more pics

 

About 100 years of modern engineering science tells me that any bend in any pipe system with a fluid flowing (air is a fluid) will introduce a loss, easily measurable in the form of a pressure drop. If the bends are smooth, large angle etc the loss is SMALL and in many cases negligible. It's just not the ideal case, that's all.

And no I didn't forget about the SC piping. The ideal case is extremely hard to achieve in the real world given space and engine layout restrictions etc. I'm not saying you can't run a setup like that with piping across the front and not see gains. In all likelyhood the manifold will give you a nicer power curve now (especially up top) than you had before.

I was only trying to help by re-iterating a few things and pointing out some general info for anyone to keep in mind when doing projects like this. Personally, I'd be trying to get as close to the ideal solution as possible. But that's just the way I am. I'd love to always do the ideal solution. But usually the "best" option is the more time consuming and/or expensive one, so many times you have to choose a less-than-ideal alternative. There are always trade offs.

I'm not knocking you for doing this swap at all. I'd love to see some dyno numbers too to go with the pics!

 

 

IMO this was the ideal set-up for us because it wasnt time consuming and was a direct bolt on. if people want to do it another way let them.

 

So how much would you say the IM stuck up above the hood then once the hole was cut? 1 in or so?

 

Scoop looks good! Overall I like the idea and I think it is executed well. The only issue I see are the injectors, but you will figure out what works for you and that is what matters most.

Be sure and post updates when you start tuning and hit the roller!

 

Well looking at the 3rd picture, it doesn't stick out as much as I though it would. Still contemplating on what route I want to go.

 

Yeah that's why I asked how much... it doesn't look like more than an inch or so but the picture could be deceiving.

 

What I find funny is everytime vsamoylov does some engine modification to his car he is always in an arguement with everyoneelse. It's quite amusing.

But good work. Hope for good dyno results. I was looking at the a 350Z forum a while ago and a guy switched from the stock 350Z manifold to the anniversary edition (or now the 2006 350Z) and he gained like 22hp or something like that. But he did lose some torque. Now I know yours isn't the AE or new manifold but you should hopefully still see gains.

 

The MREV has more area under the curve than the REV UP plenum. Vsamoylov and I both have the MREV.

 

actually mrev is when you put the lower part of the plenum on a rev up motor that has 300hp. the lower part of the plenum on the 300hp motor has even shorter runners which is good for top end and that is why the new 350z has a 7k rev limiter on it. so people put the lower part of the plenum from a 287hp motor on the 300hp motor and get gains udner the curve which are like 22hp i believe or something close to that. but that is only on the 300hp motors or as they call it the rev up engine. now if you take the lower part of the plenum from a rev up engine and put it on a 287hp its vise versa.

 

Vsamoylov,

I say nice job in making it work. I'm sure that others will find other ways of making this same mod work on their cars. The scoop actually looks pretty nice on the car. It does take away from the clean lines, but hey...do what you must to gain HORSES....

 

looking at the pics it looks like the throttle body and where it meets the upper are the only parts sticking out of the hood. the rest of it seems like it would fit w/o having to cut a hole in the hood and just removing some of the bracing underneath.

 

it wont close even if you remove the bracing underneath

 

If you cut off the TB and TB bend would it fit or is the plenum still too high?

 

That may be true, but that is still the absolute worst place to run an intake pipe. Just because Stillen did it doesn't make it a good idea. I achieved a 30 deg drop in intake temperature by rerouting my SC intake away from the engine and around the front of the car. That's good for almost a 10% increase in power by a conventional rule of thumb.

 

Lookin good man, I dont think the hood scoop looks bad at all. I really need to measure under the hood of my 6th gen to see if theres room.

 

Thank you. That's what I was trying to point out earlier but I didn't have any numbers to quote.

I do give him kudos though for having the cahones to hack the hood up and do the swap. Many wouldn't.

 

anyone care to say what the advantage is to having this intake manifold compared to others...?

 

ever notice how the 350z makes 287hp and the maxima makes 255 with the same engine?

