We couldn't slap this blower on possibly the ugliest motor on the face of the planet, so w
We left off with our 350 test mule in the July issue, when we rebuilt the bottom end with a rotating assembly from Summit Racing and pumped out a driver-friendly 468hp and 443 lb-ft of torque. We were poised to drop this baby into a first- or second-generation hot rod and make a nice daily driver until Trick Flow Specialties suggested we take out the friendly in "driver friendly" and scare the pants off anyone at the wheel. What we're referring to is Trick Flow Specialties' new carbureted, Roots-style supercharger kit that will bolt right up to our budget small-block.
Trick Flow Specialties' supercharger unit is straight from Magnuson Products and features a 122 high-helix rotor package, which is designed to create more power and torque at a lower rpm than any other unit.
At this point, our small-block is equipped with Trick Flow's 445hp top-end kit, complete with 195cc cylinder heads and fully roller valvetrain. The cam measures 0.558/0.558 and 246/254 degrees of duration. Up top pre-supercharger was an Edelbrock Air Gap intake and a Summit Racing 750cfm carburetor.
Our mission was to simply bolt-on the Magnacharger, leaving the bottom end as is, to simulate exactly what the average gearhead would do. Our biggest fear was the Keith Black hypereutectic pistons that were a perfect match for our non-forced air application. After making some calls for advice from the manufacturer, we decided to shove on and run this baby as is and make insane horsepower. Tuning would be the key to keeping it healthy.
We headed over to B&B Automotive Machine in Lynbrook, New York, slapped on a 950cfm carburetor from Proform, put the pedal to the metal after some minor tweaking, and shocked the heck out of us all as the dyno graph appeared on the computer.
What was the outcome? Get this: 570-plus lb-ft of torque from 2,500 rpm all the way up to 4,500 rpm, a gain of approximately 140 lb-ft through the same rpm range. On the street, this motor is going to act like a completely different animal than it ever would have in N/A trim. At the hit of the throttle from a cruising roll, we expect any sort of street tire to absolutely explode or pin your head hard into the back of the headrest.
We spent a great deal of time tuning to ensure we weren't going to hurt our brave 350ci Mouse motor on 93-octane fuel. We examined at least two spark plugs after every single pull, swapped all eight out at one point for a colder set, checked the roller rocker arms, and watched water and oil temperature constantly. We started the day at 22 degrees of timing and ended at 27 degrees as the motor continued to make power up to that point. Check it out.
First and foremost, we ripped off the stock balancer and broke out the flat black paint to
Summit Racing sent us a lot of chrome, including a set of valve covers, a fuel pump block
...balancer, oil pan, water pump, alternator, and a whole lot more...
...Check out superchevy.com for a web-exclusive look at everything we installed...
...to get our engine ready for a car show.
Then it was off to B&B Automotive Machine. Using B&B will give us consistent results, as t
As few have had their hands on this blower kit prior to us, we mocked up as much as we cou
...great we found this out when all was apart. The water neck we used needed a little mor
The base plate simply installs to the block and cylinder heads using the same holes as the
...all the hardware we needed for the kit, which saved us a great deal of time since much
...hardware is metric. We placed some silicone around the water jackets and across the fr
...the block and positioned the base plate into place.
Once evenly tightened into place, we made sure the rubber seal that sits between the base
The Magnuson 122 super-charger is available in this satin finish and it comes in a short o
Proform's 950cfm race series carburetor was bolted atop the supercharger and looked great
Next, we bolted the crank pulley into place and using a straight edge, ensured the blower
When we first fired up the engine, the crank pulley was obviously not spinning true. Turni
Our first pull was made with the 3.250-inch blower pulley in place, which nets approximate
We then switched to a set of plugs designed for a forced-air application. We went to a non
B&B's shop is state of the art with fresh air flow, ambient noise reduction, quick disconn
As the BSFC (brake specific fuel consumption) and spark plugs stayed on the rich side, we
...pulled all eight spark plugs to ensure we were not doing any damage to the engine. Not
Last but not least, we decided to go for broke and turn up the wick. At 7 psi, we were enc
...with the pressure loss. We then installed the 2.8-inch pulley, increasing boost to 10
|TRICK FLOW SPECIALTIES SUPERCHARGED |
350 (7 PSI BOOST)
|Torque ||Horsepower || |
|530 ||517 |
| ||Before || || After (10 PSI) |
| ||HP ||Torque ||hp ||Torque |
|2900 || || || || |
|3000 ||332 ||574 |
|3100 ||343 ||574 |
|3200 ||355 ||576 |
|3300 ||374 ||575 |
|3400 ||386 ||573 |
|3500 ||400 ||575 |
|3600 ||408 ||581 |
|3700 ||420 ||577 |
|3800 ||431 ||577 |
|3900 ||441 ||577 |
|4000 ||321 ||422 ||449 ||576 |
|4100 ||332 ||425 ||461 ||573 |
|4200 ||340 ||425 ||468 ||574 |
|4300 ||355 ||434 ||477 ||569 |
|4400 ||363 ||434 ||484 ||567 |
|4500 ||370 ||432 ||493 ||563 |
|4600 ||384 ||439 ||500 ||561 |
|4700 ||396 ||443 ||504 ||557 |
|4800 ||404 ||442 ||506 ||550 |
|4900 ||412 ||442 ||524 ||541 |
|5000 ||418 ||439 ||528 ||542 |
|5100 ||421 ||431 ||531 ||540 |
|5200 ||432 ||433 ||532 ||532 |
|5300 ||435 ||428 ||539 ||527 |
|5400 ||446 ||429 ||543 ||518 |
|5500 ||446 ||421 ||555 ||515 |
|5600 ||447 ||413 ||549 ||510 |
|5700 ||450 ||409 ||555 ||512 |
|5800 ||450 ||401 ||548 ||498 |
|5900 ||463 ||405 ||546 ||495 |
|6000 ||465 ||394 ||553 ||481 |
|6100 ||465 ||388 ||548 ||472 |
|6200 ||468 ||388 ||547 ||470 |
|6300 ||461 ||376 ||542 ||458 |
|6400 ||455 ||374 ||540 ||450 |
|6500 || || || || |