Anyone get their Holley Intake on yet??
JET
I'm going to be broke for awhile since I have to pay for a new motor, so I doubt I'll be shopping for one of these intakes anytime soon. Looks promising, though. I'm eager to see some results from folks swapping the LS6 intake out for a ported aluminum one.
<strong>The one big problem with this intake is going to be heat soak. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Have to disagree with you, the heat soak theory is misunderstood, when you throw a bag of ice on an intake you are cooling much more than the intake, like the heads and the water in the jackets. An aluminum manifold cools down very quickly, the upper end of the engine takes a longer.
The real flaw in this theory can be seen by examining flow rates. it takes some time to heat up air, it cannot be done instantaneously. Air does not stay in the intake at WOT long enough to heat it up substantially. If an engine flows 800 cfm at WOT, and the intake has less than 2 cf of volume (real world is more like 1) you have 800/2 or 400 changes or air per minute. That is 6 changes of air per second.
I can see the only way to prove this once and for all is to run insturmented tests of 1) air temp rise going through a manifold in real world conditions and 2) effect of icing down the upper end of the LT1 engine e.g. heads.
LS1's just don't exihibit 'heat soak' but it is there - people throw a bag of ice on an nylon (insultating) manifold. Redirect the cold somehow to the cyl heads and exhaust manifolds and you'll se an LS1 gan .2sec as well.
<small>[ March 14, 2002, 09:29 AM: Message edited by: DaveSchott ]</small>
moving to bolton section <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
The Best V8 Stories One Small Block at Time
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong>I heard the Holley intake is actually 30 lbs, can anyone confirm? That's substantially heavier than stock.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
Jeff <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
<small>[ March 14, 2002, 04:17 PM: Message edited by: BADZ ]</small>
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong>I heard the Holley intake is actually 30 lbs, can anyone confirm? That's substantially heavier than stock.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
This could really be considered an INTERNAL mod.
<img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
An aluminum manifold cools down very quickly, the upper end of the engine takes a longer.</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Gotta disagree with you there, big time. If I shut off my LT1 and come back an hour later (even with the hood open) and feel my intake, it's still got a ton of heat in it, enough to burn my hand if I held it there long enough. As soon as you open the hood on an LS1 and feel the nylon intake, it's almost cold to the touch, it never gets hot unless you idle it for long periods.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
I can see the only way to prove this once and for all is to run insturmented tests of 1) air temp rise going through a manifold in real world conditions and 2) effect of icing down the upper end of the LT1 engine e.g. heads. </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have proved this quite often with my previous LT1 car. Cool the car down for a good long time (even without ice, just sitting with the hood open for instance) and it would run 13.5s. Run again right away, and it would slow to 13.7s to 13.8s. With my LS1, with it's nylon intake, I could run all day long and it would never slow down a bit. As a matter of fact I once ran the car 30 times in two hours, barely shutting off the engine at all, and it ran 13.0s to 13.1s all day long except if I screwed up a run. MPH was consistently in the 108s. Do that with an LT1 and watch the mph drop like a stone.
Mark
<small>[ March 16, 2002, 09:10 PM: Message edited by: Elite_Hot_Rod ]</small>
The Holley intake is so new I don't know if you could say there is a "standard" fee. Craig quoted me "about $100.00 bucks" for port matching and polishing but since they haven't done many it could be higher, we'll see. I think it all depends on how far you want to take it. If you go full tilt it will probably be much higher, I just told him to get me some good flow.
Mark
<small>[ March 16, 2002, 11:55 PM: Message edited by: Elite_Hot_Rod ]</small>



