M's vs J's Intake & EK4 vs EK9 Exhaust questions


JDMjunkies.ch

JDMjunkies.ch

1st Swiss EK9 (Rx) owner!
Joined
Aug 29, 2007
Messages
407
Car(s)
EK9 Rx, S30 Z
Hi Guys i got some questions...

Due to my legalisation progress for my EK9 i will go ahead and do the exhaust emission and noise emission measurements allready with the new intake and exhaust system mounted so i don't have to do this twice.
The goal for this car is to be a track/show car for my company (JDMjunkies.ch) so everything has to be street legal for the hard swiss LAW and also it has to look nice and bring me some power benefits.. much huh? :D

anyway - here are my questions:

INTAKE
I've looked at two different intake systems
1x J's racing carbon fiber intake (the carbon is better due it leads heat badder to the inside than the plastic version)
2x M's / Gruppe M intake system. the gruppe M seems to use the normal intake piping but istead of the filterbox-system it uses a K&N cone filter with
a carbon shield sucking air from the front of the car. means it will possibly suck cooler air than the J's.
WHICH ONE WOULD BE YOUR CHOICE? WHY?

EXHAUST:
It's hard to find a power-bringing exhaust system that looks good (the jap. style :D) is high quality, latest technology and brings some power...

so first: i will take a TODA header with 60mm collector think that's an expensive but the best ever made header for an ek9 - choice...

second: i found the Tanabe Gfordan exhaust system that is limited to 93dB noise emission. it looks really nice, uses the latest technology and i know that tanabe really make high quality exhaust systems with great sound.

my problem: the GFordan is not produced for my EK9 :(
i found out that the US Spec version of this item (Tanabe Concept G) is sold in the US for all EK hatchback models but i think due to they never got the ek9 over there its only built for the ek4 models (Si). this exhaust uses an overall piping size of 60mm
now i was wondering if this one would fit on my ek9? due they have same piping-route under the car and do ek4 and ek9 have same connectors-size at the cat and headers? sure i can re-weld it if it won't fit but it would be much easier if i could install it directly ;)
WHAT DO YOU THINK ABOUT THAT COMBINATION / EXHAUST?
60mm seems to be ok i think.. what do you think?

thanks for your inputs guys! will help me a lot!
- Nils
 
I prefer to bought JASMA exhaust than the Tanabe Tanabe have a special noise and i don't like is kind of noise

And the shape between Ek4 and Ek9 catback are the same if you bought a catback for EK4 you must have a decat of 42 cm and jdm decat are shorter

secondly if you bought JDM catback like fujistubo in this case you can keep your jdm decat
 
hi, i won't use a decat pipe, because than i can't do the street legalisation thingy here. I'll use OEM cat for beginning and than replace it later. by a race cat (200 cell)
i like the sound of tanabe :D

2. JASMA is not a brand, jasma is a japanese organsation of exhaust manufacturers (hard to explain what it is in english *lol*).
so every japanese exhaust part with the JASMA logo on is street legal over there and meets japanese exhaust, noise and construction law and means it's tested by JASMA organisations and does meet the japanese law for being street legal. race-only exhaust parts do not have this stamp!
almost every big brand in japan does have those JASMA batches onto their street legal exhausts headers, mufflers etc! Its almost same as the VIA and JWL stamps on japanese wheels ;)
 
yes i know that Jasma is not a brand ^^

i have some friends in Switzerland the tell me that police are very strict
lower the sound will be better are the chance to have no problem


what is the length of your cat ?
 
@ Charlie:
yeah feels is cool and exclusive. but i think the big cone-filter will suck even more hot air from the engine-bay than the J's intake or the M's and also the big blue filter doesn't really look good for a black/white/red combined company demo car on car shows so i prefer the J's or Gruppe M or a replica by top fuel or something like that.

