Anyone run the newer 6765 BILLET turbo??
03-05-11, 07:09 PM
#253
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thewired, yeah I know, I tend to forget sometimes how much dynos can vary.
03-05-11, 09:08 PM
#256
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it wasn't even a gtx, it was a 3574 at 17.5 psi, no dyno sheet though
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/how-go-single-turbo-set-up-sequential-twins-938762/page2/
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/how-go-single-turbo-set-up-sequential-twins-938762/page2/
03-06-11, 11:55 PM
#258
That's my thoughts. Didn't even bother watching fuel pressure. We made one (aborted) pull at the 16 psi boost level, saw the trend in injector DC v. AFR and the power it was making and decided we didn't need to push the little Walbro any further.
FWIW, I've done back-to-back testing on this Dyno Dynamics and a Dynojet. We saw exactly 15% higher numbers on the Dynojet with a car that made right at 400 whp on the Dynojet. Dynojet numbers are very repeatable from one dyno to the next and they have dynos everywhere, so I usually reference those numbers.
03-07-11, 12:36 AM
#259
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FWIW, I've done back-to-back testing on this Dyno Dynamics and a Dynojet. We saw exactly 15% higher numbers on the Dynojet with a car that made right at 400 whp on the Dynojet. Dynojet numbers are very repeatable from one dyno to the next and they have dynos everywhere, so I usually reference those numbers.
03-07-11, 08:05 AM
#261
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Thing is, my 500R (which I've had installed for around 4 years now) stacks up pretty well against this turbo. What exactly are you guys gaining? Transient response? At the boost levels discussed, I'm not seeing the benefit. BTW, this is exactly what Bryan at BNR told me when I asked him about billet wheels a long while back when they first hit the market.
03-07-11, 06:38 PM
#262
rich i think the advantages will be in the high boost level 22psi or more. again it will be minimal, as i spoke with enzo about the design and p trim size turbine wheel that the 6765 has. he seems to think its going to be limited to 25-27psi due to the turbine wheel. if i had known a bit more before hand i would have bought the 6768 billet. the compressor wheel is designed for high boost as it does have the surface area of a 71mm cast compressor wheel. on the supraforums you start to see a good jump in power at 22+psi over a normal 67mm wheel. on a supra they see 700whp at 30psi out of a cast 67mm and 800whp at 30psi out of a billet 67. the evos can run silly boost so the billets are the best thing since sliced bread for them. they gain close to 200whp in the 40+psi boost levels.
03-08-11, 02:24 AM
#263
Seems like that's a safe assumption based on all that's been posted here.
Thing is, my 500R (which I've had installed for around 4 years now) stacks up pretty well against this turbo. What exactly are you guys gaining? Transient response? At the boost levels discussed, I'm not seeing the benefit. BTW, this is exactly what Bryan at BNR told me when I asked him about billet wheels a long while back when they first hit the market.
Thing is, my 500R (which I've had installed for around 4 years now) stacks up pretty well against this turbo. What exactly are you guys gaining? Transient response? At the boost levels discussed, I'm not seeing the benefit. BTW, this is exactly what Bryan at BNR told me when I asked him about billet wheels a long while back when they first hit the market.
03-09-11, 12:14 AM
#265
Agreed.
Seems like that's a safe assumption based on all that's been posted here.
Thing is, my 500R (which I've had installed for around 4 years now) stacks up pretty well against this turbo. What exactly are you guys gaining? Transient response? At the boost levels discussed, I'm not seeing the benefit. BTW, this is exactly what Bryan at BNR told me when I asked him about billet wheels a long while back when they first hit the market.
Thing is, my 500R (which I've had installed for around 4 years now) stacks up pretty well against this turbo. What exactly are you guys gaining? Transient response? At the boost levels discussed, I'm not seeing the benefit. BTW, this is exactly what Bryan at BNR told me when I asked him about billet wheels a long while back when they first hit the market.
03-09-11, 03:48 PM
#268
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Howard's car is not back together yet 
Also I am interested in the Aspec 500 and the 6765. They are not being tested in Howard's thread.
