Does Smoothing Out the CNC Lines Help Flow: AFR 227 Race port

[@DMR67442]

I always watch your videos to the end. Sometimes I wish they were longer.

[@timarnott4483]

I do too......i always stick around to the end......i wanna know as much as possible, Eric is quite talented, and has a way of explaining thats easy for me......GET A T-SHIRT......my order is in!!😎

[@yarrdayarrdayarrda]

AFR's always struck me as the best value in regards to the 8mm valves, full CNC, decent parts, etc. Brodix/Dart/etc always more money for the same thing out of the box, at least in regards to conventional heads. Good to see the hand blending had basically no effect on the flow numbers as I couldn't bring myself to touching my AFR 245's when I bought them so many years ago now.

[@garlandjones7709]

For assembled heads, yes.

[@DSRE535]

The big thing that we always found out was smoothing out the transition right in the middle of the short side radius phone where the CNC programs intersect from the bowl side to the intake side

[@freeradical431]

It be cool to see a wall built up off the vein up to and matching the profile of the valve. Basically sectioning the long side from the stem to the seat into two halves. That way the air fuel mix ran straight past the valve- no turbulence on the backside of the stem- into the chamber.?

[@michaelparadisis4076]

I have AFR 357 heads Tony Mamo ported Bowl and fitted 2.350 valves -going on my pump gas 582. I always wondered if smoothing out helped flow/performance on CNC heads. Now we know. Thanks for this Eric.

[@ryangulley1082]

What do they flow? I have a stock set for a 540 turbo build

[@michaelparadisis4076]

@@ryangulley1082 440 cfm at .800”. Incredible low lift figures though. Superior to out of the box 357 AFR’s.

[@jakewade7388]

Looking forward to the 706 flow results.

[@jamest4363]

love to see you flow the new hemi LS head they released at pri

[@bradmarking9106]

I got a set of speedway 461 double hump heads,going to put them on. Sat short block. I was wondering if you have any comments on how these heads flow

[@tomhamilton9140]

Thank you this answers what i have thought about for years. 👍

[@mikeleschber1316]

I have always wondered if smoothing them helped.....now we know. Thanks!

[@dtiger8317]

Eric have you ever heard of a set of air flow 215 cc heads This is quite a few years back. The specs I heard on them was they flowed 340CFM at 500. Thanks

[@WeingartnerRacing]

Yes they were a raised runner. I wish they were still available.

[@jrdmotorsports9718]

Was a bad ass head. Used many of them years ago. Only drawback? Bad castings. Core shift, thin in the wrong areas, etc.. but bad ass when fixed.

[@jeremypike9153]

I would think that smoothing out the cnc lines in the combustion chamber would help prevent pre-detonation

[@johnsheetz6639]

220cc heads I don't know what the power limit is for a 220 head but it's got to be huge

[@Levisnteeshirt1]

You never mention the AFR 235 sbc head. Joe Sherman had a 800hp 406 with em using a t ram

[@andyreiwitch8845]

Eric, wondering if there's a difference between blow through vs. suck through on the flow bench in terms of stable laminar flows along the runner and the port shape/transitions. When boosted, the flow is not being drawn in from the negative atmosphere the piston creates in the cylinder, it is just the opposite where the overcharging of the port and cylinder is created by atmosphere +... Therefore being blown/forced into the cylinder. Just curious if you have ever discussed or experimented with flows on intake and exhaust with a blow-through. Keep up your excellent work and videos. I truly appreciate your experiments and explanations you provide us all.

[@EricErnst]

I think it's still ultimately a pressure differential. The piston going down creates a negative pressure and atmospheric pressure forces air and fuel into the cylinder. The pressure is just higher in a boosted application.

[@Saddedude]

Doesnt matter. The ports are always under pressure via the atmosphere.

[@V8Lenny]

Every engine is boosted by at least PR1

[@EricErnst]

@Made By Nobody Famous depends on how much boost you are running. 500 seems like an arbitrary number to be throwing out there.

[@GarcBomber]

Great info. How about smoothing the top cut lip on the chamber, flow difference? Maybe you've already touched on that though...

[@williamrobb638]

Hey Eric wondering if you have done any work with ls style 799 heads if so what are your thoughts for using them in a turbo application.

[@WeingartnerRacing]

I have done the 243. They turned out good and made good power.

[@nitrofumes2012]

Thank Eric! Another great video! I have always been a BBC racer but just bought another car that came with a SBC so I decided to give it a try. It’s got a set of world product -3 heads on it and I’ve been thinking of switching to aluminum.. I appreciate your data! Thanks again!

[@WeingartnerRacing]

Don’t run cast iron heads.

[@nitrofumes2012]

@@WeingartnerRacing I’ll be giving you a call after the holidays!

[@magnusdanielsson2749]

Interesting as always. Bit of an odd question. Have you done any porting on the cooling holes to improve cooling flow?

[@WeingartnerRacing]

Nope you would be surprised how little coolant flow you need to keep cool.

[@rle1020]

Hey Eric can you do a explanation video on rolling valve angles and how much can be gained power wise from going from 23 degree to say a 21 or whatever degree by rolling them.

[@WeingartnerRacing]

Look at the video where I angle mill the ls head. It rolled from 15 to 12

[@paulthompson1654]

hi please do a comparison / test on competition AFR 220/227 . Is there a gain going to the comp version and is the 227 a better flow than the 220 version??? . Thanks for showing the Afr 195 Comps were the best . [ Wow ,pricing is another subject ..]

[@WeingartnerRacing]

If a set of competition 227 comes in I will. I already have on the 220cc.

[@paulmclovin2279]

The race port is the rougher port. The competition port is the finer cut.

[@paulmclovin2279]

I wish that my competition port 220 heads weren’t already installed, because I would like to see how they flow out of the box,

[@WeingartnerRacing]

I have done a video on them already with real flow numbers.

[@paulmclovin2279]

@@WeingartnerRacing I am looking, but only find the 220 with the rougher cut (race port).

[@Levisnteeshirt1]

If it left the small ridge in the other direction it might help reduce reversion

[@edwardschmidt8100]

have you ever ckecked out a blue print 190 head i watch all your vids and to me t.he head looks like a 195 afr head

[@WeingartnerRacing]

No I wanted to get a set and work on them but they are not available when I checked.

[@marcstlaurent3719]

Excellent info , thanks Eric

[@pmd7771969]

I'd say yes

[@SirHC888]

We knew about not smoothing out the CNC lines back in 2006 when the CNC ported LS7 came out in the Z06.

[@theoriginalmungaman]

The new speedmaster castings are much better than those Edelbrock castings!

[@theoriginalmungaman]

@port nut By comparing them side by side.

[@ecc5119]

Wet flow it 😂

[@jrdmotorsports9718]

Better yet, compare them on an actual running engine. Boy would feelings get hurt 😆

[@bigredracer7848]

23👍's up WR thanks for sharing

[@jonbarnett6132]

As always, very informative. BUT - way too long! Talk talk talk talk talk. Come on man, you could have gotten to the point in literally 1/10 of the time you took. Time is valuable!

[@Saddedude]

This comment sucks. Dont wan a learn dont watch.

[@b.c4066]

The guy ports heads for a living, he never claimed to be a teacher, professional speaker, or efficient at giving seminars, don't like don't watch.

[@garlandjones7709]

This free information is worth much more than his videos cost. Just saying