Consumer Warning: Do Not Buy The Isis Exhaust Manifold For Sr20det

[Twin_Cam_Turbo]

I got a GT28 kit from enjukuracing.com, which including the ISIS exhaust manifold, and other bits. Although the welds on the manifold seem to be of good quality, when I went to test fit it on the car, the holes for the studs were out by as much as 5+mm over stock. I had to go back and re-drill larger holes just to ram the damn thing on. The studs they sent for attaching the turbo to the manifold were just as bad. All 4 were different lengths (crazy different lenghts), and two of them had damaged threads. Also the turbo had one hole that was drilled and tapped at an angle, which required re-tapping to get moderatly straight.

All in all I am dissapointed with enjukuracings product, and warn others you get what you pay for in this case. I will not be using anything ISIS ever again.

-James

[sr20s14zenki]

This is what i told you guys, these products SUCK, and half the time, there is issues like yours where it doesnt even fit right. You get what you pay for. Also, its hit and miss because ive had products from ebay and the like that im actually quite happy with, like intercooler kits, and downpipes/testpipes.


I have my eyes on a Tomei Expreme manifold right now...expensive as fuck, but worth it, you get to keep that raw sound that the sr20 has, because of the fact they keep the factory cylinder pairing. Pretty much no other manifold pairs the cylinders. I hear of people saying this manifold fully spools a 2871 by 3500 rpm, or less, which is just rediculous. The thing about high end brands, is there is R&D behind them, not just generically chucked together.


If that is how they build their manifolds, that scares me about how the longevity of that turbo is going to be. I installed an ebay gt2860 for a friend once, and it lasted him 2 weeks longer than i told him, a month......





sorry bout your luck man, hopefully the glue they used holds it together

[2Valve0]

If you buy something that major for your car...dont cheap and and get something decent

[dj_rice]

Does Enjuku know about the crap ISIS is provided?

[cjay^]

Originally posted by sr20s14zenki
I have my eyes on a Tomei Expreme manifold right now...expensive as fuck, but worth it, you get to keep that raw sound that the sr20 has, because of the fact they keep the factory cylinder pairing. Pretty much no other manifold pairs the cylinders. I hear of people saying this manifold fully spools a 2871 by 3500 rpm, or less, which is just rediculous. The thing about high end brands, is there is R&D behind them, not just generically chucked together.

http://www.frsport.com/Ichiba-NS-120...I_p_12705.html

What about that? it maintains the factory cylinder pairing like the expreme for a fraction of the cost. The only thing is I don't see the divider that the expreme has to prevent interference between cylinders.

[sr20s14zenki]

My friend, that is what the divider is there for. If you look at your stock manifold, only two cylinders can fire into one side, and only two can fire into the other. Its done that way to take advantage of the individual pulses of your engine rather than firing them all into one. This helps spool alot apparently. Tomei actually has theirs seperated at the collector, to keep any from interfering with the others. The Tomei manifold was designed to try and merge equal length tubing design, with trying to retain alot of the good attributes of the stock manifold. From what i understand, alot of guys out there actually port and polish their stock manifolds and it works great. Tomei did ALOT of R&D on this before actually letting this manifold out.

I was reading that in comparison to ssac manifolds, and those ichibas, and all the others that use a different design and no divider, guys are seeing 10 psi from a gt28rs (they didnt specify) at 2700 rpm, vs 3300 with a ssac generic design.

http://www.tomei-p.co.jp/_2003web-ca...nifold_en.html


check it out, read the pdf. Its intersting stuff

http://www.tomei-p.co.jp/inf/pdf/82_ae.pdf

[Scope951]

This is something you need to make Enjuku aware of, Constantly on Nico there are threads made where enjuku management has backed ISIS products ten fold.

make a post on nico club explaining the situation with pictures.

You are sure to get Enjuku to respond quickly and have your issue solved.

