Porting the intake manifold on 6.2L/L92
04-19-2010 | 04:00 PM
#12
Lots of great info in this thread. You dont really lose bottom end but you gain up top
https://ls1tech.com/forums/generatio...omparison.html
https://ls1tech.com/forums/generatio...omparison.html
04-19-2010 | 04:41 PM
#13
Thread Starter
13 Second Truck Club
Joined: Apr 2006
Posts: 698
Likes: 0
From: Cajun Country...Lafayette, LA
FAST aftermarket intake manifold for Cars.... http://www.fuelairspark.com/0/FS/Intake/Default.aspx
FAST aftermarket intake manifold for Trucks, notice the longer runners... http://www.fuelairspark.com/1/FS/Intake/Default.aspx
GM and FAST must agree also agree that longer runners are needed get a heavy ride moving (low to midrange Tq)
FAST aftermarket intake manifold for Trucks, notice the longer runners... http://www.fuelairspark.com/1/FS/Intake/Default.aspx
GM and FAST must agree also agree that longer runners are needed get a heavy ride moving (low to midrange Tq)
Last edited by markislive78; 04-19-2010 at 04:48 PM.
04-19-2010 | 04:57 PM
#14
Yes definitely both of those are better but at five times the cost ( need a new tb as well for FAST ) and only minimal gains over LS3 intake unless your getting into big cubes or camming the hell out of it and spinning 8000 RPM.
WCCH is a very very reputable shop and that link i posted shows the tests and results. Plus many other swappers over at tech use the LS3 ( L76 ) intake with great results.
Anyways I sure wasnt trying to ruffle any feathers just trying to help the guy make a bit more power. The LS3/L76 intakes makes more power than the L92 truck intake does and its cheap. You can buy them brand new with injectors and fuel rail and bolts for around 350 bucks and its about 250 to port it. Gains of 25 or so whp over the stock truck intake.
WCCH is a very very reputable shop and that link i posted shows the tests and results. Plus many other swappers over at tech use the LS3 ( L76 ) intake with great results.
Anyways I sure wasnt trying to ruffle any feathers just trying to help the guy make a bit more power. The LS3/L76 intakes makes more power than the L92 truck intake does and its cheap. You can buy them brand new with injectors and fuel rail and bolts for around 350 bucks and its about 250 to port it. Gains of 25 or so whp over the stock truck intake.
04-19-2010 | 05:12 PM
#15
Thread Starter
13 Second Truck Club
Joined: Apr 2006
Posts: 698
Likes: 0
From: Cajun Country...Lafayette, LA
So I would get a 25Hp increase with a LS3 intake bolted on to my truck?
Where did you see this?
04-19-2010 | 05:31 PM
#16
Yes with a ported LS3 you should gain at least 25 whp over the stock L92 intake.
I understand what your saying about torque etc and the truck design is what it is for whatever the reasons are only GM knows exactly why. I've read its about keeping the owners in the power range they want for less warranty issues all the way to some claims that the L92 makes even more power than the LS3 intake. There are threads out there saying all of this.
However power is power and the L92 and LS3 intake are close in performance but not up top. Especially when you look at Richards test they are a coin toss until 5500 RPM or so. After that is where the LS3 is going to shine better. Most ported LS3 intakes add 15-20 whp on LS3 builds so if the LS3 flows more than the L92 up top ( where you peak number is ) and you get one ported, then 25whp or so is a pretty good guesstimate as I see it. Plus theres lots of porters out there with lots more experience porting these vs the L92 intake and they have their own threads on stock vs ported dyno numbers etc. The homework over what to port and how to port it on the LS3 intake is more solved so it also stands to reason that you would have better results because of this.
Anyways Im not really sure why you dont like what im trying to say and Im certain that you will make more power than all of the porting this/that ideas by just buying the FAST on go. So good luck whatever you do
I understand what your saying about torque etc and the truck design is what it is for whatever the reasons are only GM knows exactly why. I've read its about keeping the owners in the power range they want for less warranty issues all the way to some claims that the L92 makes even more power than the LS3 intake. There are threads out there saying all of this.
