Take your grinder to the intake ports of those peanut ports heads, open them up to match a regular oval intake gasket and you'll be amazed. Just bell mouth them to about 1 inch in and you're good. Big valves aren't necessary either but, will net you about 20 horsepower. Chinese intakes work fine but, also need to be gasket matched. If you have a US made intake, I'd prefer to see that on the engine. Compression with PP heads is no different than any open chamber head. To run pump gas, keep it around 9.5:1. Cam should be no bigger than 224/234 duration. A 750 cfm carb will work fine and a vacuum secondary is best on the street. This combo will net you around 450 horsepower and well over 500 ft lbs of torque. And it'll work to very near 5500 rpm. Regular oval are best but, PP's can be made to work if you already have them or are in a tight budget.

@msh6865

25 күн бұрын

@@bigboreracing356 Mark Jones (VortecPro) has made over 600 horsepower using PP heads.

AFR now makes a peanut port intake for BBCs. Not sure why they didn't have it for their 265 CC heads, but this combo really rocks.

@bigboreracing356

5 ай бұрын

What about the 18° heads?

@xlr8r3VA

5 ай бұрын

@@bigboreracing356 I don’t know about that. I thought only Dart, Brodie, Edelbrock, & GM made 18 deg intakes. I don’t have that kind of money. 🤣

@xlr8r3VA

5 ай бұрын

* Brodix - stupid spell check!!!

@bigboreracing356

5 ай бұрын

@@xlr8r3VA Lol I knew you meant Brodix.

@andy347495

4 ай бұрын

​@@xlr8r3VAAFR makes a peanut port intake now?

You want the Edelbrock RPM intake, the Chinese one will not make the same power. Waist of time screwing with peanut port heads, you are right.

@bigboreracing356

5 ай бұрын

China dont take hottrodding serious but they are serious about taking your money. Lol

Peanut port heads get a bad rap. They were never intended for high performance use. They were intended for low end torque. Put them on a 454, 496, or 502 set up with a short duration cam, and it will out pull everything from off idle to 3500 rpm, but there is nothing left in them above 4000 rpm. You can use se the big oval manifold on peanut port heads. No issues at all. In fact that is how GM does it from the factory. There is no special manifold for peanut ports. The 049 heads are ok. But The best head was the 820 from 1970 L34 396 cars and LS5 454 engines, the second best heads were the 3999241 head from ls3 402 and LS5 454. The 049 was based on both those heads. 2.19 an 1.88 valves really wake them up but you need to do some chamber work to relive the intake valve along the intake side of the chamber. After that they are better than most square port factory heads. Only the L88 / L89 aluminum heads, 291s and 292s iron heads were better. But to be honest, even the cheap Chinese aluminum heads are better than any factory head. By the time have a factory head cleaned, surfaced, new guides, valve job, seals, springs, you are looking at a around 850. For a pair. You can get a set of fully assembled Chinese heads for about 200 more and they will be better than even the best factory heads. The only reason to reuse old iron heads is you are doing a matching numbers restore, or in my case, I build big blocks for off shore boats and drag boats. Sea water kills aluminum in no time flat. And drag boats never reach full operating them, and aluminum heads heat up faster than the blocks, so head gasket problems can happen with them, so I use either all iron or aluminum when building drag boat motors. It just works better for longevity in a drag boat

@bigboreracing356

5 ай бұрын

The Edelbrock intake did not help my buddies 454ss. He had to swap to 049 heads.

@andy347495

4 ай бұрын

this couldn't be farther from how works in the real world. I built a 489 with a 212° at .050 cam it made peak hp of 435 at 4600 rpm and 555 lb/ft at 3500 rpm. so there goes your peak rpm theory. it ran pretty good, but with 049's it ran a lot better. there was more power everywhere on the curve and made about 40 horse more on top. the AFR 265's will add about another 50 on top of that. the peanut port heads just don't flow enough air for big cubic inch engines, period. i believe peanut ports were made with emissions and gas mileage in mind, not power. they also use a 193/203° at .050 cam with .398/.420 lift. they don't need any bigger of a port either.

@keithscudder7136

4 ай бұрын

In all my years of working on engines, the cam is very important. For street or mid-range power you'll need a Dual Plane intake and 049 heads would help. Don't try for just Horsepower as your engine needs to make decent torque. Select the right cam.

@bigboreracing356

4 ай бұрын

@@keithscudder7136 I shelved the 049 heads and dual plane because the combo would not make Horsepower past 6800RPM

@keithscudder7136

4 ай бұрын

Most of my customers want street/strip engines and I recommend that package and some good Headers with a cross-over pipe. You need bottom end power on the street plus, more torque=better burn-outs.

Large oval port heads are better than peanut port heads and rectangular port heads are better than both.

@msh6865

27 күн бұрын

Not on the street they aren't. You lose intake velocity with a square port head. Oval ports will support anything you want to do on the street. If you want to shift a big block at 7500 rpm you might see a slight horsepower increase above 6500 but, it won't win you any races on the street.