Stage 2 LS2/3/7 intake porting

While the intake manifold is more often than not a restriction in the induction we aim to make it as little of a restriction as possible. All of our typical stg 1 LS2/3/7
manifolds are ported to about 93mm, or 3mm larger than the stk TB flange opening. Our ported FASTs are closer to 95mm but they are over 94mm. This is all in the interest
of most gross flow at the entry and most plenum volume. Typical stage one manifold porting is very extensive and time consuming to port correctly. We remove a very
substantial amount of material from the plenum, TB flange, and runners. We offer the most aggressive porting for the dollar and strive to go the extra mile in all that
we do: porting, tuning, and installs.

We avg over 11rwhp and 13rwtq from our base Ls2 manifold porting with over 420 LS2s to our credit, 95+ LS7 (18RWHP and 20RWTQ), 60+ LS3 & L76s (12RWHP and 15RWTQ) and over 400 TB's.. We were curious as to how far we could take the manifold by really opening it up to the next level and taking a page out of the FAST/Wilson notebook...

Stage 2 porting is taking the manifold to its limit - as much of the plenum is removed while still staying safe from vacuum leaks, which takes about twice the time to port.
The FAST manifold utilizes as much plenum volume as possible within the space requirements - the larger the air reservoir the less likely it is to deplete it at medium and high rpm. Hence the difference from an LS1 to an LS6 manifold, plenum volume. (We have tested this manifold swap many times for an avg gain of 10RWHP and 10RWTQ; again plenum volume.)

We rework all the runners for an even deeper cut and we use a much more aggressive sanding method, even deeper than the 8 inches we typically port in the stg 1 manifolds. For stage two manifolds we remove the inner posts and completely flatten the plenum floor all the way to the back on the inside of the manifold as well as the outside so as to make a sort of air gap between the valley and manifold base. We epoxy small aluminum plates, screw them in, and then epoxy the inside as well, to prevent any air leaks. This stage 2 manifold porting is a cheaper alternative to a FAST manifold, but it is also designed for someone that is trying to FULLY optimize their power on a budget. We are targeting those that want the MOST from the stock manifold at a decent price.

On our own GTO we tested the stage 2 manifold vs our stage one and we picked up an additional 6rwhp and 7 rwtq on an A-B test on the dyno same day, same weather, same engine conditions. This is in addition to the 11/13 from the stage one manifold We also had an independent test done by a shop in NY and they gained over 15+rwhp and 18+rwTQ.
We do not offer stg2 for the FASTs. We port all of them as aggressively as possible over 3.5 hrs per manifold.

Stock opening:

Stage 2 opening:

Stock floor:

Stage 2 floor

Stock Floor:

Stage 2 floor:




Stage 2 on the top, stocker on the bottom:

Stock:

Stage 2



The Stage 2 manifold pictured here has been on our GTO for the last year with out any problems what so ever. It is after this long term testing and dyno proven results that we are proud to now offer this power making manifold for $375.00 (like all of our manifolds, on an exchange basis). These are for LS2, LS3 and LS7 manifolds. We do not port the LS1 & LS6 manifolds, as we have not seen any measurable gains from porting.

 

looks great, coming to the market with more hp is always a good thing

 

how much for just stage 1 porting on 08 LS3? do you keep manifolds in stock or do i send it in to be done and returned? plus 1 free bump,no charge....

 

Does the increase hp and tq include the ported TB added to it or is that just the manifold itself?

 

Thank you sir, .

I literally lol'd at your free bump no charge...so thanks!

The stage one porting is $300.00 plus shipping and we do keep them in stock. The core charge is $275.00, that is refunded when we receive your undamaged core back. If you would like to send your manifold in for porting, the typical turn around time is 2-3 business days. Stage 1 LS3's typical gain is 12RWHP and 15RWTQ. A great addition to that is a ported throttle body for $150.00 or when coupled with the Stage 1 intake for $400.00 plus shipping. UPS ground shipping usually runs about $22.00


A ported TB, while a great seat of the pants gain, due to the increased throttle response does not yeild any measurable hp/tq gains. Long answer short, is that it's just the intake manifold itself.

Thanks

Dan
Fasterproms

 

Do you have any dyno numbers for the Stage 2 on an LS3? And do you have this manifold in stage 2 porting in stock?

 

None yet (will be having one soon with Texas Speed)won a LS3 as of yet, but here is one from our GTO that had a very aggressively ported stage 1, then removed on the dyno and the stage 2 installed:

 

Awesome R&D Jeremy. I had thought of the removal of the posts but didnt think it would amount to much. My test unit actually had the entire floor cut out and replaced with a smooth straight plastic but I never felt comfy with gluing the two parts and not having an air leak. It was a big chance to take especially if it was to be used on a boosted application. In the end I was laughing about the unreal amount of time I was putting into a single piece and thinking that it wasnt much of a power gain for the price I would have to charge so I didnt take it further.

I narrow down the front post to make it less of a target and smooth the floor but hey, you did it first on a cut in.

I guess its something that will make its way into the mainstream one day once a few people run it that way.

Bump for you.

 

The gains look pretty solid over the stage 1. Well worth the 75 dollar bump.

 

 

Looks good jeremy.. I already have one of your stage one ported manifolds.. how much would it be to swap mine for a stage 2?

 

If anyone has our original stage 1 manifold we will do the additional porting needed to make it a stage 2 for $125.00. The only requirement is it has to be our manifold and not a competitors.

Thanks

Dan
Fasterproms

 

I have a port job from ls2portworks. If I decided to go with your product, what would my options be?

 

Hi,

I believe you did a Stage 1 on my 08 VY C6 M6. My question is with a big "IF" concerning the FAST LS3 intake.

If they come out with it how would your stage 2 compare to the LS3 FAST by itself and then with your porting skills on the FAST LS3?

I understand the LS3 FAST is advertised around $900, and a stage 2 port with some 4.10 gears may make a lot more sense.

Thanks, Dewey

 

Jeremy, You got a great thread going here with innovations on the LS2
OEM STAGE1 and 2. After looking at it I taught about How much we got
out of the PORTED FAST in March of 2008. At that time I took several Pics
of the PORTED FAST. The front pic showing the inside I see a similar POST
right smack in the middle of the manifold just like the OEM. I was wondering if that could be removed as it represents a restriction just as the OEM. Maybe it cant be removed and is necessary for structural integrity. Just a thaught. All your porting has done much for me especially
with the SPINFAST mods we got like 22 & 26 over your own ported OEM.
Keep up the good work, Leon

 

PM sent

 

Any FI numbers/benefit?

 

how much for a stage 2 and a ported TB ?

 

DITTO--Jeremy, you were right about the stage 1==It's more fun to drive. I'll be talking to you about Stage 2. Thanx for a great and thorough job. Ray

 

IIRC, it's $475.