NEW!! All our Standard Pushrod location Edelbrock RPM heads are now built on the new improved castings with fully CNC machined heart shaped chambers and relocated spark plug for improved combustion efficiency
SD Performance spends an extensive amount of time on the dyno, at the track and on the street to develop some of the best performing Pontiac ported cylinder heads on the market today. SD Performance has more 5 Axis CNC Porting and Combustion Chamber Programs for Pontiac heads then anyone and we are constantly working on more and improving existing programs in our never ending search for more pure Pontiac power. All of our heads are flow tested on our state of the art computerized Superflow 600 flowbench equipped with velocity probes, but we've learned that what really counts, is how our heads work in the real world. A flowbench is a great tool which we use daily, but there is more to an efficient head than just flow, too many put their faith in flowbench numbers alone.
If you already have a set of Edelbrock heads we can apply all our packages or just porting to your existing heads as well, drop us a line for more details.
SD Performance has developed our own CNC machined 87cc combustion chamber which we machine into Edelbrock 72cc heads (old style castings), on a back to back dyno comparison our 87cc chamber required about 2 degrees less timing when compared to the std. 87cc Edelbrock combustion chamber (less timing indicates better combustion efficiency which equates to more power with less fuel required and less chance of pre-detonation). We are also able to custom size chambers from 74-90cc's. If you own a set of 72cc heads and want a larger chamber we can take care of that, shoot us an e-mail at techsupport for more details.
All Edelbrock/KRE heads include:(unless stated otherwise)
- Precision sized guides
- High flowing multi angle valve job on our state of the art Rottler SG8 seat and guide machine
- Ferrea and/or Manley stainless steel valves with multi angle cuts for better off the seat flow
- Chrome moly retainers with 10 degree locks
- Viton seals on intake and exhaust guides, for the best oil control available
- Fully CNC ported intake and exhaust ports
- Notched for 1.65 rockers
- Improved oil drainback
- Flow chart
- ARP or Edelbrock 7/16” or rocker studs
- Precision assembly - SD Performance precision assembly means, we test ALL valve springs on a digital spring tester, and set ALL installed heights individually to equalize the springs as close as possible.
Forced induction/Nitrous chamber available for Edelbrock RPM heads with volumes up to 100cc's (see pic above left) $125.00 per head
shoot us an e-mail at techsupport for more details.
Aux. Oil Drain Back holes are a no cost option for all Edelbrock head packages 340cfm and up. Holes (one on each head) are drilled and tapped for 3/8" NPT threads and are right in line with the rear oil drain back hole and exit above the rear exhaust port.
Don't Forget, all Aluminum heads will not work with OEM head bolts and require new Head Bolts or Head Studs, we have ARP fasteners in stock from $82.95.