Ported LS2 Intake
Safety Car
Joined: Jan 2006
Posts: 3,598
Likes: 0
From: indianapolis indiana
Originally Posted by Flareside
Just for reference, here's how the new LS2 intake looks from the factory. There's certainly room for improvement here. The rough areas and steps are even worse in person. Every port looks like this, and the problems run deep into every runner.
Melting Slicks
Joined: Feb 2005
Posts: 2,179
Likes: 97
From: Palm Coast, FL
sscamaro: Mind if I ask what Jeramy charged you for the porting of the intake? Was that all you had done or did you have other work done too, at the same time? I am having a completed exhaust system with headers, hi-flo cats and x-pipe installed this week and was wondering if I should have the intake ported too?
thanks...
thanks...
Melting Slicks
Joined: Nov 2004
Posts: 2,285
Likes: 0
From: Denver PA
St. Jude Donor '07
Originally Posted by MKS
thanks for the link and did you get the 388hp with the ported intake and tune ?
Melting Slicks
Joined: Nov 2004
Posts: 2,285
Likes: 0
From: Denver PA
St. Jude Donor '07
Originally Posted by purple heart
sscamaro: Mind if I ask what Jeramy charged you for the porting of the intake? Was that all you had done or did you have other work done too, at the same time? I am having a completed exhaust system with headers, hi-flo cats and x-pipe installed this week and was wondering if I should have the intake ported too?
thanks...
thanks...
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Originally Posted by SpinMonster
Just leave it stock, GM designed it to work the way it comes from the plant.
Sorry I just had to
Sorry I just had to
Racer
Joined: Jan 2002
Posts: 401
Likes: 0
From: Cantonment Florida
I don't know about you.....
But I'm thinking $250. for 15 rwhp is a bargain ! In my quest to see just how much rwhp I can make without going into the engine, this would be an extra nice gain ! Almost as nice a gain as the L/T's I just installed. I will be adding a ported intake, and a set of 1.8 ratio rockers to my car soon, and I'm hoping to see 410-415 rwhp. I haven't dynoed the car since the L/T's were installed, but in talking with my tuner, he said on average he see's similar LS2's pick up 30 rwhp. My car baselined at 345 uncorrected, then with a tune made 355 uncorrected. I hope to be back on the dyno to check the numbers before I install the rocker arms and intake, so I can get the before and after numbers. We'll see.......
Steve.
Steve.
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Instructor
Joined: Apr 2006
Posts: 206
Likes: 0
Originally Posted by P-Colavette
But I'm thinking $250. for 15 rwhp is a bargain ! In my quest to see just how much rwhp I can make without going into the engine, this would be an extra nice gain ! Almost as nice a gain as the L/T's I just installed. I will be adding a ported intake, and a set of 1.8 ratio rockers to my car soon, and I'm hoping to see 410-415 rwhp. I haven't dynoed the car since the L/T's were installed, but in talking with my tuner, he said on average he see's similar LS2's pick up 30 rwhp. My car baselined at 345 uncorrected, then with a tune made 355 uncorrected. I hope to be back on the dyno to check the numbers before I install the rocker arms and intake, so I can get the before and after numbers. We'll see.......
Steve.
Steve.
Read replies # 8 & #27 on this thread, that is also my opinion. Is it going to be flow tested after porting? How will you know if a cylinder is running too rich or worse too lean? Good luck.
Last edited by Two-Lane Blacktop; Jun 5, 2006 at 03:39 PM.
Instructor
Joined: Nov 2005
Posts: 129
Likes: 0
From: Lake Zurich IL
Originally Posted by SpinMonster
Just leave it stock, GM designed it to work the way it comes from the plant.
Sorry I just had to
Sorry I just had to
Had to say it. Just because GM built it that way don't make it 100% perfect by a long shot. Cars are built for the masses not the enthusiast who wants a bit more.
Le Mans Master
Joined: Sep 2004
Posts: 7,027
Likes: 6
From: Shiloh Ohio
Originally Posted by JohngC62005
Is this the same GM that designed my PCM program to run lean at idle and low RPM's and rich at anything over 3,500 RPM's.
Had to say it. Just because GM built it that way don't make it 100% perfect by a long shot. Cars are built for the masses not the enthusiast who wants a bit more.
Had to say it. Just because GM built it that way don't make it 100% perfect by a long shot. Cars are built for the masses not the enthusiast who wants a bit more.
Drifting
Joined: Feb 2006
Posts: 1,349
Likes: 0
Originally Posted by shurite44
Spin was just joking with that comment. He is a modding enthusiast.
to the modding enthusiasts, i'll definately be attempting to port possibly my TB and Intake Manifold. Then again i've never ported or polished anything so i'll need to learn how. But that's the fun isn't it?
Last edited by Tavarez; Jun 8, 2006 at 02:50 PM.
Instructor
Joined: Mar 2006
Posts: 146
Likes: 0
From: Woodstock MD
Originally Posted by andreas g.
From what I'm reading you guys are removing so little material how much are you really going to gain?. I've looked at my LS2 intake and there's not much you can remove to gain any benefit. Port matching and clean up does very little to improve flow, because It's not port so much that's inadequate, it's the runners and the size of the plenium that limits the flow capacity of the manifold, and you can't do anything to improve it. An LS6 manifold would be better, but it's TB is to small.
You're trying hard to split hairs here, and it's not for a lack of trying to make it better. It's just not going to work very well. I know the FAST 90 manifold is costly, and it's costly to moddify it and the firewall. I would save my money and get one, because to resulting HP and TQ gains are impressive. Before I installed my FAST my car was making 410RWHP/384RWTQ, after it jumped to 425RWHP/405RWTQ. Then adding my ET 215 heads,it jumped again to 461/435. I really believe even though the ET head design is excellent they wouldn't have worked as well without the FAST. If you're looking for long term gains that can be improved upon as you do more additions; I think the FAST is a good investment. I know this is more than .02 cents, but....
Andreas g.
You're trying hard to split hairs here, and it's not for a lack of trying to make it better. It's just not going to work very well. I know the FAST 90 manifold is costly, and it's costly to moddify it and the firewall. I would save my money and get one, because to resulting HP and TQ gains are impressive. Before I installed my FAST my car was making 410RWHP/384RWTQ, after it jumped to 425RWHP/405RWTQ. Then adding my ET 215 heads,it jumped again to 461/435. I really believe even though the ET head design is excellent they wouldn't have worked as well without the FAST. If you're looking for long term gains that can be improved upon as you do more additions; I think the FAST is a good investment. I know this is more than .02 cents, but....
Andreas g.
Melting Slicks
Joined: Nov 2002
Posts: 3,398
Likes: 2
From: Allentown PA
Originally Posted by purple heart
How much is a FAST intake for the LS2 anyway? $250 to have the LS2 ported and $XXX.00 to buy the FAST-which is the better choice with just external mods only?
Hmmmmmmmm?
Hmmmmmmmm?
I have a ported intake, I couldn't see spending the money on a FAST.