Holgram's GS350 'White Pigeon'
Intermediate
Joined: May 2015
Posts: 447
Likes: 70
I am hoping DickH will also put his input.
His designs are with very long runners designed to make power in the midrange where you want it.
His runners are like 12 times or so as long.
I see the runner now you are right, they are meant for a turbo.
I am working a lot these days, but once I get back I will definitely contact them about this intake manifold.
It looks like the runner length could be adjustable.
His designs are with very long runners designed to make power in the midrange where you want it.
His runners are like 12 times or so as long.
I see the runner now you are right, they are meant for a turbo.
I am working a lot these days, but once I get back I will definitely contact them about this intake manifold.
It looks like the runner length could be adjustable.
My runners are longer, maybe twice the length. This manifold isn't very well thought out and would not be a good match for a na car. This manifold has the "turbo manifold" look to it but the oem manifold would likely make better power with a turbo than this manifold. There's also the issue of fitment, I'd be surprised if this could be setup to fit inside an oem hood. Height wise it might be close, but there's no way to fit a forward facing intake and flipping it will result in a tight fit that might not be feasible.
Holgram, I'll send my cad files for metal 3d printing as well as offering support if you become too desperate for something not the oem manifold and my schedule doesn't free up for me to continue working on production anytime soon.
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Pit Crew
Joined: Apr 2024
Posts: 151
Likes: 81
From: Arizona
He guys looking more at this design, it does seem quite bad for an NA build compared to DickH's nonfunctional prototypes he sent me. Larry said this too.
For an NA car this manifold could even be a downgrade from the ported OEM manifold.
Another excellent fabricator said: "The runner entrances are not ideal, runner lengths are way too short, the transition into the plenum from the throttle body is not ideal, there's no effort in the geometry to encourage even cylinder filling, plenum height might be too tall for fitting under the hood, and if you do get it under the hood you won't be able to run anything to the throttle body without severe compromise in something."
So I will continue waiting for the DickH magnum opus.
For an NA car this manifold could even be a downgrade from the ported OEM manifold.
Another excellent fabricator said: "The runner entrances are not ideal, runner lengths are way too short, the transition into the plenum from the throttle body is not ideal, there's no effort in the geometry to encourage even cylinder filling, plenum height might be too tall for fitting under the hood, and if you do get it under the hood you won't be able to run anything to the throttle body without severe compromise in something."
So I will continue waiting for the DickH magnum opus.
Thread Starter
Pit Crew
Joined: Apr 2024
Posts: 151
Likes: 81
From: Arizona
I don't mind waiting buddy. I really enjoy working with you. You are truly a legend.
Intermediate
Joined: May 2015
Posts: 447
Likes: 70
He guys looking more at this design, it does seem quite bad for an NA build compared to DickH's nonfunctional prototypes he sent me. Larry said this too.
For an NA car this manifold could even be a downgrade from the ported OEM manifold.
Another excellent fabricator said: "The runner entrances are not ideal, runner lengths are way too short, the transition into the plenum from the throttle body is not ideal, there's no effort in the geometry to encourage even cylinder filling, plenum height might be too tall for fitting under the hood, and if you do get it under the hood you won't be able to run anything to the throttle body without severe compromise in something."
So I will continue waiting for the DickH magnum opus.
For an NA car this manifold could even be a downgrade from the ported OEM manifold.
Another excellent fabricator said: "The runner entrances are not ideal, runner lengths are way too short, the transition into the plenum from the throttle body is not ideal, there's no effort in the geometry to encourage even cylinder filling, plenum height might be too tall for fitting under the hood, and if you do get it under the hood you won't be able to run anything to the throttle body without severe compromise in something."
So I will continue waiting for the DickH magnum opus.
Thread Starter
Pit Crew
Joined: Apr 2024
Posts: 151
Likes: 81
From: Arizona
All Larry said was that it was very well designed, and that the taper was perfect.
He was impressed and said that I see a lot of intake manifolds, and that this one looked extraordinary.
I can ask him for more feedback but just for runners I think that's pretty OK.
It kind of sucks that his engine dyno is set up only for American V8s so that I can't use it.
But I will dyno it on AWD wheel dyno.
He was impressed and said that I see a lot of intake manifolds, and that this one looked extraordinary.
I can ask him for more feedback but just for runners I think that's pretty OK.
It kind of sucks that his engine dyno is set up only for American V8s so that I can't use it.
But I will dyno it on AWD wheel dyno.
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Holgram
GS - 4th Gen (2013-2020)
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Jun 8, 2025 01:41 PM
