I have a 1g 6bolt and i'm trying to figure out why can't i use jmf 2g intake manifold on my 1g? call me retarded but on the magnus you don't have to specify whether it's 1g or 2g just the throttle body you're using. And plus jmf says to use the 1g tb! So what gives? I noticed that the 2g smim looks alot like the magnus which flows better and that is what i'm looking for. So why couldn't i use the 2g manifold on my 1g 6bolt?

Thanks in advance

Yes you are a tool, do you not know that the 1g has a different head than the 2g?? And they have different intake manifolds.

Hence the different head. So the larger ports on your 1g head will not match up with those of the 2g manifold intake manifold.

Just curious, but why can't you just get the 1g intake manifold?

aha!

gSx_r1der pointed out the obvious. Feel free to delete bc of my newbieness.

kevingst - The magnus intake manifolds were all designed the same and i've heard that style (slopes down in the rear) flows better or more equally which is why i wanted that style.

Magnus makes a differnet manifold for the 1g and the 2g just like JM Fab, the port sizes are totally different.

CanadianTSi said:

Magnus makes a differnet manifold for the 1g and the 2g just like JM Fab, the port sizes are totally different.

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Damn canadian I havent seen you in a min. Its been a while since I have been on and hell I remember you back in the day, I used to think your car was soooooo cooooooool. That was back before I got my gsx. Good sh1t man, I see you've added a few things to the repertoire.

A tapered plenum is not ideal.

raped said:

A tapered plenum is not ideal.

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Sure it is, just for our cars it makes it impossible to to use a tapered plenium and have the volume needed for optimum distribution with big power/high rpms.

Ideally the plenum should be as close to spherical as possible, this is not always practical due to space. The Ams vsr manifold is arguably the best manifold available for a dsm.

Have you looked at DV/DT Fab's manifolds? His are better imo and customizable for your application.

definitiveno said:

Have you looked at DV/DT Fab's manifolds? His are better imo and customizable for your application.

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Not to argue but his runner design is not optimal. Fluid dynamics are not and should not be the underlying principal behind runner design. A short runner with an extreme taper is far from optimal.

I could have sworn thats how the buyer asked him to make them, if you read he says that it is all customizable for your car, from runner leangth and taper, to plenum design and volume, and whatever TB you can fathom putting on there. You tell him how and he'll put it together for you.

definitiveno said:

I could have sworn thats how the buyer asked him to make them, if you read he says that it is all customizable for your car, from runner leangth and taper, to plenum design and volume, and whatever TB you can fathom putting on there. You tell him how and he'll put it together for you.

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Maybe it was a buyer that asked him to make it with an extreme taper. I don't know for sure.

Shep runs the AMS VSR. thats all i need to know

outlawdsm said:

Shep runs the AMS VSR. thats all i need to know

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Holy generic post batman. I think I wanna roll what brent rau is rolling anyway, rwd conversion here we go......



Now for any one reading this, find one post where I took anything away from AMS's manifold. All I am saying is that theyre not the only ones in the businesws of making good manifolds. basically if you are choosing one of the most expensive manifolds on the market, you probably know exactly why, runner design and plenium capacity, make sure and run that by albert and he can put it together the same way too. Not nut swinging, however I am loyal to those who do good business and albert has sold me an awesome intercooler and given adequate customer/technical support.

raped said:

A tapered plenum is not ideal.

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Lets back this up with some facts mang. Generalized statements like this help no one.

TSIMonsteR said:

Lets back this up with some facts mang. Generalized statements like this help no one.

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All of the information is out there. Do some research on intake manifold design. You are not trying to acheive fluid flow of the air into the runners so much as you are trying to acheive a large volume of air for each runner to pull from when the the valves from that cylinder are open.

I want the AMS VSR but I don’t want to take the head off the car to port match the mani, or else id be sporting one. AMS is top notch, but with the release of the Evo I don’t see them catering to the DSM’s as much which kind of makes me sad

definitiveno said:

Holy generic post batman. I think I wanna roll what brent rau is rolling anyway, rwd conversion here we go......



Now for any one reading this, find one post where I took anything away from AMS's manifold. All I am saying is that theyre not the only ones in the businesws of making good manifolds. basically if you are choosing one of the most expensive manifolds on the market, you probably know exactly why, runner design and plenium capacity, make sure and run that by albert and he can put it together the same way too. Not nut swinging, however I am loyal to those who do good business and albert has sold me an awesome intercooler and given adequate customer/technical support.

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I bet your slow, huh? Thats what I thought.

raped said:

All of the information is out there. Do some research on intake manifold design. You are not trying to acheive fluid flow of the air into the runners so much as you are trying to acheive a large volume of air for each runner to pull from when the the valves from that cylinder are open.

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To add on to this; Pressurized air acts as a fluid in and of itself. You do not need to try to fluidize air with a taper in a manifold, it will flow to the area of less pressure reguardless. In a naturally aspirated engine, a tapered manifold is great to help that last cylinder get air by increasing its velocity, but the turbo takes care of that in our case. A plenum with equal volume over each runner is what you should strive for for maximum airflow.

Damn, talk about threads from the dead. I'm almost embarrassed I asked that question. Alot has been learned since then....

I went with the 1g JMF manifold btw

Boosted98gsx said:

To add on to this; Pressurized air acts as a fluid in and of itself. You do not need to try to fluidize air with a taper in a manifold, it will flow to the area of less pressure reguardless. In a naturally aspirated engine, a tapered manifold is great to help that last cylinder get air by increasing its velocity, but the turbo takes care of that in our case. A plenum with equal volume over each runner is what you should strive for for maximum airflow.

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Air doesnt just act like a fluid when it pressurized, it always acts like a fluid, because it is a fluid.

outlawdsm said:

Air doesnt just act like a fluid when it pressurized, it always acts like a fluid, because it is a fluid.

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Yes and I actually take back what I said about the tapered plenums for NA motors. Also needless. Pressure is still pressure, it may be atmospheric, but air is flowing for a reason. Tapered plenums should be avoided no matter what engine. Only 1 cylinder is open at a time, why hinder flow with less air over the runner.

outlawdsm said:

I bet your slow, huh? Thats what I thought.

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hehe, and your posts are oozing intelligence or a complete waste of internet space, readers will decide.