Timing retard for a 100 or a 200 shot...
06-17-2009, 09:56 AM
#21
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get your n/a tune running strong first, forget about the 200 for now, just start with a 75w and see where your afr is first. once you get the aft around 12.0, then you will know if takes one or two fuel jet sizes to get to 12.afr. follow the same pattern with the 100w with a new set of plugs and ck. them after the first run, if youre timing mark is where it needs to be, cut the plug and see if you want to go leaner. the 200 on 91oct is a risky plan on stock compression, i would not run it until i'm sure the 100 is optimal. do you know your compression?
Arp head studs and cometic gasket.
Also have full exhaust with long tubes. And a walbro fuel pump. Will have aem wideband on dash and aeroforce scangauge to monitor kr and timing.
In your opinion what would be the largest safe size on 91 octane?
06-17-2009, 10:36 AM
#22
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Like stated above, checking your plugs is the BEST way to know how much timing you need. You cant just say 24* for 200hp and it will be universal for any application. AFR with a wideband and timing with plug checking.
06-17-2009, 11:11 AM
#23
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My compression is around 11 to 1.
Arp head studs and cometic gasket.
Also have full exhaust with long tubes. And a walbro fuel pump. Will have aem wideband on dash and aeroforce scangauge to monitor kr and timing.
In your opinion what would be the largest safe size on 91 octane?
Arp head studs and cometic gasket.
Also have full exhaust with long tubes. And a walbro fuel pump. Will have aem wideband on dash and aeroforce scangauge to monitor kr and timing.
In your opinion what would be the largest safe size on 91 octane?
06-17-2009, 11:13 AM
#24
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on 100 shot and good fuel i would start around 22-24 and read the plugs. going to guess 24-26 is safe with good fuel.
pull 4 more on the 200 shot and see how it looks.
on stock cars i run 24-26* on 100 shot and good fuel
pull 4 more on the 200 shot and see how it looks.
on stock cars i run 24-26* on 100 shot and good fuel
06-17-2009, 12:05 PM
#25
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i have sprayed 150 on sunnoco93oct and about 16* timing with high flow cats in place, you may be able to swing it with cold non-protruding plugs, especially if you don't have cats. i spray the 150 with denso it-22 set at .045 and the 200 with it-27 set at .035 . i would pm robert56 and ask him , i know he ran his ls1 on the edge for a while, i just don't know if he was on higher oct. numbers with the bigger shots he sprayed. my gut feeling about spraying 200 though, would be no go! the other detail you need to know is what gap the rings were set for. good luck!
I have kooks high flow cats and gapped my plugs at 35.
06-17-2009, 12:40 PM
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06-17-2009, 01:06 PM
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Sorry to but in, but could someone answer a simple question. Is it just me, or do you guys with LS motors have to pull more timing than us poor suckers that are still runnin an LT1? Thanks
