Rich, sit on my couch cause I'd like to peek inside your head for a bit.

You "don't get the whole concept" of doing this on an LT1..... yet you DO get the concept of force inducting one, spraying a little nitrous to it along with a touch of water cooling to top things off?!?!

So it's OK with you to do that to an LT1 in search of 800+rwhp but it's not feasible, in your eyes, to swap a set of heads and try to reach say 500-550 at the rear wheels?

CamaroGuru,

Not the same auction... the one I mentioned was maybe a month ago but this one shows exactly what I'm talking about. Obviously someone bought all this stuff to build a big ci 18º headed FI street motor. Probably ran out of money or ran into other issues (we've all been there). Definitely a buyer's market with this kind of stuff but there ya go.

Good luck.

-Mindgame

MG: it's just a preference, not based on logic. I am not trying to convince anyone, just expounding. Maybe I am not understanding what people are trying to achieve. I see "exotic" heads as a way to build a high rpm NA motor. By the time you make your LT1 block suitable for this, you have spent enough to pay for an aftermarket or Bowtie block. You also have to get rid of the LT1 intake and probably the engine management system as well. So, why stay with the LT1 and it's limitations?

On my combo, I certainly also spent enough to have paid for an aftermarket block. But I was able to use the stock PCM, an LT4 intake, run of the mill exhaust system, and most of all keep all the emissions equipment in a functional state as well as all the factory accessories like AC and power steering, etc. My goal was a car still very recognizable as an LT1, and in fact one that was largely indistinguishable from the outside. In other words, just a preference but one backed up by an idea of what the end result was going to be. I am just not clear from the context on what the goal of the "exotic" heads guys is. My best guess is that it is to have as fast an NA car as possible. If I wanted that I'd go for a big cube shortblock to really use those "exotic" heads. Of course, what's interesting about the 18X is that they are not quite completely exotic because they can use standard valveterain parts.

Interesting discussion nontheless.

Rich

I agree with what you said about spending the moolah on 23* castings. If you're building a max-effort race engine, you're not going to restrict yourself to a 23* head UNLESS it's mandated in the class you run (or you take a heavy penalty for a shorter angle).

Just to beat the Little Chief horse some more, they come w/ some small chambers (34-50cc) which would make lowering compression a little more difficult. With the cross section size of the ports, you'd have to move a "****load" (official term there) or air to make it worthwhile. Now, I get big hearts in my eyes like everyone else when you see an intake flow number over 400 for a SBC head, but that's also @ 9000rpm and w/ a 315cc runner. For a nitrous or NA motor, these things are some serious chunks of aluminum. Once again, I when i see "Special Dart Iron Eagle or Aluminum w/ relocated lifter bores" in the spec sheet.

I like this topic. One of the more interesting I've read on CZ28 in a while.

Flatlander has the 18x's for a fairly good price:

http://www.flatlanderracing.com/head...x-chevy11.html

I like that "bare" price too

Hey that's not logical Rich. *Mr Spock ears on now*

We're in some sort of agreement on the aftermarket block thing but I can also see the side some of these guys are looking at in staying with the stock block. If everybody built the same thing it'd get real boring wouldn't it?

Mongse,

You can get the static comp to ~12.25 with a 20cc piston and .040 deck height using the 50cc head. That's not too bad if you stick enough camshaft to it. Then again, even a minimal cam to get things where they need to be is going to push a 427 to ~7000 rpm. But hey... that's just about where I like it.

Yes... this has been a good thread...... even if it makes Rich sit back and think to himself.... "Those dumbasses".

-Mindgame

Wow... must have made a hole in the "filter".

-Mindgame

You have made a discovery

Rich

MG has some pics in his e-mail.... if someone wants to host 18X pics.... speak up.

I've been looking at these heads for a while now. I'd love to stick them on my turbo S10 build and see what they would do, and for the $1300 dollar price of the bare heads, it seems like it would be feasable (if I sell my darts).

Anyone know how these heads would stack up to some of the SB2.2 heads people have used on LT1s?

Bret, I can throw those pics up on my webshots account if you want.

ChrisGainey@bellsouth.net

You have mail boss.....

Bret

This should work.

http://community.webshots.com/album/327970687pQqHNE

you beat me to it, ive been sitting here trying to load them to my webshots for 45 min or so but my computer sucks, lol


Bret thanks for the pics, you really like using that bench in front of your shop dont you, lol.. (i still got that vid when we were sitting there watching that hot girl at the gas station, watched it the other day it was pretty funny still lol)

thanks,
-john

Excellent pics Bret... ever think about photography as a side job? It'd be great to see pics like that of some of the more extreme heads out there.

The pics of the intake ports give a much better image of what has been said about the pushrod interference issue... how much material can be taken out from that part of the port?

Kinda helps when you basically MAJOR in photography in college......

Yeah Yeah Yeah don't ask.

That bench is the place for the best light for pics so it gets used often. Sad thing is the gas station next door is closed so no more girls to ogle at.

No clue how thick the pushrod wall is.

Photo 6 shows how tall that SSR is on that thing.

Bret

Right click, Save As..

I'll throw them on my site for safe keeping too. I've been saving all of Dave's SB2.2 stuff too.