Y-BlocksForever Forum / Y-BlocksForever! Forums 2006 / Aftermarket Cylinder Heads / Testing results with ported Mummert aluminum heads / Latest Posts

RE: Testing results with ported Mummert aluminum heads

yalincoln — Mon, 30 Aug 2010 22:30:51 GMT

thanks ted

RE: Testing results with ported Mummert aluminum heads

Ted — Mon, 30 Aug 2010 06:10:26 GMT

[quote][b]yalincoln (8/14/2010)[/b][hr]anyone got an idea on how many cars will be at col. with aluminum heads, thanks.[/quote]I’m only personally aware of one car right now that will be at Columbus with the aluminum heads. It’s a street car and will likely be a tire shredder as it will be running street tires. Not mine and I’m not at liberty to say who it is. Just another reason for those who haven’t been to the Y-Shootout at National Trails Dragway to make that trek so they can see the new stuff first hand.

RE: Testing results with ported Mummert aluminum heads

yalincoln — Sat, 14 Aug 2010 11:17:25 GMT

anyone got an idea on how many cars will be at col. with aluminum heads, thanks.

RE: Testing results with ported Mummert aluminum heads

John Mummert — Tue, 10 Aug 2010 13:35:59 GMT

From looking at the graph it seems like there would be some nice gains in the front side of the curve. The Hp per cubic and the tq per cubic inch look respectable this early in the game.

RE: Testing results with ported Mummert aluminum heads

Ted — Tue, 10 Aug 2010 05:56:19 GMT

[quote][b]Glen Henderson (8/7/2010)[/b][hr]Ted, using these numbers, where would you have finished last year?[/quote]Preliminary dyno pulls with the aluminum heads adds 123.8 points to last years score which still isn’t enough to move the Y entry up any higher in the 2009 rankings. Even with the aluminum heads, the Y entry still gets beat out by the next best player on the list which was the Ford 427 SOHC. That entry was 210 points ahead of last years Y entry. Some more fine tuning in regards to carburetion and distributor curve is expected bring the score up some more though. Waiting on some more parts before continuing testing so time will tell.

RE: Testing results with ported Mummert aluminum heads

Daniel Jessup — Mon, 09 Aug 2010 17:56:26 GMT

Holy Ported Heads, Batman!! :w00t:

RE: Testing results with ported Mummert aluminum heads

Y block Billy — Mon, 09 Aug 2010 07:53:09 GMT

Great great great great great great Job Guy's.

RE: Testing results with ported Mummert aluminum heads

Glen Henderson — Sat, 07 Aug 2010 05:36:25 GMT

Ted, using these numbers, where would you have finished last year?

RE: Testing results with ported Mummert aluminum heads

John Mummert — Fri, 06 Aug 2010 19:06:41 GMT

Great job Ted! Your score at this year's EMC should surprise a lot of people:w00t:

RE: Testing results with ported Mummert aluminum heads

MoonShadow — Fri, 06 Aug 2010 10:19:36 GMT

Gee Ted how about a test on my "new" engine with the heads? :D Chuck in NH

PS: when your done testing the heads, now that they are "used", can I have them! :)

RE: Testing results with ported Mummert aluminum heads

bird55 — Fri, 06 Aug 2010 09:14:24 GMT

Hats off to this endeavor. It's been great to see it all unfold. Can't wait to see an hear what happens next!

RE: Testing results with ported Mummert aluminum heads

Don Woodruff — Fri, 06 Aug 2010 06:30:52 GMT

Very interesting, the RPM and torque ranges were not moved, just the magnitudes changed. Very little lost on the bottom end. Very neat. John has really done himself proud.

RE: Testing results with ported Mummert aluminum heads

Grizzly — Thu, 05 Aug 2010 22:05:06 GMT

Congratulations Ted and John,

Looks like you bumped the Y block to over 500hp By a bit :w00t: A big bit :cool:

Congratulations on achieving the goal of making a 500hp Y block.

RE: Testing results with ported Mummert aluminum heads

JJ — Thu, 05 Aug 2010 21:00:47 GMT

Congratulations Guys, well done.;)

RE: Testing results with ported Mummert aluminum heads

charliemccraney — Thu, 05 Aug 2010 18:46:59 GMT

Now that is more in line with the other engines. And it doesn't drop off after it peaks. It looks kinda like it's coming back for a little more as it approaches 7k.
I think we might start seeing na race engines in the 550 to 600hp range.

RE: Testing results with ported Mummert aluminum heads

Glen Henderson — Thu, 05 Aug 2010 18:45:44 GMT

525 HP and 480 ft lbs, that ain't bad at all! Drop it in the 56 and see how many heads you can turn. I got to get me a set of those. Great job John and Ted!

Testing results with ported Mummert aluminum heads

Ted — Thu, 05 Aug 2010 18:03:56 GMT

The ported Mummert aluminum heads have now been dyno tested on the 375” EMC engine and after the noise abated, was rewarded with a 52HP increase over the ported iron 113 heads that were used in last years EMC competition. Both sets of heads were tested on the same day to keep weather variables out of the mix. There’s still a bunch of tuning yet to do but this was a nice improvement for just a head swap and minimal tuneup work. Total timing for the iron heads was 39° while the timing for the aluminum heads is 32°. Distributor curve is currently the same for both heads but in looking at the data, the aluminum heads look to prefer something different in how the curve is applied. This will be worked out when testing starts back up. Shop temperatures were in excess of 100°F so consider this race day tuneup stuff. And remember this is still a street engine that’s running on 91 octane gasoline.

In the mean time, here are a pair of graphs which do more in telling the whole story in lieu of just typing out a bunch of numbers.