Perhaps an unintentional ebay scam? "nismo" intake plenum

[gawdzilla]

was surfing ebay, and found this: http://cgi.ebay.com/ebaymotors...38634

thought the plenum looked a little suspicious (by cylinder 6 area, notice the similarity to teh STOCK plenum how it sticks out away from the plenum, but the REAL nismo one does not) also note the underside of the Nismo plenum doesn't have a freeze plug, unlike the one pictured on ebay.

see here for rbmotoring's side by side comparo: http://rbmotoring.com/gallery/album82

is this a rebadging scam, or just an unknowing seller, or am i just seeing things?

thoughts? and if you are bidding, beware!

[Eikon]

I can't speak on the intake itself... I have no idea... But I can tell you not to buy anything from that seller.

I had a pretty bad experience buying from him. I bought something from him Jan 4 of this year... didn't get it until the end of April. He kept blowing me off for weeks at a time... then I would get on his case and he would say something about the shipping taking a long time from Japan, and it came back to him because it was overweight..etc... Just a bunch of total BS. Finally I got EBAY on his case and filed claims, etc... he finally sent it to me. I didn't get to leave bad feedback because there's a 90 day time limit.. but I sure would have.

So my advice... stay away from Chokuginboy. He sells a lot of RB stuff on EbAY.. I know better now.

[Nameless EJ6]

That's a stock plenum. What a dip****.

[gawdzilla]

as i suspected.... hefty price to pay for a nismo logo. hope no one here is bidding for it...

[enginerd]

Damn, thank you guys for pointing this out. I have been waiting quietly to snipe this item. I didn't even think to look closer to verify whether this is a true Nismo item or not. But comparing that intake to the stock one from my motor, it is the exact damn thing. Thanks again for looking out for fellow NICO members.

I sent a message to each person who has bid on the plenum to let them know it's fake. I also sent eBay a notice so that they can possibly cancel the auction.
Modified by enginerd at 8:34 AM 6/14/2005

[Florida240sx]

What a *****.too bad I can't email that guy and tell him.Things like this ruin the community.

[gawdzilla]

haha funny.. at first i was also looking to snipe this item... but upon further review, definitely not.

could very well be an innocent mistake. judging by Eikon's post, probably not, but could be that the seller just doesnt know any better.

just noticed that the REAL Nismo plenum has plugs for extra injectors/nitrous too, cool!

[enginerd]

Yeah, I really want that intake plenum. I like the fact it has the extra plugs and the airflow is evened out. It doesn't make much more power over the stock plenum, but it makes a big difference in evening out the combustion chamber temps. Too bad it costs so much. I only found one place in Australia that wants $2k for it. I know I've seen it cheaper somewhere else, but can't find it anymore. Guess I'll have to use the Greddy intake.

[gawdzilla]

try calling rbmotoring about it... its listed on their website, just no price http://www.rbmotoring.com/cata...fc764

i'm also interested in it maybe in the next few months depending on how my motor runs... let me know what price they quote you.

[enginerd]

I e-mailed RB Motoring. Now we'll just wait to hear back. I did manage to find the other website that sells the intake plenum.

http://www.takakaira.co.jp/asp...gcjFe

The only downside is that this website is from Japan so I don't know how trustworthy it is or how long it will take to ship. Price listed is $1,432 but when the dust settles it will likely be around $1,600 shipped. That's still better than the $2k plus shipping price at http://www.uniqueautos.com.au/...o.htm

[enginerd]

Well, I sent a message to the seller and notified him the intake plenum was a fake. He seemed to not know it was a fake. Here's what his reply was.

Quote »okay thank you for the information.. I originally bought this part from japan yahoo and I was told it was a nismo on as well... Hmm I guess i got the raw end as well... Thank you[/quote]

[goofynick6]

Why spend $1600 on an intake plenum when it will maybe gain you 20hp? You can make like 600hp on the stock one, why bother?

[enginerd]

I think this link does the best job discussing the plenum.

http://www.skylinesaustralia.c...25803

For those who don't feel like reading through the link, here's the two most important posts.

