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Smic For R33

Kennedy

By Kennedy,
in Engines & Forced Induction

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Kennedy Mentor

Kennedy

Posted
Posted

Hey Guys,

I'm pretty sure that for my next mod I want to replace my SMIC rather than go the full FM.

I've seen a company called ARC that make an aftermarket SMIC which is apparently 30% bigger than stock. Are there any other manufacturers out there that have a similar product?

Pretty my I just wanna fit the largest SMIC in using the existing piping

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paulr33 Grand Master

paulr33

Posted
Posted

is it a case of the stock SMIC is not good enough or the stock position is not good enough. Is there enough airflow to the core with 200rwkw, as around that level on stock rb25 is a higher level of stock boost, which i would presume heat up the intake charge, so you would want the SMIC doing the best it can, just wondering if its able to do so in the stock position

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wolverine Grand Master

wolverine

Posted
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paul, the advantage of the SMIC is that you have unimpeded airflow thru to the wheelarch and no hot radiator sitting behind it. a relatively short pipe run back helps response (which i reckon i can feel now i have an FMIC)

the disadvantage is the surface area to volume ratio isn't as favourable (vs FMIC) for heat exchange in the space. the trust unit has plenty of scope to go > 200rwkw.

given the cost of installing a FMIC vs SMIC they are a viable option for folks looking for good streetable power.

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MANWHOR3 Proficient

MANWHOR3

Posted
Posted

Paul r33. The problem with the stock smic is not the positino. It's fine. It's nicely ducted. There are two problems with it:

1. it's restrictive. That is, the cross sectional area is small, so it doesn't flow very well at high boost. That's why it's common to have a 2 psi drop at 12 psi. at stockish boost (like 8psi, it's not noticeable).

2. It doesn't cool very well. This is becaause it's so small. Need I say more?

A larger smic, is both thicker, taller and maybe even wider. I have an r34 smic. It's 20 mm thicker and I think about 1 inch taller (from memory, so someone correct me if i'm wrong).

It has been worked out that the cross sectional area is 60% better, so it should be less restrictive. Furthermore, the extra thickness and height means it has more cooling surgace

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Kennedy Mentor

Kennedy

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Thanks Guys. Gonna go sound mount then. I still have the stock airbox aswell and thinking about replacing it with a pod. Would that just be a waste of time considering I won't have the CAI that I would get if I was running a FMIC ? Would the POD/SMIC combination be a crappy combo?

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