Bone Stock '91 NA! - NoPistons -Mazda Rx7 & Rx8 Rotary Forum
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Old 08-02-2011, 11:03 PM   #1
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I go to school for Auto/Diesel and we have a dyno...soo i threw it on there for a baseline.



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Well I did 111whp @ 6600rpm and 108wtq at 4400rpm. Not to bad for a Twenty year old!



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Old 08-02-2011, 11:24 PM   #2
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Nice looking car!
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Old 08-02-2011, 11:29 PM   #3
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whats with the horrible dip
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Old 08-03-2011, 10:18 PM   #4
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Those numbers are low, a stock S5 should make 125-130 whp. First guess would be oem cats are clogged. Also, your power peak should be a little higher, like 7000-7500 rpm, and not fall off as sharply.



But it is a very pretty car.
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Old 08-21-2011, 01:11 PM   #5
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Yes , very nice car... Not bad, considering new Rx-8's dyno 160'ish.....But I agree with MS7, there is some power hidden in that car.
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Old 09-14-2011, 11:25 PM   #6
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Are your auxilliary ports opening? looks like you dip right when they should open.
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Old 09-15-2011, 01:49 AM   #7
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Originally Posted by RobertWhite View Post
Are your auxilliary ports opening? looks like you dip right when they should open.




I agree, you can see where the VDI switches at 5200 rpm, but there should be a similar rise at 3800 rpm, and the torque shouldnt fall nearly as fast. Definitely want to check those aux ports.
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Old 12-28-2011, 01:36 AM   #8
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My vert's auxillary ports were stuck shut from carbon.



A bit of seafoam down the intake allowed me to free it up by hand with the actuators removed. the trick being to free them up by hand before restarting the car when seafoaming. I spent 5-10 minutes moving them through their entire range of motion by hand. Putting it through the large line that goes to the oil filler neck will get the seafoam where you need it, but using that method you'll have to add seafoam with the engine heated up, and off because she will stall before you ever get the seafoam in. I added seafoam using that method 2 times in one day. cleaned up my idle significantly also. I put a half can in the first time, and 3/4 the second.



Note that with the amount of seafoam I used you have to crank her at full throttle to get her to start and keep the throttle open for her to remain running, after about 30 seconds to a minute it should be able to idle on its own again.



its basically flooded once you add the seafoam like I did. once it can idle on its own thrash on her a bit. It will smoke ALOT. I mean alot, my neighbors thought a house was on fire when I started her back up, make sure you have the exhaust pointed downwind or you wont be able to see **** for a few upon restarting the engine.



I have my intake manifold off and its VERY apparent where the seafoam cleaned the lower intake runner for the secondary ports. I can snap a picture if you'd like.
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Old 04-21-2012, 09:29 PM   #9
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Lil update on this car. That's my brother that posted. We co own the car. Anyway, car started having starting and overheating issues. Got it torn apart (aux ports were stuck for the dyno) and the engine had a coolant seal wall failure on the front iron. Currently doing a rebuild with a large street port and supporting mods.
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Old 04-22-2012, 08:22 AM   #10
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Kkeep. Us posted
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