Yes you can advance timing as your 95 TBI engine allows you to but you
also need to use more than 87 octane fuel too. Prior to the TBI engine
and its knocik control system, GM limited CR to 8.5 or less to limit
knock potentail with 87 octane fuel. With the birth of the TBI motor,
CR was raised above 9 to 1 and knock control was used to keep
consumers happy with 87 octane still but using 87 octane limits
potentail of engine because when you retard spark, you retard power
and MPG. You can try setting timing to about 6 to 8 degrees BTDC and
using 89 or better octane fuel and you will feel a real differnce (I
would suggest 91 or better towing) but if you want to advance timing
and still use 87 octane you are wasting your efforts. Stock timing is
around TDC and it is set that way together with knock sensor to help
tolerate 87 octane fuel. BTW, to det timeing, you will need a timing
light and you will need to disconnect a connector on firewall that
disable electronic advance and a distributor wrench to lossen
distributor as the bolt holding it can be a pill to get too with a
normal wrench. Furthermore on the trailer package, all is not as it
seems as some do not come with the best posible axle ratio but there
will be option codes in glovebox that will say something like GU6, GT4
or GT5 which translates to a 3.42, 3.73 or 4.10 axle ratio in that
order. A GU6 is a poor towing ratio of any serious weight and a GT4 is
better and a GT5 is the best. BTW, I have a 89 4x4 V1500 burb with
that 350 TBI engine that I bought new and it is still pretty cherry
and has over 180K mile on it from towing and traveling cross country
and I have feed it 93 octane for many years and it runs really well
and it get surprizing good MPG too.
and you are the turd he shit.
You wrote on Wed, 03 Oct 2007 11:36:09 -0400:
s> The snoman is the shit!
With best regards, firstname.lastname@example.org. E-mail: email@example.com
Take it easy guys. He just appeared this September and has no idea of
Snoballs crap. Do a little educating prior to flaming please...
Tony the links below may bring you up to speed.
SBJ: Dumb brake question
SBJ: Front wheel bearings-2000 Blazer??
SBJ: Snoball Defense System v1.01
The connector should be on drivers side firewal it will be a single
wire in a inline connector that has a blue green rubber gasket seal
between connector halfs. The bolt at the base of distributor on intake
manifold and on passanger side just a lttle ahead of the distributor
on center line from left to right. Turning the distributor CCW will
advance timing but you need to do it with a timing light. The timing
marks are veiwed from front top drivers side of engine on damper
behind crank pulley.
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