Best Budget Heads for Small Cam
01-25-2006, 12:57 AM
#21
Originally Posted by -Joseph-
Redneck Z, IMO, I think you would be better off with the PRC LS6 heads like I used. I would even keep the stock LS6 springs with a cam of that size. The "yellow" springs are good for ~.560" lift.
The intake flow numbers between both heads are very close, even with the LS6 Stage 1 heads using stock valves. The LS6's can also be had in a similiar package as the PRC 5.3L as far as valve and spring options, but would do even better with big valves. I like mine as I don't have to flycut the pistons using a larger camshaft, while I would be cutting it close with a 2.04" valve with my cam.
The compression between the LS6 heads and PRC 5.3L heads is marginal, LS6 would be 10.5 to 1 unmilled, while 5.3L would be between 10.6 - 10.7 to 1. With either head, you will need 99+ valve covers and coil pack brackets since you have a 98 F-body.
One other thing we could do is mill the LS6's for a little more compression if desired.
The intake flow numbers between both heads are very close, even with the LS6 Stage 1 heads using stock valves. The LS6's can also be had in a similiar package as the PRC 5.3L as far as valve and spring options, but would do even better with big valves. I like mine as I don't have to flycut the pistons using a larger camshaft, while I would be cutting it close with a 2.04" valve with my cam.
The compression between the LS6 heads and PRC 5.3L heads is marginal, LS6 would be 10.5 to 1 unmilled, while 5.3L would be between 10.6 - 10.7 to 1. With either head, you will need 99+ valve covers and coil pack brackets since you have a 98 F-body.
One other thing we could do is mill the LS6's for a little more compression if desired.
My current heads are ported 241's so I already have the valve covers and brackets. I think I've made up my mind....i'll be calling you guys shortly. 
01-25-2006, 01:24 AM
#22
TECH Senior Member
From my experience, a smaller size runner will be better. TSP carries DART $ 1399.00 as cast and those would be perrrfect for a cam at or below 220 DUR on intake.
62 cc chamber as well, no milling needed.
62 cc chamber as well, no milling needed.
01-25-2006, 06:37 AM
#27
Originally Posted by PREDATOR-Z
From my experience, a smaller size runner will be better. TSP carries DART $ 1399.00 as cast and those would be perrrfect for a cam at or below 220 DUR on intake.
62 cc chamber as well, no milling needed.
62 cc chamber as well, no milling needed.
Suprfun
