APillow

iTrader: (3)

Just an open ended question here. As the title states... What are the limitations to the Edelbrock RPM dual plane intake?

Yes, the big plus on the dual plane is the bump in bottom end / mid range torque over the single planes. So for a streeter this is a great combo! Especially for heavy sleds or auto cars.

But the top end suffers slightly in mild cams... How much of a choke is the RPM on LS6 / LS2 + types of cams that live and breathe most effectively in the 5500-6500 range?

Specifically, I'm debating a LS2 3 bolt into a 5.3 with the RPM manifold... But if it chokes out, I may have to stick with something lower in the rev range like a LS1 cam. For a truck I cannot give up the low end torque that the dual plane offers.

Thanks!

ZONES89RS

iTrader: (25)

They will pull to 7000 no problem.

windmill

iTrader: (4)

I went 6.8's with one,,, on a bone stock lq4... but could only turn it 5600,, it would fall off after that,,, but think the cam with the down fall...

speedtigger

iTrader: (16)

Yeah, and your cars weighs less than a half empty can of beer.

windmill

iTrader: (4)

if I had your motor speedtigger,,,, I bet I could run 6.0's too. mine is junk...lol that is on motor

Pop N Wood

iTrader: (1)

If you don't upgrade the valve springs then valve float will choke your top end before the intake does. There is a good on line article that does a dual vs. single plane intake comparison on a 5.3 with stock truck springs. The dual plane is clearly the better choice in that condition.

Now if by mild cam you mean not stock and upgrade the springs in the process, then the single plane has a chance to make a positive difference.

APillow

iTrader: (3)

7K I'm happy with that!!! Woot!

Good point I omitted. Spring upgrade for sure!!! I do not think the stock truck springs can take much more than 5700 even with the puny stock LM7 cam! LOL

Here is a good showing of this on a 5.3 HO crate build up. FWIW this is not the LS1 cam as Frieburger says it is in the video. I believe this is the L33 cam in the HO 5.3 which is barely good for 10HP. ( http://www.carcraft.com/techarticles...n/viewall.html )

Kingc8r

iTrader: (21)

I'll be following this thread as well since I have sold my LS6 intake and my motor is torn down...and I need to get a new cam as well so my options are fairly open.

ZONES89RS

iTrader: (25)

I pull all the stock LS swaps I have done to 6000 wether they were Efi or carbed with no valve train upgrade. Have seen ls6 cam swaps pull to 6500 easily.

1981TA

iTrader: (7)

I road race mine, and it hits the 6k area a lot and stays there for a few seconds on each lap. This is on a stock LS1 long block using the performer rpm manifold. Look for the videos in the build thread linked in my footer. The first shows how well it performed at Road America against a C5 about a minute in, and then a C6 about 6:15 in. Both passes were high-rpm and relatively effortless (don't take this as "I can kill a C6" - the second pass was done from about 100 to 130 while the other car did 100 to 110 or so) .

"Choke" if there was any, probably had more to do with the stock 241 heads or the cam. But I certainly didn't notice anything.