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RX-7 3rd Gen Specific (1993-2002) RX-7 1993-2002 Discussion including performance modifications and Technical Support Sections. |
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#16 | |
Boost Addict
Join Date: Aug 2008
Location: Elgin IL
Posts: 13
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Quote:
Maybe I do need to spend the $$ on AI and start running a water meth mix to get more. |
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#17 |
Rotary Fan in Training
Join Date: Feb 2008
Posts: 58
Rep Power: 18 ![]() |
I think those numbers are reasonable as well. With 10 psi on bolt-ons, stock ports, stock fuel, RP mapped ECU, & stock seq. turbos I dyno'd 300whp uncorrected on a humid 95 degree day with NO FAN, lol heatsoak. The corrected number was 321whp, but the SAE correction isn't really accurate for turbocharged engines. (Dynojet numbers)
I ran at 14 psi occasionally and that car pulled like a raped ape up top. AFR's were solid, although I'm sure I was close to maxing out the injectors. I never took the car to the track, but on the street I was able to easily run down a few low 12 second cars.
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'93 RX-7 (GT3574 track toy) '74 Triumph TR6 (weekend cruiser) ![]() |
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#18 |
600rwhp club member.
Join Date: Mar 2008
Posts: 551
Rep Power: 18 ![]() |
Thats the ticket... Go to the track and get a trap speed, that tells all..
I am trying to go back and find my stock twin dyno. It was 323 at around 13-14psi. Bottom line is stock twins are a blast to drive. I had mine going 7.8's in the 1/8th back 10yrs ago with just intake, exhaust, pettit IC and PFC computer. |
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#19 |
Rotary Fanatic
Join Date: Mar 2008
Location: Freedom Land
Posts: 316
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i assume everyone with full exhaust also port their wastegates and installed boost controllers?
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This is going to tear |
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#20 |
Boost Addict
Join Date: Aug 2008
Location: Elgin IL
Posts: 13
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My wastegate is stock, and I have boost controlled by the PFC through Injector Duty Cycle. In the cold temps boost will push 13.5 psi, but in 60degree + I typicall top out at 12.5psi
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#21 |
Rotary Fan in Training
Join Date: Feb 2008
Location: Bay Area CA
Posts: 91
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Pretty cool. Would you happen to have a better view of the dyno plot? I'd like to see the low end of it as well.
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93 Vintage Red R1 Power: Street Ported Motor, 99 Twins, V-mount, DP>SMB cat/MP> RB cat back, PFC, 1300cc secondaries, Fuel Pump, ACT clutch, RB lwfw, etc Steve Kan tuned - 310rwhp at 10PSI Suspension: Tripoint custom valved Koni + Ground Control coilovers, Eibach sway bars, SuperPro bushings, Corner Balanced and accurately aligned Brakes: RacingBrake 4 corner BBK SSR Integrale 17"x9" +45, Dunlop Star Specs 255/40 |
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#22 | |
Viable Fossil
Join Date: Mar 2008
Location: Mid-West
Posts: 199
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I'm not certain you'd get all that much of a challenge from the "other forum". I seem to remember some of the established guys there already mentioning serious gains to be made just with a DP, hi-flow cat and cat-back. Can't remember for sure, but the figure of 20 whp as being tossed around.
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Jim VR R1 FD |
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#23 |
Boost Addict
Join Date: Aug 2008
Location: Elgin IL
Posts: 13
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Here is my car's dyno sheet from last may.
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#24 |
Rotary Fan in Training
Join Date: Jun 2008
Posts: 38
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Interesting.
Im making 336whp on a 99 motor, twins, 93 PFC, full 3" exhaust, intakes, and stock intercooler. However I am maxing out my injectors, need to upgrade to a SMIC, and properly duct it. Looking for 360whp ish. |
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#25 | |||
Rotary Fanatic
Join Date: Mar 2008
Location: Sask, Canada
Posts: 181
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Quote:
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#26 |
Viable Fossil
Join Date: Mar 2008
Location: Mid-West
Posts: 199
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They're more efficient.....yes. Quicker spool...OK. But at a given pressure and at given intake temp...say stock boost levels.....10 psi is still 10 psi isn't it? No difference in max hp at the dyno. Or am I missing something?
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Jim VR R1 FD Last edited by Signal 2; 04-08-2009 at 07:12 PM. |
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#27 |
Rotary Fanatic
Join Date: Feb 2008
Location: B'ham, AL
Posts: 329
Rep Power: 18 ![]() |
Not necessarily. If they flow better, then 10psi is more hp than the one that doesn't flow as good, which is why most singles make more hp at the same boost level as twins. Boost is just backed up flow that can't get through the engine.
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1993 Rx-7 SM2 #11 At the local AutoX: http://www.youtube.com/watch?v=9VOSQkkSLQs Speed for Sale shootout 2007: http://www.youtube.com/watch?v=JiqlyAkGmpg A few laps at Barbers: http://www.youtube.com/watch?v=6_h5q...x=0&playnext=1 |
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#28 |
Rotary Fanatic
Join Date: Feb 2008
Location: Smyrna, TN, USA
Posts: 239
Rep Power: 18 ![]() |
Also a more efficient turbo puts out less heat at the same pressure which will add to the HP gains.
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#29 |
Rotary Fanatic
Join Date: Feb 2008
Location: Madison Alabama
Posts: 115
Rep Power: 18 ![]() |
The car has a y-pipe, exhaust with high flow cat, RB dual tip, down pipe, commander stand alone ecu, 99 spec turbo's, a careful rebuild on the engine, K&N air filter and Mazdaspeed inter-cooler. I expected about 300 HP to the rear wheels with this setup at 10 PSI and got 294, 12 PSI got me 314, about right. Intake is stock
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