TwinTurbo.NET: Nissan 300ZX forum - You have it completely backwards >>>>
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Subject You have it completely backwards >>>>
     
Posted by wesman [92TT-less ] on March 31, 2002 at 10:32 AM
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In Reply To Well I run 93 All the time ... Hey Nixit>>> posted by minorleaguer (Justin) on March 31, 2002 at 12:44 AM
     
Message : About timing... I hear 15 BTDC for economic, and 13BTDC for HP.. but no further than 13.... comments?

Stock is 15 +/- 2 degrees....so :

13 is retarding the timing,lowering combustion temps inside the engine, thus producing less hp

17 is advancing, raiosing temps and spark, thus improving performance, but also because of the high temps, increasing chances of detonation.

: Well I am just gonna tune her up (new plugs, fuel filter, check timing etc.. then do a compression test... then if all is well... off to another dyno I go.. =)

: So what do you think... 14.7 or 13.5 ...say ideal is 14.7.... 13.5 would be a tad lean.. but creating a tad more HP without hardly any risk of engine damage.... am i correct on this?

You have this backward as well. the 14.7 number would be leaner than the 13.5. The higher the number the more lean you are running.

Just FYI--On a turbo car a safe place is 12.5...higher than that and you are running lean, lower you will get a bit less performance but a larger margin of safety.

--wes


"Oh,it's a broke ass SGP auto"

"Opinions expressed are my own....if you don't like them.....tough shit!!!" ----Wesley J. Strong







So, which Formula 1 Car are you most like?




wesman
Super White Stage XII+ 92TT
Super Black Stage XI+ 94TT
Onyx '93 Stage II+ Convertible w/ Full WW kit
'99 Jeep Wrangler Stage "A Bunch,but not as much as Nixit's :)"
and a Chrome Silver 350Z on the way :)

     
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