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Fri Sep 13, 2019 6:34 pm

roy@mofoco.com wrote: Jebchevelle wrote: AlteWagen wrote: I was only able to get one number for the L3 head from John at AC.net. I asked Johnny who was our rep from AA if they had any numbers for any of their heads and he said no.

I think that the improved flow over a stock head when comparing the L3 is due to the combustion chamber shape. All of the ports Ive measured as cast were SMALLER than a stock head.

I too would love to see out of the box flow numbers for the 500 series.

I just purchased a set and am in no hurry maybe I could find a place to flow bench them? maybe painter's grinders in denver? I was gonna have them redo my stock heads but since the price was a wash I purchased the new heads setup as I figured I would need them. might have wasted my money time will tell, my heads need exhaust stud repairs and machine work pus the one head has a warped rail where the valve cover sits and leaks oil without a tone of sealer. was told $300 plus to fix them and put on hi rev springs. So new heads it is. I got mine with the 35.5mm intake and 32mm exhaust so may be no better then stock.

It wouldn't be a bad idea to flow test them but you will have a few hurdles to overcome to accomplish that. One, you will need a fixture as most race shops aren't equipped to flow a VW head. I had to build my own fixture. Two, you need to recreate how all the other companies flow tested their heads as close as possible otherwise your results won't mean much. Three, you need to have another head in hand as a "test" that has published flow numbers so as to qualify the bench that you are using. Flow testing a VW head is no simple 10 min in and out of the shop job. You need to make sure your test is accurate otherwise you may be heaping undue praise or undue slander on the company whose heads you are testing. I spent many thousands of dollars and over a year and a half of time flow testing my heads before I felt comfortable publishing the results. I also bought multiple competitors heads that had published flow numbers so I could make 100% sure that the results I got on my heads were accurate.
That is why I thought about painter's grinders they are the local vw experts here. I have no clue who else could or would do it.

Sat Sep 28, 2019 5:52 pm

Outflow CB Strip Dominators? 279cfm, wonder what pressure they are using

Mon Feb 17, 2020 4:41 pm

Looks like Autolinea has a new casting for their 043 clone. Anyone get a close look at them yet?

Is it just me or does it look like CBs Panchito casting?

Tue Jun 16, 2020 2:36 pm

Some more info on the redesigned Autolinea 043

https://blog.bbt4vw.com/2018/05/25/friday-product-update-194/

Tue Jun 16, 2020 3:37 pm

AlteWagen wrote: Is it just me or does it look like CBs Panchito casting?
AlteWagen wrote: Some more info on the redesigned Autolinea 043

https://blog.bbt4vw.com/2018/05/25/friday-product-update-194/

Comparing the photos in the link to the Panchito head I have in my hands . . . looks to be a different casting . . . many differences!
Between the intake port and the exhaust port on the Panchito head . . . 9 holes for air-flow!

Tue Jun 16, 2020 5:35 pm

Thanks for the pics! Can you post some of the rocker area?

Tue Jun 16, 2020 6:03 pm

AlteWagen wrote: Thanks for the pics! Can you post some of the rocker area?
Thank you AlteWagen for this informative thread!

Bonus... detail photo of C.N.C. reworked chamber option... heads are opened for 94mm...

Wed Jun 17, 2020 10:22 am

57BLITZ wrote: AlteWagen wrote: Thanks for the pics! Can you post some of the rocker area?
Thank you AlteWagen for this informative thread!

Bonus... detail photo of C.N.C. reworked chamber option... heads are opened for 94mm...

I am wondering why CB heads like yours have a shallow (0.010"?) step on the deck surface? I have a set of SuprPro's that are the same. I am trying to get max compression ratio and this is working against me. Anyone know?

Wed Jun 17, 2020 10:56 am

My new Ultra Wedgies from CB have the same step.

brad

Wed Jun 17, 2020 3:00 pm

what does CFM stand for all I know it is about the flow rate but what is high and what is low?

Wed Jun 17, 2020 7:43 pm

MitchS046 wrote: what does CFM stand for all I know it is about the flow rate but what is high and what is low?

It is a measure of how much air can flow through a given restriction over a period of time, cubic feet per minute

Low in this case would be stock flow as a baseline (heads at top of chart)

The general thought is the HP possibility is related to the amount of max flow (200 cfm could possibly get 200HP with all things being perfect).

Fri Jul 24, 2020 7:49 am

Forgot to add this here

Clone AA 502 on the market.

https://www.thesamba.com/vw/forum/viewtopic.php?t=738259

Mon Feb 22, 2021 3:43 pm

AlteWagen wrote: Why the change in tune Roy? you posted this in the billet head thread in direct response to a post of Remmele heads

roy@mofoco.com wrote: Der6VoltFahrers wrote: Some pictures of my Remmele Type 1 heads.
They have 45x40 valves and 94mm bore.

They are set up for 10,5:1 compression.

Look at all those fins!!!!

And the air flow going right down the middle in between the cylinders!!!

Those guys definitely know what they are doing....very cool 8)

Looks like more than adequate air flow through the middle of the head as you point out. A custom lower deflector plate will get the cooling air where it needs to be.

Also appears that there was some changes in the center cooling slot compared to the prototype shown above

That is type 4 head, 12.5mm more cylinder spacing.

Thu Dec 02, 2021 9:54 am

Johannes Persson wrote: Heads latest upgrade with modifications to intake throat, valve seat and chamber. Flow improved from 262.5cfm to 277.5cfm at 25"H2O or from 277.7cfm to 293.6 cfm at 28"H2O.
Very exciting!
I guess with this upgrade I have to change the name of the heads from MS250 to MS260

Tue Dec 21, 2021 7:38 pm

Had to add this thread here for anyone working on WW Okrasa heads.

https://www.thesamba.com/vw/forum/viewtopic.php?t=757037

from the thread are the flow numbers for the WW Okrasa heads

Alstrup wrote:
All flow numbers are at 28"

I might have to try machining some seats in the future!

Tue Dec 21, 2021 8:33 pm

AlteWagen wrote: Had to add this thread here for anyone working on WW Okrasa heads.

https://www.thesamba.com/vw/forum/viewtopic.php?t=757037

from the thread are the flow numbers for the WW Okrasa heads

Alstrup wrote:
All flow numbers are at 28"

I might have to try machining some seats in the future!

The chamber looks similar to the Berg semi hemi.

Tue Dec 21, 2021 9:05 pm

QRP wrote:

The chamber looks similar to the Berg semi hemi.

Looks like a custom piston dome is going to be used because of the shape. I think a large dome piston for 1600 based builds sure would help the efficiency of all those semi hemi heads sitting on the shelves and even the stock type chamber design.

A domed, forged, thin ring pack piston in 88mm would be a best seller with a 92 coming in a close second. A 'B' pin height would also open up a lot more options for the 88 since they have not been available for decades

Sun Apr 02, 2023 2:27 pm

Anyone have a better scan of this chart?

Wed Jan 08, 2025 9:04 pm

GREAT NEWS!!!

https://www.thesamba.com/vw/forum/viewtopic.php?t=799059

Brian_e wrote: Super quick phone pics.

Brian

Sun Jan 19, 2025 12:18 pm

some stock numbers for the chart:

043-101-375H - early 2000s castings (2001, 2003, 2003), small valve FI head 33mm/30mm valves

41-43cc chambers on the 3 I've measured (without the step). Step has been a consistent .054" on all 6 bores. (fairly low mile used - 2 have 8k, the 3rd isnt known)