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My friend told me it's because of the rear diff backlash, does it make sens? If I go for a Quaife, will I ever get a backlash due to the gear vs disc ? and if I upgrade my stock FRONT diff for a nismo GT 1.5 way, will i get the backlash ? would I be better buying a front quaife too ? thanks!!

Just thought that I could share the discussion I had with one of the turbosmart sale rep. The part about the valve is, IMO, the most interesting thing to debate/discuss. Because if it's true, it means that everyone pushing more than 25psi should most likely benefit from a VTA/block off plate and run a bigger BOV somewhere on your piping. I'm no mechanic, IRL, I'm an accountant and a detailer, so sorry if I bother some ppl with my numerous questions but considering that few have bite the bullet on the EFR turbo, I guess I'm just trying to see if I can't make this combo even better.. After reading this, I'm thinking I should either buy the dual port and see how it goes.. or follow my mechanic's advice and go oem valve + weld a Raceport somewhere on the piping.

I believe I'm the only one looking for this, but for future reference, I don't think most knew that turbosmart make bolt-on BOV for the EFR.. they make it plumb back and 50/50 dual port. They say better response for both of them vs oem. http://www.turbosmartdirect.com/Product-Categories/Kompact-Series/BOV-Kompact-Shortie-Dual-Port.html http://www.turbosmartdirect.com/Product-Categories/Kompact-Series/BOV-Kompact-Shortie-Plumb-Back.html

I'm not, I'm simply stating the only one 83/74 -rb26 I know of and his exhaust combinaison. Just posting another option/point of view, we are there to discuss

Gotta love forum's influence ! But I have to say that Geoff when he managed to make 700whp with his efr, he had a 3.5 inch with cat. So I'm thinking 3.5 without cat shouldn't that much restrictive.. I mean.. i dont think we can really make 750whp with this turbo on a rb26.

I was actually thinking about doing a 4 inch dowpipe and using a 3.5 inch cat-back. At the dyno, I could remove my 3.5 inch cat-back and see how much i gain. this way I would need if it's worth the price of custom.

Yeah, I gotta admit that lol. Now, the challenge is to find a ''quiet'' 3.5 OR 4 inch exhaust. #challengeaccepted

Agree, but its a lot easier to find 3 inch *quality* muffler/resonator than in 3.5 inch or 4 inch ( most are just ',race spec'' and barely do sh*t lol). Lets be honest, people who go 4 inch usually don't care too much about sound isn't ?

Just heard my friend 4 inch exhaust and it wasn't that bad.. by reading most people opinion on this website, 4 inch is way too loud, but to my surprise, it isn't THAT bad..

re-routing in the exhaust. it would be way too lound if i go external, I'm afraid.

I have 3 inch right now. However, I'm thinking I *might* be better with a 3.5 inch and would the 4 inch be over-kill ?

So after looking through threads, some say it will raise the engine. Some say it won't. I already have a engine damper, I'm wondering if I should go nismo or oem. The price difference is not a factor, there's a 40$ difference. I'm leaning toward the Factory because i don't wish to have clearance problem, but I thought it would be fair to take 5 minutes and make sure I make the right move Thanks!

you cant receive any new pm... please send me one when you clear your box.

I believe I will try with my blitz as a dual bov first, and then block it off and feel the difference. http://www.evoxforums.com/forums/showpost.php?p=1330353&postcount=9

I will buy your Cspec if you wish to keep your quad !

yahoo auction ?

I admit, I like the loud surge sound ( not the high pitch hks makes). Some will go with 3.5' or 4 inch exhaust with one muffler. I don't like it. I have a 3 inch with a varex and 2 muffler to keep it as quiet as possible. I prefer bov sound over excessive-loud exhaust note. To each his own right ? With that said, if the difference is minime, I'm willing to sacrifice 15whp and 100rpm spool-up to hear my bov. However, if the difference is going to be 35whp and 400rpm, I will keep the internal EFR. No need to flames me.

So I'm still looking at the external BOV -thing. On page 94, Geoff said the difference shouldn't be noticeable, but I was looking for second opinion on different forums....and found out that a few guys would keep the OEM internal BOV from the EFR, but would keep their external BOV also. I was thinking about buying a GREDDY TYPE-R.. if I see the external bov greatly affect the boost between gear, I could install the recirculate adaptor or block off both adapter and use the EFR bov. What do you think about this option ? #2) If I keep the internal EFR BOV, do I need to delete the oem plastic tubing to have a ''cleaner more direct'' path for the single turbo ?

great stuff, I'm buying the front one for sure. interesting about the rear Im in the usa, so they are cheaper than what you guys pay

hey guys, any update/report/review on your install ? I believe a few guys were in the process of fitting them !

well... i grew up really liking that pssh sound ( not a fan of the hks high pitch note, but prefer a lower pitch note like these) yeah yeah, I'M well aware I'm going to spend 250$ for some sound, but oh well,that's my car right ?

I was actually looking at buying a raceport for my EFR turbo setup. these thing look great and sound similar to my blitz bov which i like. But i dont really see the need for the electronic controller on our setup.

LOL ^^ this thread is funny

Piggaz, you do many launch with it ? I was told to go OS giken if I would be launching the car often.

thank you! never thought coppermix made a '' competition'' version. I thought they were sh*t for drag purpose, only good for circuit or daily. seems like this one can take good abuse and I saw your running the same one for 5 yrs now. good enough for me Anyone tried or heard about the spec clutch? http://www.garagewhifbitz.co.uk/spec-clutch-1246.html