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dyno wierd

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Old 27-Jun-2007, 08:22 PM
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dyno wierd

i dynod my car last month in cooler temperature at 171. Today i dynod my car same dyno and tuner at 161 ANd an off air fuel.....whats up with that


and i ended up with 187 and 146 tq b20 ztec
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Old 28-Jun-2007, 09:40 AM
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well, the question is, how can i get it tuned last month for 171 and today it be 161....IS that wierd
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Old 28-Jun-2007, 10:07 AM
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well ambient temperature has a lot to do with it....if its hotter outside, the hotter, less dense air will result in less power, compared to the colder, more dense air.
Also, wheel/tire size will affect the power output while on the dyno.
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Old 28-Jun-2007, 11:04 AM
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im on teh same wheels and same dyno with the same tuner

does that mean its better to tune the car on a cooler day..my tuner said that its better to tune on a hot day so u can get the worst case scenerio..As the temp gets cooler, the ecu will correct itself
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Old 28-Jun-2007, 01:13 PM
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hot air is less dense which yields less power...think about it...cold air intake, intercoolers, intercooler coolers, dudes icing down intakes, hondata intake manifold gaskets

cooler air more power...tune on a hot day and get the most out of the engine with hotta air...in theory when its cooler the results will be better
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Old 28-Jun-2007, 01:58 PM
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When its cold outside it makes makes a HUGE difference in the amount of power my car makes. Night and day.
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Old 28-Jun-2007, 03:36 PM
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SO i tuned in 41 degrees..nice..........i hope it doesnt get any hotter outside
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Old 28-Jun-2007, 03:46 PM
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well just like your tuner said that as the air gets cooler the ECU will correct itself, the same applies for when the air gets hotter.
This is the nice thing about using a honda ecu for our tuning needs....it has IAT and ECT corrections, that don't need lots and lots of manipulating to get the car to run well under all different conditions.
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Old 29-Jun-2007, 01:59 PM
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but does my dyno reading sound normal for a b20 z vtec, type r cams, megan header, type r intake manifold, type r tb, prelude injectors, walboro fuel pump , j's racing short ram intake, omni valve springs, omni retainers, str cam gears, unorthodiox pullys, no power stearing and no air condition ,2.5 inch crush piping, magna flow, high flow cat, and a no name twin loop exhaust. i believe it has 2.5 inch inlet

and obd1 dyno tuned
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Old 29-Jun-2007, 02:04 PM
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ya, sounds about normal.
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Old 29-Jun-2007, 03:39 PM
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what can i do to get more power...without turbo or ripin the motor apart .....any bolt on im missing..what about the test PIPE
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Old 29-Jun-2007, 04:00 PM
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test pipe will yeild minimal gains.
Did your tuner tune the cam gears? Or are they just at the stock settings?
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Old 29-Jun-2007, 04:13 PM
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i was told if i touch the cams the piston to valve contact would happen
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Old 29-Jun-2007, 04:14 PM
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no he didnt touch the cam gears
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Old 29-Jun-2007, 04:21 PM
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see thats the problem with b20vtecs....the b20 pistons have very small valve reliefs (compared to the vtec pistons). So if you have cams with lots of lift or simply too much overlap, or the intake valve opening too early you take the chance of smashing the valves with the piston.
A good header, like SMSP, RMF, Rage, Hytech, F1 racing, etc etc will get you more power than any off-the-shelf header will....but good headers are expensive.
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Old 30-Jun-2007, 07:56 PM
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well i paid about 350 for mine...Im asuming those headers cost in the 1000 dollar range..Plus are the gains minimal like 2 whp cause a test pipe might yield that
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Old 01-Jul-2007, 01:15 AM
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um.....no
i've seen a "good" header yeild upwards of like 10-15whp over an off the shelf header, especially a cheap, knock off brand like megan.
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Old 01-Jul-2007, 02:50 AM
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Originally posted by nadir
what can i do to get more power...without turbo or ripin the motor apart .....any bolt on im missing..what about the test PIPE
Nitrous. 50 hp at the touch of a button.
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Old 01-Jul-2007, 11:20 AM
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blow your load in the intake manifold 100 hp.
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Old 01-Jul-2007, 12:30 PM
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Originally posted by trigga
blow your load in the intake manifold 100 hp.
hahaah post of the year dude
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