would there be any advantage to replacing the stock turbo with a hybrid? while leaving everything else stock. would the boost still stay at 6 psi. would there be lag? or would it work. im in california and they really are cracking down on modified cars. impounding and fineing. so i want to keep it smog legal and just put the bigger turbo in. no one would notice the turbo with all the stock intaken the way. i have most of the parts to build the hybrid but i want to know if its even goin to be worth it. if no one knows i guess ill just have to try it out and see what happens. dyno before and after.
Thanks

 

anyone have an idea?
thanks

 

well the exhaust, intake and other constrictive things cause the lower boost of the stock turbo so i'm sure it would do it to a hybrid however you gotta remember that the amount of boost on a stock turbo is differant the the same amount of boost on a hybrid because of the larger compressor. What you may want to do is just keep the stock tid and put a k&n filter in there as well as get rid of the exhaust and get a racing beat street legal exhaust that is still legal in cali but is not as restrictive as the stock setup.

 

im not worried about the boost being high. i want it to remain low for reliability. so you think the boost reading may be lower but probably the same volume of air? does what i just said make sense?

 

yeah, california plain sucks for smog. I fking hate it.

 

I went to cali once when I was younger and couldn't stand it! They are so liberal it seems they went conservative, lol. Nothing is allowed! When I think liberal I think you can do whatever, party time etc... but that is just not the case in cali. Anyways I dont' understand why you would want a bnr turbo if you are planning on running stock boost. That just doesn't make much sense to me. wether you are running 5 or 15lbs of boost your reliabitlity is not going to change that much with such a small turbo. Now if you where to go to something like a t78-88 or gt42-45 etc... then yes you need to worry about things breaking.

 

I'm speculating here, but it seems like it would just be laggier with not enough topend improvement to be worth the hassle.

 

8 psi (think cfm) on your stock turbo DOES NOT equal 8 psi (remember, think cfm) on a larger turbo

i dont see anything wrong at all with him wanting a hybrid turbo for a slightly better kick. But if rotoraries apex seals are ANYTHING like piston rings, psi does not kill them, actual cylider pressure and hotspots kill them. you are less likely to have said hotspots at 6-8psi on your bnr vs. 6-8psi churning through a hot little stock turbo and will make marginally more power with the bnr.

um, correct me if i am wrong, but 15psi on a stock s4 turbo is just asking for trouble. if you like pumping ridiculously hot sweaty air in a dense package i guess it would serve that purpose.

oh crap, you want to keep stock piping and upgrade the turbo?!?! stock exhaust on our stock turbo is too damn restrictive, dont you dare put a larger turbo in such a restrictive area.

 

everything you just said is what I've been saying lol.

 

MY car used to have a front mount, open exhaust all the way back, running 11-12 psi with the stock turbo and was planning to use the upgrade. but now iv put it all back to stock because im not going to get my car impounded and pay thousands of dollars in fines (just not worth the risk here in central california). so im going to keep it as street legal as possible. so you are saying there would be no realistic improvement in swapping turbos unless i opened up the exhaust (maybe a high flow cat). Keep in mind i have to keep the top mount.

 

There's no point in going with a larger turbo, unless you plan to upgrade to a straight through exhaust, TID, etc... Although the BNR would boost more efficiently, it would be severely choked by any stock exhaust components...

 

you are making it sound like it wouldnt work
it would work, and at the end of the day, you still get gains....

 

600-900 dollars worth of gains? Hell no, thats why I wouldn't even bother. Like I said why not just get a racingbeat exhaust that is legal in california yet opens up the exhaust enough to let the thing flow as well as get a simple k&n should help out as well. Here is the problem though. You are saying your doing this for californian law but you are also saying you want it like this to keep your car heathy. witch on is it man???? Also whats not healthy about letting a rotary breath?

 

a hybrid that fits in the stock compressor would be in california law and would NEVER get him pulled over.
The racingbeat exhaust could....

That hybrid could be found for $300 ish. For that price, you could get a catback too, but I doubt you will be seeing as much gains as a hybrid....

 

i guess its not a terrible option for a smog **** state, but id just hide a some spray somewhere and call it a day.

 

Oh yeah, really good advice...

 

? What was so bad about it? He wants bang for the buck and to avoid the smog ****'s, how would my direction be so bad?

 

the beauty of a racing beat is that it's not loud like the other exhuast systems and the other thing that is nice is it doesn't have big fart can style mufflers that tip cops off So if you want performance and want to stay legal get a bnr, racingbeat exhaust and drop in k&n filter.

 

ok i say you get a 3in downpipe only... then an electronic cut out, keep the cats, and stock ex.... so you get the performance/ sound you want when you want and will still pass emissions...
now put your front mount back on and spray paint it all black....all of hit so it looks nice and stock...
paint the bov, everything black... gut the stock airbox and put in a k and n or something...

build it like making a sleeper, sucks to live in california.... texas is the ****!

 

This guy seems like he really wants to keep his car on the "legal" side..and with this in mind, I would think he should stray away from Nitrous, as this is the easiest mod (besides exhaust, obviously) to be.."heard", really. Also, it's pretty hard to hide big stainless steel lines from an inspector. A bigger turbo, on a factory-turbo car, is not so suspicious, hehe.

 

for the price of that catback, i think he could buy the turbo for that money, assuming both are new... and then get one of those adjustable wastegate rods... how cool would it be, pop the hood, looks slow, but run alot faster!!

 

oh it can be well hidden. they not only have black stainless lines now, but any wireloom can easily be mistaken for stock components. but im not here to debate hiding nitrous, I just felt it would a cost effective, result effective way to do things in a smog **** state. best of luck to all you californians i dont know who you live

 

okay guys seems like some of you got the idea. so it seems that it would be beneficial but not by much. thats all i wanted to know. i already have the hybrid. it justs needs a compressor wheel and get balanced.
Thanks

 

Do they do a visual check only if you fail a sniffer test. I was running a RB turbo back kit with a 3 inch bonz cat and passed with flying colors with nothing but a SAFC in seattle. I can swap out the cat in about 45 mins going without even trying.
Just a thought

 

Dude, come to Montana, join the national guard, move back to Cali and work at our detachment and you are home free for emissions. I am down here in Perris and I have my FC pretty much tweaked. The CHP and PD cant do a damn thing about my upgrades because I am a Montana resident. been pulled over three times and everytime they ask ME about montana emissions policy and then send me on my way. Leave laughing every time.

Do the hybrid and the catback or hybrid/downpipe combo. I got the racing beat 3inch turbo back and the sound is very low key until under boost. It doesn't look ricey at all.