BNR stage 3 turbos
02-17-17, 01:09 PM
#101
Install BNR on my car last summer had it tune it make 310 hp at 1.04 bar. Not saying BNR is bad turbo i love em but my HP is so low.Can some one tell me why my power is so low?Here is the mod i have BNR tubo,550cc 1700cc injector rewire Supar fuel pump,greddy smic ,AEM water injector with 500 cc nozzle ,down pipe Pettit High flow cat, RB cat back,HKS twin power, run all 9 plug .
02-26-17, 07:30 PM
#106
Install BNR on my car last summer had it tune it make 310 hp at 1.04 bar. Not saying BNR is bad turbo i love em but my HP is so low.Can some one tell me why my power is so low?Here is the mod i have BNR tubo,550cc 1700cc injector rewire Supar fuel pump,greddy smic ,AEM water injector with 500 cc nozzle ,down pipe Pettit High flow cat, RB cat back,HKS twin power, run all 9 plug .
I have the same exact exhaust at the moment with similar other mods, no WI but a much larger intercooler, and just had a stock ported motor with new BNRs dynoed, and got only a little more rwhp.
I strongly suspect, but don't know, that the Pettit high flow cat is not actually very high flow. I'm replacing mine with an SMB.
02-26-17, 09:09 PM
#107
Install BNR on my car last summer had it tune it make 310 hp at 1.04 bar. Not saying BNR is bad turbo i love em but my HP is so low.Can some one tell me why my power is so low?Here is the mod i have BNR tubo,550cc 1700cc injector rewire Supar fuel pump,greddy smic ,AEM water injector with 500 cc nozzle ,down pipe Pettit High flow cat, RB cat back,HKS twin power, run all 9 plug .
I have the same exact exhaust at the moment with similar other mods, no WI but a much larger intercooler, and just had a stock ported motor with new BNRs dynoed, and got only a little more rwhp.
I strongly suspect, but don't know, that the Pettit high flow cat is not actually very high flow. I'm replacing mine with an SMB.
I strongly suspect, but don't know, that the Pettit high flow cat is not actually very high flow. I'm replacing mine with an SMB.
BNRs don't make significantly more power than regular twins from anything I've seen. They're capable of pushing more boost more reliably.
You run the stockers out to 20psi and they'll put up 400+ too, just not for long. The more boost you run, the better the BNRs look compared to stock.
02-26-17, 10:55 PM
#108
What dyno type? Lots of inflated numbers flying around the internet. Running a quiet and catalyzed exhaust will hold your peak numbers down.
BNRs don't make significantly more power than regular twins from anything I've seen. They're capable of pushing more boost more reliably.
You run the stockers out to 20psi and they'll put up 400+ too, just not for long. The more boost you run, the better the BNRs look compared to stock.
BNRs don't make significantly more power than regular twins from anything I've seen. They're capable of pushing more boost more reliably.
You run the stockers out to 20psi and they'll put up 400+ too, just not for long. The more boost you run, the better the BNRs look compared to stock.
02-27-17, 10:07 AM
#110
This particular car is set up for the road course so a time slip would mean nothing. I'll offer this: buy a set of BNR Stage 3s from me, I'll install them and retune the car, leaving all other things the same. If the car doesn't make more power at the same boost over the twins, the turbos are on me.
02-27-17, 02:34 PM
#111
I have the same exact exhaust at the moment with similar other mods, no WI but a much larger intercooler, and just had a stock ported motor with new BNRs dynoed, and got only a little more rwhp.
I strongly suspect, but don't know, that the Pettit high flow cat is not actually very high flow. I'm replacing mine with an SMB.
I strongly suspect, but don't know, that the Pettit high flow cat is not actually very high flow. I'm replacing mine with an SMB.
Last edited by MattGold; 02-27-17 at 02:40 PM.
02-27-17, 02:57 PM
#112
This particular car is set up for the road course so a time slip would mean nothing. I'll offer this: buy a set of BNR Stage 3s from me, I'll install them and retune the car, leaving all other things the same. If the car doesn't make more power at the same boost over the twins, the turbos are on me.
Wonder if the single tip is any better...
02-28-17, 02:31 AM
#115
I'm going to change back to Bonez cat my old one broke that is why i got Pittit cat and may be change the RB catback also.If i do that do i need to get a retune?Right now it tune @ 15 psi injector duty is about 76% on power fc at when i hit full boost .
