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RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.

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Old 10-16-2011, 07:24 PM   #1
Judge Ito
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Quote:
Originally Posted by Mazdabater View Post
And we are both flogging dead horses here I'll just shutup and wait for the results next time at the strip.
I told you to sit back relax and wait for results. she improves to 12.8@108.80mph on this run the car started to drift around the 1000ft mark and she pedaled it on and off(one tire had low tire pressure) and she pulled that time. rx7 has more in it. no clutch slippage at this time..
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File Type: jpg sierra's 12.8@108.80mph.JPG (14.6 KB, 22 views)
File Type: jpg sierra's 12.8 on 10-16-11.jpg (53.6 KB, 15 views)
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Old 10-16-2011, 07:28 PM   #2
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Sierra just before her 12.8 run..
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Old 10-12-2011, 09:31 AM   #3
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ITO, i'm not hating on you here, but all signs here point to "hybrid stock turbo."

looks like a BNR stage 1, or maybe a t04b v-trim fitted into the stock compressor housing.
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Old 10-12-2011, 05:33 PM   #4
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Quote:
Originally Posted by jacobcartmill View Post
ITO, i'm not hating on you here, but all signs here point to "hybrid stock turbo."

looks like a BNR stage 1, or maybe a t04b v-trim fitted into the stock compressor housing.
to my knowledge is a stock series 5 turbo. here i have a picture of the ported engine installation. there you could see the factory turbo with factory compressor. that is my kid Sierra helping with the install.
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Old 10-12-2011, 01:50 PM   #5
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I kind of agree with RETed on this one. Good points.
His dyno video does show a top mount IC.
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Old 10-12-2011, 06:54 PM   #6
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(quote)..In my experience, the stock turbo is only good for 240 - 250hp at the wheels ...i made 265 on a stock s5 turbo on a ported 12a block...12a turbo dyno.jpg....it is possible..good job Ito....
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Old 10-13-2011, 01:56 AM   #7
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Dyno sheets dont mean shit at the end of the day. I had one of the bigger rotary workshops give me a dyno sheet that read 450hp, it didnt feel like 450hp, turned out on another dyno to only make 313hp. You can fudge dyno figures. Known fact. Not saying it happened in this case but I'm saying the real world results > dyno numbers. So many rotors over here in aus have dyno sheets that read 450 - 500hp and still only trap 110mph down the strip. This is probably what makes me so skeptical of things these days.
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Old 10-13-2011, 07:39 AM   #8
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Quote:
Originally Posted by Mazdabater View Post
Dyno sheets dont mean shit at the end of the day. I had one of the bigger rotary workshops give me a dyno sheet that read 450hp, it didnt feel like 450hp, turned out on another dyno to only make 313hp. You can fudge dyno figures. Known fact. Not saying it happened in this case but I'm saying the real world results > dyno numbers. So many rotors over here in aus have dyno sheets that read 450 - 500hp and still only trap 110mph down the strip. This is probably what makes me so skeptical of things these days.
I see your point but I'm not in Australia, over the years I have posted 100% accurate dyno numbers on what ever rotary car I was working at the moment. never inflated or false numbers. no need for that. i'm on the hunt for real results. clutch on this rx7 is already fixed and waiting for the weekend.
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Old 10-13-2011, 05:47 PM   #9
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that does not sound like a stock turbo.. when i had my s5 turbo maxed out, it made 250whp, boost dropped from 9psi to 6psi by redline, running off stock wastegate spring. If turned up the boost, the torque curve would just get better.. peak power wouldnt budge at 250whp.

the fact you gained 10 hp by upping the boost to 10psi shows me your turbo is modified.. maybe something similar to a BNR stage 1, where it looks stock because the compressor housing is milled out for bigger wheel. or maybe your hot side wheel is melted or chipped, creating the affect of a clipped wheel. who knows

I like the simplicity of your mods. people think im crazy when i just tell them just to throw some bigger secondaries in, retard the CAS by 5 deg and have at it on the stock ecu. my brother's high-comp n/a is turbo'd using 720cc sec's, TII maf, and retarded CAS and its been running 6 psi for about a year now with no problems. this results in AFRs in the 11's in boost. it leans out up top, but its because he is still running stock fuel pump.

dont believe all the advice you see on the forums, most of the time its people just regurgitating what they have read and never tried themselves
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Old 10-14-2011, 04:01 AM   #10
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transmission had a 5th gear synchro broken and a few internal parts rattled up. fixed everything and took it for a drive, trans is behaving better and the new clutch is also reacting quicker. weather has been shitty so updates will be posted soon..
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Old 10-16-2011, 07:17 PM   #11
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Quote:
Originally Posted by 88turboii View Post
that does not sound like a stock turbo.. when i had my s5 turbo maxed out, it made 250whp, boost dropped from 9psi to 6psi by redline, running off stock wastegate spring. If turned up the boost, the torque curve would just get better.. peak power wouldnt budge at 250whp.

the fact you gained 10 hp by upping the boost to 10psi shows me your turbo is modified.. maybe something similar to a BNR stage 1, where it looks stock because the compressor housing is milled out for bigger wheel. or maybe your hot side wheel is melted or chipped, creating the affect of a clipped wheel. who knows

I like the simplicity of your mods. people think im crazy when i just tell them just to throw some bigger secondaries in, retard the CAS by 5 deg and have at it on the stock ecu. my brother's high-comp n/a is turbo'd using 720cc sec's, TII maf, and retarded CAS and its been running 6 psi for about a year now with no problems. this results in AFRs in the 11's in boost. it leans out up top, but its because he is still running stock fuel pump.

dont believe all the advice you see on the forums, most of the time its people just regurgitating what they have read and never tried themselves
I have another series 5 turbo at my shop and I took a good look at both of the turbos. the 1 on my kid's car and the other series 5 I have spare. I came to 1 conclusion, they are both B.S.T. turbo's BST= BONE STOCK TURBOS..
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Old 10-16-2011, 07:39 PM   #12
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A little more seat time & she will be on her way to a mid 12 sec run.
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Old 10-16-2011, 08:10 PM   #13
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A little more seat time & she will be on her way to a mid 12 sec run.
your correct..
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Old 10-16-2011, 09:31 PM   #14
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Well I stand corrected. Incredible results for a stock turbo.
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Old 10-16-2011, 10:00 PM   #15
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How freaky, she looks just like my sister when she was her age.
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