BNR stage 1s poor performance...whats wrong?
 

I just recently had a shop install BNR stage 1 turbos on my Rx7. My mods now include turbos, walbro fuel pump, m2 cold air intake, hks dp, blitz cb, RE Anemia Ecu. My car runs great on the first turbo (which is basically stock rebuild from bnr) but when the secondary turbo comes on the car looses boost and in first gear it sputters when the second turbo comes on , you can feel a huge loss in power and It is way slower than when I dropped my car off to get the Bnr Turbos. The shop said that they would re-look over their work to make sure no vaccum lines or anything is done incorrectly, but that there is only like 4 vaccum lines that they would have touched when taking out and puting in the new turbos.

What Could my problem be. Oh yeah and my boost is only like holding at 7 lbs max. I dont want to be out any more money, what do I need to do to make my car run right?

Thanks

Oh yeah and the car ran almost the same with the stock ecu and stock intake, it only runs a little better with the m2 intake and the re anemia ecu.

Sounds like you have a turbo control problem. There are some good sites with troubleshooting info that you should take a look at. I doubt there is anything wrong with the turbos themselves.

-Max

The same thing that's wrong with the 400rwhp claim on stock twins...

Do you mean that i need a boost controller?

???

bump

do you have silicon hoses?

something must be wrong with the vacuum lines.
Make sure the vacuum gets to where it needs to and the pressure too.
don't blame it on the turbo. Because the turbo is very simple by itself, but the controls are not. The controls are the vacuum and pressure lines.
Check the troubleshooting above. You may need to work on your car a little bit to understand.

Reza

bump

What is the boost pattern? Eventhough there are only 4 vacum lines they touched they could have messed those up if they did not have a vacum diagram. Those are the 4 mains ones: turbo pre-control, turbo control, wastegate control,...

Just curious how much you paid for the install as I'm about to get the stage 3s

Are they still sequential in operation? or non-sequential?

IF THE 1ST TURBO DOESN'T MAKE 8 PSI, THE SECOND ONE WON'T COME ONLINE.
I asked you what psi the turbo was making in your last post about the BNR's. If the 1st turbo, which you say is only making 7 psi, it won't transition. You must have a leak or something for it to only 7 psi or your venting boost some other way. Check all the hose connections to make sure they are tight. Then take off the stock accordian hose that go to and from the IC and sqeeze them, looking for splits that would vent boost under pressure.

Tim

why would you want to run the stage 1 in parallel when the secondary flows more than the primary?

its most likely a boost leak. seq or non seq.. it shouldnt sputter or get slower the higher in rpm you go.

i would go over the vacuum lines.. all of them. especially the one's that are hidden.

i doubt its the actuators.

i doubt its the ecu or the turbo's themselves.

all of my boost problems were due to vacumm hoses or intercooler couplers popping off. once the blow off valve hose was ripped and that was leaking boost too. the hose that goes to the CRV valve popped off once also.

i had all your symptoms.. with my old turbos.. and with my new 99's... but they're all fixed.. zipped tied and secured.

:confused: what do you mean by this statement?

can someone tell me if the guy has silicon hoses?

I dropped the car back off at autotech motorsports and no , I dont have silcon hoses...

Did they put the orifices back in the wastegate line?

LOL! Small world, 777rx777. I had Autotech do a silicon job on my stock turbos recently and right after leaving the shop, I performed a test drive to make sure. My boost, which had been 10-8-7, all of a sudden was now 6-5-6. Turns out one of the intercooler couplings was loose. The mechanic put in a silicon joint in place of the stock rubber coupling and my boost was back to normal. Sad thing is... they discovered that my primary turbo is leaking.

did they solve the boost problem? I just got stage 3's professionally installed and no boost

you guys need to start learning how to do things yourselves. There are not many shops at all in the US that know what they are doing with the seq system.

777 - it sounds like maybe they left the pills out of the lines.

Like everyone else said, there really isnt anything that the turbo itself would have wrong to cause those problems. Turbos are dumb, if exhaust goes thru them they turn. If they turn they make boost. More than likely the control system is just venting all your boost out.

gohorns - I'm assuming you have them set up non seq. What all did the shop do? Did they pull out all the seq stuff? Did you go over all your IC piping to make sure its all very secure and tight with no rips?

STEPHEN

???

Like everyone else, I fail to see what your talking about

Please explain it

STEPHEN

If I had a lift and air tools I would but this guys knows rotaries and was the next best thing...Mine are seq and everything that was taken off was labeled and put back in the same place. New coolants, oil lines and gaskets were installed. We are checking with BNR and pretty sure the turbos are bad.


777- since you get boost your turbos must be good and has be either the wastgate not closing all the way or pre-spool

I doubt it man, he inspects the hell out of those things and they are tight as a bull frogs ass when they leave the shop. I cant imagine it would have total failure the minute you crank it up. For that to happen and they NEVER made boost that means the shaft or something would have to been snaped with no boost. I dont even see how that is possible.

What computer are you running???

STEPHEN