 

also that I heard they operate at 105% volumetric efficiency, and anything over 100% is considered "forced induction"

 

that means you hit boost N/A....lol

But Vasily, did you have to use the 350z coilpacks, or did the FWD ones bolt on? Also, what dimensions are the scoop? i'm going to order one on ebay, and I wanna know how big it needs to be.

thanks alot, you've been a great help so far

 

Yeah odd. But the G sedans and coupes all had the same intake manifold until the 2005 6MT rev up engine was introduced (lower plenum had shorter runners). The G and Z both shared the same manifolds I believe

The 03 Sedans had 260hp with this plenum style intake manifold.

So I'm not quite sure where the hp differences are. But from what I've seen for stock/modded 3.5VQ dynos, I think the maximas were under rated. I think anyway.

 

don't the 350z and g35 come w/ a more aggressive cams than the maxima? Also alot of that difference could be ECU related (more advanced timming timming) and maybe difference in exhaust form the maxima

 

could it have been the way of rating hp was corrected? The G sedan and G coupe did not have the same weight, and were two totally different classes of cars, so take that into account as well.

I dont know why the difference is, but i'm sure the G manifold makes alot more power than the stock FWD manifold

 

I always wonder what exaclty makes the differences of power between the models

comming soon to a forum near you : The nissan's 3.5 and all his secret

anyway i like the thread,, its good

the hood looks cool because of that underneat but definaly not sleeper

 

FTW I bet next crasy mod is gonna be a vq40 IM swap ...

5 bux says it pwnts all other IMs

 

That is the question....

 

The thing is all these plenums starve the front 3 cylinders (except for the Rev up engine). So in order to get the best performance, you are looking at a spacer or Crawford/Kinetix etc... But there might be one option. There's one spacer that's angled I believe. ie.. thick in front and thin at the rear. If it lifts the front, it MIGHT angle the rear of the manifold enough to make the rear clear the hood. Don't know about the tb neck. I also don't know how tapered the spacer is. It might also lift the whole plenum up some too. Just a thought

 

Ask yourself this Jeff....after reading the SAE tech doc on what Nissan engineers went through to achieve 105% VE on a NA manifold, do you think they would purposefully have done that?

IMO, it is BS. The companies that sell the spacers claim that is the reason their spacers make more whp, however maybe just adding more plenum volume is the reason, not the "equal distribution" to all 6-cylinders?

What was the reason they say Nissan did that? Strutbar clearance? The spacer still fits under the hood, so I'm guessing strutbar. I just can't imagine Nissan doing all that testing on an engine stand, publishing how awesome a job they did, and then once they went to put it in the car they scrapped it for the strutbar.

 

Looking closer...you'd still have to remove the underhood bracing.

 

Icy Wangster. Here's some dyno proof: yes this is from a maker but the tests were performed by Sports Z magazine. I picked up a CrawfordZ Plenum myself. The MREV mod for the 298hp Rev motor is pretty impressive also

http://www.motordyneengineering.com/dynos.asp

Plenum K is Kinetix Plenum C is Crawford

 

Are the MD's stand for Motordyne? If soo... Then !!

Is it a hp dyno or torque dyno.....

And what does it mean by shifting from 3rd gear redline to 4th gear redline......

 

I believe so. Their 5/16" spacer out performs the replacement plenums. Amazing

 

He doesn't need to post that. He got a 4th gen with a 5.5gen motor with a 6 speed and a ecu too. Plus the car is lighter than the 5.5 gen. Nodody is ahead of you, I haven't seen any other 12.8 NA maximas.

 

^you shush!!!

 

I know you didn't dyno yet, but do you feel a power increase?

 

dyno will be very soon. i want to see myself how much it will put down and i dont have alot of mods either so it will be pretty close to stock. well the only mods are the exhaust and the apexi air filter but everything else is stock on the car. but to whoever asked about the power increase yes i can feel it. it feels like a vi when it is open. it just keeps pulling and pulling and i really dont feel a loss at the bottom like i thought i would.

coil packs were never changed out and the question of if the neck was cut off and welded differently and then if the hood would clear, that would be a no.

and yeah a spacer is going to be the next mod and maybe later down the line some headers as well.

and a thought about the hp ratings and how they are all different. who knows what is different. personally i think nissan is lying on some of these hp ratings.

 

make sure you get a A/F reading, at least i would.....

 

at increased area under curve with 1/2" spacer...