After the head replacement I have been burning about half a quart every 100-200 miles with 1 - 2 auto cross events in there. I did an evo school locally a few weeks ago about burned about 1 quart in 25 40-50 second runs. As for smoke I noticed a trail behind me this morning on the drive to work gray in color and only under heavy acceleration. at idle there is none, no smoke that I have seen at start up. unless the car has sat for a few weeks or more.
before head replacement I burned 2.5 quarts in 150 miles and 1 autox event. it was pretty bad. -Mike Chuck Wills wrote: > timing and oil burning are unrelated. the additional pressure might > make an additional 3 or 4 foot pounds of torque... which is, what, > maybe a 4% increase? That's not enough to change oil burning or ring > sealing. > > How much oil are you consuming? Do you have a grey/blue cloud > following your car? Is it worse when you let off the gas at high rpm? > > -Chuck > > ---------------------- > > Michael Knudson wrote: >> />The ECU has no way of knowing where you have physically set the >> timing. It assumes you are physically setting it to 10* and will report >> that even if you physically set it to 20*. If you set it to 14*, it's >> like adding an additional 4* over the entire timing map. The ECU >> doesn't know this, though. >> > >> >As far as ignition timing having any effect on oil consumption.... it >> doesn't. It's either coincidence or imagination. >> >I'd say stick it back at 14* and run it that way. >> > >> >Have you done a leakdown and compression check to know that the rings >> are bad? >> > >> -Chuck / >> >> @ Chuck, >> >> no leak down yet, compression comes to 160, 155, 162 , 160 (at 4100 >> feet). need to check them again now there there is a more mileage on >> the head. >> as for burning oil, I know timing its self would have nothing to do >> with it. but the increased pressure from the fuel igniting sooner would >> right? the engine has just about 154k miles on it. >> >> >> @ Larry, come to think of it, no I did not. guess thats what I get for >> being in a hurry that night... >> >> Larry Alster wrote: >> >>> Did you put the jumper in the diag block to adjust the timing? >>> >>> >>> >>> Larry >>> >>> White Knight 1991 Crystal White #99 CSP >>> Silver Bullet 1992 Silverstone #17 SM2 FM I+ Turbo >>> Honey B 1992 Sunburst Yellow #99 SM2L JR Supercharger >>> Whooosh 2004 Titanium Mazdaspeed MX-5 >>> >>> LowCountry Miata http://www.lowcountrymiataclub.net >>> Masters Miata >>> RAGS 074 >>> >>> -----Original Message----- >>> From: [EMAIL PROTECTED] >>> [mailto:[EMAIL PROTECTED] On Behalf Of Michael Knudson >>> Sent: Tuesday, June 24, 2008 4:37 PM >>> To: [email protected] >>> Subject: Adjusted timing to 14 on a 97 >>> >>> Hello, Just have a quick question for you. I adjusted the timing on my >>> 97 NA to 14 degrees. We set it using a timing light and while keeping >>> an eye on a scangauge in side the car to see what the ecu was saying it >>> is. timing light says we are at ~14 but the ecu is still reporting 10 >>> at idle. does it always report it as 10 or is there some other issue >>> that I should be worried about. >>> >>> I will say this though, since I bumped the timing it runs much smoother >>> and feels much quicker while accelerating. no more hesitation from >>> 1k-4k rpm. >>> >>> >>> I am going to drop it back off to 12 degrees on thursday. My rings seems >>> to be letting more oil past now... just can't keep up with the extra >>> pressure I guess. Hoping to have money for rebuild over the >>> winter/spring. on that note, any tips on where I should look for parts >>> and pricing on all that? head was recently replaced with a rebuilt >>> unit. so I think just a head gasket and a lower end rebuild should be >>> enough. >>> >>> >>> Thank! >>> _______________________________________________ >>> Miatapower mailing list >>> [email protected] >>> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >>> >>> >>> >>> >> _______________________________________________ >> Miatapower mailing list >> [email protected] >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >> _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
