Porting the L92 intake Help me out
Thread Starter
Teching In
Joined: Sep 2012
Posts: 22
Likes: 0
Porting the L92 intake Help me out getting ready to port my l92 intake manifold and i was wondering if someone could give me a bit of direction. I am going to port match the runners to the heads but i am a bit lost at what i should do inside the plenum.
afraid to grind on that big bump with a hole in it towards the rear of the plenum. I obviously dont know all the dynamics of the airflow so i was wondering if someone could help me out. I dont want to end up with something worse than i started with.
i was planning to enlarge the hole in the bump and narrow down the post on top of it. sound like a good idea?
of course im also going to open up the inlet a little, but what else is there i can do?
afraid to grind on that big bump with a hole in it towards the rear of the plenum. I obviously dont know all the dynamics of the airflow so i was wondering if someone could help me out. I dont want to end up with something worse than i started with.
i was planning to enlarge the hole in the bump and narrow down the post on top of it. sound like a good idea?
of course im also going to open up the inlet a little, but what else is there i can do?
Last edited by BigAce; Oct 30, 2012 at 03:23 PM.
I have no experience porting these, but it seems as if the guys that were getting decent numbers out of them were cutting them apart to port them and then plastic welding them back together.
Thread Starter
Teching In
Joined: Sep 2012
Posts: 22
Likes: 0
So id like to port whatever i can reach inside there
TECH Enthusiast
Joined: Apr 2010
Posts: 651
Likes: 10
From: North Carolina
The "inexpensive" solution is to try to port you L92 manifold . . .
The "compromise" solution is to send your manifold out to have it professionally ported.
Without cutting it open ,you can not get any substantial gains. But you can open up the throat and port the runners tho. As far as the hole at the end of the log , I would leave it alone, unless your going to open it up and try to do a radical port job. Peakspeedshop a sponsor on here does good work, take a look a some of their pictures and you will get an idea of the work involved to get good gains from porting. They earn every dollar they charge, its takes proper tools and alot of time to do one properly.
Thread Starter
Teching In
Joined: Sep 2012
Posts: 22
Likes: 0
Without cutting it open ,you can not get any substantial gains. But you can open up the throat and port the runners tho. As far as the hole at the end of the log , I would leave it alone, unless your going to open it up and try to do a radical port job. Peakspeedshop a sponsor on here does good work, take a look a some of their pictures and you will get an idea of the work involved to get good gains from porting. They earn every dollar they charge, its takes proper tools and alot of time to do one properly.
thanks that was what i was looking for.
I have been looking at peak's pictures, if i planned to stay NA i would definetly send it to them but the motor will be getting a whipple soon so it would kind of be a waste for me to send it out or spend the time to hack it open and risk it not sealing properly.
I think I will just port the runners and open up the inlet a bit, keep it simple and easy.
So you wouldnt enlarge that hole at the end at all? in peak speedshop's diagram of the airflow they show how that piece at the end of the log is restricting flow. So i have been wondering if it would be beneficial to enlarge the hole a bit to allow more air to flow past that huge bump.
Or is there any way that enlarging that hole would hurt flow? Im afraid to mess with it
Trending Topics
thanks that was what i was looking for.
I have been looking at peak's pictures, if i planned to stay NA i would definetly send it to them but the motor will be getting a whipple soon so it would kind of be a waste for me to send it out or spend the time to hack it open and risk it not sealing properly.
I think I will just port the runners and open up the inlet a bit, keep it simple and easy.
So you wouldnt enlarge that hole at the end at all? in peak speedshop's diagram of the airflow they show how that piece at the end of the log is restricting flow. So i have been wondering if it would be beneficial to enlarge the hole a bit to allow more air to flow past that huge bump.
Or is there any way that enlarging that hole would hurt flow? Im afraid to mess with it
I have been looking at peak's pictures, if i planned to stay NA i would definetly send it to them but the motor will be getting a whipple soon so it would kind of be a waste for me to send it out or spend the time to hack it open and risk it not sealing properly.
I think I will just port the runners and open up the inlet a bit, keep it simple and easy.
So you wouldnt enlarge that hole at the end at all? in peak speedshop's diagram of the airflow they show how that piece at the end of the log is restricting flow. So i have been wondering if it would be beneficial to enlarge the hole a bit to allow more air to flow past that huge bump.
Or is there any way that enlarging that hole would hurt flow? Im afraid to mess with it
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Joined: Jul 2007
Posts: 1,502
Likes: 177
From: ELSA, South TEXAS (956) 802-7700
. but before i installed, i came across on a deal on a ls2portworks ported l92 intake and jumped on it. love it even though i have never dynoed my truck, it runs very very good 
Did you do your ported intake swap along with other mods or just the intake buy itself. The problem with comparing, is alot of guys do other mods along with intake so its hard to tell if or how much a ported intake helps. If it was just a intake swap tell us if there was a seat of the pants difference in performance. Most of those Ls2 portworks are good for 10hp gain or more.
Thread Starter
Teching In
Joined: Sep 2012
Posts: 22
Likes: 0
Did you do your ported intake swap along with other mods or just the intake buy itself. The problem with comparing, is alot of guys do other mods along with intake so its hard to tell if or how much a ported intake helps. If it was just a intake swap tell us if there was a seat of the pants difference in performance. Most of those Ls2 portworks are good for 10hp gain or more.
I will not have a useful comparison at all. The motor is getting stroked and cammed at the same time. the manifold was already off so i decided i may as well port it.
I wish i could have done it on it's own to know if it really made it run any better.
If i can get half of the gains from a professionally ported intake i would be very happy. il bet it would be worth 5-8 hp or so, especially on a stroked l92.
It is practically free horsepower too, just the time it takes me mess around for a few hours with a dremel with flexshaft and the cost of a few sanding rolls.
I hear ya,
I will not have a useful comparison at all. The motor is getting stroked and cammed at the same time. the manifold was already off so i decided i may as well port it.
I wish i could have done it on it's own to know if it really made it run any better.
If i can get half of the gains from a professionally ported intake i would be very happy. il bet it would be worth 5-8 hp or so, especially on a stroked l92.
It is practically free horsepower too, just the time it takes me mess around for a few hours with a dremel with flexshaft and the cost of a few sanding rolls.
I will not have a useful comparison at all. The motor is getting stroked and cammed at the same time. the manifold was already off so i decided i may as well port it.
I wish i could have done it on it's own to know if it really made it run any better.
If i can get half of the gains from a professionally ported intake i would be very happy. il bet it would be worth 5-8 hp or so, especially on a stroked l92.
It is practically free horsepower too, just the time it takes me mess around for a few hours with a dremel with flexshaft and the cost of a few sanding rolls.
