New Peanut Port Head Test

[1980RS]

Car picked up around a tenth with the rpm intake but hated the tapered spacer. I think the Holley Strip Dominator was a pretty efficient intake and I will go back to it if I put a different cam in the car with the PP engine.

[magwillfl]

1980RS, I would like hear more about your combination. What size valves? How much porting? Flow numbers? What camshaft(s) did you test?
At what RPM did the combination peak? Thanks.

[1980RS]

1980RS, I would like hear more about your combination. What size valves? How much porting? Flow numbers? What camshaft(s) did you test?
At what RPM did the combination peak? Thanks.

Hi, I did not get to flow these heads so it was take them to the track to test as the shop that was going to do them had no 4.250 bore test fixture. I did not go hog wild on these just massaged areas that I saw Vortecpro do but I did add the rough surface texture on the intake ports and chambers. The cam is a Comp 282S .561 lift 236°@.050 duration on a 110 LCA. The engine with the bigger Demon seems to pull easily to 6 to 6200 RPM. Next test was a a little bigger Crower cam on a 105° LCA but the track closed early and now I wished I would have done the cam and intake swap at the same time. Will just have to wait until next year and be happy with what I have achieved with the low compression 461.

[levisnteeshirt]

the gen 5 366 heads , pretty much makes the peanut port heads obsolete huh ? I bought a set of 366 ovals from the 80s too that aren't peanut ports

[vortecpro]

1980RS, I would like hear more about your combination. What size valves? How much porting? Flow numbers? What camshaft(s) did you test?
At what RPM did the combination peak? Thanks.

Hi, I did not get to flow these heads so it was take them to the track to test as the shop that was going to do them had no 4.250 bore test fixture. I did not go hog wild on these just massaged areas that I saw Vortecpro do but I did add the rough surface texture on the intake ports and chambers. The cam is a Comp 282S .561 lift 236°@.050 duration on a 110 LCA. The engine with the bigger Demon seems to pull easily to 6 to 6200 RPM. Next test was a a little bigger Crower cam on a 105° LCA but the track closed early and now I wished I would have done the cam and intake swap at the same time. Will just have to wait until next year and be happy with what I have achieved with the low compression 461.

My 236 peanut ports flowed 306 @ 28 inches 4.310 bore SF 600 @ .550 lift, for reference.