so i have a 327 275hp engine, and im wanting to get it to around 325-350hp to the wheels and was wondering what all you guys recommend to get it there on a budget. engine runs strong but does smoke a bit, guessing the valve seats need replacing so im going to have the heads rebuilt and upgraded a bit.
so far here is what i have and plan on getting:
i have a set of 1.6 aluminum roller rockers, electric water pump, hardened push rods, and hei distributor
i plan on getting an aluminum under drive pulley kit, electric fan, thumpr cam, intake mani and around a 600cfm carb as well as headers with full exhaust(not sure what you guys are running for headers on these cars as i cant seem to find anything performance wise that states that it will work), and a couple of other things like larger fuel pump, larger oil pan, high volume oil pump, etc any ideas on what a build like this might get to hp wise? or any ideas to get me to my desired 325-350 hp at the wheels?
also the car was a powerglide car orginally but now getting a saginaw 4 speed installed.
Since You are on a budget forget about the electric water pump
, and the electric fan
. You do not need an aluminum under drive pulley kit
, now or if you had an unlimited budget as the only thing you would be attempting to under drive in your plan is the alternator which would have to be spinning three times faster than normal to have any chance at making the amount of power you would need to keep the electric water pump, and the electric fan running.
A High Volume
Oil Pump is used in a race car engine that has reduced the area of the rod bearings on the rods to obtain a greater fillet at the cheeks of the crank for increased strength (the radiused bearings leak more oil at a faster rate than regular bearings do). If you are reusing your stock cast iron crank you do not need a high volume pump. You will need a new oil pump just not a high volume pump (which is just a stock BBC oil pump stuck on a SBC anyway).
Finally if you are going to make your targeted horsepower a Saginaw
transmission will not hold that level of power of 440 horsepower at the flywheel (take whatever horsepower you want at the wheels and multiply by 1.25 to get your flywheel horsepower; though with a standard trans you might get away with less as there is less parasitic loss with a manual than there is with an automatic). You are going to need a rebuilt Muncie transmission.
Which brings up this all important fact. Heads
make horsepower. Not chrome or shinny aluminum, nor electric anything since you have to power whatever electric something off the crank anyway by way of your alternator (there is no free lunch). The most bang for the buck for a SBC head is World Products Sportsman II cast iron head. Buy that and you will not have to worry about rebuilding your old heads. As to a new manifold to put between the heads an Edelbrock RPM Air Gap manifold flows as well as a single plane manifold without loosing the benefits of a dual plane in making torque. Most young guns want a big thumping cam. The Thumper series from CompCams or the Lunati VooDoo cam both make their noise by extending the overlap on the exhaust side which doesn't hurt performance as much, to get the sound you want. Of course you won't make as much power as a shorter duration cam on the street but it gives you the all important noise everyone craves even though they have no idea how duration affects the engines performance (there is a reason race cars sound like they do and street driven cars do not).