boostmotorsport

I just blew yet another stock turbo I dont get it I only run 10-11 lbs boost. Last one started smoking, and this one wooshes now really loud and my 7 is really lacking on power. I have one last back up turbo I can port then use.
So the one I just blew has a very efficient WG see the sticky thread up top for details. Should I pay the many hundreds for a rebuild and upgrade, or save 1000$ish for an upgraded turbo. I already have a healthy fuel set up so I think I could get away with

HKS manifold 200$ish
TO4- 700$ish
WG-300$ish
custom downpipe-75$
custom oil lines-75$
Total-1350$

I dont have the $ now, but what would you save for?

DaleClark

iTrader: (55)

If you're getting a whooshing noise, that's a boost leak, not a bad turbo. Check all your intercooler piping.

Dale

boostmotorsport

Its not a boost leak as if it were Id also have a vacuum leak, which I dont. I too thought itd be a leak but yesterday the noise came on at 3 lbs boost now it comes on at about -5psi untill 10lbs boost, but idles fine with 15 lbs vacuum. Its not the typical wooshy loss of air sound, but similar. Also you can hear it plain as day screaming under boost right from where the turbo sits. Has anyone ever had a turbo die without buring oil?

boostmotorsport

Aqlso I have a FMIC that I made all the piping for so I know its not that, but thanx for your input.
So basically its 650$ for a good rebuild and 60-1 Comp. side or 1300$ for TO4. If you were on a strict budget what would you do?

Crazy4Rotary

If your short on money, go with the $650, that is the hybrid rebuild right? or just plain stock rebuild? With the other root your not going ot see the full potential without a stand alone i.e. Haltech. Me, I'de get it rebuilt then make it a hybrid by bnr supercars, ask if they have any kind of warranty so this doesn't happen to you again where you have to pay.

I'm a n00bie but the upgraded turbo will probably leave you bankrupt. Standalone, Turbo, Intercooler, Tuning, Bov, Big headache.

I really don't understand your question a lot but I gave it a shot.

chris-reedtn

Huh? Not going to see full potential without sandalone? What? This is not always true, many people use different turbos other than stock and still use stock ecu, No not a big turbo, but bigger than stock, a certain persons car that i rode in had stock ecu and still does with a japspec motor and 60-1 now, but a ported motor then, and just let me say "DAMN" that thing is really fast and would easily blow my car off the street, And now that he has modded to e-manage, bigger frontmount, and numerous other goodies, this thing really should fly, and the sick thing is thats all on stock ecu.

-Chris

edomund

jspec bro

BLUE TII

iTrader: (9)

Is it possible that your front mount has so much volume that the litttle stock turbo compressor is over revving when you spool since it has no compressor back pressure until you fill all that volume?

I know sequential twin turbos use a system to limit compressor backpressure that spools the 2ndary turbo very quickly and they do have to worry about rpm overshoot.

boostmotorsport

The IC is only a starion unit with 2.25" piping. Does anyone know exactly how much a rebuild and 60-1 compressor side is from BNR? Also do they actually rebuild MY turbo or is mine just a core?

edomund

I was quoted around 650

jreynish

iTrader: (2)

you could do just about as good a to4 for about $800

You can get a T04 compressor housing and compressor wheel and exhaust wheel. no what you want to do is get the stock exhaust turbo manifold machined to fit your t04 exhaust turbine. now you can combine the two to make it a T04 basically except you turbo will spool alot quicker and you can keep your stock wastegate (YOU will need a GENEROUS wastegate port). that way you are laughing cause essencially you have a t04 for about 800 bones. i know a guy arround here that can do it for 800 canadian dollars! installed.

NZConvertible

That's not necessarily true. It's quite possible to have a loose fitting (or similar) that leaks under boost but is sucked closed under vacuum. Double-check everything from the turbo to the manifold. That'd be 15inHg vacuum, not 15psi. That's impossible...

BTW, it shouldn't cost many hundreds to get a turbo rebuilt. Remove and disassemble the turbo yourself, have someone rebuild and balance the core, then you do the reassembly (carefully) and reinstall. It won't look as flash, but you'll save yourself a few bucks. And yes, I'm speaking from experience.

banzaitoyota

huh-oh: Looks like trouble for the New Hampshire crew, especially after busting on Mazdaspeed7:

FC3S driver
Exhaust Leak

Status: Online!
Registered: Nov 2002
Location: Olympia, WA
Posts: 3
ATTN: boostmotorsport
to whom it may concern.
My name is Justin kincy, Back in june I sent you $155 for some CF door pannels. I do not have them yet. I know longer want them, I just want my money back. you have dissapointed me on how you do business, all i asked for is that you keep in contact with me and you couldn't even do that. I have tryed to call your shop at this # 603-749-7199 and it says it's beens disconnected, so please contact me at 360-943-4841 so we can clean this mess up.

thnaks, Justin

DaleClark

iTrader: (55)

*sigh* This is part of the reason I tell people that a front mount is harder than it looks. I can almost guarantee you that you have a boost leak. It's very easy to have air escape from a loose coupling under boost, but it seals shut at vacuum.

The easiest way to find boost leaks is to pressurize the intake tract. Remove the air filter and cap off the turbo. Dial an air compressor down to around 15psi output, and hook it up to a vacuum line and pressurize the system. You can usually hear and feel the air escaping from wherever the leak is.

Dale

presetlimits

wrong answer, bro

vmb

why so much hate between boost,mazdaspeed7 and banzai ?

banzaitoyota

No hate Adam and I understand each other , Boost was busting on ADAM and Justin pretty hard. Just trying to get the guys attention so someone gets their money back!

NZConvertible

If you have nothing to contribute to the discussion on boost's turbo problem, don't post here! If you want to get his attention, send him a PM or post in an appropriate forum. Those of us that prefer to read and contribute to threads of a technical nature aren't the slightest bit interested in all this crap. Please take it elsewhere.

FEARED7

hey.
A vacume leak has nothing to do with a boost leak. Like Dale says, check all of your connections for intercooler piping from your turbo to your throttle body adapter. If you have a bypass valve/BOV, check it for leaks. If you are still having boost problems, then check your wastegate actuator.

Let me know if you have any questions or comments...
Bryan
www.bnrsupercars.com
bnrsupercars@aol.com

boostmotorsport

BUstin on Mazdaspeed? How so?

Saku

I read this and it caught my eye. Within 1-2 months I would be very interested in doing this. My TII is in storage for the winter and I think I need a turbo rebuild anyways. If you could hook me up with this guy who can do this, I would appreciate it. Or even just PM me back with more info. Thanks alot.