HioSSilver

iTrader: (8)

I hope we see some more real world testing on these runners soon. To me if you're gonna cam a ls you should be looking for 7k+ shift points.

Hardcoresoldier

iTrader: (2)

On the track, once I launch I won't see below 5,000 RPM....Shifting between 7000 - 7500 would put me back down to 5000+ after the shift. I am holding out hope for the mid length runners as they fit my RPM range perfectly. Guess I will see how well they hold up on a boosted car lol.

Hardcoresoldier

iTrader: (2)

apparently the new runners are now available and in stock at a few places....roughly $350 a set....wonder when the manifolds will be available with them....I would really rather not get the intake and the runners separately....

1970camaroRS

iTrader: (8)

Says the runners are for LSXr and rt. Cool, I have the rt. Says LS3 port only. Not cool. But, I'm confused since the rt manifold only comes in Cathedral port.

HioSSilver

iTrader: (8)

You know i thought that when they were including the rt.....odd

joedude02

Anyone pick up a set yet? So, from what I understand these will not work for cathedral setups?

Hardcoresoldier

iTrader: (2)

I am planing on picking one up, but probably not until fall. To even use it I will need to change out all my direct port nozzles....Plus I need new seats, 5pt harnesses, a cage, and 'chute first haha

KW Baraka

iTrader: (7)

Damn straight!!!

KW

KW Baraka

iTrader: (7)

I'm not 100% sure they're available.....right now.

KW

Mercier

iTrader: (15)

FYI, just received a FAST 102 configured with the "High HP(mid-length)" runners. So the thing exists to buy as an assembly without having to spend extra on separate parts.

KCS

iTrader: (20)

Nice, I should be getting mine this week. I got the medium length runners too.

HioSSilver

iTrader: (8)

Be cool to get some real world feedback on them.

JakeFusion

iTrader: (7)

Nice... lots of excellent LS3 heads but the manifold issue... resolved maybe?

The Alchemist

iTrader: (19)

Ideally, to take advantage of those shorter runners, I think you really need to be spinning the motor north of 7000, maybe even 7500. I think this would be a hot ticket with a destroked 6.0l motor that could spin to 8000rpm.

Steve Morris tested them, and I think it wasn't until about 6000 that they made more power than the longer runners (don't remember the exact rpm).

Mercier

iTrader: (15)

I'm planning to spin a 6.0 bottom end with CNS LS9s and a medium-ish solid roller about 7500. I think this(mid-length runners) will work well but we'll see in the next 30-ish days.

Rise of the Phoenix

iTrader: (27)

The medium length runners make perfect sense to me, especially if there is no loss in lower RPM power. Why not take advantage of them and make some more steam up top.

JakeFusion

iTrader: (7)

Well on a 418 they seem like they'd be perfect. A lot of those are dead at 6000.

SoFla01SSLookinstok

It really does come down to the combo. On the test, Steve Morris, it showed a definite lower rpm power loss. I think it was anything below like 5700rpm was down from the long runners. This was also on a boosted motor.

Mercier

iTrader: (15)

I got a case of frowny-face when I saw he was testing high-RPM runners on a 6000-6300RPM setup. I know that boost changes the dynamics quite a bit but he makes note of needing more cam through the video. I guess this seemingly unbiased attempt at a test is better than nothing or FAST's test that didn't even include the standard/long runners.

But to cut the runner length in half and not change the cam or tune? Waiting patiently for more folks to get their hands on these..and me to get my grubby hands on my spinning bits from the machine shop.

Mavn

iTrader: (3)

Do they make them for Cathedrals yet?