@ Kimken:
sorry i missunderstoud. my english is as bad as yours :D
yeah the tanabe does have the JASMA stamp on it. swiss law is very hard!!
 
lol i speak English like a Spanish cow^^

i just want to know how long is your catalytic ??

i hope you will understand^^
 
:D i have no idea. it's still the stock EK9 cat. how long is that?
the tanabe is a catback i think so it will replace the cat maybe? its a bit complicated..
here's the US spec, but i think i will ask tanabe japan for creating an EK9 special build for me. i have good contacts to them ;)
http://www.tanabe-usa.com/exhausts/conceptg.asp

the Jap. spec is 95 dB and called GFordan. think that's the best choice, even when a bit more expensive than a ready-built exhaust ;D
 
One quick question, where do you will buy the aftermarket parts? based on this I can make you some suggestions :)
 
@ Brent: yeah - but mugen intakes are normally bad and do not increase power much, and they cost a hell too and don't look that good like the J's. i think I'll go for the J's ;) only problem is the Exhaust now!

@rvm: i have an Jap parts importshop and a guy working for me over there in yokohama so i can buy any jap. parts directly from the factories over there :D

The US parts i usually buy directily in california i have good contacts over there due to i lived in LA for some years long time ago and know a lot of guys and shops over there ;)
 
JDMjunkies.ch said:
@ Brent: yeah - but mugen intakes are normally bad and do not increase power much, and they cost a hell too and don't look that good like the J's. i think I'll go for the J's ;) only problem is the Exhaust now!

@rvm: i have an Jap parts importshop and a guy working for me over there in yokohama so i can buy any jap. parts directly from the factories over there :D

The US parts i usually buy directily in california i have good contacts over there due to i lived in LA for some years long time ago and know a lot of guys and shops over there ;)
Click to expand...

Nice! well, I don't think the J's Racing intake will be legal, what intake do you plan to buy ? the one that has a big suction part outside the fron bumper or the normal intake ? :nerv:
 
hmm in switzerland this intake isnt legal :D but i'll mount it anyway. i use car so seldom its not a big problem i think. guys here drive turbo modded hondas without legalisation in daily use :D

because of the mugen item: the cars gonna represent my shop so i want to use honda-specific parts for this car but i want to use as much all-jap-car-manufacturers on this car as possible. becaus how can i show a customer what a great exhaust he can buy for his nissan when i have a mugen item mounted who's only avialeble for the hondas? you know what i mean? it's a bit confusing with my project i know. but there allready will be a lot honda-specific manufacturers part on th is car and i want to have more items from manufacturers that also produce items for other jap brands, like suspension etc.
i first thoght of an RS*R brand but it's hard to find any specs about noise about them so i thought it may be better tu buy the tanabe thing because a allready know some guys over here who have legalised the tanabe exhausts (different style but same noise level)...
i think tanabe is the best choice and i'll ask guys over in japan for a custom made tanabe system for my baby - will be expensive but best choice i think ;)
 
JDMjunkies.ch said:
hmm in switzerland this intake isnt legal :D but i'll mount it anyway. i use car so seldom its not a big problem i think. guys here drive turbo modded hondas without legalisation in daily use :D

because of the mugen item: the cars gonna represent my shop so i want to use honda-specific parts for this car but i want to use as much all-jap-car-manufacturers on this car as possible. becaus how can i show a customer what a great exhaust he can buy for his nissan when i have a mugen item mounted who's only avialeble for the hondas? you know what i mean? it's a bit confusing with my project i know. but there allready will be a lot honda-specific manufacturers part on th is car and i want to have more items from manufacturers that also produce items for other jap brands, like suspension etc.
i first thoght of an RS*R brand but it's hard to find any specs about noise about them so i thought it may be better tu buy the tanabe thing because a allready know some guys over here who have legalised the tanabe exhausts (different style but same noise level)...
i think tanabe is the best choice and i'll ask guys over in japan for a custom made tanabe system for my baby - will be expensive but best choice i think ;)
Click to expand...

Oh I see, :nice: you can try ARC also I think :)
 
hmm does someone have pictures and / or sizes of the complete ek9 or ek4 exhaust sytem?
is the ek9 cat longer than the ek4? also someone told me that that the ek4 has a male/female connecting system and the ek9 has a flat surface connecting system? can someone show me some pictures or give mi information?

i thought maybe i have to chance the connector and cut the ek4 tanabe system for fitting it to the ek9, but maybe i have to add some length or something. i have no idea. hope you can help me!

btw: I bought the J's intake now with some smaller goodies by spoon, mugen and Honda... you'll see in about two weeks or something ;)

thanks - Nils
 
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