7 A plasma-moly ring set is standard with all Mahle pistons. Shafiroff gives a two-year warranty on the Ultra Street lineup, so ring seal is very important for longevity as well as power production.
8 ARP bolts are used to secure...
8 ARP bolts are used to secure the rod cap and H-beam rod around the steel crankshaft. Clevite bearings are the bearing of choice for both the rods and mains.
9 SSRE engine-builder Jack...
9 SSRE engine-builder Jack Boer bolts the oiling system to the bottom of the Dart SHP block. It includes a Melling HP oil pump and Milodon pick-up and oil pan.
13 SSRE utilizes CNC-ported...
13 SSRE utilizes CNC-ported AFR 225 cylinder heads. The intake valves flow 324 cfm at 0.800-inch lift and a stout 310 cfm at 0.600-inch lift. The flow testing was accomplished with a 4.125-inch bore.
14 The intake valves measure...
14 The intake valves measure 2.08 inches and the exhaust checks in at 1.60 inches. AFR delivers its 225 cylinder head with a 72cc combustion chamber, which is also cleaned up on the CNC mill.
15 The aluminum heads are...
15 The aluminum heads are sealed to the iron-block with a Fel-Pro head gasket that has a pre-flattened steel wire for added sealing. ARP bolts are used to fasten the cylinder head to the Dart block’s deck.
16 The raised exhaust ports...
16 The raised exhaust ports are CNC-ported and flow 258 cfm at 0.800-inch lift and 248 cfm at 0.600-inch lift using the same 4.125-inch bore and 28 inches of water as the intake flow test.
17 SSRE utilizes its own...
17 SSRE utilizes its own set of valvesprings that are selected to work specifically with the camshaft and overall combination.
18 Comp 1.6:1 roller rocker...
18 Comp 1.6:1 roller rocker arms are used in all three engine combinations.
10 A standard balancer is...
10 A standard balancer is included in the package, but SSRE offers several upgrades, including SFI-certified balancers that are legal for NHRA competition.
11 The hydraulic-roller lifters...
11 The hydraulic-roller lifters are designed for high rpm; all three versions of the engine feature hydraulic-roller setups.
12 The Dart SHP is capable...
12 The Dart SHP is capable of handling OEM-style lifters, dog-bones, and spiders.
19 MSD was tapped for its...
19 MSD was tapped for its Pro Billet distributor, and timing was set at 34 degrees for all dyno-testing. SSRE offers a complete MSD lineup for those who need to upgrade their Mustang’s ignition system.
20 Another option is the...
20 Another option is the addition of a high-performance, six-valve mechanical fuel pump, which comes with fuel lines and a fuel filter already installed, and used during the engine’s dyno session.
21 Here is a shot of the...
21 Here is a shot of the Ultra Street 427 Classic package with the EFI setup. The Inglese intake manifold and FAST EZ-EFI system have proven to make similar power to the single-plane intake/carburetor setup during the Ford engine development process.