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ed_ma61
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Re: 7mge tuning, pinging, AFR's and other crap... LONG Tue, 20 January 2004 04:17 Go to previous messageGo to previous message
gianttomato wrote on Tue, 20 January 2004 00:07


Unfortunately, Ed can't have his cake AND eat it too. He can't run 37-38 degrees total advance AND and have nearly 11:1 comp. He will just have to dial back the timing


been here, done this Confused

for starters, 37-38deg? its set at about 15 on top of a static 10, so lets say 25. what the ecu does with this from here, i dont know.

thing is however, ive dialled back the timing considerably, and the engine turns into a rolling turd-mobile. idle quality, and power off idle goes to utter shit, and in that 3.5-4k hole, the engine bogs down amazingly. it really really doesnt like the timing kicked back like that at all. and thats not me being greedy, thats me listening to the engine, and feeling its response. theres more timing in it if i wanted to wind it right up, but ive simply set it to where the engine sounds/feels happiest. trust me when i say its totally crap and unwell with low advance (i guess youd have to drive it)...

as for the ign advance being responsible for the pinging: not necessarily... TWO causes of pinging - pre ignition (ignited explosion:: hot spot, hot plug, ign adv too far) and detonation (spontaneously detonated explosion:: combustion chamber pressure, comb charge temp, engine load). i think i have the latter... and im presently thinking its related to the cam timing.

i know, dave, that it must sound like ive just wound up the ign tmiming, and now its pinging. trust me when i say i wish it were that simple, as id be happy as shit to fix it so simply. however, whats going on is really damn confusing, and far more complicated than that. the very nature of this flat spot is what is producing the conditions casing the detonation. i wish you could drive it, and youd be sitting, saying "what the fuck just happened there" ?? the engine really hits a wall. the engine sound totally changes, power dops right off. she feels really 'thin' (if that makes sense: she feels weak and fragile, shallow. as opposed to feeling totally grunty, phat, and full of life everywhere else in the rpm range). and its ONLY at this point that the pinging occurs. NOWHERE else in the rpm range, under damn heavy loads at WOT is there even a suggestion of knock. instead she is totaly on song, and hauling ass...

"its really odd"

franky:: its definitely NOT the ACIS. i disconnected this last night, and it made abs ZERO difference to whats going on. sure, the induction note doesnt have the funky change it used to, but the flat spot is still dogs balls obvious.

stewart:: i too have apprx 30% squish, with highly polished chambers, pent roof etc etc. running 98 mobil 8000 aswell. timing as stated above (not that crazy)

[Updated on: Tue, 20 January 2004 04:46]

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Read Message   7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Sun, 18 January 2004 14:13
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG thechucksterSun, 18 January 2004 14:25
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Sun, 18 January 2004 14:37
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG clubagreenieSun, 18 January 2004 20:46
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG sideshowSun, 18 January 2004 22:19
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG gianttomatoSun, 18 January 2004 23:19
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG NorbieSun, 18 January 2004 23:29
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Mon, 19 January 2004 01:19
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG thechucksterMon, 19 January 2004 01:25
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG justcallmefrankMon, 19 January 2004 05:03
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Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG chrisssMon, 19 January 2004 12:22
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG gianttomatoMon, 19 January 2004 13:07
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG oldcorollasMon, 19 January 2004 13:21
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG  ed_ma61Tue, 20 January 2004 04:17
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Tue, 20 January 2004 04:27
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG oldcorollasTue, 20 January 2004 04:38
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG thechucksterTue, 20 January 2004 04:50
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Tue, 20 January 2004 04:59
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Tue, 20 January 2004 04:56
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Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Tue, 20 January 2004 09:21
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG MS-75Tue, 20 January 2004 06:13
Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Tue, 20 January 2004 12:33
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Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Tue, 20 January 2004 12:51
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Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Tue, 20 January 2004 12:56
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Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG MS-75Tue, 20 January 2004 22:51
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Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Fri, 23 January 2004 02:01
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Read Message   Re: 7mge tuning, pinging, AFR's and other crap... LONG ed_ma61Fri, 23 January 2004 05:38
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