On one hand you have Rich speaking very highly of the aspec 500 (as do MANY people on the forum). On the other you have thewird who has ran both the aspec 500, and is now on his second 6765.
It sounds like both turbos will get around the 500HP mark but I would be interested in seeing back to back comparisons.
Things like
Power under the curve
What one has better response
Does one produce more power than the other.
Also I am interested in the Aspec 500 and the 6765. They are not being tested in Howard's thread.
On one hand you have Rich speaking very highly of the aspec 500 (as do MANY people on the forum). On the other you have thewird who has ran both the aspec 500, and is now on his second 6765.
It sounds like both turbos will get around the 500HP mark but I would be interested in seeing back to back comparisons.
Things like
Power under the curve
What one has better response
Does one produce more power than the other.
03-09-11, 03:56 PM
#269
Howard's car is not back together yet
Also I am interested in the Aspec 500 and the 6765. They are not being tested in Howard's thread.
On one hand you have Rich speaking very highly of the aspec 500 (as do MANY people on the forum). On the other you have thewird who has ran both the aspec 500, and is now on his second 6765.
It sounds like both turbos will get around the 500HP mark but I would be interested in seeing back to back comparisons.
Things like
Power under the curve
What one has better response
Does one produce more power than the other.
Also I am interested in the Aspec 500 and the 6765. They are not being tested in Howard's thread.
On one hand you have Rich speaking very highly of the aspec 500 (as do MANY people on the forum). On the other you have thewird who has ran both the aspec 500, and is now on his second 6765.
It sounds like both turbos will get around the 500HP mark but I would be interested in seeing back to back comparisons.
Things like
Power under the curve
What one has better response
Does one produce more power than the other.
Howard's stuff will be done this week so it's almost perfect timing for you.
Last edited by TheAsset; 03-09-11 at 03:59 PM.
03-09-11, 04:07 PM
#270
Double_J, the 500R is indeed an awesome turbo and I loved it when I had it. However, if you stick a 0.84 A/R divided housing on a 6765, the response will be pretty identical to the 500R imo. Except the difference would be the turbo has more potential at higher boost as well as doing it more efficiently. However, the 0.84 turbine housing would also be a restriction for what the turbo can do which is why I do not use it, and instead use the 1.00. I noticed an improvement when I put it on my car with nothing changed in the car so I know it definitely is better. Unfortunately I did too many changes to the car last year and with all the exhaust leak issues I had never got the car to its prime but that will be different this year as I want to track it seriously again this year.
Maybe consider trying the new EFR turbo's with their lightweight turbine. I'm sure that will improve response however your going to have to get someone to make a manifold for it.
Anyway, lending the old 6765 to Rich would be a good test and I don't mind since I have no use for it atm.
thewird
Maybe consider trying the new EFR turbo's with their lightweight turbine. I'm sure that will improve response however your going to have to get someone to make a manifold for it.
Anyway, lending the old 6765 to Rich would be a good test and I don't mind since I have no use for it atm.
thewird
03-14-11, 11:47 PM
#272
here is a little taste of the 6765 at 24psi. this happened completely on accident as i expected it to be at 15psi. so this was 24psi base tuned for race gas but 93 was in the tank. rpms went from 4500-6k and i let off. first thing that came to mind when it started pulling was this is way to strong for 15psi so i let out right away. i then looked over to a reading of 24psi. no knock came up on the pfc....
http://www.youtube.com/watch?v=ebAzi0bz8jE
http://www.youtube.com/watch?v=ebAzi0bz8jE
03-17-11, 10:08 AM
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Here is my last dyno I did with my HTA3586R T3 23psi and 17-18psi (I was having trouble with EBC stabilizing boost). This should give you an idea of what the 62mm billet wheels can do. I believe this turbo is similar to a 6262 with the only difference being that my exducer is a 86mm instead of 68mm. I think for road race purposes the 6262 is perfect. My motor had bad compression shortly after so I am not sure if the last run caused it or if it was already beat.
Anyways...Ignore the A/F sensor kept blowing out so I used my in car gauge to tune.
Anyways...Ignore the A/F sensor kept blowing out so I used my in car gauge to tune.