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COOL ARTICLE >> FAST’s interchangeable runners push horsepower ceiling << COOL ARTICLE

Two new state-of-the-art runner sets build upon our patented removable runner design. LSXR 102mm Intake Manifolds from FAST now have the capability to shift torque and horsepower gains to a higher RPM than the original version, making them the most flexible options on the market.

High HP and Race versions are now available. These manifolds and complementing runners are designed specifically for LS3, L99, L76 and L92* engines that are built for high-performance applications. The High HP Runner Set is based on Daytona Prototype intakes and utilizes newly designed runners. They are shorter and straighter than previous market offerings, specifically to improve high-RPM horsepower and torque in vehicles with added performance modifications. The High HP version has been proven to make 20+ additional horsepower over the original LSXR manifold with a 500-1000 RPM shift up in peak horsepower on LS3 performance engines. The Race Runner Set features a short and straight runner design that rivals aluminum four-barrel intakes for horsepower potential. This manifold setup utilizes a race runner engineered for all-out high-RPM performance. It is ideal for vehicles with serious performance modifications and race converters. The Race version provides a 35+ horsepower gain with a 500-1000 RPM upward shift in peak horsepower for all-out race vehicles.

The runners are interchangeable and available in kits so manifolds may be configured as the original LSXR with standard street runners, or the new High HP or Race models. FAST LSXR Intake Manifolds are available in a popular black finish and are compatible with all FAST Big Mouth Throttle Bodies and fuel rails.

*L92 requires engine accessory modifications.

Standard runners can be used w/ stock or mild vehicles; High HP & Race runners are shorter & straighter than conventional to improve high-RPM HP & torque

High HP option makes 20+ HP over original LSXR manifolds, Race setup makes 35+ HP

Interchangeable runners allow manifold to be configured as original, High HP or Race

FAST LSXR 102mm STANDARD Intake Manifold (GM LS3) - CURRENTLY AVAILABLE

FAST LSXR 102mm STANDARD Intake Runners (GM LS3) - CURRENTLY AVAILABLE

FAST LSXR 102mm HIGH HP Intake Manifold (GM LS3)

FAST LSXR 102mm HIGH HP Intake Runners (GM LS3) - CURRENTLY AVAILABLE

FAST LSXR 102mm RACE Intake Manifold (GM LS3)

FAST LSXR 102mm RACE Intake Runners (GM LS3) - CURRENTLY AVAILABLE


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Suns_PSD

I'd love to see if this High horsepower version of the FAST would work correctly on my small cammed 500 horsepower LS3. It's already proven that the standard one doesn't do much at all.
How about a third party Dyno comparison? I'll do it for some parts.

jesse82nc

I'm in the same boat. Until I see a real 3rd party dyno of this on a vette, I can't really justify the costs. In the video, the power is mostly lost on the Race one below 7000 rpm. It's very rare that any LS3 would see over 7000 rpm.

If I had a set of race and high hp ones, I would do some back to back testing against my current standard ones. My LS3 is already making 540 rwhp / 510 rwtq all motor. I have a friend with a dyno even and I am sure I can get some time on there as he would like to see the results as well. I just have a hard time dropping $650+ for both sets to do the testing.

BLWNGTO

Went to your site but it says the race runner versions and High HP versions are unavailable

Suns_PSD

I wouldn't bother with the race version.

How the heck do you make 540 rwhp on an LS3? Are you the guy with the 13.5 compression on E85 only? That seems really high.

I think you have enough money in your engine that you should test the high hp version. If you don't like the results just sell it before posting the results and you won't lose but $250 or something.

jesse82nc

It's at 12.25:1 currently. Stock heads. When I get some Trick Flows later this year I plan to bump that up to about 13:1. Should be pretty close to 575-600 rwhp all motor. Check out my build thread in my sig for more details.

I wouldn't buy these runners until someone shows a proven gain on a dyno back to back at under 7000 rpm.

jesse82nc

Any real world dyno numbers from anyone who purchased these runners then?

Suns_PSD

Colorado Speed, I sent an email out about 2 weeks ago requesting pricing on the Hi-HP version to you guys using the link, but never received a reply.

Could I get a quote sent to TX? Repeat customer here!

Thanks

Suns_PSD

Pretty positive I purchased a new Vararam from you in August-November of 2015.

Yes, you were $160ish higher than RDP on the Corsa exhaust. I'm not a real stickler on price but that was enough to care.

I'll also add that I see where you can buy just the High HP runners for something like $323 but when I click on the link for a new FAST that includes the High HP runners I do no see a price.

Good luck!

KW Baraka

Same here.

FAST released test results on these runners and the race runners didn't really shine until real close to 7000 RPMs.

Not really suitable for everyday street driving. Well....they ARE "race", afterall.....

