BNR stage 3 Dyno. High boost. (might be new record)
Joined: Sep 2003
Posts: 3,067
Likes: 7
From: Home of the Rolex 24
I have heard of a few issues, but who do you believe? Looks like your set-up is done right. Probably not the pump, but a weak spot somewhere else. G
Joined: Sep 2003
Posts: 3,067
Likes: 7
From: Home of the Rolex 24
CONGRATS!!!! What are the specs on the engine?
I had made 421 at ~17 psi, so 450 at 19-20 psi is certainly believable. I believe someone else had 423 or something similar so I didn't hold the 'official' record, I just whored my car out all over the net
The main thing that held me back from running more boost was the limits of the supra tt fuel pump, and also more fuel injector.... I had 850/1300s.
Let us know what kind of trap speeds you're running if you ever get to the drag strip
P.S. Glad to see the IRP GB had a hand in this accomplishment
I had made 421 at ~17 psi, so 450 at 19-20 psi is certainly believable. I believe someone else had 423 or something similar so I didn't hold the 'official' record, I just whored my car out all over the net
The main thing that held me back from running more boost was the limits of the supra tt fuel pump, and also more fuel injector.... I had 850/1300s.
Let us know what kind of trap speeds you're running if you ever get to the drag strip
P.S. Glad to see the IRP GB had a hand in this accomplishment
The engine has a VERY large streetport on the intake side and I couldn't have gone any bigger without cutting into the water jacket. It's basically as large as you can go without going bridge. On the exhaust it's kind of something that me and my engine builder have been working on. I guess the best way to describe it is a mix between a ep2a and a ep4a. Simply put, the porting above the exhaust port resembles a ep2a with the porting below being ep4a. It spools the turbo faster without having to worry about the increased risk of boost creep. The only drawbacks to the port have been that the car needs to idle around 1,100-1,200 to keep the idle stable and to keep the car from randomly stalling. The other drawback is that the car will not idle without dieing until water temps are above 45c.
Other then the port work I'm running Mazda corner seals, Atkins cryo-treated side seals, and RA super-seals.
Ironically, if it weren't for the group buy that you helped sponsor I wouldn't have done it.
While I originally got the idea for coating my lower intake from a local tuner I must admit that I decided to coat the underside of my upper intake and intercooler end tanks from you. THANKS!!
Hey Ball joint nice numbers, btw can u tell what are ur injector duty cycle percentage? And if u rewire ur fuel pump? Also your motor race ported? Can you elaborate is it (small, large or very large etc). I was goona sell my non seq BNR stage 3 but after seeing ur power I am changing my mind.
I've "rewired" my fuel pump to make sure that the pump is getting a full 14v but I'm still using stock wiring. I'd have to dig through posts but there's a way to bypass the voltage regulator by simply jumping a wire under the fuse box under the hood to run 14v at all times. I would completely re-wire the pump but since the Aeromotive Stealth 340 draws such low amperage the stock wiring is capable of handling it. what's interesting is that the Denso Supra pump, which flows less, draws more amps and needs to be re-wired in order to get maximum flow and reliable operation.
I addressed my porting in a post above.
What's crazy about the BNR's is that there's still more potential to make power on my setup. My intercooler isn't cooling the air efficiently, I did this running very rich air fuel ratios of 10.5-10.7, and my intercooler piping going into the intercooler isn't efficiently plumbed (too many bends/turns). I once again have to give credit to Dudemaaanownsanrx7 and his pre-turbo water injection kit. I took a gamble on his research that pre-turbo water injection will increase the efficiency range of the turbos and in my book he's correct.
I hope that with all these problems worked out I can to get into the 470-480's.
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It's just an older design, that's all. What's most impressive about that pump is that it is an OEM pump meant for car that doesn't even put 300 to the wheels from the factory.
Has any information been posted online about this? I'd like to see his setup. I'm not saying I don't believe you, as I think this number is possible, but I'd still like to see some evidence.
To the other poster, yes, there are mesh screens behind the velocity stacks. They've already saved my turbos once.
To the other poster, yes, there are mesh screens behind the velocity stacks. They've already saved my turbos once.
Joined: Aug 2005
Posts: 246
Likes: 0
From: Birmingham, AL
Hey all.
Good job on the numbers. I started an experimental compressor wheel at the time of the group buy. I think 2 or 3 sets out of 15 sets had the original wheel in them. The new wheels are machined just like the 2860 but I chose a more efficient compressor wheel casting which allows for about 4 more lbs/min of air flow per wheel. The pressure ratio also changed. So maybe we are onto something here.
We have seen awesome gains from the mazdaspeed 3/6 with this newly manufactured compressor. It is one of my ultimate favorite compressor wheels of all time. 20-30 WHP gain just from the compressor change on 1 turbo.
Bryan@BNR
Good job on the numbers. I started an experimental compressor wheel at the time of the group buy. I think 2 or 3 sets out of 15 sets had the original wheel in them. The new wheels are machined just like the 2860 but I chose a more efficient compressor wheel casting which allows for about 4 more lbs/min of air flow per wheel. The pressure ratio also changed. So maybe we are onto something here
.We have seen awesome gains from the mazdaspeed 3/6 with this newly manufactured compressor. It is one of my ultimate favorite compressor wheels of all time. 20-30 WHP gain just from the compressor change on 1 turbo.
Bryan@BNR
