Mongo

I see some good points being made in this. These cone filters appear to actually rob the car of needed cool air. <img border="0" alt="[grrrrrrr]" title="" src="graemlins/cussing.gif" /> I had this idea a while back to put 924 GTR headlights on my car that way I can make a heat shield and finish the ducting to the little niche where the pop up headlight bracket is on the driver side. This should provide the sufficient cool air I would need. But, I don't want to change the stock look I like already. <img border="0" alt="[nono]" title="" src="graemlins/nono.gif" />

Someone back there mentioned to duct into the front nose panel. On my 84 the space looks incredibly small to get a pipe in there, and I believe the panel is welded on for this year. I could be wrong...unless someone knows out there if they welded the panel on production date 3/84. If not then I'm gonna duct it into there and have the panel cut into a vented one.

But in order to get more air into this motor, what if I were to do an MAF kit and update the ECU to 85.5 along with doing a port match and polish on the head with cam? Would that make the sufficient power? I'm looking for 185-190 without touching the crankcase.

<img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />

Manning

The header panel should only be bolted in place. There are four or five across the top, then a couple on each side that you get to with the headlights up. Then the panel slides forward.

I think you missed the point Danno was trying to make though. You have to carefully engineer the process of increasing intake volume to prevent a drop in intake velocity.

One thing you most likely will not want to do is increase the intake port size. The intake port can act as a Venturi and help increase port velocity even though it might be perceived to choke off air flow. Port match, yeah, to keep the intake charge from stumbling over a lip (swirling air good, tumbling air bad), but that is about it. You also probably don't want to waste time polishing the intake or combustion chamber, since everything I have seen and read seems to indicate there is little to no benefit from doing this. Make it reasonably smooth, but don't get ****.

Mongo

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Manning:
<strong>I think you missed the point Danno was trying to make though. You have to carefully engineer the process of increasing intake volume to prevent a drop in intake velocity.
.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Oh crap, i totally overlooked that post! <img border="0" alt="[ouch]" title="" src="graemlins/c.gif" /> I don't want to port out too much. But, primarily I'd like to smoothen the intake and exhaust ports out because of those 'lips' so that i may get more even airflow. Preventing a loss of the venturi effect is my essential in my idea to push more air into this motor. I don't want a loss of velocity in this, in fact I think I'm getting that already I'll have to spend a little more time in the garage tonight after work to see what i can come up with...

<img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />

Skip

The header panel on the pre-85.5 cars are spot welded in place. While they are relatively easy to remove and replace with proper tools, it wouldn't be ideal to put anything there that may require attention - even for those of use with the quasi-removeable cover (for those who have removed it - you know what I mean) <img border="0" title="" alt="[Wink]" src="wink.gif" />

My opinion is that the area is very well suited for an air intake. It is well shielded from the hot parts of the engine compartment, has a plentiful supply of fresh air (no, not ram air - but you can't use that anyway), and is fairly protected from the outside elements (be very careful venting - water down the intake can be a quite "locking" experience)

Ram air would be great if you designed the whole engine, fuel, and electronics around it - but wasted on an otherwise stock car. And then, there's the issue of where the power band is.

Here's my feeble attempt at "good air":

<img src="http://members.rennlist.com/skipgrehan/Image26.jpg" alt=" - " />

More on that here: <a href="http://members.rennlist.com/skipgrehan/Airbox_mod.htm" target="_blank">http://members.rennlist.com/skipgrehan/Airbox_mod.htm</a>

S

Manning

Yeah, I guess I didn't make my point clearly enough. You can get the header panel off pretty easily (where are the spot welds?) but it is too much of a pain in the *** to make it practical.

I like the look of that airbox setup by the way. I actually have an airbox set up like that in may basement. You tipped me off to that design four years ago or so on the e-mail list. I should probably use it sometime.

DangerIsland

Hey skip, I never noticed this before on your car... is that pushed-in part of the in take boot (just before the throttle) something you "engineered" or is it just the way it worked out?

Skip

LOL - that's what happens when your car gets old It's since been replaced with a new'er one - that one suffered from long-term abuse and neglect from its PO - It was all but crumbs from the carbon buildup caused by a blocked CCV.

Congrats on the 951 - up for a Dyno session in Feb? Need to test some chips.

S

Mongo

I've come to a decision on the cone filter. <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" /> I'm going to see if I can perform an upgrade on my cold air design by fabricating a heatshield out of a thin sheet of particle board. It can be shaped easier and can also withstand high heats when sprayed with 1200F paint.

Next I'm going to have the long neck pipe made out of aluminized steel and welded to the adapter that I have on the car. I will powdercoat both of these when I fabricate a heat shield out of aluminum. <img border="0" alt="[thumbsup]" title="" src="graemlins/bigok.gif" />

and skip....you're sig...what is that thing? it looks like a mutated hamster <img border="0" title="" alt="[Eek!]" src="eek.gif" />

<img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />

Skip

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by EuroSpec944:
<strong>and skip....you're sig...what is that thing? it looks like a mutated hamster <img border="0" title="" alt="[Eek!]" src="eek.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Just some chick I once knew...