KW

C6RAPTOR

Why is it that FAST has not tested the intake with the short RACE runners on a high HP LS3 race engine??
I have a TPIS built 416 12.4:1 CR solid roller cam, 380 SCFM @ .700" heads, 650 HP at 6500 RPM engine in my track/street Corvette. I am using a ported LS3 intake & TB.
This same engine with a sheet metal TPIS intake will make near 740 HP at 6900 RPM. I would use the TPIS intake if it fit under the hood of a C6 Corvette. About 80 SCFM more air flow is needed on my engine to duplicate the HP . I know this because I have the dyno test data from both engines being tested with both intakes showing air flow .
Do you have any air flow data for the intake using RACE runners?

C6RAPTOR

I have called and they sent me a test video that they seemed very proud of where they tested the new runners on a stock block LS3 with a cam that would allow the engine to rev to >9000 RPM and it showed that it produced more HP above 7000 RPM. Mind you , stock crank, heads & pistons. I asked how long did they expect this crazy engine to last. If you install a cam that will let the engine rev to 9000 rpm it will make hp .

I know that FAST must be smarter then that.
Is it possible that my BER ported LS3 intake that makes 650 HP on my 416 CI TPiS engine is still the best intake solution for a Race LS3?

LATE BREAKING NEWS FROM FAST:
Last week FAST sent me info on a user of the RACE runner intake being used on a real drag race LS3 that also used nitrous . No NA HP numbers for the engine. I would expect a race LS3 with a 200-300 HP shot of nitrous to make HP with any intake manifold . FAST was very proud of this information that they were providing .

C6RAPTOR

It sounds like you are in the same arena as I am with your LS3.I have WCCH stage 3 heads and I am at 12.4:1 CR in my TPiS 416 CI 650 engine HP engine

I will check out your build thread.
Last week after much research I ordered a FAST LSXR with High HP runners.
Some of my research included flow tests by WCCH showing that the LS3 intake has its limits far below the Stage 3 heads flow of 380 SCFM at .700" lift. I also found test by RPM Motors one other head porter that showed that the FAST LSXR used with their ported LS3 heads would flow 370.5 SCFM.
I ordered the intake and 102mm NW TB from WCCH who agreed to port match and clean up the runners to match their heads.
It will be a few weeks before I get it all together and get a chance to dyno tune the new combination .
I found this old thread by RPM Motors that shows flow test results of the long runner LSXR.
https://www.corvetteforum.com/forums...w-results.html

ChrisUlrich

Has anyone seen any numbers for before/after with this intake? LS3 vs the "middle length" or "high hp" FAST 102mm intake?

C6RAPTOR

I will be doing a dyno tune in a few weeks on my LS3 with the new FAST intake. I am waiting for the snow to melt so that I can get my trailer out of the snow bank so that I will be able to haul the car to the dyno shop .
I have a feeling from the research that I have done that the intake will be able to pass more air flow then my ported OEM LS3 intake at the upper end of the RPM range.
In other words, in my opinion if your LS3 engine with >416 ci has heads, cam, exhaust and injectors sized to make higher then 600 HP the new High HP runners in the FAST LSXR intake will make more HP then the OEM intake. If you have an LS3 that is only capable of 550 HP stick with the ported OEM LS3 intake.

I could not wait any longer to drive the car after the new FAST with High HP runners installation . I have no numbers to offer as of 2/23/2017 but I am very happy with the seat of the pants test I just did on the road. I did not feel any low RPM power loss that I was expecting compared to my ported LS3 intake and WOT was unbelievable. One thing that I would like to add to this discussion is what mods were made to the FAST High HP runners before I installed the manifold . First I had WCCH port match the runners to my WCCH stage 3 heads. The other thing that I did was I removed the bracket that was molded into the bottom side of each runner. I asked FAST what it was for and they could not tell me. They did say that it was OK to remove to add more air volume to the plenum. The photos in the Colorado Speed post does not show the High HP runners with the molded in bracket . The photo that I found in one of the FAST test videos that I attached does show the bracket. FAST should just remove it.

LEAVINU

I feel like there's and unrepresented market with current FAST owners. I'm making over 600rwhp through a FAST 90 (ported) but like all of us am always looking to get just a little more.

When will vendors do a A-B for those like me. The money is just sitting there waiting to be spent.

ChrisUlrich

So no numbers to back up you're feeling... but you feel pretty confident the increase of power up top?

I know you're motor is way crazier than my stock head, cam only LS3. But I imagine I would still benefit from that!

C6RAPTOR

Stock heads with cam only , just have your intake ported by BER.

Suns_PSD

Correction, Gwatney..

HC Mechanic

Do you have any dyno comparisions between the 3 stack lengths?