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ADVICE ON TUNE-UP

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Old Nov 12, 2003 | 03:29 PM
  #1  
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Default ADVICE ON TUNE-UP

Tommorow I fly out for my Sister's wedding but as soon as I get back I'm starting on the engine. Tune-up and detail.


Now it has a miss. Could be anything but I believe it to be the dist. Now it has a dual points and I love the maintenace free aspect of HEI or any elec. distributer, adjust timing/ vac. advance and your done forever. Points I'm clueless on, #1 cylinder, buy a dweel metet all that horse poopie. But I do not want to buy another dist. when the points one is 2 months old. What do you guys think of those MSD conversion kits?

Pertronix new Ignitor II conversion systems have all of the same quality features as the original Ignitor, plus a powerful microprocessor controller to deliver three to five times more available energy between 3,000 to 5,000 rpm. They're an ideal choice for collector car restoration because they fit entirely under the distributor cap.

Will this work for a points to elec. conversion? Will it work with my Mallory coil and ballast?

Second question, timing.....owner's manual calls for 4 degrees BTDC at 700 RPM w/ vac. advance disconnected. The other end of the spectrum is 32 degrees BTDC
I have no friggin clue what kind of cam is in this thing, the original owner doens't know jack[/B] what the hell do I set it at?????????????????????
12 degrees, I don't know.


Third question. Carb is Eldebrock Model #1400, 650 mech. secondary. I no longer have my vacuum guages but rule of thumb. With car warmed up, 700 RPM, off choke, turn clockwise on either left or right bank idle circuit needle till CAR DROPS IN SPEED, STOP, then open back up 2 turns counter clockwise. Do same to other bank.
This sound about right for getting in the ballpark?

If anyone is in the San Diego area and knows points I'd be more than willing to supply you with all the :cheers: :cheers: to help me with the tune-up.
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Old Nov 12, 2003 | 03:45 PM
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Default Re: ADVICE ON TUNE-UP (Cali,68,L-79)

i got an Pertronix ignitor II on my 74 stock distributor...works great, even got an MSD 6AL hooked up with it. So YES it will work on your points to electronic conversion. as for your timing...start at 10 and go up if necessary..sounds like the motor has been rebuilt so who knows if theres a bigger cam in it or what. As for Total advance, thats where you can achieve your best tuning. Get an advance timing gun..money well spent.
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Old Nov 12, 2003 | 03:52 PM
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Default Re: ADVICE ON TUNE-UP (Cali,68,L-79)

I would stay away from the Pertronix 2 unit. It only took 3 months for mine to go out. I was stuck at a gas station, and had to get a ride back to my house to grab the original distributor guts (points). I changed everything over to points at the gas station, and finally made it home. The thing that failed on my unit was the rivots that hold the sensor from the magnetic ring. Some how the rivots got loose and the unit went out of spec. I had a friend burn one up cause he set the tolerances to close. I went back with points and stayed with them until I got the ZZ4 with the HEI.

Lars has written great papers on setting the timing and carbs. You can find them at Terry's http://www.corvettefaq.com site. Here is a link to his timing paper. If you do as he says you cannot go wrong. http://www.corvettefaq.com/c3/HowToSetTiming.doc

Right now I am waiting to get my car back so I can switch to an MSD setup including the distributor. The HEI is nice, but I want my tach drive tach to work as before.
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Old Nov 12, 2003 | 06:48 PM
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Default Re: ADVICE ON TUNE-UP (Cali,68,L-79)

I suggest the Mallory Unilite conversion kit. Summit has them for $99.95. I installed one on my old 72 Malibu back in the eighties, worked flawlessy, never had a bit of trouble with it. Moved it to a 71 Malibu that replaced the 72, and it was still working fine, when I finally sold that car a couple of years ago.

"This kit can drive both OEM and high performance ignition coils and is designed for 1957-74 single and dual point GM Delco distributors."

Installing a Unilite conversion is one of the first things I plan to do to the new 71 vert, when it gets here.

I'd offer to bring down my dwell meter and assist you with adjusting your points, and consuming your beer, but I have to many things to do before business takes me to Chicago next week.

Mike
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Old Nov 12, 2003 | 09:22 PM
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Default Re: ADVICE ON TUNE-UP (SLine78)

I suggest the Mallory Unilite conversion kit. Summit has them for $99.95. ...
Mike
:iagree: :yesnod: That was done when PO still had it, zero problems since! Since I prefer Mallory over MSD anyway, it was a good match!
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Old Nov 12, 2003 | 09:45 PM
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Default Re: ADVICE ON TUNE-UP (73sbvert)

I have been running a Mallory mechanical tach drive now for about 9 months with zero problems.





[Modified by 74 vert, 8:47 PM 11/12/2003]
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Old Nov 12, 2003 | 10:46 PM
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Default Re: ADVICE ON TUNE-UP (74 vert)

Alright how about this one?


Convert to a more accurate spark.
GM: 1957-74, single and dual point GM Delco distributors, Unilite breakerless ignition conversion kit
Convert your OEM style breaker points and condenser to the more reliable Unilite ignition from Mallory. This self-contained unit has no moving parts to wear out, so it provides many years of trouble free service. Simply replace the stock points with the Unilite module which consists of a photo coupler, signal processor, and power switch. Each time the shutter wheel stops the infrared light from reaching the photo coupler, the electronic circuitry energizes the ignition coil. When the shutter wheel allows the light to reach the photo coupler, the stored energy in the coil discharges. This kit can drive both OEM and high performance ignition coils and is designed for 1957-74 single and dual point GM Delco distributors.

Sold as a kit.



[Modified by Cali,68,L-79, 9:48 PM 11/12/2003]
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