Cascade Crew

chevymad · Posted: Thu Mar 24, 2011 10:10 pm Post subject:

I think the rpm ranges are mainly for carbs. A dual plane intake increases the vacuum signal to each side of a carb. A single plane draws from the whole carb at once. So each cylinder can actually draw from all 4 barrels, instead of just 2. None of this really matters with TBI.

Dewey316 · Posted: Thu Mar 24, 2011 10:13 pm Post subject:

Yeah, it doesn't have the same effect on TBI. Since TBI doesn't need a vacuum signal, just a total vacuum reading, it won't effect the TBI at low RPM's like a carb.

The other advantage, is that single planes have a much larger plenum volume than dual planes. In EFI motors, plenum volume is something you want.

fiveoformula · Posted: Thu Mar 24, 2011 10:29 pm Post subject:

Cool, thats good to know. So no downside there? Just moves the torque curve higher?

Dewey316 · Posted: Thu Mar 24, 2011 10:31 pm Post subject:

it won't really shift it much, it will just not limit it as much. Wink

The real factor in the torque curve is the cam.

fiveoformula · Posted: Thu Mar 24, 2011 11:05 pm Post subject:

Nice! Thats why I bring my questions here!
One more, should I start finding a way around emissions, or will it still be possible to de-tune it enough to run thru Oregon DEQ?

Dewey316 · Posted: Fri Mar 25, 2011 12:35 am Post subject:

With a cat, and everything working, it should be able to clear.

Twilightoptics · Posted: Fri Mar 25, 2011 8:46 am Post subject:

Just don't let John go with you. He's cursed at Deq

Dewey316 · Posted: Fri Mar 25, 2011 2:34 pm Post subject:

fiveoformula · Posted: Sat Mar 26, 2011 4:39 pm Post subject:

Ha ok I'll keep that in mind. I have a hallowed out cat right now, I managed to pass last time by bumping up the idle and turning the timing way down. The guy got all mad at me because my air/fuel gauge didn't stay at 14.7 the whole time. Rolling Eyes

so i'll just cover it this time around.

Also I been talking to everyone I know who has built a smallblock and they keep saying i'll be disappointed if I go with a cam this small... course there running carbs and they aren't daily drivers, but this should be a pretty big upgrade right?

Dewey316 · Posted: Sat Mar 26, 2011 4:49 pm Post subject:

Well, when my motor was healthier, it put down 224hp to the wheels. So, that gives you an idea of what it might do. With just the cam, and stock heads, it was about 215hp. So it is a good 40-50hp gain at the wheels over a stock LO3.

iansane · Posted: Sat Mar 26, 2011 8:56 pm Post subject:

Twilightoptics · Posted: Sun Mar 27, 2011 6:36 pm Post subject:

Are they used to 350's?

Put a cam in a 305 it acts one way, put the same one in a 350 it acts smaller.

Vise versa. A small cam in a 350 will act like a bigger cam in a 305.

fiveoformula · Posted: Mon Mar 28, 2011 8:35 pm Post subject:

Thats what I was thinking... Yeah they had more cubes, one guy had a 355 and the other guy had a 400. They both think I'll be disappointed with the 211/219 cam

fiveoformula · Posted: Fri Apr 08, 2011 5:34 pm Post subject:

chevymad · Posted: Fri Apr 08, 2011 9:56 pm Post subject:

Those lunatis are the ones I was breaking. I think i'm using these now.
http://www.summitracing.com/parts/SUM-174000/Application/?prefilter=1

A little more closed pressure and less open pressure.

fiveoformula · Posted: Sat Apr 09, 2011 12:44 pm Post subject:

Wow, done deal, there even cheaper and come with retainers and viton valve seals, can't beat that. Smile

fiveoformula · Posted: Thu Apr 14, 2011 10:02 pm Post subject:

Well taxes came back! which means new parts for me! Here's the list...
http://www.summitracing.com/parts/LUN-60110/
http://www.summitracing.com/parts/SUM-174000/
http://www.summitracing.com/parts/SUM-226051/
http://www.summitracing.com/parts/TRD-2210/
This and getting my vortecs shaved .030"
im still wondering about head gaskets though, how do I pick the right thickness?

chevymad · Posted: Thu Apr 14, 2011 10:24 pm Post subject:

You need to know how far below the deck surface your pistons are at TDC. That number + the gasket thickness needs to add up as close to 0.040 as you can get it.

Dewey316 · Posted: Thu Apr 14, 2011 10:48 pm Post subject:

If it is a stock motor, chances are it is 0.025 down. So the .018 stock replacement gaskets are about right.

But, it never hurts to check.

Twilightoptics · Posted: Fri Apr 15, 2011 8:49 am Post subject:

Get the Felpro steel shim. I forget the part number it's like 1004 or something. It's a rubberized coated metal gasket. Then use copper coat on both sides of the gasket.

It's .015 which works perfect with typical stock .015 and they're readily available.