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Old 01-30-2011, 11:29 AM   #43
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i am just getting old.lol

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John & Colleen Weston & Cassie(our cat) -Olympia,WA
1978 GMC Midas Class A 30FT-454 Engine, 400 T
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Old 01-30-2011, 08:59 PM   #44
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rdy, see if you can put a heat shield on that starter. they like to go out alot from what i am told. mine was shot with only 4,500 mis on it and the dealer put in a new one for us. i have to do the same thing.

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Old 01-30-2011, 10:20 PM   #45
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outlaw. i put a shield on the starter, don't want to change that out again soon. I also added an inline electric fuel pump, i had problems with vapor lock in the heat of the summer and read somewhere, i think on this forum, that the in line electric would help, you just need to add a oil pressure activated switch so the pump only runs when the engine is running,
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Old 01-31-2011, 12:34 AM   #46
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Originally Posted by JimElliott View Post
The engine temp will rise as the need for increased timing comes into play....I would checkout the timing at various engine RPMs from idle to 3,000 RMs.

Jim
jim, i thought that name sounded familar, last year i read a thread you had going with "olvet" ,all 17 pages, about temps and so on, i have done the stuff with the fan, the t-stat and closed most of the ways air can bypass the rad but never got to the timing thing.

anyway, thanks for all the great advice.
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Old 01-31-2011, 10:19 AM   #47
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Originally Posted by rdy2trvl View Post
outlaw. i put a shield on the starter, don't want to change that out again soon. I also added an inline electric fuel pump, i had problems with vapor lock in the heat of the summer and read somewhere, i think on this forum, that the in line electric would help, you just need to add a oil pressure activated switch so the pump only runs when the engine is running,
RDY, That is where I got into some trouble by adding a electric fuel pump.....
People swore up & down that the "Carter street/strip" electric would allow the manual (stock) pump to draw the fuel through, Nothing but lies.....
The distance from the fuel tank inlet to the manual pump is about 27 feet and while everything is fine at speed on the flat and level once the hill climbs started it would cough & sputter until the electric was turned on.......
I would change out both filters and climb again with the same results....
Finally out of complete frustration I opened up the wallet and purchased a "Edelbrock 1722" manual fuel pump which kicks out 6 PSI and 110 GPH and the problems went away......It ain't cheap at around $100.00 but at least it ends one of the frustrations of life.

Jim
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Old 01-31-2011, 01:58 PM   #48
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As promised, Here are some "HEI" configurations and they can be found in a salvage yard.

Jim


This is a HEI mechanical timing values chart, from tests performed by Rocky Rotella, using stock HEI parts,
"with the HEI centerplate numbers facing up", and using stock GM #139 weights, w/the numbers up.

Centerplate# ========== Weight# ===== Crankshaft Degrees*
...#346================139==============24*=====
...#349================139==============20*=====
...#361================139==============24*=====
...#363================139==============15*=====
...#364================139==============18*=====
...#365================139==============06*=====
...#368================139==============20*=====
...#369================139==============22*=====
...#370================139==============25*=====
...#375================139==============26*=====
...#383================105==============24*=====
...#389================139==============21*=====
...#393================139==============07*=====
...#398================139==============24*=====
...#399================139==============25*=====
...#400================139==============14*=====
...#401================139==============24*=====
...#402================139==============26*=====
...#404================139==============16*=====
...#406================139==============21*=====
...#416================139==============24*=====
...#417================139==============24*=====
...#422================139==============20*=====
...#432================139==============24*=====
...#438================139==============18*=====
...#444================139==============21*=====
...#445================139==============19*=====
...#446================139==============17*=====
...#449================139==============24*=====
...#451================139==============20*=====
...#452================139==============24*=====
...#459================139==============25*=====
...#462================139==============19*=====
...#467================139==============24*=====
...#469================139==============21*=====
...#470================139==============24*=====
...#481================139==============14*=====
...#482================139==============24*=====
...#483================139==============24*=====
...#485================139==============25*=====
...#486================139==============22*=====
...#508================139==============24*=====
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Old 01-31-2011, 08:49 PM   #49
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jim, so you are saying , find a 375 center with a 139 weight and crankshaft @ 26*. now where does the .041 weights come from? if i understand right we need to go from 11 lbs to 6 lbs in the ignition springs, is this correct? do the salvage yards have these in stock or what? thanks for all the info.

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Old 01-31-2011, 09:15 PM   #50
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jim, so you are saying , find a 375 center with a 139 weight and crankshaft @ 26*. now where does the .041 weights come from? if i understand right we need to go from 11 lbs to 6 lbs in the ignition springs, is this correct? do the salvage yards have these in stock or what? thanks for all the info.

Outlaw
Outlaw that 375 X 41 weights hands me 22 mechanical advance, The 375 X 139 will as written hands out 26......

Now if I wanted 26 I would need to cut back my base timing to 6 instead of the 10 or so base I now use.....

The "springs" are NOT measured in (LBS), Only how fast they allow the weights to open and they are a PITA to figure out so stay with the stock springs until you make a test to determine if you need lighter or heavier springs...

If you are close to the opening of the weights you can swap one spring and dial it in, Now you can see the value of dialing them in on a machine cuz it saves time and cuss words

Jim
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Old 01-31-2011, 10:03 PM   #51
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boy, i like to cuss.lol. i understand. can i find the weights from any dist. that is hei or would it be better to get em from gmc or chev dealer?

you have alot of patience with us, i thank you. i don't really work on car engines but i can work on older harly's.lol.

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Old 02-01-2011, 09:00 AM   #52
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boy, i like to cuss.lol. i understand. can i find the weights from any dist. that is hei or would it be better to get em from gmc or chev dealer?

you have alot of patience with us, i thank you. i don't really work on car engines but i can work on older harly's.lol.

Outlaw
The only weights the "Chebby" dealor has is the complete (ZZ4) distributor shaft that cost around $160.00 or a complete distributor for a dab over $300.00 but both are to dang expensive for my taste.

That is why I walk around the salvage yards digging into everything that is "Chebby", Even some old points distributors have the correct stuff in them but to be sure measure the 2 pins that hold the center in place.

The fun of owning older equipment never ends

Jim
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Old 02-01-2011, 10:50 AM   #53
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You should be able to get weights etc, from most auto parts stores. The GM dealership would be the last place to go.
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Old 02-01-2011, 03:56 PM   #54
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You should be able to get weights etc, from most auto parts stores. The GM dealership would be the last place to go.
Those weights you purchase from the auto parts store are nothing but junk, Maybe some of the springs can be used...
Save your money...

Jim
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Old 02-01-2011, 05:06 PM   #55
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As for the chassis battery going dead and your coach not having a switch to use the house batteries, how about using a pair of jumper cables (which you no doubt already have somewhere) to jump from the house battery to the chassis battery. This would be quicker than the service call and cheaper than any other fix.
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Old 02-01-2011, 05:51 PM   #56
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poptop, thst would of been a great thing, but for some reason and these are new, maybe the cold weather we had, i don't know, but i didn't have enough power to start. yep i carry cables. hopefully now that things are back to normal and working right, i won't have to worry about, but, you never no. lol.

Jim, yeah when i get time i'll hit the junk yards to fine what i need. thanks.

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