I was looking at the LS6 intake yesterday and looking at how to improve it. What would make sense for better performance?

Shorter Runners?
Longer Runners?
Bigger Plenum?
Larger inlet?
Phillip

 

Phil---The one Patrick(vararam) is about to market has re-worked runners but the major power increase(25+rwhp after testing) is eliminating the goose neck that restricts and even creates a certain amount of negative pressure, supposed to be released in the next 2 to 3 weeks, Patick told me one of his customers cut off the goose neck and remounted his TB and got 22rwhp just with this mod to the ls6 intake. So you may want to concentrate on hogging out the area behind the neck like several of the tuners are doing, I'm waiting on the Vararam and considering mounting the new TPIS Oval Billet alum 1300cfm TB, Tpis claimes 31rwhp on a 427 and 22 on a 346, Patrick is an air flow engineer and feels that the majority of their gains may be from hogging out the goose neck to mount it. I am hoping for 30+rwhp from these 2 items on the 436 (if the damn thing ever gets here)

 

I have a new idea for the goose neck. I have a manifold right now I am working on with a new inlet and larger plenum. ;)
Phillip

 

Phil..... Add a Direct port kit.... :steering:

 

Direct port :crazy: That will end up being 700rwhp. I think I am content with fixing the gooseneck, adding plenum volume and smoothing the runners. Once you cut the bottom of the manifold off you see some interesting things....
Phillip

 

I know Vararam is coming out with one soon - but I went with a Cartek (OEM) ported intake and didnt get any gains on the dyno - but the car pulls harder on the topend for sure.. ;)

 

Would there be a gain by porting the stock setup on stock disp. heads/cam cars?

 

The Gen IV engines will have some airflow surprises, that will make screwing around with the intake manifold on the Gen III engine a waste of time.

The nice thing is that the General has made everything backward compatible with the Gen III motor, for us motorheads.

Jim

 

Now this sounds like a tasty bit of information. :D

BTW Jim, I emailed you yesterday.

Jon
http://www.ls1howto.com




[Modified by jmX, 6:58 PM 6/14/2003]

 

I was hoping myself....C6 intake +40hp...... :cry please

 

Could you please explain this "gooseneck"? :cheers: Is this a restriction in the plenum?

 

How about runners that adjust length according to rpm? The 'trombone' mod. :D The plenum can drop or twist as rpm rises.

Seriously, I've always wondered why intakes were not designed like headers so that intake pulses would accellerate each other at the throttle body. Why are intake runners at a right angle to where the air flows into the manifold? Why aren't they all pointed to where the air comes from?

 

I think Jim is referring to the new intake manifold that I have heard rumors about. Basically just like the LS1 to LS6 intake swap we will probably be swapping to the new LS2 intake...

The rumors I hear have not confirmed one way or the other if this intake will be released with the 2004 models to help bump the HP for the last year and carry over to the C6.

Also, Wilson manifolds has been doing development work for "someone". On a new intake for the LS series motor which will be out soon. You might wish to call them. Alos you might consider call wheel to wheel, to find out about that intake on the Camaro they have been showing around (whhel to wheel did the motor).

 

:iagree:

I emailed wheel to wheel.... no response yet :cry

That intake seems to be the ideal setup.

 

I’ve also talked with Patrick who designed the Vararam. He said their new intake works the best on larger displacement motors 383 – up, but you still get some gains with the intake on a stock CI motor. There in house Cartek 430 RWHP car with just the new intake and the car before had Carteks ported LS6 went from 430 to 455 RWHP. He said the biggest bang for your buck is to just buy their new TB and you will get 23 RWHP for a 200-300 TB vs. getting 25 RWHP for an 800-1000 intake. They also are coming out with some pieces that go in front and back of the TB to give it better airflow and higher port velocity. He said those piece are going to cost about 50-80 each and will gave you 10 RWHP, but together you will only get 15 RWHP and with the new TB if you use those pieces you will only need the front one and will get 5 RWHP. He said this technology is nothing new but just hasn’t been offered to the public. That they have been designing and using it on race cars for some time, and that it has to be re designed to work with a stock motor. He sounds like he knows what he’s doing. Everything is tested for around 6 months and tested buy other out side sources, like Cartek. I got my manometer pressure readings from him for the Vararam, stock air box, blackwing, and a few others. He takes reading in the lab and on the road. I know the TB and intake they have tested it out on a two Carteck cars, MTI, and Lingenfelter. :cool:

 

I use the term gooseneck refering to the skinny tube that sticks out of the front of the manifold where the TB bolts on, very restrictive and deff air flow problems--

 

Any pics?

 

Hi Jim, I heard that very little to any pieces will be compatible with the GENIII.

However, there is a non-metal intake almost done for the GenIIIs. I think you guys will be VERY pleased. :cheers:

 

What if you buy their TB and intake manifold what kind of gains are we looking at---

 

:iagree: I don't want to cause a panic or start a stampead but is there something about the gen iV intake we should know before we spend a bundle on some of the new options coming on-line--at this point I am all over a new Vararam and their TB (I was thinking it would look sweat hooked up to your new nose feeder setup) and thinking the combo of these 3 items would be about a good as it gets, I'm looking at another 2K plus tuning it in, if there is something else you can tell us it may save a lot of guys a lot of money, however if its one of those confidential sources I understand your not being able to say--a deal is a deal---thanks jim---Bill