Any conclusions about whether going with the upper plenums or the lower plenum that comes on the 05's is better? I hear you can't sucessfully use both. What about the new lower plenum with mods added? SG

 

You lose power with the 300HP lower plenum. You won't with the upper plenum. A combination of both hasn't been tried IIRC.

 

Why would you lose power with the lower plenum since this is one of the ways they spiked the 05? You need the other mods on the 05 for correct tuning to take advantage of the lower plenum? Performance Nissan is selling these plenums as a performance gain for the earlier 350's. SG

 

lower plenum will gain you some power if you're able to rev past 6600

but I'd rather get the kinetix SSV plenum anyway - way more functional

weighs 12 lbs less
can do direct nitrous injection
can access engine parts easier
more hp/tq gains
looks better - you can see it, can't see the lower 05 plenum
probably sounds more aggressive

but it's over over 2.5x the price....
however not much more than a crawford cast upper plenum in addition to a 05 lower plenum

 

OK. Is this the latest version of the Kinetix Plenum or something new altogether? I can't keep up. How much, who has best price, how much gains etc? I'll do a search if i can find where they hide it these days on this site. I usually have a hard time finding exactly what i want when searching anyway.

 

https://my350z.com/forum/intake-exhaust/117236-new-intake-manifold-long-awaited-with-pics.html

 

The 2005 300HP model has more than just a lower plenum, which is why the lower plenum actually contributes HP instead of not contributing (like it does on the 287HP model).

 

I would wait for APS' inlet manifold, 350EVO also is coming out with an inlet manifold (which means it will be geared towards N/A). Kinetix just failed on their's...JMO.

 

but didn't kinetix say all along that the new manifold was built primarily for fi?

 

JMO...Kinetix could have used a cheaper material to keep the cost down (and still get the look they wanted by polishing, maybe even getting the same HP by polishing) and the design is not even near perfect. Heck, the F/I gains were a dyno operators mistake (unintentional).

 

well regardless of the gains or not, it still is

12 lbs lighter
direct port nitrous capability
easier access to surrounding engine parts (especially the throttle body)
looks cool
sounds mean


I can't see the APS plenum gaining significantly more - main benefit is the ability to use additional fuel injectors if I remember right

350EVO will be awhile before theirs is ready - and when it is, is geared towards NA which is good if you are and plan on staying NA

the SSR manifold is really expensive and I'm not sure I've seen any dyno numbers on it yet

the regular kinetix plenum can crack

the crawford isn't really THAT dramatically better than stock

 

APS has a upper intake plenum and inlet manifold coming out. They are not the same thing.

Sharif is doing testing with the SSR manifold, i've heard from F/I experts that SSR has the best design so far.

Eh, not too many problems with V4's, though the design, IMO, is ugly.

I agree, especially for the price.

 

So this "SSR" manifold is geared strictly towards F/I? What would be the best solution coming for NA people. I've been having my eye on 350EVO but they make it sound like I need to buy their whole kit (intake, TB and Intake Manny) for it to work. I really hope they dont make it (the intake) exit out front of the motor like some are suggesting. I like my intake and wouldn't mind adding a throttle body and intake manifold to it as long as the gains are nice.

 

can you do direct port nitrous on the SSR manifold? Looks like a tight fit, but I don't know enough to say.

I agree the SSR has 1 less bend in the air flow direction so that's good.

I don't like how it looks as well as the SSV, but still looks nice.

Hmm, I dunno - no one's posted a before and after dyno of the SSR. All we have to go off of is what their site says: " Tested on our G35 we have made 402WHP @ 6.4 PSI with help from our manifold (Stock motor, cats etc.)"

http://www.ssr-engineering.com/produ...intakemani.php

I might decide to sell my SSV for the SSR if it really is that much better for FI, but not sure yet. I'm sure someone would be willing to reimburse me the $725 I paid for the SSV (still haven't gotten it yet)

Did they just lower their price on the SSR? I swear it used to be like $1200

 

I don't think the Kinetix SSV intake manifold is geared towards anything since the gains aren't that good with either N/A or F/I. The SSR-Engineering/Speed Force Racing intake manifold I don't believe is geared towards anything either. I haven't seen any dyno's for it so i'm not sure.

I would say 350EVO would be the BEST choice for N/A.

 

Sharif plans on doing testing with it, so we'll see, Kshep also is on the waiting list for one.

I'm not sure, I thought it used to be higher, but it's been at that price for a few months now.