Dyno Results

[blueguy]

Leaving it along porting wise I'd agree as well, but for air atomization purposes, polishing would be a great benefit, inlet and outlet.

 

[BillBoost37]

LIM was ported and smoothed/polished up, wasn't it?

 

[blueguy]

Secret race mods.

Just like the intake side of the heads, you want the LIM to be a little rough.

 

[SnowFlake]

The LIM hasn't been polished or ported in any way.

 

[BillBoost37]

Thought that was the one you got off me.

 

[SnowFlake]

It's the LIM that was In my original motor. I gave the other LIM to Ed to give back to you.

 

[BillBoost37]

Oh..odd, I thought I had given you the one with the temp sensor in it. Looked like the same position I had it in.

 

[SnowFlake]

You tapped the hole for the temp sensor into my LIM when it was off the motor.

 

[matt5112]

Lim should be polished. Injectors aren't in the lim, but the head.

 

[SnowFlake]

How much power is a polished inlet and LIM really worth?

 

[matt5112]

Too many factors.

 

[SnowFlake]

With that being the only variable.

 

[matt5112]

Your blower might not respond to polishing. In theory it should help.

But that's just theory.

 

[Wotgtp]

I would assume a ported LIM would make a big difference. I can't comprehend why gm would leave that much material in the runner to the gasket. The only thing I can think of is that they wanted to insure in the most underkill nature to have the air go into the heads with no interference from the edge of them. However it lookied like you could port the LIM a 1/4 of an inch all around the runners and still not worry about porting the heads to match.

 

[matt5112]

Keeping costs down.

Cast pieces are less expensive than polished or cnc by far.

There isn't that much room for opening up the lim.