http://www.camaroforums.com/archive/...g-48767-1.html

I hope this isnt a problem with a majority of the minirams out there.

 

A problem with the installer. He came on here a while back with the same rant. 1204 miniram, 1206 heads. duh.. TPIS sells a 1206 miniram, that fits just fine.

The rest of us have perfect port alignment.

-- Joe

 

thats what i was thinking when i read that.... 1204 ports to a 1206, i didnt get why he would do that and didnt know the miniram had 1204 ports, i always thought they had only 1205 and 1206's

 

The doof just ordered the wrong one, then b****es to everyone about how it doesn't fit. Typical moron behavior.

The MR itself has LOTS of metal, as-cast. The "standard" version, IIRC, is machined to the 1205 size. For a small fee, they'll machine the ports to 1204 or 1206 size and location, or even Vortec - yes, there's THAT MUCH metal there.

For everybody smart enough to figure out how to do something right, there's at least one bonehead out ther dumb enough to screw it up somehow... and then complain about it, like it's somebody else's fault that he had his head up his rectum. Living proof about how you can't make something idiot-proof: idiots are just too clever.

 

I was consdidering getting the miniram but kept finding things about a design flaw that causes it to go lean on only a couple ports. It scared me from getting it and ended up with the superram. I wonder if this is just a common misconception or actually truth but I did find a few complaints about this.

 

What your saying is true, also with the LT1 intake. Thats why the LT1 bins have a cylinder trim to supply a bit more PW to those cyls that are normally lean.

But its not that bad.

-- Joe

 

i hear the stealth ram has abit of that problem too.

 

They all run lean on the rear cyls. Too much air, so to speak.

Talk to guys that design HVAC systems.

You'll find that if they have a "trunk" that feeds lots of "branches" (in a motor, we'd call that a "plenum" and "runners"), they make the "trunk" progessively smaller as it gets toward the end and has fewer and fewer "branches" left to feed.

That's the basic problem with all of those constant-cross-section plenums.... they should shrink down some between the front runners and the rear ones.

 

Hmmm. Having worked with HVAC in the past, I see exactly what you mean. I wonder if the HSR can (or should) be modified to reduce the cross section as it aproached the rear cylinders? Possibly an insert could be welded in from the bottom. Is the problem with the HSR bad enough to address?

IIRC the TPI plenum gets smaller at the rear where it goes around the distributor. I think it tapers down from the side view too.

 

I haven't seen any data on the HSR to know how severe its issue is, but I'd suspect that it would benefit from that. Only one way to find out.... or, for that matter, the plenum as a whole is pretty near about a no-brainer, doesn't seem like it'd be too hard to just make one.

 

Actually my experience is that the rear cylinders run fat not lean. Plugs 5,6,7 and 8 tend to be rich black. I have recently elimintated the open element breathers and went to a PCV system. In my opinion, the pcv system will help to add the necessary air for the rear cylinders.

I'll pull my plugs after a few hundred miles and see if it's working. Also, this tends to be a problem only at idle.

FWIW - On my motor, the Miniram outperformed the SuperRam. For some reason the motor never had a good second gear pull with the SuperRam. A switch to MiniRam helped me by .20 and 2 mph in the 1/4. This was not a back to back comparison. It was ET's from the fall with SR vs. spring with the MR.