The Holly Carburetor has proven to be a huge improvement over the original Autolite with better flow and fuel atomization. Larry Stock of the Pantera Parts Connection has found that the ultimate platform for the 351 Cleveland is the Holly 4778 4150 better known as the 700 double pumper. He tested all types of Holly double pumpers including the favored 750, and many recommended vacuum secondary 4150 model's including the 600's and the 735 CFM 428 Cobra Jet carburetors. He choose the 4778 because it seemed to perform out of the box the best. This model also seemed to respond to tuning much better than the others tested. In tuning with a computerized G meter instrument he was able to tune out the flat spots, the sags and bogs. He then, once satisfied that the in car performance characteristics were optimized, put the car on a chassis dyno at a standard temperature and pressure at sea level and jetted the carburetor. The "PPC Special 700 Double Pumper" is ready to go so you don't have to make over 35 separate adjustments and waste over a thousand of dollars in custom Holy parts.
We put this carburetor on another stock engine using a chassis dyno. Took readings with his 750 Holly double Pumper and then replaced it with the PPC special 700 Double Pumper. We see 22 Horsepower increase with no other modifications. This carburetor on this otherwise stock Pantera unwittingly passed a California Smog inspection with a little timing rollback and got 17MPG on a trip to the annual POCA Fun rally. We put the PPC specially modified 700 Double Pumper on another slightly modified Pantera motor and found a similar 17 horsepower increase. Customers comment that the car seems to respond as if unleashed. One customer said that his buddy spent over 6000.00 on a fuel injection system, but "He still couldn't pull me!" Pantera Parts is so confident in these Holly built units that they offer a money back guarantee if not 72% satisfied... Now you just can't beat that now can you !!! OK were just kidding really 100% or your money back !!!
Part# Description List Price
08406P PPC 700 Double Pumper 750.00
Time for job:
PPC - Pantera Parts Connection
550 Mallory Way
Carson City, NV 89701
FAX (775) 283-4410