02-28-17, 01:15 PM
#120
Eats, Sleeps, Dreams Rotary
This particular car is set up for the road course so a time slip would mean nothing. I'll offer this: buy a set of BNR Stage 3s from me, I'll install them and retune the car, leaving all other things the same. If the car doesn't make more power at the same boost over the twins, the turbos are on me.
02-28-17, 01:25 PM
#121
Eats, Sleeps, Dreams Rotary
Couple things id note on this thread
The smb cat, while is pretty, is still a cat and going to rob significant power on our boosted cars. I took my smb cat off and made 30 more rwhp instantly.
the rb CB is fine. i made 366 on the rb with stock twins at 15psi and ran 118 traps consistently and if i recall some 119 and 120s.
While IRP has made a ton of power my best guess is that the BNRS on average are only a slight improvement over stock. Although i will add a disclaimer that people (other than IRP) have spent a ton of time on the dyno and as a result have made more than slight improvements. But that is hard to replicate i have found. I am looking at hundreds of dyno sheets over the years versus like 5 that have done some amazing stuff. To me that's an anamoly and not the norm. If you want big power the best path is single and this is well documented
To narfle point, I 1000% agree. We need trap speeds. Thats not a knock on anyone. I been syaing that for all eternity. Id love to know what a 425-455 bnr powered fd runs for one. There have been a few over the past decade and i never seen a slip. Having said that, i think i made 413rwhp on my current setup which is bnr powered. I will be heading to strip as soon as i can. But i must say i havent been thrilled with this car (this is a different fd than i mentioned above). It also made 370 on lower boost but i think my traps were 114-116mph. I am not sure if thats due to my 18inch rims or if the power output is fraudulent. I dont know the answer. But i will report back what i run at the strip soon. Call it april. Once it warms up around here. Its almost a right of passage to me. I couldnt mod the hell out of these cars and take a dyno sheet as proof of anything. Thats just me. I want to know what it does on the road. So i will go.. I will get a few runs in and probably never return.
The smb cat, while is pretty, is still a cat and going to rob significant power on our boosted cars. I took my smb cat off and made 30 more rwhp instantly.
the rb CB is fine. i made 366 on the rb with stock twins at 15psi and ran 118 traps consistently and if i recall some 119 and 120s.
While IRP has made a ton of power my best guess is that the BNRS on average are only a slight improvement over stock. Although i will add a disclaimer that people (other than IRP) have spent a ton of time on the dyno and as a result have made more than slight improvements. But that is hard to replicate i have found. I am looking at hundreds of dyno sheets over the years versus like 5 that have done some amazing stuff. To me that's an anamoly and not the norm. If you want big power the best path is single and this is well documented
To narfle point, I 1000% agree. We need trap speeds. Thats not a knock on anyone. I been syaing that for all eternity. Id love to know what a 425-455 bnr powered fd runs for one. There have been a few over the past decade and i never seen a slip. Having said that, i think i made 413rwhp on my current setup which is bnr powered. I will be heading to strip as soon as i can. But i must say i havent been thrilled with this car (this is a different fd than i mentioned above). It also made 370 on lower boost but i think my traps were 114-116mph. I am not sure if thats due to my 18inch rims or if the power output is fraudulent. I dont know the answer. But i will report back what i run at the strip soon. Call it april. Once it warms up around here. Its almost a right of passage to me. I couldnt mod the hell out of these cars and take a dyno sheet as proof of anything. Thats just me. I want to know what it does on the road. So i will go.. I will get a few runs in and probably never return.
Last edited by matty; 02-28-17 at 01:30 PM.
02-28-17, 03:00 PM
#122
The thing about exhaust restriction is, it gets worse at the top of the rev range. For most of the curve area it's probably not a huge damper. But, at the top it'll cost you peak power.
If you want to run big boost on the stock frames, BNRs are proven. The original sets just won't hold together. And, I'm sure the other improvements differentiate the BNRs more and more, the more boost you run.
If you want to run big boost on the stock frames, BNRs are proven. The original sets just won't hold together. And, I'm sure the other improvements differentiate the BNRs more and more, the more boost you run.
Last edited by Narfle; 02-28-17 at 03:02 PM.
03-09-17, 07:05 PM
#125
Recovering Miataholic
Do the Stage 3 BNR turbos bolt right up to a stock '94 FD? Any grinding of metal required, or other issues? And will use of stock waste gate be a problem? Not looking for more HP, just a fresh turbo system that doesn't blow oil smoke out the exhaust (like our OEM turbos with 113K miles on them).