BNR 400+ HP Twins from RX-7 Store?
Hey, where did my $$$ go?
Joined: Feb 2001
Posts: 4,413
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From: Bimingham, AL
Originally posted by fdracer
well you never mentioned this was a dynojet. i just assumed this was on the old dyno, since you've got similar numbers from before, which you said equated to 15% less on a dynojet.
well you never mentioned this was a dynojet. i just assumed this was on the old dyno, since you've got similar numbers from before, which you said equated to 15% less on a dynojet.
STEPHEN
Last edited by SPOautos; Jan 15, 2003 at 06:08 PM.
Joined: Oct 2001
Posts: 4,772
Likes: 2
From: My 350Z Roadster kicks my RX7's butt
Originally posted by SPOautos
FOR ALL THAT ARE INTERESTED THE CHART ARE ON THIS THREAD.......
https://www.rx7club.com/forum/showth...3&pagenumber=2
If someone wants to post it over onto this one be my guest. I'm not sure how to make it show up as a picture.
Thanks,
STEPHEN
FOR ALL THAT ARE INTERESTED THE CHART ARE ON THIS THREAD.......
https://www.rx7club.com/forum/showth...3&pagenumber=2
If someone wants to post it over onto this one be my guest. I'm not sure how to make it show up as a picture.
Thanks,
STEPHEN
WTB** Very Low Miles 94-95
Joined: Jul 2001
Posts: 3,298
Likes: 0
From: Tejas
hey bill...that chart belongs to greg...its the same one i posted a while back in comparison to the rx6 on max coopers car.
he has very little transition drop...a smoothly running machine....I am positive he is seq though...ive seen the car with my own eyes.
he has very little transition drop...a smoothly running machine....I am positive he is seq though...ive seen the car with my own eyes.
Joined: Mar 2001
Posts: 30,807
Likes: 648
From: FL-->NJ/NYC again!
Originally posted by kwikrx7
Way to shut up the BS people, Stephen
412 rwhp is awesome on twins! Let's keep the dyno numbers coming!
Way to shut up the BS people, Stephen
412 rwhp is awesome on twins! Let's keep the dyno numbers coming!
My motor/turbos have 360 miles on them and counting....
NorCal 7's Co-founder
Joined: Aug 2002
Posts: 4,130
Likes: 5
From: Rocklin, CA
Very nice to see the sheets, thanx Stephen! Also good to see the proof for my own eyes. I was catching all kinds of flack from the local guys about these twins. I've just printed out the chart and will be heading to the shop in town tomorrow afternoon. Congrats bro. Laterz.
Zach
Zach
Senior Member
Joined: Jun 2002
Posts: 725
Likes: 0
From: Plano, TX
I too was totally blown away by the numbers that the bnr turbo setup is producing. But I walked into Rotary Performance yesterday to get some questions answered about the rebuild that I am about to undergo. I asked rotary what they felt about the bnr turbos and they are impressed with them but the ones that they know of being put on the dyno are and i dont know how to explain this but they are not dynos that measure hp at the wheels they are another kind of dyno that measures it differently I wish i could remember but im stupid and have a bad memory. But they do want to dyno a set to see what they will produce but they still swear by the t78 and i am just wishing that they would put out a ball bearing t78 until then I feel that i am going with the gt35/40. who knows that is still a ways off for me at least 6-8 months but call up rotary performance and talk to them. but that is just me and i dont know much but please do research on them or call up rotary. they do know what they are talking about.
Hey, where did my $$$ go?
Joined: Feb 2001
Posts: 4,413
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From: Bimingham, AL
Originally posted by paw140
Why does the torque level off abruptly at 4700 rpm? Is that where you get full boost?
Why does the torque level off abruptly at 4700 rpm? Is that where you get full boost?
STEPHEN
Hey, where did my $$$ go?
