1989GTA

Sounds like a real nice motor in the making. Do you have it together and if so any valve cover issues with the T&D rockers?

RX-Ben

iTrader: (7)

I called them yesterday, they said they were trying another intake runner iteration, sounded like they would be testing it soon. And then ~60 days until they go on sale, assuming they are happy with the test.

NAVYBLUE210

1989GTA
Spoke with Patrick yesterday, he said there was room for a 2" tall
valve cover, at most one would need to slide the coil pack down
One bolt towards the fender. I am really Stoked!

1989GTA

That is very good news. Forward with the project we go.

JimMueller

iTrader: (9)

I hope this VRX does better than the Airforce vs Fast102 results posted on Corvette Forum. For the F-body with an LS3, what about the throttle/cruise bracket provisions, MAP sensor location, fuel rails, etc... what else do we need to integrate it? Do you need a 102 TB, or will a 4-bolt 92 mate just fine?

The Alchemist

iTrader: (19)

People need to understand that an intake manifold can't magically make extra horsepower, it can only allow the heads to get the maximum air to the cylinder that they can flow. So if the heads only flow xxx cfm, and the cam is sized right, then if the intake manifold can supply the heads with enough air, then you won't see much of a gain going over to a different, better manifold.

Buuuut, add some cubes, better flowing heads, bigger cam, or boost, and that's when a better manifold will shine. People were upset that the MSD was 'only' 10hp better than the FAST 102, but that means it's the best manifold available currently. Throw 15-20 psi of boost at it, and watch that number go up substantially.

redbird555

iTrader: (14)

This is so true and its something people often overlook. If you have stock to mildly ported heads you wont gain much at all if anything going to a larger intake. A fast easily outflows stock 243 heads let alone stock 241's so going to a larger intake on something like that wont gain much of anything.

Case in point on the msd it gained 8hp over the fast over 6k, and even that is up for debate because of some of the fueling differences in the test. But even barring that it took a WCCH cnc'd headed 23x/25x ls7 to even see 8 hp. If people think they are going to get that on a stock cube ls1 with a cam and mild head they're in for a real surprise. If you have an engine like that either a fast or MSD is the best choice.

vararam industries

The VRX for the LS-7 has been testing since Dec. We can assure you of substantial gains in Both Torque and power over what you have seen from the Other Polymer manifolds. We have put the LS-7 up against the Carbon XR , OZMO , Kinsler,Holley and Fast . The VRX has dominated every test to date by strong margins in both Torque and Power production.
WE are testing on everything from a stock engines, to wild 7,500 RPM + engines. It has taken a substantial amount of time to bring together so many different engine combinations for this type of testing.
VR is taking the time to dial in the runner and plenum combinations correctly to ensure maximum Torque and HP throughout the power curve, not just a peak RPM HP number that is of little use.
The VRX for the LS-7 “IS” coming to production, along with a few other versions, anything else you hear or read is false propaganda to keep you buying parts that produce very little gain.
You will see independent test results once all of our dyno testing has been completed and all Patent protection for various components has been filed.
We are still set for early summer for the LS-7
VR Tech

redbird555

iTrader: (14)

awesome guys do you all have a date for cathedral versions yet or is it still "in the works" so to speak?

gmorris

There's gotta be more LS3's in the world than LS7's so is the LS7 first because it's getting the best results or....?

The Alchemist

iTrader: (19)

I've scratched my head of why you would go after the ls7 market first considering how small that market is compared to the ls3 and cathedral port, but I'm not in the industry.

miami993c297

iTrader: (6)

I guess from a marketing perspective it will be easier to sell for them after it will be establish there is a factual gain...and that will be easier to demonstrate with most of the LS7 versus son many other LS less in need of an "Intake Vacuum Killer" ...


Christian

dr_whigham

iTrader: (49)

I disagree.

What if the intake actually produced "Helmholtz Resonance"?

Resonance Tuning... the air pressure in the combustion chamber before the compression stroke is greater than the atmospheric pressure... an intake system that operates at a volumetric efficiency above 100%.

miami993c297

iTrader: (6)

Very well known in open wheel racing indeed...
Do you know if the VRX is at this level of development already?


Christian

1989GTA

I am sure that it is. That is why they are playing with the runner lengths and of course cross sectional areas/taper. From what I have seen it looks like they are shooting to get the best effect of the 3rd harmonic. The inlet radius to the runner will also have a large effect and they have been playing with that.

Great news from Vararam. Looks like around July 1 if not a little sooner. That will fit right in with my cash flow. Going for the LS3 version myself.

These are exciting times along with the LLSR from Cam Motion. Heck we could be talking 50-60rwhp or more from the both of them.

The Alchemist

iTrader: (19)

Point taken. After I posted I did think about the 'ram air effect' but figured I'd bite the bullet from anyone who mentioned it. Point being, that for an intake manifold to truly shine, the entire air tract from filter to tip needs to be addressed. I just think people are expecting to see gains like a cam swap generates, which isn't realistic.

dr_whigham

iTrader: (49)

I'll find out when they get in. At most I'd need thicker gaskets and lose the baffles. I'd MUCH prefer to just have a spacer welded to the valve cover though and keep the baffles in place. I'll play around with it when they come in.

I'm just saying what Patrick has stated... What if it did give similar gains?

Rise of the Phoenix

iTrader: (27)

Good information in here, and nice of someone from Vararam to come in and enlighten everyone. Looks like the Vararam guys paid attention in their business and marketing classes, unlike another company that is producing aftermarket polymer intakes.

drain89

iTrader: (13)

I agree! I think in NA 4th gen f-body applications the air cleaner has to be addressed. A poor fitting air lid that's bigger is still just a bandaid fix bottle-neck. It would be nice if someone would offer a redesigned base and lid that worked and was OEM quality.

JimMueller

iTrader: (9)

New intake manifold shootout posted, Vararam wasn't included though Edit: Crap, these are only cathedral ports.

http://www.hotrod.com/features/1507-...ifolds-tested/