Best street head to hit the market in many years

[modok]

[mark tucker]

hmm , my heads will take wet box pattern..... and I had smothered burreatoes tonight..
I think this new cb head will be awesome on dd,street,bus&mild race. it should pack some punch to bus motors with the small ports.

[JasonBaker]

Can someone explain why the heads are 12mm for the plug? Is it to prevent cracks? It's damn near impossible to get a thermocouple for the VDO CHT gauge. I assume someone is trying to tell me that the VDO is junk and I should buy something better? In years past I have seen a few guys bitch, grip, moan and complain about 12mm heads. I didn't understand what the problem was until a few years ago when I got mini-wedge ports. I love the power they make, but I hate the lack of product support for a 12mm thermocouple from manufacturers.

[AlteWagen]

longer threads and more material between the plug and seat which prevents cracking.
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Grapes of Wrath $200 Engine Rebuild
Official Dual Carb Thread
Cylinder Head Quick Reference Sheet

[theDrew]

[smkn_vw]

Yep thermalcouple material ring connectors and test before and after if readings wandered.

Hello head builders...we need heads with #3 spark plug hole slotted to hold the ring connector from spinning, always have to request this mod.
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"So didja?" -Bob Hoover

[AlteWagen]

this thread lists some links to vendors for 12mm senders


http://www.thesamba.com/vw/forum/viewtopic.php?t=541800
_________________
Grapes of Wrath $200 Engine Rebuild
Official Dual Carb Thread
Cylinder Head Quick Reference Sheet

[vwracerdave]

I also feel the 12mm plugs are not necessary and the Pachino heads should have 14mm plugs. The Mexican 043 heads never had problems with 14mm plugs. There are far more choices for 14mm plugs and they last much longer with less fouling problems.
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK
Featured in Dec. 2001 HOT VW's Magazine page 63

Watch my racing video's http://www.youtube.com/user/okvwracer/videos

[AlteWagen]

the few sets of Banditos AND Panchitos ive seen had the 14mm long thread plugs
_________________
Grapes of Wrath $200 Engine Rebuild
Official Dual Carb Thread
Cylinder Head Quick Reference Sheet

[modok]

All of the "problems" mentioned so far can be fixed easily.

You can drill and tap spark plug holes bigger but it's real hard to tap it smaller

[mark tucker]

motorcycle,lawnmowder,japaneessee cars.plugs shouldent be that hard to find.I didnt have any issue. google?ebay? cb perf? hondashop?

[nsracing]

Longer 12mm plugs is the way to go. This gives more meat away from the seats.

Now if Pat can just move away the exhaust seat a few thousandths, that will be golden. We can really 'open up' the heads for some really big valve combos.

How about it Pat? Is that a possibility in the future for the Type I application or Waterboxer?

[mark tucker]

ya move the intake toward the center and upward (higher in the bore)and the ex toward the center and downward (lower in the bore)...and cant then a tad.... I think what he has hear is a great new head. I dont see a twisted head in acvw's future for mass production....althought it should be

[vwinnovator]

I wish someone would make a nice compact overhead cam set up, so we can swap cams at the track...

[modok]

You mean a subaru? just kidding. (but they do have same bore spacing, so......you could)

[theDrew]

[sled]

Pat, are you still watching this thread?

do you have any more builds to share with us where you have used this head?

how versatile is this head? many people run 40x35 on small engines like 1776's but most people believe they need 42x37 or even larger on 2200 and up. Can this head be used out of the box on a spirited 1776? with the conservative port volume and high intake velocity, it should work relatively well and not sacrifice too much low rpm performance? With that, you have also used these heads on large engines and made very impressive numbers. With the ever-evolving technology of head design, are we seeing that huge valves and big carbs are less needed for high performance STREET heads? obviously a 40mm intake valve has a limit to how much air can flow past it (unless of course you keep lifting it, but this is not practical) so for much higher rpm applications bigger valves are needed? In real world street driving, how often do people shift gears at or above 7000?
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drive your split.

[Pat D]

[jfats808]

Sales on these heads must've skyrocketed. Flow numbers and engine build combos to compare . Affordable off the shelf heads with great flow numbers as cast. Easily putting out near power numbers of what a 42 valved head would do. Next ground up engine that I get to do without a head choice, I'm going to give this one a whirl.
This is a perfect small cc performance build or bus engine build head in my eyes.
Keep the tech details coming. Need a samba member to build with it with their example and post what they can pull from it. Who's it gonna be ?!
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2276 IDA's 86C 11-1 DD !
2017 48 Trijet DRLA's W125

[Pizza Eater]

Hello Mr Downs,
Do you have dyno numbers for these heads on a 2110 with a 2288 (K8) cam?
How about a 2292 (FK-10) cam?
Thank you for your time.
-Jeff