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  breakthrough in timing today but i still need some help?

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Author Topic:   breakthrough in timing today but i still need some help?
gingerbreadman
Journeyman

Posts: 3
From: kamloops b.c. canada
Registered: Apr 2002

posted 04-02-2002 09:02 PM     Click Here to See the Profile for gingerbreadman   Click Here to Email gingerbreadman     Edit/Delete Message   Reply w/Quote
well After work today i went up to a area that is paved and there are very few houses.. i did a pass and the usuall it pulled nicely but the same as always.. so i got out got my trusty wrench and loosend my distributer.(got shooked by my coil) so i decided to turn it off and lossen it. fired it back up and adjusted my distributer untill it didnt idel as nice.. i then tightned it back up. put a slight load on it and didnt hear any pings. so i lined my car up and........

well this was the breakthrough..... i nailed it my slicks smoked for 20 feet i took it up to 5, hit 2nd ,tires broke loose again and then i stoped.. i then went back and hooked my vaccum advance up and tried the same thing well it just craped right out... so i disconnected it and pluged the vaccume port off and set my timing back to the way it was and drove home before the cops came..

basicly my question is what did i do?

did i advance the timing and that made that huge of a differnece?

why did it run better at higher rpms but ideal bad when i adjusted it? (can i compinsate for this)??

why did my vaccume advance mess everything up like it did?

what exactly does the vaccume advance do?

do i need to run the vaccume advance (the p.o. never did)

I think i have untaped power hiding in that circular thing with the black wires in the front of my engine.. and i would like to harness that power


I know i have posted several times on tuning my engine but i feel its not something you get told once and your a pro at.. i also am worried ill do something wrong and break something..


please enlighten me on this.....

thanks

-gbm-

------------------
drive it like its stolen!!!!

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steve'66
Gearhead

Posts: 3670
From: Sonoma,CA,USA
Registered: Mar 2000

posted 04-02-2002 10:34 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
GBM,

Welcome to M&M, as far as your question I think you've found the timing that your engine likes! Vacumm advance is for daily driven street cars. What car do you have?

SteveW

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gingerbreadman
Journeyman

Posts: 3
From: kamloops b.c. canada
Registered: Apr 2002

posted 04-02-2002 10:47 PM     Click Here to See the Profile for gingerbreadman   Click Here to Email gingerbreadman     Edit/Delete Message   Reply w/Quote
oh im sorry.. i was thinking i was posting on stangnet still where everyone knows what my car is...

its a 70 coupe
351w (lots of goddies) (torker2 intake, gt 40 heads, headers, roller rockers, solid lift cam, etcc etc.)
3000 stall c6
4:11 spooled 9 inch

bassicly a straight line runner

So my vaccume advance dosent need to be hooked up at all? If i do hook it up should it be direct manifold vaccume or a port on the carb

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chips67
Gearhead

Posts: 542
From: louisville, ky, usa
Registered: Jul 2001

posted 04-02-2002 10:49 PM     Click Here to See the Profile for chips67   Click Here to Email chips67     Edit/Delete Message   Reply w/Quote
most cars ive played with run hotter temps with more timing, and the idle increases as timing is advanced and drops as its retarded. ive set up cars with the vac. advance plugged off, no big deal. the best timing is the kind that comes in early as you can get in without pinging, as much as it can take without pinging under load. test with the grade of gas you always use and the engine hot. if you launch at or above the point where you get total timing in the rpms then forget initial and the curve and just get your best power/et with total timing. if after you find whats best the car is hard to start, get a timing retard device or pull the distributor and modify it internally. if you have any really hard questions, ask anybody but me. good luck.

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67 coupe, 650dp and rpm intake on 5.0 with afr 165 heads, 4 speed, 4.11's.....best so far is [email protected] in 1/8 mile with 1.79 60ft. time.

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steve'66
Gearhead

Posts: 3670
From: Sonoma,CA,USA
Registered: Mar 2000

posted 04-02-2002 10:52 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Chip nailed it!

Throw away that vac advance hose and time it at 38 degrees total! Your stang will thank you in the morning!


SteveW

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