Dorman 90 intake?
Thread Starter
Burning Brakes
Joined: Apr 2002
Posts: 1,105
Likes: 114
From: Lawrenceburg, KY
Dorman 90 intake?
I'm considering converting to the Dorman 90mm intake (currently have a stock LS6) as I'm not interested in paying $875 for a FAST 92 (that's ridiculous). The Dorman 90 seems to be getting good reviews, but I wanted to get some 1st hand feedback from anyone who might actually have it.
I already have the LS2 90mm TB in hand, so all I need is the intake to make the swap.
Thanks
I already have the LS2 90mm TB in hand, so all I need is the intake to make the swap.
Thanks
Last edited by ChrisLSx; Jan 25, 2018 at 12:08 PM.
Instructor
Joined: Feb 2017
Posts: 190
Likes: 27
From: Oklahoma
I have been going back and forth over this for the last month. I have seen the results of the fast 92 being put on an ls6 motor. But have not seen results for the dorman. That I would deem reliable. I believe I am going to pony up and by the fast manifold and sell my ls6 intake then the hit to my wallet will not be as bad.
I to have ls2 silver blade in hand. With Texas speed 224r cam
I to have ls2 silver blade in hand. With Texas speed 224r cam
Last edited by Booger789; Jan 27, 2018 at 07:55 AM.
Burning Brakes
Joined: Oct 2014
Posts: 874
Likes: 107
From: Detroit MI
What are your plans overall? Cam, heads, etc?
My car with BTR Stage 2 cam, Livernois Stage 3 243's and bone stock LS6 intake made 440 whp. A larger intake would just give me more up top, which I don't really want/need.
My car with BTR Stage 2 cam, Livernois Stage 3 243's and bone stock LS6 intake made 440 whp. A larger intake would just give me more up top, which I don't really want/need.
Burning Brakes
Joined: Oct 2014
Posts: 874
Likes: 107
From: Detroit MI
With what you're talking about, the power band is going to be a bit high. Intake will just make it more so. Might be worth 20hp at most.
I suppose if you already have the TB and everything apart, it doesn't hurt as a "while you're there" update, but I don't think it's going to make a monumental difference.
Melting Slicks
Joined: Jun 2002
Posts: 2,591
Likes: 144
From: Mobile al
This.
With what you're talking about, the power band is going to be a bit high. Intake will just make it more so. Might be worth 20hp at most.
I suppose if you already have the TB and everything apart, it doesn't hurt as a "while you're there" update, but I don't think it's going to make a monumental difference.
With what you're talking about, the power band is going to be a bit high. Intake will just make it more so. Might be worth 20hp at most.
I suppose if you already have the TB and everything apart, it doesn't hurt as a "while you're there" update, but I don't think it's going to make a monumental difference.
Burning Brakes
Joined: Oct 2014
Posts: 874
Likes: 107
From: Detroit MI
Correct. But the intake is just going to amplify what the camshaft does, so if you're talking about a bigger high power band camshaft, the intake is just going to make the top end power even stronger.
So it's important to consider the entire package is the point.
So it's important to consider the entire package is the point.
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Team Owner
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From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Agreed, the entire package is a system, runner length on the intake and primary length and side on the header will influence the power curve.
Instructor
Joined: Apr 2014
Posts: 136
Likes: 6
From: Houston Texas
A FAST 90/92 would gain everywhere over your LS6, not just up top. A FAST 102 would gain even more at any RPM over the 90/92.
Burning Brakes
Joined: Oct 2014
Posts: 874
Likes: 107
From: Detroit MI
Instructor
Joined: Apr 2014
Posts: 136
Likes: 6
From: Houston Texas
http://www.ls1gto.com/forums/showthread.php?t=289456
http://www.onallcylinders.com/2014/1...ake-dyno-test/
https://www.google.com/search?q=fast...AZJGU0V_0S2TM:
https://www.corvetteforum.com/forums...-s-t-92-a.html
http://www.hotrod.com/articles/20-ls...ifolds-tested/
It's a superior design in every way, shape and form. LS6 isn't bad, but it's just not nearly as good as a FAST, it only get's better with porting as well. The Dorman LS2 is better than an LS6 as well, since it's a FAST lower with better runners, with minor porting it's shown to be basically a FAST 90.
http://www.onallcylinders.com/2014/1...ake-dyno-test/
https://www.google.com/search?q=fast...AZJGU0V_0S2TM:
https://www.corvetteforum.com/forums...-s-t-92-a.html
http://www.hotrod.com/articles/20-ls...ifolds-tested/
It's a superior design in every way, shape and form. LS6 isn't bad, but it's just not nearly as good as a FAST, it only get's better with porting as well. The Dorman LS2 is better than an LS6 as well, since it's a FAST lower with better runners, with minor porting it's shown to be basically a FAST 90.
Last edited by Whatsa347; Jan 31, 2018 at 04:56 PM.
Thread Starter
Burning Brakes
Joined: Apr 2002
Posts: 1,105
Likes: 114
From: Lawrenceburg, KY
http://www.ls1gto.com/forums/showthread.php?t=289456
http://www.onallcylinders.com/2014/1...ake-dyno-test/
https://www.google.com/search?q=fast...AZJGU0V_0S2TM:
https://www.corvetteforum.com/forums...-s-t-92-a.html
http://www.hotrod.com/articles/20-ls...ifolds-tested/
It's a superior design in every way, shape and form. LS6 isn't bad, but it's just not nearly as good as a FAST, it only get's better with porting as well. The Dorman LS2 is better than an LS6 as well, since it's a FAST lower with better runners, with minor porting it's shown to be basically a FAST 90.
http://www.onallcylinders.com/2014/1...ake-dyno-test/
https://www.google.com/search?q=fast...AZJGU0V_0S2TM:
https://www.corvetteforum.com/forums...-s-t-92-a.html
http://www.hotrod.com/articles/20-ls...ifolds-tested/
It's a superior design in every way, shape and form. LS6 isn't bad, but it's just not nearly as good as a FAST, it only get's better with porting as well. The Dorman LS2 is better than an LS6 as well, since it's a FAST lower with better runners, with minor porting it's shown to be basically a FAST 90.
Burning Brakes
Joined: Oct 2014
Posts: 874
Likes: 107
From: Detroit MI
http://www.ls1gto.com/forums/showthread.php?t=289456
http://www.onallcylinders.com/2014/1...ake-dyno-test/
https://www.google.com/search?q=fast...AZJGU0V_0S2TM:
https://www.corvetteforum.com/forums...-s-t-92-a.html
http://www.hotrod.com/articles/20-ls...ifolds-tested/
It's a superior design in every way, shape and form. LS6 isn't bad, but it's just not nearly as good as a FAST, it only get's better with porting as well. The Dorman LS2 is better than an LS6 as well, since it's a FAST lower with better runners, with minor porting it's shown to be basically a FAST 90.
http://www.onallcylinders.com/2014/1...ake-dyno-test/
https://www.google.com/search?q=fast...AZJGU0V_0S2TM:
https://www.corvetteforum.com/forums...-s-t-92-a.html
http://www.hotrod.com/articles/20-ls...ifolds-tested/
It's a superior design in every way, shape and form. LS6 isn't bad, but it's just not nearly as good as a FAST, it only get's better with porting as well. The Dorman LS2 is better than an LS6 as well, since it's a FAST lower with better runners, with minor porting it's shown to be basically a FAST 90.
The definition of "all over the rev band" is interesting to me. All these dyno charts show noticeable gains starting around 4k RPM and up...just as I said they would. The larger intake means more air volume, which really isn't realized until velocity picks up in higher RPMs.
I don't wind my car out at every stop light, so power 4k+ while awesome, is less useful than more torque between 2k and 4k. An intake won't do that, and this proves it. Just pointing out that "all over the rev band" is somewhat subjective based on driving style. Dyno charts are great, but you spend a lot of time under 4k RPM on the street. This is where forum BS doesn't necessarily translate to the street. If you're racing, an intake is absolutely a good idea.
Not at all debating the merit of these intakes...they certainly flow more and are better designed to take advantage of 4k+ RPM performance. If that's what you're looking for, then right on.