However power is power and the L92 and LS3 intake are close in performance but not up top. Especially when you look at Richards test they are a coin toss until 5500 RPM or so. After that is where the LS3 is going to shine better. Most ported LS3 intakes add 15-20 whp on LS3 builds so if the LS3 flows more than the L92 up top ( where you peak number is ) and you get one ported, then 25whp or so is a pretty good guesstimate as I see it. Plus theres lots of porters out there with lots more experience porting these vs the L92 intake and they have their own threads on stock vs ported dyno numbers etc. The homework over what to port and how to port it on the LS3 intake is more solved so it also stands to reason that you would have better results because of this.
Anyways Im not really sure why you dont like what im trying to say and Im certain that you will make more power than all of the porting this/that ideas by just buying the FAST on go. So good luck whatever you do
04-19-2010 | 08:31 PM
#17
04-20-2010 | 05:44 AM
#18
Thread Starter
13 Second Truck Club
Joined: Apr 2006
Posts: 698
Likes: 0
From: Cajun Country...Lafayette, LA
Yes with a ported LS3 you should gain at least 25 whp over the stock L92 intake.
I understand what your saying about torque etc and the truck design is what it is for whatever the reasons are only GM knows exactly why. I've read its about keeping the owners in the power range they want for less warranty issues all the way to some claims that the L92 makes even more power than the LS3 intake. There are threads out there saying all of this.
However power is power and the L92 and LS3 intake are close in performance but not up top. Especially when you look at Richards test they are a coin toss until 5500 RPM or so. After that is where the LS3 is going to shine better. Most ported LS3 intakes add 15-20 whp on LS3 builds so if the LS3 flows more than the L92 up top ( where you peak number is ) and you get one ported, then 25whp or so is a pretty good guesstimate as I see it. Plus theres lots of porters out there with lots more experience porting these vs the L92 intake and they have their own threads on stock vs ported dyno numbers etc. The homework over what to port and how to port it on the LS3 intake is more solved so it also stands to reason that you would have better results because of this.
Anyways Im not really sure why you dont like what im trying to say and Im certain that you will make more power than all of the porting this/that ideas by just buying the FAST on go. So good luck whatever you do
I understand what your saying about torque etc and the truck design is what it is for whatever the reasons are only GM knows exactly why. I've read its about keeping the owners in the power range they want for less warranty issues all the way to some claims that the L92 makes even more power than the LS3 intake. There are threads out there saying all of this.
However power is power and the L92 and LS3 intake are close in performance but not up top. Especially when you look at Richards test they are a coin toss until 5500 RPM or so. After that is where the LS3 is going to shine better. Most ported LS3 intakes add 15-20 whp on LS3 builds so if the LS3 flows more than the L92 up top ( where you peak number is ) and you get one ported, then 25whp or so is a pretty good guesstimate as I see it. Plus theres lots of porters out there with lots more experience porting these vs the L92 intake and they have their own threads on stock vs ported dyno numbers etc. The homework over what to port and how to port it on the LS3 intake is more solved so it also stands to reason that you would have better results because of this.
Anyways Im not really sure why you dont like what im trying to say and Im certain that you will make more power than all of the porting this/that ideas by just buying the FAST on go. So good luck whatever you do
Check out this post from the same thread.. https://ls1tech.com/forums/12652250-post48.html
Last edited by markislive78; 04-20-2010 at 09:08 AM.
04-20-2010 | 11:05 AM
#20
Wasn't trying to be a dick, just always up for a good debate.... I'd sure like to see a dyno comparison of a ported LS3 intake on a stock or mild mod L92, I just wonder how much those short runners would kill your 60' times and part throttle manners on a mild modded 5k+ lb "daily driver"... He was only measuring flow, which has nothing to do with velocity or bottom end Tq... Yes, The LS3 intake looks WAY better but think you have to relocate the water pump....
Check out this post from the same thread.. https://ls1tech.com/forums/12652250-post48.html
Check out this post from the same thread.. https://ls1tech.com/forums/12652250-post48.html
Horse Power!
So back on track here I read that post and it does make sense but someone did swap an LS3 intake onto an L92 and posted dyno charts somewhere and iirc the LS3 intake didnt lose any bottom end at all but it did gain up top. I cant find the link now of course or i would have posted it last night but I found it when I was buying parts for my L92. Anyways if funds permit i'd just get that monstrous truck FAST truck intake I wasnt even aware that it existed until this thread to be honest