Joined: Feb 2001
Posts: 4,413
Likes: 0
From: Bimingham, AL
Also guys, I still have more safe hp in my tuning. I should be able to get more peak hp as well as a lot more low end hp. I'm running really rich and loading up with fuel till about 3000-4000rpms. One I pull that out they will spool up and build hp even faster.
STEPHEN
STEPHEN
fart on a friends head!!!
Joined: Mar 2002
Posts: 4,104
Likes: 2
From: sheppard AFB, TX
Originally posted by Sparkey
I too was totally blown away by the numbers that the bnr turbo setup is producing. But I walked into Rotary Performance yesterday to get some questions answered about the rebuild that I am about to undergo. I asked rotary what they felt about the bnr turbos and they are impressed with them but the ones that they know of being put on the dyno are and i dont know how to explain this but they are not dynos that measure hp at the wheels they are another kind of dyno that measures it differently I wish i could remember but im stupid and have a bad memory. But they do want to dyno a set to see what they will produce but they still swear by the t78 and i am just wishing that they would put out a ball bearing t78 until then I feel that i am going with the gt35/40. who knows that is still a ways off for me at least 6-8 months but call up rotary performance and talk to them. but that is just me and i dont know much but please do research on them or call up rotary. they do know what they are talking about.
I too was totally blown away by the numbers that the bnr turbo setup is producing. But I walked into Rotary Performance yesterday to get some questions answered about the rebuild that I am about to undergo. I asked rotary what they felt about the bnr turbos and they are impressed with them but the ones that they know of being put on the dyno are and i dont know how to explain this but they are not dynos that measure hp at the wheels they are another kind of dyno that measures it differently I wish i could remember but im stupid and have a bad memory. But they do want to dyno a set to see what they will produce but they still swear by the t78 and i am just wishing that they would put out a ball bearing t78 until then I feel that i am going with the gt35/40. who knows that is still a ways off for me at least 6-8 months but call up rotary performance and talk to them. but that is just me and i dont know much but please do research on them or call up rotary. they do know what they are talking about.
butt-dyno speaks a lot for these turbos. they are faster than any twin i have ever witnessed.
paul
Senior Member
Joined: Feb 2001
Posts: 741
Likes: 1
From: Queens, NY
The PFC reads in kilograms of force per square centimeter. 1.14 kgf/square cm = 16.214612 lbf/square inch (PSI).
It has also been observed that the PFC's boost readings can be off depending on conditions. Sometimes it's dead on and sometimes it can be off by as much as 2 PSI on the low side. So 16-18 PSI is the range you were at. Didn't you say you saw 17 PSI on your boost gauge?
It has also been observed that the PFC's boost readings can be off depending on conditions. Sometimes it's dead on and sometimes it can be off by as much as 2 PSI on the low side. So 16-18 PSI is the range you were at. Didn't you say you saw 17 PSI on your boost gauge?
Last edited by jr; Jan 16, 2003 at 02:19 PM.
Racing is Life.....
Joined: Nov 2001
Posts: 576
Likes: 0
From: Northern California
1.15 = top reading with stock 2bar map sensor
I've confirmed this using a mightyvac on the map sensor. 1.15 *14.22 kg/cm^2= 16.353 psi max reading for the PFC.
Of course, you can go over that in boost, but the PFC won't recognize you're going over that .....
The 3-bar map sensor allows you to go another bar on top of that (30 psi). You'll need the dataloggit to rescale the p side of the 20x20 map if you want to go over 1.4 kg/cm^2 (19.9 psi). Race gas, big injectors, pump(s), big lines, etc. all needed when you decide to go play in that arena (Ari, Steve K, and the other super studs of RX7dom).
Mine is here, but I still have not installed it.
Beast
Of course, you can go over that in boost, but the PFC won't recognize you're going over that .....
The 3-bar map sensor allows you to go another bar on top of that (30 psi). You'll need the dataloggit to rescale the p side of the 20x20 map if you want to go over 1.4 kg/cm^2 (19.9 psi). Race gas, big injectors, pump(s), big lines, etc. all needed when you decide to go play in that arena (Ari, Steve K, and the other super studs of RX7dom).
