What are these wretched abominations?

[Ironriot]

Seeing as they have confused Nessism and TheCafeKid they've really got me wondering.

Sorry it looks bad. I had to draw it in Paint to explain what was going on here. Its a rendition of the intake boots and the intake manifolds that bolt to the head

Well their story is that they're not normal. Ness has pointed out that regular boots are molded to the intake manifolds, which in turn bolt to the head. Mine are two seperate things. As you can see in the drawing. I know NeroBro has the same kind of set up but what the hell is going on here? They're confusing people left and right and they're making me wonder. Just what exactly are they? I'm thinking maybe it was just a special thing to '81?

And as for the picture. Basically that's exactly what I got BUT the raised edge of the intake manifold is very short. Not as long as the picture depicts it to be. I'm talking about 1/4 of an inch long. And the obvious question is what holds the intake boots on there securely? I'm guessing that its the pushing force that the airbox puts on the whole intake system. Either way anyone got any ideas?

 

[PAULYBOY]

Could it be thatwhat was once one bonded unit has now become, due to age and heat, 2 separate entities? I have a rack of carbs sitting around with three out of four of those same notched boots still clinging to them. Or maybe it was just certain years/models?

 

[SPARKSS]

I don't know what breed that setup is, but if I was going to use it, I would NOT depend on the airbox to hold it in a sealed manner! Search out some high temp sealer that's flexible.......Both GM and Navistar use a gray compound to form gaskets on many late model engines that's TOUGH and will withstand heat. Is there a larger O.D. lip at the inlet end of that raised section? If so, you might also try a narrow (oem style) clamp there.

When you're done trying something like the above (or some other method of bonding), TEST IT......bolt it to a plate with a little sealer (or o-ring if used), stand it vertically and pour some thin liquid into it and gently try to unseat the boot. If it were me doing this, I'd even let that stand with gasoline in it to verify that this wouldn't ruin the seal.....maybe rig a cap and pressurize with a few psi of air AND/OR 25" HG vacuum to simulate pressures ranging from a backfire pulse to closed throttle at high speed.

for what it's worth.

 

[Nessism]

My guess is that those are the regular rubber boot that has come unbonded from the aluminum flange. There is no provision to clamp them in the front so no way they would seal if they were supposed to be seperate pieces.

BTW, your package is on the way.

Ed

 

[Ironriot]

I don't know what breed that setup is, but if I was going to use it, I would NOT depend on the airbox to hold it in a sealed manner! Search out some high temp sealer that's flexible.......Both GM and Navistar use a gray compound to form gaskets on many late model engines that's TOUGH and will withstand heat. Is there a larger O.D. lip at the inlet end of that raised section? If so, you might also try a narrow (oem style) clamp there.

When you're done trying something like the above (or some other method of bonding), TEST IT......bolt it to a plate with a little sealer (or o-ring if used), stand it vertically and pour some thin liquid into it and gently try to unseat the boot. If it were me doing this, I'd even let that stand with gasoline in it to verify that this wouldn't ruin the seal.....maybe rig a cap and pressurize with a few psi of air AND/OR 25" HG vacuum to simulate pressures ranging from a backfire pulse to closed throttle at high speed.

for what it's worth.

If I was gonna stick with them I would test them, as per your recommendations. But they're completely useless as they have cracked in half. Thanks for the tips anyways

 

[Ironriot]

Well the concensus is that they've become unbonded from the aluminum. But I still find it wierd that NeroBro has the same kinda set up. Either way enough with these wretched things. Only thing to worry about is waiting for the parts to come from Ness.

BTW Ness, I'll let you know when they get here

 

[paco13]

Those are junk. You need new. They are suppose to be one piece.
So are you saying you are waiting for another used set to come that are the same "set up" as those. If so don't wait for them order new intakes and save alot of head aches.

 

[Nerobro]

What do you mean I have that kind of setup?

Those are broken intake boots. The rubber has come debonded from the aluminum flange. it's time for new ones.

 

[Ironriot]

Yeah we've figured that out. I mean you have the same kind of set up because your boots look the same as mine. Most everyone else's boots are bonded to the manifold. Like completely covering it, by the looks of it.