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. This is for LS2, LS3 and LS7 manifolds. We do not port the LS1 & LS6 manifolds, as there are not any measurable gains from porting these.

The Stage 2 intake manifold is $375.00 and if you want to add a ported throttle body, that is $100.00 (save $50.00 off TB by ordering together), plus shipping (usually no more than $20.00). The core charge for both is $550.00 ($275.00 each), it is refunded when we receive your undamaged intake and TB back.

If you elect to ship us your intake and throttle body, the turn around time is typically 2-3 business days.

Our shipping address is:

Fasterproms
19103 Sunlake Blvd.
Lutz, FL 33558

To order call 813 476 7364.

Thank you

Dan

Fasterproms

 

GTO Intake Removal
Tools needed:
Ratchet or speed wrench
8mm or 5/16” socket short well
10mm socket deep well
Medium flathead screwdriver
Medium needle nose pliers
Brake cleaner solvent
Rag/ towels
*Tips- Some connectors have light grey slip locks in them (TB, MAF, some injectors) squeeze the sides of the lock and slide it off and then you will be able to pinch the connector to remove it.
-Towels work well as fender covers
Instructions
1) Disconnect and remove the Air intake system and MAF.
2) Disconnect the following electrical connectors: throttle body, MAP sensor(3 wire connector attached to the int manifold behind the TB flange), Evap 2 wire blk (close to oil fill), (The injector wire harness loom is held up by 2 plastic tabs on each side of the fuel rail. These can be removed by a flat blade screwdriver, and pushed back in when you are reinstalling.) Injectors, pull the grey clip up and twist it off and it will snap off then pinch the tip of the inj harness and pull up.) The hard blk plastic line is the EVAP. To remove push in the little white ring tab on one side and pull out, give her a slight wiggle and be patient . Remove both lines from the solenoid on the passenger side that crosses over to the driver side of the manifold just behind the TB flange. Disconnect the rubber u molded PCV hose on the passenger side of the manifold.
3) Remove the 4 10mm Fuel rail Studs (There is a grounding strap holding down the front driver corner of the rail it is an 8mm intake bolt). Pry the rail up from the outside using the flat portion of the manifold as a leverage point. This should pop the injectors up out of the manifold. You will have to do this on both sides of the manifold. With fuel line attached to the fuel rail, lay it off to the driver side of engine bay.
4) Remove the 10 8mm intake bolts, this will allow the intake to be lifted to remove the vacuum hose and brake booster line in the rear of the manifold. Some require you to remove the 3 wire oil pressure sensor connector to get to the aforementioned hoses. Use the pliers to slide the clip back holding the brake booster vacuum line.
5) With the manifold off and the cylinder head intake runners exposed you will find oil in the ports. Any oil consumed lowers octane rating and thus increases the likeliness of spark knock. I use a rag sprayed with brake clean to remove as much oil as possible.

This is my first instruction sheet on anything so please bare with me. I hope that this helps. Ultimately you are responsible for what you do to your car. I have never hurt or damaged any car using this procedure. If you are inexperienced get a qualified mechanic.

 

We have been receiving requests to purchase LS2 Stage 2 intake manifolds outright and we now have a limited number available, they can be purchased for $550.00 shipped in the lower 48. We also can sell the Stage 1's for $475.00 shipped.

Thanks

Dan
Fasterproms

 

Here is a helpful tuning tip post for those doing there own tuning, or having others doing the tune:

https://ls1tech.com/forums/pcm-diagn...folds-tbs.html

 

Now thats how you port...... Nice job....

 

That's a pretty sweet deal. I just picked up my goat last
friday and I'm glad to see so many options for it.

 

Thank you - it's a lot of work, and the R&D was extensive - but it's worth it.

Just an FYI - Jeremy will be in Davie just south of Pompano this Friday and Saturday. Here is a link if you are interested in some go fast goodies:

https://ls1tech.com/forums/florida-m...7th-davie.html

Thanks
Dan
Fasterproms

 

We also have LS2 (stage 1 or 2) intakes available for out right purchase for $550.00 shipped in the lower 48. The LS2 stage 2 should show gains over stock of at least 17 rwhp and 17 rwtq or more depending on mods.

 

We now have a LS7 dyno to show the gains from a stage 1 to a stage 2;

This Car is an 07 Z06 with the following mods:
Callaway CAI, Fasterproms Ported TB and stg 1 manifold, STOCK EXH manifolds, B&B Fusion catback, Fasterproms custom tune.
Run 1 was a baseline pull with all aforementioned mods, fully optimized.
Run 6 was Stg 2 manifold and a tuning tweak, more fuel.

We were pleased to get this kind of power in weather in 90F + air temps.

Bottom line: Stage 2 over Stage 1 picked up 6 rwhp and 9 rwtq through out the rev range, and 10 and 10 in some areas.

Jeremy Formato