BLACK Z

I just replaced my motor with a 350 replacment motor, and I put the timing tabs in the 2 o clock spot, but I was reading hot rod and they said that the timing tabs have not been put there since the early 70's, where is the correct spot they said it is the 12 o clock spot.

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Taylor Spiro-pro wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

Engineboy

It depends which balancer you have.

Are you using the original balancer??

If the car originally had a timing tab behind the water pump at 12 o clock and you used the original balancer on the new motor, you will not be able to time it right. (most new crate engines give you the timing cover without any tabs on it, you just use one of the tabs that goes at 2 o clock.)

Basically the balancer marks will be in the wrong spot to time it correctly.

If the engine came with a balancer and you installed the tabs at 2 o clock, then you are fine.


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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited January 10, 2001).]

ronterry

Oh man, believe me you would know if your fifty something degrees off !!!

pop pop hiss hiss...

The pointers are the best, along with timing tape on your harmonic balancer. If you have a good timing light w/advance correction, you just need that pointer to point right a mark on you balancer @ TDC.

Ron C. Terry




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'82 Trans Am
'81 Camaro Z-28
'94 Vette LT1 Coupe

daniel dekay

hey black z, i dont have an answer to your ? but i have one for u. u have a q-jet and u told me earlier that i should buy some kind of HANGERS or sumthin to improve the performance for my q-jet carb. what where the names of those things and where can i find them???

thanks

daniel

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86 camaro cpe(dont laugh)has 92z28 body kit with GTS covers, new red paint and a killer stereo. 2 amps, 8 speakers, disc changer, custom install with subs coming by the end of the summer. sawpped (or in the process of) 305lg4 for brand new 350. TES headers, flowmaster cat back, performer manifold, TCI converter, jet chip, kn with dual snorkel cleaner. and she still passed the sniffer!

"Cal Poly SLO is the shi#"

BLACK Z

I am using one of those summit balancers, and one of the those timing covers, is there more than one way to put those covers on? You are looking for a b or g hanger from edelbrock, I have both but have only used the g hanger so far, you can get these from summit, you also should get a sec of dr rods from gm.

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Taylor Spiro-pro wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

Engineboy

You can set up any SBC to time at either spot you want as long as you have the balancer and timing tabs that go together.

If you have a Summit balancer and an aftermarket tab at 2 o clock you should be fine.

The factory just quit putting the marks at 2 o clock around the early eighties I belive.

Can you set the timing or is there a specific problem you are chasing.??


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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

RB83L69

They quit using the 2 o'clock timing mark tab when they changed the PS pump bracket arrangement to where it doesn't fit any more. Basically, you have a choice: either PS, or a timing mark. And if you use a balancer bigger than 6" (I of course do), you can't use the tube at 12 o'clock anyway.

I have driven several of my cars for a total of half a million miles at least with no timing mark for this reason, and even on the cars I have that still have the mark, I bet I've got another 3/4 million miles between my wife and me without ever looking at it with a timing light. They are never ever right because the half of it on the balancer is only connected to the crank by a blob of spooge so it has moved significantly on every single balancer I've ever checked, and most balancers don't stay the same for very long so it's not even useful to try to use timing tape for any length of time. I don't even bother with them for any purpose whatsoever any more because they're so unreliable.

IMHO the timing mark tab is deadweight. Take it off, less weight, go faster. Adjust the timing to where the car runs its best and don't worry whether some random mark lines up with anything.

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"So many Mustangs, so little time..."

Engineboy

RB83L69...Are you kidding about timing or P/S.??

I have a 400 with a 8 inch balancer and power steering and I can see the timing marks VERY clearly with no problem at the 2 o clock position.

You are right about the tube though, nothing but a 6 inch balancer there.




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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

RB83L69

No I'm not kidding... I've got exactly that same combo of bal and motor, and on the 400 in my 83, the pump reservoir hits the tab when adjusted all the way in. I actually thought maybe I could get an accurate timing mark when I first put this motor in the car, so I went to the dealer and bought a balancer and mark; but then I found I had this other problem, so I gave it up.

Seems like the 79 Z28 350 I had right before this car had the same situation.

Oh well.

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"So many Mustangs, so little time..."

Engineboy

Thats wierd, I've never had a problem Hmmm....

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited January 11, 2001).]

BLACK Z

I just keep hearing diffrent things, So I just wanted to find out for sure so i know that I am timing my engine right.

BLACK Z

I am also running a 6 and 3/4 in balancer on my 350 is that ok?

Engineboy

Yes. Basically if you can time it right, its fine.

If the marks were a problem, you wouldn't even get it close.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3