The main claim to fame was that air distribution was normalised, preventing preferential flow to the rear cylinders. The main problem with this is leaning out of the rear cylinders, particularly when the AVERAGE a/f ratio is near the limit.

If you have an after market ECU, it is much cheaper to measure the individual exhaust runners (using an infrared thermometer gun) and trim the individual injectors whilst on the dyno. I richened up #6 cylinder by 5% and #5 cylinder by 3% which gave temperature differences within 10C front to rear. BTW - average temps were around 580C on the outside of the factory cast manifolds.

If you don't have a decent ECU, then spend your money on this first.

Hi guys, this plenum is not about power increases at steady state running, as on the dyno. It is about throttle response and even airflow across the cylinders.

What Gav has posted about evening out the A/F ratios by adding more fuel is totally sound. But there is more to it than that. Using Gav's numbers, he is putting 5% more fuel in #6, obviously to match the 5% more airflow that #6 gets from the inlet system. But that means cylinder #6 is producing 5% more power. Similarly 3% for #5.

So (simplistically) if Gav's engine makes 600 bhp then;#1 = 98.5 BHP #2 = 98.5 BHP#3 = 98.5 BHP#4 = 98.5 BHP#5 = 102 BHP#6 = 104 BHP

Now what do you think this does to the crankshaft, which gets a 104 bhp combustion hit from cylinder #6 and a 98.5 bhp combustion hit from #1? My opinion is that it would result in uneven running engine (like out of balance), premature wearing of the main bearings #5, #6 and #7, differential expansion rates (cylinder head and block) and premature block failure. When you get further up the power tree (eg; 1200 bhp) the problem gets worse. Obviously none of this shows up on the dyno.

So if you add this to the improved throttle response, which also doesn't show up on the dyno, then using one of these plenums maybe worthwhile. It really depends on your usage, eg; for a drag car I wouldn't bother, for a circuit race car it may well be worth the cost.

Hope that makes sense.

[intrexin]

With the last one with the stock rb26 plemum isn't there not as much air going into the last 2 cylinders, so wouldn't that improve that and he's addding fuel because they they are finnally getting the same amount of air as the rest

[sean8564]

it sold for 710 dollars

[enginerd]

With the last one with the stock rb26 plemum isn't there not as much air going into the last 2 cylinders, so wouldn't that improve that and he's addding fuel because they they are finnally getting the same amount of air as the rest

I think you got things backwards. The stock plenum gets more air in the last 2 cylinders, not less. That is why they leaner (and hotter) than the other chambers. Increasing fuel to those chambers help correct the A/F ratio which in turn helps decrease the temp. What Sydneykid is trying to explain is that since you increase the air and fuel going to the last two chambers, they will be making more power than the other chambers. This uneven power distribution will likely put added stress on the crank.

Remember, dyno numbers and graphs only show part of the overall performance of a car. You can't rely only on the numbers.

[BoostFab]

Why spend $1600 on an intake plenum when it will maybe gain you 20hp? You can make like 600hp on the stock one, why bother?

honestly there are many stupidity out there and they're really crazy into the "Nismo" & "JDM" fad....common sense can't really bought.

the bottle nect on the rb26 intake manifold is its small single throttle bodies, not the plenum itself.

[gawdzilla]

it sold for 710 dollars

i bet he'll really feel the gains from that plenum... that sticker is known to solve all the oem plenum problems and then some!

one expensive nismo sticker there

[Eikon]

i bet he'll really feel the gains from that plenum... that sticker is known to solve all the oem plenum problems and then some!

one expensive nismo sticker there

Yeah if he ever gets the item at all.

[s14 2510's]

I had that on my watch page. That was nutz. How could anybody pay soo mutch for a sticker. Who ever bought that must not know too mutch about rb's. What a joke. I want to post my stock plenum on there with a sticker on it if people are going to pay tat mutch for stock sh*t. I hope that nismo sticker makes him mad hp.