The NEW LE 220 Turbo Head!!! Pics within!!

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wrenchnride247
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Post by wrenchnride247 » Thu Aug 17, 2006 10:43 am

Very nice work guys. Is this the Massive 'Vert heads were seeing? If so Dyno Day will be the event too catch in '07.

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type3
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Post by type3 » Thu Aug 17, 2006 11:10 am

Steve Arndt wrote:I thought that you were looking at using the square port casting flange...
The square port AMC castings are a bit hit'n'miss so don't lend themselves to the planned CNC process. So they use the oval heads to convert to a round port. Pretty cool stuff. :)


cheers,
type3

MASSIVE TYPE IV
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Post by MASSIVE TYPE IV » Thu Aug 17, 2006 12:13 pm

Steve Arndt wrote:I thought that you were looking at using the square port casting flange on the exhaust because of more sealing area. Is that only when dealing w/ a non welded head for a more mild application?
we have gotten away from the square ports for developments. Len found inconsistent ports that created issues...

Just because we are working with something does not mean we will be staying with it-

Len, The Mighty Spyder made 257 HP, your dyslexia is in full force today!!LOL

HAM Inc
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Post by HAM Inc » Thu Aug 17, 2006 12:38 pm

The sq. ports are a lousy choice for a turbo powerplant. A couple of reasons for this. One, by the time we open the port, the port wall gets pretty thin, this leads to a poor seal, and cracks in the port wall as the extra length of the sq. port sees very little cooling airflow. The issue Jake was referring to about inconsistencies is related to the casting seam that runs down the middle of the ex. port. Never knew what to expect from the OUTSIDE of the port. Some were nice and smooth, others were sharp and rough, which served as some pretty serious stress risers. Not a good situation for an aircooled ex. port. We got some fabulous results from our sq. port r&d, but I am now focusing all of my ex. development on the oval based heads.
Just a little aside while we are on the subject of exhaust. I have not seen any need to move beyond the oval port on displacements up to 2316 N.A. The flow balance of the heads is readily maintained for every application Jake has thrown at me to date. It's important to keep in mind that flow %'s over 75% on a N.A. apllication suck the low-end and mid-range torque out of an engine, any engine. The latest NHRA Pro-Stock engines are running flow %'s in the low to mid 60"s. I have prepped A/X heads with 65% and gotten reports of overwhelming, neck snapping response and acceleration.
Jake after I made that post this morning it dawned on me that the HP I posted was high. And my math was off too!

MASSIVE TYPE IV
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Post by MASSIVE TYPE IV » Thu Aug 17, 2006 12:56 pm

wrenchnride247 wrote:Very nice work guys. Is this the Massive 'Vert heads were seeing? If so Dyno Day will be the event too catch in '07.
Nope, those are not Beth's heads... These belong to a customer :-)

Dyno day will be VERY interesting in '07!

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Ephry73
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Post by Ephry73 » Thu Aug 17, 2006 1:05 pm

Oh mY Gawd! wow! Ok, so the round exhaust port, please tell me more about the sutbbies.


E

MASSIVE TYPE IV
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Post by MASSIVE TYPE IV » Thu Aug 17, 2006 1:09 pm

please tell me more about the sutbbies
Thats all Len.... He can tell you all about them!

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Can Drive Soon
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Post by Can Drive Soon » Thu Aug 17, 2006 1:28 pm

MASSIVE TYPE IV wrote:If the AMC head castings become unavailable and we were forced to make our own castings we certainly would, but I do not see it happening.
I can build you a furnace :twisted: .
MASSIVE TYPE IV wrote:Getting all that heat out of the exhaust port is certain to help with the heat that is soaked into the head in that area- heat that isn't soaked doesn't need to be dissipated...
Now if we could only find a fuel that puts out the same or more energy, starts in the cold (no straight ethanol) and burns cooler......

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type3
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Post by type3 » Tue Aug 29, 2006 6:52 pm

Well what can I say? The heads arrived today and I'm simply blown away! :D Thank you so much Jake and Len! They are exactly what I wanted and needed for my project and yet so much more at the same time. Simply stunning. Thanks again guys. :D


cheers,
type3

MASSIVE TYPE IV
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Post by MASSIVE TYPE IV » Tue Aug 29, 2006 7:02 pm

Excellent!!
You have the originals of the 220 series, Len put MUCHO time into those!

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type3
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Post by type3 » Tue Aug 29, 2006 7:07 pm

MASSIVE TYPE IV wrote:Excellent!!
You have the originals of the 220 series, Len put MUCHO time into those!
It certainly shows too. Fantastic result. :D


thanks,
type3

MASSIVE TYPE IV
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Post by MASSIVE TYPE IV » Tue Aug 29, 2006 9:02 pm

Wait till you stack some boost in those chambers!

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Ephry73
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Post by Ephry73 » Wed Aug 30, 2006 8:41 am

The more I read this post, the more I have to thank Len and Jake. I still wonder about the stubbies though, and how much more improvement there is in using D intake ports as opposed to the round ports.

Keep up the amazing and inspirational work guys. This is amazing.


E

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type3
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Post by type3 » Wed Aug 30, 2006 9:25 am

Ephry73 wrote:I still wonder about the stubbies though...
What sort of info you after? After seeing in them in the flesh all I can say is:

a) Len's Tig work is flawless.
b) The stub pipes are bigger than the pictures really show.

These suckers are gonna flow! :lol:


cheers,
type3

HAM Inc
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Post by HAM Inc » Wed Aug 30, 2006 9:38 am

Ephry I've seen a solid 10% improvement in flow going to a properly designed D-Port with a given valve size.

Type3 I am so glad you love your new heads! I appreciate the patience you displayed while these bad boys were being developed. You definitely have a better product as a result.

I would love to take the credit for the beautiful TIG work on the stubs, but that is the handi work of my neighbor Chuck Manning of Tarmac Motorsports. I designed the stubs, but didn't have the time build them so I enlisted Chuck. He is a very gifted fabricator and his custom sheet metal work and exhaust systems are beautiful. The aircooled world will be hearing a lot more out of Chuck in the coming months. He is an integral part in the H.A.M./R.A.T. F-Prod 914 currently under construction for the 2007 season.

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