Re: Restoring Rusty
 

Re: Restoring Rusty
 

and to add in salt to injury, check out how high my feeler gauge goes up to, ha ha, .035 man GM Gods sure have a sense of humor - had to resort to the goofy wire style one I swore I would never find a need for, lol

Re: Restoring Rusty
 

WOW! I'm sure glad you didn't step in it!!

If you haven't figured this out yet, I'm reading the entire thread from start to finish. I love it.

Re: Restoring Rusty
 

I would run through the valve adjustment again, it is acting like they are a tad too tight.

Re: Restoring Rusty
 

Spark plug gap on a HEI Chevy should be .045 as .030 was for a points system. Yes using the wrong gap will make a vehicle run like absolute crap. When I put plugs in my truck they were gapped for .030 and I could not get it to run properly no matter what.

Also doing vac gauge measurements I am pretty sure it should be on manifold vacuum not ported vacuum as should your distributors vacuum advance to get optimal performance.

Re: Restoring Rusty
 

I was just curious why the engine would overheat with the heater lines plugged,my big block is capped and it runs fine.Is your style engine have a different water gallery set up that would cause that?

Re: Restoring Rusty
 

I been looking at your photos... y'all gonna have to change that truck's name.

Re: Restoring Rusty
 

ha ha, I said that, hmmm, thank you so much and enjoy the read

Re: Restoring Rusty
 

Hi Jake, I agree about the valves needing an adjustment, not sure if they is too tight, as I am not that good at diagnosing them, but I will definitely check them today and report back

I do hear a tick and to me it sounds like one may be loose sounds like it is a comin' from the passenger side, here's the absolutely crazy thing though, it sounded exactly precisely the same before I did the top end swap/job, in other words the old heads aka the old valve train was generating the exact same tick (lets just keep that in mind as if it may turn out to be something else, something silly, like a bolt sticking out and tapping a firewall or something crazy like that)

Re: Restoring Rusty
 

interesting, we are going to try all on .040 as per the GM Performance Spec sheet, but may bump it up to .045 as you recommend if needed

it is

Re: Restoring Rusty
 

my best guess is that something is wrong, we have not truly found the source of the problem yet, I agree that it should run without the heater core, and without the bypass hose from the intake to the water pump

let me get passed this vacuum issue and then I may try a different water pump, and maybe a more than single core radiator after that, maybe go aluminium

Re: Restoring Rusty
 

ha ha, not just yet, we still have to tackle the kick panels inside the cab and pull the dash completely out to see what lurks behind it (Winter Project?)

Re: Restoring Rusty
 

I used to run .060 gap with a Jacobs Mileage Master multi spark setup on my 1985 5.0L C10. She ran nice and smooth. That or an MSD6AL is about the only aftermarket coil system I would use because it doesn't bork the stock ignition module. The mileage gains were not enough to make the price worthwhile.

Run the gaps as wide as you can get away with it lights the fuel better. .045 is a good number for stock HEI with a new Delco coil and Ignition module.

Re: Restoring Rusty
 

Re: Restoring Rusty
 

Dentist appt. !! Don't take it out on poor Rusty, he has to be worried now.

Re: Restoring Rusty
 

Can't you combine the .035 and .010 to get to your .045? That's the way I was shown by my dad when I was learning engine stuff.

Re: Restoring Rusty
 

thought about it, but they have some heavy lube on them so that probably will add thickness to it, so I just used that wire wheel one, I may pick up a proper feeler gauge set today, I like decent measuring implements when I can afford them

Re: Restoring Rusty
 

Ha, ha, Rusty is about to meet the 3 lbs sledge if he don't shape up real quick!!!

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What vacuum can are you running? That can make the engine throb like that, although that is usually on the low end of vacuum, not the high end where you are.

Re: Restoring Rusty
 

hi Rich, what can are you talking about? if the one on the dizzy than I am not using that during the test, its like setting initial timing, no vacuum advance

Re: Restoring Rusty
 

No, it's not like initial timing. You need to tune the carb with the vacuum advance hooked up. There's your problem. You are running a way-too-late spark.

Re: Restoring Rusty
 

1) Initial timing = vacuum advanced unplugged

2) Mechanical Advance = How much your distributor pulls with weights and springs

3) Total Timing = Initial + Mechanical @ 2500-3000 rpm

4) Carb tuning is 1-3 setup PLUS vacuum advance

Vacuum advance is there to help with idle and cruise and can help with MPG

Re: Restoring Rusty
 

Koogle Mooglie, lemme re test than, and get back atcha all

Re: Restoring Rusty
 

decided to do a compression test before doing a valve adjustment, it's always good to have a baseline

man I was so bummed to find out that my trusty ol' compression gauge was not working, it read 0 for the first 4 cylinders

so rented one from AutoZone for $40 bucks (which they refund you if and when you return the tool) before Pontiac Mike told me to check the Shrader valve on my old hose, and sure as sheet the cheapo tiny valve is bad, so that tells me my gauge may be good after all

Re: Restoring Rusty
 

man my cylinder pressure looks great, #1 and #2 were initially low but retested great

I always like to test twice once 1 through 8 and later on after re warming up the vehicle 8 through 1