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VW Cylinder Head Quick Reference Sheet
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Jebchevelle
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PostPosted: Fri Sep 13, 2019 6:34 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

[email protected] 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.
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AlteWagen
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PostPosted: Sat Sep 28, 2019 5:52 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

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

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AlteWagen
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PostPosted: Mon Feb 17, 2020 4:41 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

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


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Is it just me or does it look like CBs Panchito casting?
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AlteWagen
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PostPosted: Tue Jun 16, 2020 2:36 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

Some more info on the redesigned Autolinea 043

https://blog.bbt4vw.com/2018/05/25/friday-product-update-194/
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57BLITZ
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PostPosted: Tue Jun 16, 2020 3:37 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

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!

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PostPosted: Tue Jun 16, 2020 5:35 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

Thanks for the pics! Can you post some of the rocker area?
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57BLITZ
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PostPosted: Tue Jun 16, 2020 6:03 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

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

Thank you AlteWagen for this informative thread!


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

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Mrblue01
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PostPosted: Wed Jun 17, 2020 10:22 am    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

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...

Image may have been reduced in size. Click image to view fullscreen.


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?
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slalombuggy
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PostPosted: Wed Jun 17, 2020 10:56 am    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

My new Ultra Wedgies from CB have the same step.

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PostPosted: Wed Jun 17, 2020 3:00 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

what does CFM stand for all I know it is about the flow rate but what is high and what is low?
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AlteWagen
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PostPosted: Wed Jun 17, 2020 7:43 pm    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

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).
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PostPosted: Fri Jul 24, 2020 7:49 am    Post subject: Re: VW Cylinder Head Quick Reference Sheet Reply with quote

Forgot to add this here

Clone AA 502 on the market.

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