Is Magnus SMIM my mistake?

[Project91Tsi]

Ok, I've got my mods listed in my profile, may have forgot that the walbro 255 has been rewired.
Getting ready to drop in the new Ross/Eagle combo on the motor build, and came across a Magnus street SMIM for cheap and added it to the build. I love the cleaner look it gives the install, but I've been reading that these SMIM's can cause both a reduced airflow to cylinder #4, as well as a huge loss of torque/midrange for cars with a 16g. My question is that, with my big 16g, clipped and ported, as well as Jackson Auto race head, 264/272 combo, am I putting on an intake that is geared towards a much higher airflow turbo? I know my goals are very high, but I am shooting for very low 11's and trying to tweek 10's without NOS. Looking for some advice on whether I should ditch this mani for a honed 2g, or if it will give me the top end I need for my goals even with a smaller turbo. Thanks

Oh yeah, this IS going to be tuned with ECMlink with wideband, and will be running 104 race fuel. Thought I should mention that, as this is NOT a dd.

 

[LiquidX]

They say the magnus suffers in low end power.I took my stock manifold and ported and polished it had great results but at the same time they cant hold a rediculas amount off boost either .Building your own is probly the best.

What cannot take a lot of boost? Please explain when you say something like that. Building you own would have diminished results unless you have a flow bench (like Magnus) to see how the airflow is.

 

[Project91Tsi]

to LiQUiDx, I appreciate you looking out for bad responses. That being said, I can tell a legitimate answer vs. "build you own" . I do appreciate it tho, seeing as I'm still a "newbie"
That being said, I was referring to such debates about the Magnus such as this

http://www.dsmtuners.com/forums/bol...flect-gold-wrapped.html?highlight=magnus+smim

Hope I copied that link right. My point is, one of the DSM wisemen started really dogging on the magnus intake, and the last thing I want is another toasted motor. I'm looking for someone who has run a similar setup, with good or bad experience, or someone who can provide some data as to if I am making a big mistake.

Thanks for looking, it's much appreciated!

 

[deweese46]

true you do need a flow bench to build your own but it was just a suggestion .

 

[richard33]

to LiQUiDx, I appreciate you looking out for bad responses. That being said, I can tell a legitimate answer vs. "build you own" . I do appreciate it tho, seeing as I'm still a "newbie"
That being said, I was referring to such debates about the Magnus such as this

http://www.dsmtuners.com/forums/bol...flect-gold-wrapped.html?highlight=magnus+smim

Hope I copied that link right. My point is, one of the DSM wisemen started really dogging on the magnus intake, and the last thing I want is another toasted motor. I'm looking for someone who has run a similar setup, with good or bad experience, or someone who can provide some data as to if I am making a big mistake.

Thanks for looking, it's much appreciated!

I haven't run this setup before, but I will tell you your engine is safe no matter what IM you pick. It may hurt your performance but will not hurt the motor. If you already have it I would throw it on. The street version is pretty small anyways and should be more geared towards smaller turbos.

 

[Project91Tsi]

Thanks for that. Not trying to sound paranoid, just want as much info as I can get before burning up a cylinder on a fresh motor. Still wouldn't mind hearing from some people who have a Magnus SMIM on their car with no problems, but at least it's a little peace of mind.

 

[talonryder]

On my built 6bolt, i ran a evo 3 16g turbo with a Magnus SMIM for almost two years at 23psi without any issues. I now will be running a 57trim when it comes back from being rebuilt but i have no complaints with my Magnus intake manifold. I would prefer this over stock anyday, the boosted power increase overcomes all the "negative" differences this intake will do. I wouldn't worry about burning up your motor due to the intake and rather worry A LOT about tuning correctly.

 

[400hp93talon]

Just going to throw this in there.... The stock manifold will hold more boost than the street SMIM's..... Eventually with these you will have cracks/breaks in the welds(which is probably not going to happen with your build running a 16g) but from what I have seen is that STREET SMIM's are just for looks and dont really perform any differently and are less reliable. Thats just my two cents based on what I have heard pro builders and tuners say!! Now DRAG manifolds are a completely different story they are built to PERFORM and look cool!!

 

[boostNmetal]

Magnus has a new cast IM out. Magnus Motorsports » Blog Archive » Magnus V3 Cast Manifold Pre-release Special

 

[Project91Tsi]

Well it sounds like I'll be ok with it, other than giving up a little bit of mid-range, so I'll run it and see how it performs. Sounds like I won't be starving a cylinder of air, at least with my mods so far. Thanks.