Cascade Crew

iansane · Posted: Thu May 17, 2012 11:37 am Post subject: Iron Duke Awesome-ness?

http://www.nickariasjr.com/engine-blocks-gm-pontiac4.asp

Iron duke with an available LSx head bolt pattern? This is kind of cool! But obviously if I had 3k of disposable income to spend on a 4cyl, I would probably have other projects going...

Wonder what kind of reliable power could be made.

QwkTrip · Posted: Thu May 17, 2012 12:40 pm Post subject:

Just out of curiosity, how does that engine stack up to the Ecotec? I'm trying to understand why somebody would be interested in that old engine vs. newer?

Quasi-Traction · Posted: Thu May 17, 2012 1:33 pm Post subject:

the only logical reason I could see for this kind of development is maybe for a racing class to where there is a displacement limit regulation, but even so, I'm with Jon, to where, there must be better platforms that have already been designed, than to spend the time/effort/money into this.

just my humble $.02

Twilightoptics · Posted: Thu May 17, 2012 3:33 pm Post subject:

Is for fun. Like stretchy pants.

iansane · Posted: Thu May 17, 2012 3:39 pm Post subject:

Dewey316 · Posted: Thu May 17, 2012 4:24 pm Post subject:

jchaussee · Member Joined: 14 Nov 2010 Posts: 1318 Location: renton

Those heads are so flippin cool. Not the 4 cylinder buy the hemi heads for a ls block

Twilightoptics · Posted: Thu May 17, 2012 5:35 pm Post subject:

QwkTrip · Posted: Thu May 17, 2012 7:15 pm Post subject:

aaron_sK · Posted: Thu May 17, 2012 7:35 pm Post subject:

flea · Posted: Thu May 17, 2012 7:42 pm Post subject:

Quasi-Traction · Posted: Fri May 18, 2012 9:44 am Post subject:

Twilightoptics · Posted: Fri May 18, 2012 10:45 am Post subject:

There is no quench. The whole chamber is open. Which means you have to use a seriously domed piston to get any kind of compression. There are lots of further theories about heat loss and because of which insufficient fuel burning.

There is a reason hemi's went away - emissions, they burned like crap. Then once emissions technology caught up, they reintroduced a redesigned one.

Think of how much better and how much less timing the heart shaped chamber vortec design is to an open chamber 70s head design. Both still have quench.

In both the effective chamber is literally a top of a dome. Piston is usually flat or close to. Hemi and Dome makes a slice dome shaped chamber, also not good to burn completely.

They have advantages, when there is more than two valves they flow great and they resist detonation better than conventional cylinders. Hence why Top fuel cars use that style chamber - lots of boost.

aaron_sK · Posted: Fri May 18, 2012 5:06 pm Post subject:

Quasi-Traction · Posted: Sat May 19, 2012 12:38 am Post subject: