Intake manifold
Thread Starter
Pro
Joined: Jan 2017
Posts: 638
Likes: 70
Intake manifold
Been looking into a fast 92/90 combo and came across the dorman ls2 intake. Supposed to be like their ls6 intake but with a 90mm opening. Anybody have expirience with this?? Can't really beat the price! Part number 615-901
Burning Brakes
Joined: Jan 2006
Posts: 788
Likes: 105
From: Olathe Kansas
The 615-900 is the LS6 Intake ( 2001 later LS1/Ls6)
I am going to use this one on my 2000 as the real LS6 -2001 & On
Intakes are getting hard to find.
I've read up on it and if I do a little cleanup on it, it should be close to LS6 intake.
So, better than my LS1 !
I am going to use this one on my 2000 as the real LS6 -2001 & On
Intakes are getting hard to find.
I've read up on it and if I do a little cleanup on it, it should be close to LS6 intake.
So, better than my LS1 !
Thread Starter
Pro
Joined: Jan 2017
Posts: 638
Likes: 70
I was planning on using an ls2 tb. The more I read about it looks like fast 78 runners with 90mm opening. Probably could do a little porting too. Just hard to make a decision. I can get the manifold and ls2 tb for 675.
Melting Slicks
Joined: Feb 2001
Posts: 2,797
Likes: 356
From: Northville, MI
You might also need intake gaskets, tune, etc. Going to a larger TB only slows down the air going into the Intake. Unless you are making north of 450 FWHP, it is of little value. The 2001+ intakes over 750 cfm and is good for the standard and Z06 engines. On a bone stock 2000 with just Veraram you would gain almost nothing by making a change.
Engines can only run at their optimal efficiency if they have very precise data on the amount of air flowing into them. Although most people think of air flow into an engine as fairly continuous, it really is not. The opening and closing of valves and reciprocating nature of internal combustion engines means the air flow is really a series of pulses which make measuring the exact flow challenging.
Engines can only run at their optimal efficiency if they have very precise data on the amount of air flowing into them. Although most people think of air flow into an engine as fairly continuous, it really is not. The opening and closing of valves and reciprocating nature of internal combustion engines means the air flow is really a series of pulses which make measuring the exact flow challenging.
Le Mans Master
Joined: Mar 2006
Posts: 5,775
Likes: 585
From: Texas
There's a real good thread on this on LS1Tech. I'm building a stroker and this sure looks like a cost effective alternative to anyone not looking for every last horsepower.
Last edited by sstonebreaker; Mar 16, 2017 at 09:54 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
Instructor
Joined: Jun 2014
Posts: 189
Likes: 20
I was wondering the same thing. LS2 throttle body will bolt to it. The bottom half looks just like the FAST intake. Most important, a hell of a lot cheaper than the FAST setup.
Thread Starter
Pro
Joined: Jan 2017
Posts: 638
Likes: 70
I ordered it, came in the mail yesterday along with my LS2 throttle body. Going to clean up the runners and throttle body with the dremel. I won't know more til I hit the dyno but I'll keep you informed.
Instructor
Joined: Jun 2014
Posts: 189
Likes: 20
Awesome! Yes, please let us know how it looks and how the install goes. If everything goes ok I think I am going to pull the trigger on one as well.
Burning Brakes
Joined: Oct 2014
Posts: 874
Likes: 107
From: Detroit MI
I was going to go this route myself, but why are LS2 silver blade throttle bodies so expensive? Used ones seem to sell for $250...new are well over $300 whereas the gold blade TB's (that won't work with our old cars) are $150 new.
For $650, I highly doubt you'll get the bang for the buck, but I'm curious to hear how it goes.
For $650, I highly doubt you'll get the bang for the buck, but I'm curious to hear how it goes.
Intermediate
Joined: Dec 2016
Posts: 33
Likes: 4
I am looking into going with a Dorman intake as well, but had some questions.
The previous owner of my '99 vert had installed an LS6 throttle body, which looks like it is ported to 90mm (by my crude measurement with a ruler). Currently bolted to the stock LS1 manifold though, so I can't imagine there are any gains other than throttle sensitivity.
My question: given my TB is 90mm, is there any advantage to going with the Dorman LS2 manifold (90mm opening) vs. the Dorman LS6 manifold (73mm opening)?
If I went with the LS2 option, I would have to get an adapter plate that would allow me to mount the 3-bolt throttle body...but I would get the full 90mm opening. What do you guys think? Are there even any high-quality adapter plates out there with 90mm or greater openings?
The previous owner of my '99 vert had installed an LS6 throttle body, which looks like it is ported to 90mm (by my crude measurement with a ruler). Currently bolted to the stock LS1 manifold though, so I can't imagine there are any gains other than throttle sensitivity.
My question: given my TB is 90mm, is there any advantage to going with the Dorman LS2 manifold (90mm opening) vs. the Dorman LS6 manifold (73mm opening)?
If I went with the LS2 option, I would have to get an adapter plate that would allow me to mount the 3-bolt throttle body...but I would get the full 90mm opening. What do you guys think? Are there even any high-quality adapter plates out there with 90mm or greater openings?