toosloz

i was playing with the timing....advanced it to 14 degrees atdc...so about 11 degrees with the 3 degree advance on the gear drive...

i took it on a run....damn....pulled hard and smooth all the way up to 6000...i could have kept on but i dont wanna over rev it and blow the damn thing up

now i just need to change the intake and the carb to a 750 and headers and she will be mean as hell...

can't wait!!


------------------
84z28HO
355
open element/k&n
m5/hurst billet plus shifter
83 z28 fiberglass hood
10bolt w/3:42posi
gm aluminum driveshaft
performer intake
performer 600cfm carb
accel 8mm wires
adjustable thermostat switch
160 stat
gta rims
gts blackouts
s.s rear control arms
s.s panhard rod
s.s subframe connectors
98 camaro rear springs,shocks
98 z28 leather seats
95 camaro rear view mirror
"wonderbar"
4th gen z28 tips
14.3@95mph
http://www.geocities.com/toosloz/84camaroz28.html

ViciousZ

iTrader: (1)

???
Hmmm. 14* atdc would be retarding it. Like 20* retarded. The stock setting is 6* btdc. If you really advanced it to 14* btdc I'm surprised you're not getting spark knock. And as for your gear drive and 3*, that's valve timing, not ignition timing. They're two completely different things. Not trying to flame ya here, but what you said just don't sound right.

------------------
91 Z28
Come see The Vicious...

toosloz

hmmm....maybe you're right...i was told the cam was advanced 3 degrees...so that wouldn't do squat with ignition timing?

ok...if you are right on this...then its loving 11 degrees...

someone explain this to me the right way....dont wanna be sounding like a retard...lol

------------------
84z28HO
355
open element/k&n
m5/hurst billet plus shifter
83 z28 fiberglass hood
10bolt w/3:42posi
gm aluminum driveshaft
performer intake
performer 600cfm carb
accel 8mm wires
adjustable thermostat switch
160 stat
gta rims
gts blackouts
s.s rear control arms
s.s panhard rod
s.s subframe connectors
98 camaro rear springs,shocks
98 z28 leather seats
95 camaro rear view mirror
"wonderbar"
4th gen z28 tips
14.3@95mph
http://www.geocities.com/toosloz/84camaroz28.html

tpi_roc

Spark timing:

BTDC = Before top dead center
ATDC = After top dead center

To advance your timing you make it spark more BTDC than it was

To retard your timing you make it spark more ATDC than it was

This is all the timing for your spark plug, usually power is made ADVANCING timing, however it can make you knock which will loose power and eventually blow up your engine.

Cam timing however is valve related, I'm not as well versed on it but common sense says an advanced cam will open your intake valve a little sooner, however it will close your exhaust valve sooner too so its just basically moving your RPM range around, which can be valuable in 'advanced' tuning of your engine.

The two aren't related physically, its two different "timing" beasts

toosloz

i know all about the ignition timing....i guess i was just going on what the person who installed the motor for me was saying..

now the valve timing....
i have no idea about

------------------
84z28HO
355
open element/k&n
m5/hurst billet plus shifter
83 z28 fiberglass hood
10bolt w/3:42posi
gm aluminum driveshaft
performer intake
performer 600cfm carb
accel 8mm wires
adjustable thermostat switch
160 stat
gta rims
gts blackouts
s.s rear control arms
s.s panhard rod
s.s subframe connectors
98 camaro rear springs,shocks
98 z28 leather seats
95 camaro rear view mirror
"wonderbar"
4th gen z28 tips
14.3@95mph
http://www.geocities.com/toosloz/84camaroz28.html

8Mike9

Just one correction to BTDC and ATDC from the above post...ATDC is not After where it "was", but after "0" or TDC of the piston.

BTDC is before TDC("0" degrees).

The what tpi_roc explanation was really saying is more advanced and more retarded.

ede

you'd have the first SBC i ever saw or heard of running stong retarded. since you "know all about ignition timing" tell us the base numbers, amount of advance, vacuum and mechanical, as well as your total advance. i might want to set my cars (and truck) like your's is.