Mine is here, but I still have not installed it.
Beast
Hey, where did my $$$ go?
Joined: Feb 2001
Posts: 4,413
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From: Bimingham, AL
Originally posted by jr
The PFC reads in kilograms of force per square centimeter. 1.14 kgf/square cm = 16.214612 lbf/square inch (PSI).
It has also been observed that the PFC's boost readings can be off depending on conditions. Sometimes it's dead on and sometimes it can be off by as much as 2 PSI on the low side. So 16-18 PSI is the range you were at. Didn't you say you saw 17 PSI on your boost gauge?
The PFC reads in kilograms of force per square centimeter. 1.14 kgf/square cm = 16.214612 lbf/square inch (PSI).
It has also been observed that the PFC's boost readings can be off depending on conditions. Sometimes it's dead on and sometimes it can be off by as much as 2 PSI on the low side. So 16-18 PSI is the range you were at. Didn't you say you saw 17 PSI on your boost gauge?
Yea, the Power FC wont display any higher than 1.15 without the upgraded map sensor SO, I turn it down just barely below that. The reason is if its showing 1.15 it could be 1.15 or 1.75 and you cant tell with the stock map sensor. I ran into that already lol
Anyway, yes my PFC is showing 1.14 which is 16.22 (as mentioned above). My gauge was showing 17-18 just depending on which side of the needle you go by.
STEPHEN
Hey, where did my $$$ go?
Joined: Feb 2001
Posts: 4,413
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From: Bimingham, AL
Well, my fuel system is 850 primary and 1200 secondary with a Walbro pump.
As for the intake ports, I'm not really sure how much he takes off, its Brians (BNR) standard streetport but I have no idea how it compares to other companies street ports. My exhaust porting is pretty mild.
STEPHEN
As for the intake ports, I'm not really sure how much he takes off, its Brians (BNR) standard streetport but I have no idea how it compares to other companies street ports. My exhaust porting is pretty mild.
STEPHEN
Hey, where did my $$$ go?
Joined: Feb 2001
Posts: 4,413
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From: Bimingham, AL
Hmm, well no one has had them long enough to test about the cracks. Just as a guess I think that is from exhaust heat rather than turbo heat. The exhaust heat will remain so I dont think it'll help....could be way off though.
My idle is rough right now but its from tuning not porting. Once I get my tuning right at idle I'll let you know what it sounds like
STEPHEN
My idle is rough right now but its from tuning not porting. Once I get my tuning right at idle I'll let you know what it sounds like
STEPHEN
Hey, where did my $$$ go?
Joined: Feb 2001
Posts: 4,413
Likes: 0
From: Bimingham, AL
For anyone that pulls up this thread trying to do research, I traped 125 in the 1/4 and 98 in the 1/8 which driving like I was just pulling away from a red light haha, I drug it out of the hole really slow due to me still having the stock rear end.
That was with a totally full tank of fuel, sub, spare wheel/jack, ect ect ect. With all that gone and actually launching my car I should pick up another 2-3mph. In addition I think I still have around another safe 20rwhp in tuning. All this togather is going to place me into the high 120's which is enough to run well into the 10's!!!!
Here is the link to the thread about the trip to the drag strip....
https://www.rx7club.com/forum/showth...5&pagenumber=1
STEPHEN
That was with a totally full tank of fuel, sub, spare wheel/jack, ect ect ect. With all that gone and actually launching my car I should pick up another 2-3mph. In addition I think I still have around another safe 20rwhp in tuning. All this togather is going to place me into the high 120's which is enough to run well into the 10's!!!!
Here is the link to the thread about the trip to the drag strip....
https://www.rx7club.com/forum/showth...5&pagenumber=1
STEPHEN
Last edited by SPOautos; Jan 20, 2003 at 12:35 AM.