2nd Generation Specific 1986-1992 Discussion

Dyno Tii

Old 03-03-2005, 09:57 PM
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this past monday me and my brother went to the dyno to get the his rx7 tuned it has a haltech .he has a s5 engine with an extreme street port .now i was told that street porting an engine was suppose to give you big power gain and all .but i feel something went wrong with the dyno or somehthing because we dint get that much power .the car was tuned on a (MD) mustang dyno....on a dyno jet add 18.8% thats what the tuner said



he ran the car untuned and got about 140(MD) rear wheel horse power after 3 hours of tuning the car ran 199.8 (md) rear wheel horse power at 12 psi thats about 237 rear wheel horse power on a dyno jet which is were most people dyno there cars.



we were expecting around 260(md) at wheels







so do you guys think ........is the reading is some what right or its wrong



or should it be more or less?
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Old 03-03-2005, 10:56 PM
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Are you still using the stock turbo with this streetport?
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Old 03-04-2005, 09:13 AM
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Yeah, what other mods have been done to the car? Any restrictions on the intake or exhaust? Is this tuner experienced with turbo rotaries?



I've never had my car on a dyno, but based on my 1/4-mile trap speed and 2800 lbs. weight, I'm guesstimating about 240 RWHP, and that's on a tired old stock block with a hybrid and a little extra fuel and a Haltech and 3" exhaust, etc. etc.



Dragstrip dyno works for me. Just start a little rich on the fuel, log some data, and go from there.
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Old 03-04-2005, 10:02 AM
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what kind of exhaust on the car?
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Old 03-11-2005, 12:50 PM
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the car has the stock s5 turbo with racing beat down pipe,and silencer,and an apexi muffer and its ALL 3"
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Old 03-11-2005, 12:54 PM
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Originally Posted by spooliNrx7' date='Mar 3 2005, 08:56 PM
Are you still using the stock turbo with this streetport?





SADLY YES BUT NOT FOR LONG
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Old 03-21-2005, 01:54 AM
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sounds about right for me.
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Old 03-21-2005, 05:01 AM
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what kind of computer is in the car?

can you send a map?
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Old 03-22-2005, 05:49 PM
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[quote name='guitarjunkie28' date='Mar 21 2005, 03:01 AM']what kind of computer is in the car?

can you send a map?

[snapback]688704[/snapback]

[/quote]

my brothers got a haltech f9



i can give a map but it will take a few days cuz his no home right now
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Old 03-23-2005, 04:31 AM
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sounds right about me.
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