[Twin_Cam_Turbo]

I DIDNT buy anything else ISIS thank god, got the Garrett turbo and most other stuff OEM! Managed to get the manifold to work, but still fukcing annoying. And I have been composing a email to Enjuku over the past 24 hours, but I cant decide how I want to make it sound.

[Twin_Cam_Turbo]

Heres the email I sent:

Dear Enjukuracing,

I recently ordered a GT2871R turbo kit from you, and as I was installing it this weekend, I was appaled by the qualty of some parts of the kit. I ordered from your website after hearing good reviews from friends who had also used you for parts, however, in my case, your service has been fine, but the product was substandard.

As I was installing the kit, I tryed to test fit the exhaust manifold (ISIS), and found that it did not fit at all. The holes for the studs were as much as 5mm out of position, which was very frustrating. After some re-drilling, and widening of the holes, finally managed to make it fit, although not perfectly.

The next problem came when I went to connect the manifold to the turbo. The studs that were included were of 4 random lengths, with two having damaged threads. I was forced to go buy some 8mmx1.25mmx25mm bolts from Home Depot to replace the studs. This worked fine, until I came across one of the threaded hole on the turbo. The hole and thread had been cut at a slight angle, and this would not allow the two parts to mate properly. Here I was forced to re-cut some threads to try and straighten the hole.

Further more, when installing this kit, the size and design of the manifold require some relocation of other parts in the engine bay.

It was stated on your website that this kit was bolt-on for S13 SR20DETs, but as you can see, this kit was plainly not even close. I think you need to reconsider selling ISIS product, based on what I have seen, it is very low quality, and does not fit well at all. Further more, if you do consider to sell this kit as is, you may want to state that it is not a perfect bolt on kit!

Thank you for your time, and I hope some of these issues can be resolved for future buyers.

James Callaghan

[dj_rice]

I hope you took pictures of everything just to further cement your claims so ISIS and Enjuku can't deny it

[Twin_Cam_Turbo]

No pics, im not asking them to help me out, I just want them to be aware that some of the things they are selling have issues.

[Twin_Cam_Turbo]

They offered me $100 store credit for my troubles, they said they are aware a batch of manifolds were drilled inccorectly.

[Nissan_Fanboy]

Originally posted by Twin_Cam_Turbo
Heres the email I sent:

Dear Enjukuracing,
...

Damn, James went professional.
Well what can you get with a 100 credit?
Maybe an oil cap?
I still say that its a joke, and that they should have done something major about it.
Hopefully you can fix your boosting problem and stuff.
NEED MOAR TIRES NOW!

[Twin_Cam_Turbo]

I got a Z32 MAF and some STi injectors, but im horrible with wiring and dont know how to adapt my plugs for the injectors.

[sr20s14zenki]

Haha that's easy. You'll need a tune as well or some sort of fuel management.

[INeedBoost]

Do you guys know if the Ichiba manifold is any good? From what I've been told they are Tomei copies...

[Twin_Cam_Turbo]

Originally posted by sr20s14zenki
Haha that's easy. You'll need a tune as well or some sort of fuel management.

Have any online links/help for MAF and injector clip?

[sr20s14zenki]

Well google z32 maf s13, for that. As for the clips, there are two ways. You could call mine back yard, but it works. i shaved the guides off my injectors, effectively making them blanks, and with a little bend up with the terminals, voila she works.

here is the link to z32 maf install

http://zilvia.net/f/archive-faqs/975...0det-pics.html


What are you using for management, i hope you arent expecting to take the fuel out of the map with your safc......


Ineedboost: like i explained to cjay^, YES its a tomei clone, in appearance, and thats where the similarities stop. It does NOT retain the divider in the turbo flange to seperate the cylinders like the factory manifold does. The Tomei is expensive for a reason, its awesome in laymans terms.

[Twin_Cam_Turbo]

Looks like my motor blew this morning

[gretz]

oh man...