------------------
ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

Project86Iroc

Ede, Im not trying to start a war, dont take this that way, but first off that was kinda wise *** response. We can all say we know "all" about something, meaning a general understanding that doesnt require further explanation for this purpose. Second, No where in his sig did it state vacuum advance HEI, and the stock 84 had the feedback distributor with no vacuum provision, so his "vacuum" # would be non existant. Again, white flag, respond how you will, but just burns me a bit to see a moderator respond so sharply to a statement like that. Mike

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I would love to be there when those Muslim Bastards hit the Pearly Gates and realize they were wrong...

SSC

Toosloz, Dont worry about a timing light or what your car is running ATDC or BTDC, It will just make your head hurt, mine too . Just get a good vac guage, plug it onto the vac port on your carb or manifold and advance the distributor to max then drop it 2*. I firmly beleive that is the only way (NOW) to time your engine properly.
SSC


[This message has been edited by SSC (edited December 02, 2001).]

ViciousZ

iTrader: (1)

I'm gonna have to agree with Mike here and flame the moderator. No need to be a d*ck, ede.
About the valve timing, tpi_roc is right, it affects the rpm powerband of the engine. Advancing the valve timing (like on toosloz's engine) will increase low-speed and mid-range torque. Retarding it has the opposite effect for more top-end horsepower.

------------------
91 Z28
Come see The Vicious...

rocky383

I HAVE TO AGREE WITH MIKE AND VICIOUS. MODERATORS ARE SUPPOSED TO BE THE ONES TO CURB REMARKS LIKE THE ONE YOU MADE, EDE. FOR YOU TO MAKE A STATEMENT LIKE THAT CASTS DOUBT ON YOUR CHARACTER AND YOUR ABILITY TO EFFECTIVELY MODERATE...TO KEEP THINGS FROM GOING TO EXTREMES. THINK BEFORE YOU POST, IT MIGHT SAVE YOUR REPUTATION.

toosloz

thanks guys

when i posted that....i got the crap mixed upthe atdc and btdc and so on, and thats cuz of bad info from others

and ede.....everyone messes up....are you perfect?

so dont be a ***

we are all here to learn

------------------
84z28HO
355
open element/k&n
m5/hurst billet plus shifter
83 z28 fiberglass hood
10bolt w/3:42posi
gm aluminum driveshaft
performer intake
performer 600cfm carb
accel 8mm wires
adjustable thermostat switch
160 stat
gta rims
gts blackouts
s.s rear control arms
s.s panhard rod
s.s subframe connectors
98 camaro rear springs,shocks
98 z28 leather seats
95 camaro rear view mirror
"wonderbar"
4th gen z28 tips
14.3@95mph
http://www.geocities.com/toosloz/84camaroz28.html

toosloz

i wonder how much time i lost running the damn thing at 8degrees?.......at 11 it feels so much smoother and pulls alot harder through its powerband

------------------
84z28HO
355
open element/k&n
m5/hurst billet plus shifter
83 z28 fiberglass hood
10bolt w/3:42posi
gm aluminum driveshaft
performer intake
performer 600cfm carb
accel 8mm wires
adjustable thermostat switch
160 stat
gta rims
gts blackouts
s.s rear control arms
s.s panhard rod
s.s subframe connectors
98 camaro rear springs,shocks
98 z28 leather seats
95 camaro rear view mirror
"wonderbar"
4th gen z28 tips
14.3@95mph
http://www.geocities.com/toosloz/84camaroz28.html

rocky383

it's nice to get something where it feels good, doesn't it?

toosloz

oh yea!....just sucks it couldn't have been like this during race season

Kevin91Z

iTrader: (1)

You guys have thin skin. I didnt see anything wrong with EdE's comments.

toosloz, we dont need to see your super long sig with every post. Once per thread is enough. Thank you.


------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
318 RWHP, 419 RWTQ
13.23 @ 107.62 MPH (2.13 60')
Southern California
Member: SoCal F-Bodies
-=ICON Motorsports=-

ploegi

In this case, I have to agree with the troops, Ede's response was a bit strong.....

But, also, I do agree with Kevin, seeing the truly large sig in every post is kinda a drag, not only does this use more server space (which someone is paying for....) but makes the threads much longer than they really need to be. I am not pointing the finger specifically at toosloz, as there are other folks that do the same thing......

My $.02..........