What do ya'll think about this Intake manifold

[blurrbosi]

I know its been asked before, but i'm kinda new. Has anybody used this? Any reviews? 270 for an intake manifold. Thats awsome.

http://cgi.ebay.com/intake-man...wItem

Also, whats the procedure for buying things from AU? I know they have gobbs of RB stuff there.

[Sil240]

Its a Chinese knock-off.take a look at the Location of the item.

I dunno, people say its Poop.But if its a exact copy and it fits then it does what it does. Other than using crappy materials/processes to make it.

You get what you pay for.Just remember that.

[240z4u]

I would like to see flow numbers on that manifold, makes me concerned cyl. 6 could be going lean due to poor flow design.

I guess I wouldn't rush out to buy a cheap copy manifold just for looks. I hate my crossover intake, but not enough to risk it with a crappy knockoff.

Is there anyone out there who has a flow bench available to them??? I would LOVE to see a flow test on one of these.

Evan

[Sil240]

I've heard that the Greddy leans out the 6th cyl too anyway.Or is it JUST the stock RB26 manifold??

The only manifold that doesn't do so is this guy:

[002-M-P]

I heard the same...glad I didn't dump my cash on a Greddy unit now

[minivan_don]

I've heard that the Greddy leans out the 6th cyl too anyway.Or is it JUST the stock RB26 manifold??

The only manifold that doesn't do so is this guy:

its the stock rb26 under more than stock boost levels ... not the rb25.

the nismo mani you have there is for the rb26


Modified by minivan_don at 6:16 PM 4/5/2007

[blurrbosi]

I'm reading up on it in SAU but I can't seem to get solid opinions.

You get what you pay for is right, but I have also heard of the Greddy plenum leaning out cyl.6 as well. As for this design of the knock off, it looks as is cyl.6's runner and flow space is a little less than the others... There is also talk of the coolant flow leaking into cyl.6 and hydrolocking.... but they said it was in that batch... hmm

I will have to make a decision soon as I will be putting the motor in soon and would hate to do it twice.

[roadrunr]

Hmmm! I don't know about that, I am interested but would also like to see flow charts. and is there a way to richen up cylinder 6 using Consult or something similiar? Or maybe porting the manifold a little. I guess if your going to go to all that trouble you might as well get a good one, but if this one works OK, I would try it. I don't plan on doing anything to my motor except intake, exhaust, injectors and probably MAF just to get it breathing better and if it makes 300 to 325 RWHP, thats cool with me. Thanks for posting this, I'll see what I can look up about it, but hopefully someone here will post some real world info about these.

[Chaos the Xile]

Yeah they look so tempting, I want to buy one just to push the envelope with it.

[s13point5]

Yeah they look so tempting, I want to buy one just to push the envelope with it.

i thought you had a aftermarket IM on your motor? i sent you a email but i guess you didnt want to answer me

[s13point5]

oh and i know a couple of the local 240 boys around here has bought the "freddy" intake manifolds as we like to call them and are very unhappy with the casting. one of them even had to resurface the flange to get it to sit flush on the IM gasket/head. we put my greddy IM for my RB25 next to my buddy's freddy for his SR and the casting was night and day. we did use a precision straight edge and checked his manifold flange and it was flat so he didnt have to get it resurfaced. my greddy was also flat but i have yet to hear of any greddy units having to be resurfaced. i have heard of the 6th cylinder leaning out on the Greddys but i thoguht that was only for the RB26

[Carl H]

the inherent design of a front facing plenum on any straight 6 motor will tend to lean out the cylinders farthest away from the tb.however each manifold is diffrent, on my RIPS manifold it appears that number 5 gets the most air as it had the most damage when the motor blew (hole in piston).idealy with any front facing plenum you will need to richen up the mixtures going to those cylinders to keep egt's decent, on the power fc you can do this but on a stock computer you cant.if running stock computer put the highest flowing injector in #6 and work your way down.

[Sil240]

Carl with the Power FC you can adjust fuel in each individual cylinder???

[rotorimp]

Someone explain how the design of the plenum can effect/cause a lean condition when it is port fuel injection?

[Eikon]

Someone explain how the design of the plenum can effect/cause a lean condition when it is port fuel injection?

That's what I'm trying to wrap my head around...

???

This thread is saying that the #6 may not get as much air as #1 right?? So if #6 gets less air.. won't it get too much fuel for that amount of air and actually run rich?

Carl.. can you clarify this for us.

[Darius]

What happens is the air is flowing in a direction 90-degrees to the runners. Each cylinder pulls off a certain amount of air, but as you get to the back of the plenum at high rpms, it is difficult to get the air to turn 90-degrees. Any excess air is forced some into #5 and mostly into #6 because it has nowhere else to go. That is why you typically see lean conditions in the rearward cylinders and why Carl is saying his motor blew on #5 instead of say on #1. Obviously the stock plenum will not do this since the air is distributed between the #3 and #4 cylinders.

No. You can't tune individual cylinders with the PFC. You would have to base your tune around the #6 cylinder if you had EGT sensor info to be on the safe side.

[gawdzilla]

No. You can't tune individual cylinders with the PFC. You would have to base your tune around the #6 cylinder if you had EGT sensor info to be on the safe side.

You can a bit by biasing the fueling % for the cylinders, but its a very gross adjustment. I think I ran my cyl 5 1.5% richer and cyl 6 3% richer... made me feel a bit better but probably wasn't doing anything. On top of that, when I got my injectors cleaned and flowed I put highest flowing ones towards the back like Carl said

[Sil240]

Darius I was actually talking to a guy at Speed & truck world last weekend.A guy from the UK.He was saying what people were doing was cutting open the stock upper plenum behind the T-body and would put in two curves.One toward the front of the engine and one towards the back.It was supposed to help distribute the air flow better.

The best thing to do would be to run 6 Egt's or even better 6 o2's lolBut that's crazy insane amount of $$ plus you need a Stand alone to tune individual cylinders.

Also another reason why the 6cyl blows i've heard is because its the hottest and the farthest cyl from the water pump.That's why guys do that cooling mod where they tap the mani and run a hose into the rad I think.

[Darius]

I could see that helping get better distribution among all of the cylinders. But, it seems like a lot of work just to keep the long cold-pipe right over the engine.

Yeah check out the head cooling modifications that kjlindgr has done to his RB26 and you'll understand. He has about $250 in fittings alone

[Chaos the Xile]

i thought you had a aftermarket IM on your motor? i sent you a email but i guess you didnt want to answer me

I do but I have a leak and it sucks, it one of the plasmaman units. I want a Greddy unit or equal.

[blurrbosi]

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Modified by blurrbosi at 5:50 PM 4/6/2007

[rotorimp]

So based on the dynamics of the plenum more air gets sucked into #5. I don't see it on the plugs? Does anyone else see rich and lean conditions on #5 and #6?

[Darius]

You shouldn't see rich and lean. You should see #5 and #6 being leaner than #1 and #2, that's all.

[Sil240]

One of the guys on SAU is going to be testing a Ebay Freddy ITM (fake greddy)

Keep an eye out if your interested.

http://www.skylinesaustralia.c...63670

[blurrbosi]

I got my eyes on it as we speak.... Good info in here.!