Edelbrock rpm head question
I just got some edelbrock performer rpm heads 6077 anyone know anything about these heads? Are they reliable? Are they good heads? ect.
Slappy, IMO, these heads are good and OOTB, besides a quick looking over at a shop for any possible issues, these heads are excellent street performing heads as they sit. Though, at your CID level, I'd look into prting them with any decent sized street strip cam. Bigger the cam, more the port work with on them.
There are several fellas here that run in the mid and low 12's @ E-town without getting crazy big cams and comp ratio's. There fine exapmles of a street strip ride.
The biggest issue with aluminum anything is the water you ad to your anti freeze mix. It should be distilled water since tap water contains things that will shorten aluminums life. Not to mention aluminum touching iron anywhere, the dis-similar metals do not play well together.
I don't want to steal this thread but I have a question.
I am in the beginning stages of a 408 build. I have contacted Campbell, AD Perf. and Hughes about the rotating assembly. I wanted to use flat top pistons with the RPM heads, but I was told that it wasn't a good idea to use flat top with the build and these heads because the CR would be around 11.5-1 and that was real close to the limit on these heads. They all advised staying with dish pistons. True/ False?
True and False as noted above. The ratio with a 4.06 X .039 gasket will be
11.96 or AKA 12-1. While this is a bit high for pump gas, the key is a big cam to bleed of compresion. A dished piston would be a big help to this for a pump gas freindly engine.
A compresion ratio doesn't limit the head, but the air flow it's capable of is considered it's limiting factor. Fuel is a limiter on ratio. A big cam helps since it bleeds off pressure.
My example (though 40 inchs down) I have run for awhile is;
360 + .030
KB 107+.030 (Of course), they have a 5cc valve reliefs
Fel-Pro gaskets and the heads @ 63cc
all equal
10.82 -1 AKA 11-1.
I ran
93 octane without issue's though I never tried a lower one. I ran the Purple 292/.509 cam with 4.10's and a 4spd.
Also take not again of Mopers post.
Theres guys running in the NINES with them..nuff' said:-D:-D
With what mods and in what weight car with how much cam, converter and gear? What is astreet freindly? Is it the same as the posters or mine.
Your statement may be true, but it is also misleeding to some. A new guy may see that and say, "Race head, that's not what I need." LOL!
I'm running a set of them that were ported, valves were changed to 2.05, changed to a heavy set of springs to run a solid roller...and i'm running in the 9's with them, so I would say they are good for the money.
Did you list your set up in the sticky, "Post your 9 sec. combo's" Yet?
I'd love! to see what it takes and what you did to the car and it's set up.
If ya didn't, please, by all means do so!
