64 stalled at 50 MPH??

[Edward J.]

Re: 64 stalled at 50 MPH??

Tim, pull the bolt out and put your finger under to hold the rod, then have someone bump the key to get the push rod up as far as you can. then reinstall bolt to hold rod, then install pump, start the bolts on pump then alternate to each bolt after tightening a couple of turns.

[Tim D.]

[Tim D.]

[Duke W.]

Re: 64 stalled at 50 MPH??

It's simply a matter of verifying that the spark advance map meets the specs in the shop manual. The VAC should be a 236 16 or a B28, and of course, it has to meet spec and be attached to to a full time manifold vacuum source.

Google my name San Diego and Corvette and download the pdf of the power point presentation. The nice thing about a 327-365/375 is that if the spark advance map meets OE specs, there nothing more to do other than setting initial timing to about 14, because the centrifugal and vacuum advance curves are perfect.

Total idle advance at 900 should be about 30-32
Total cruise advance about 54
Total WOT advance about 38

Duke

[Tim D.]

[Stuart F.]

Re: 64 stalled at 50 MPH??

Tim;

This is a far out notion, but whenever I hear about multiple fuel pump failures together with a recent engine rebuild I think cracked block allowing coolant contamination of the engine oil. If you find a greasy substance in the cavity of the fuel pump arm, and possibly a broken pump arm spring which will cause irratic pump operation, you might also find the cause to be coolant contamination. Check also under a valve cover for any sign of a greasy substance.

Was the engine over bored? Any other machining that could have cracked the block or perhaps a misapplied head or intake manifold gasket?

It's a far out possibility, but that's just a little tid bit from my experience of over 50 years.

Stu Fox

[Tim D.]

Re: 64 stalled at 50 MPH??

Hi Stu,

As far as I'm concerned, nothing is too far out of a notion..I always appreciate any thoughts "out of the box" thoughts included. I don't think coolant contamination of engine oil occurred. I did not see any evidence of a greasy substance anywhere. I also changed my oil and oil filter before starting the engine with the new fuel pump just to be safe. I did not see anything abnormal in the old oil or the old fuel pump or fuel pump cavity. The arm spring is not broken.

I'm really hoping to zero in on the timing and vacuum advance issue, especially since my vac can is buried against my aluminum high rise intake manifold. I know this can't be correct. I remember having difficulty installing the distributor and thinking I was one tooth off and reinstalling it several times to get the new engine to run right and time right etc. but it has been a couple of years since I first fired the engine. It runs really good but gets VERY hot at idle and stop and go/slow speeds. Cools right back down to 180* once I'm moving with air flow.

Thanks,
Tim

[Gary R.]

Re: 64 stalled at 50 MPH??

Hi Tim..................Just read this post and I'm glad you are back on the road. Been a while since we last spoke and I hope otherwise all is well with you and the family.PS I used your sheared pinion for my Carlisle seminar this week. People really were amazed to see a pinion gear broken in 1/2, I had it next to the 3.5" 1/2 Shaft with sheared inner/outer spicer solids!

[Tim D.]

[Jim T.]

Re: 64 stalled at 50 MPH??

Time have you bought a vacuum gauge and learned how to use it? The vacuum gauge will tell you if the vacuum to your distributor advance can is getting full time or ported vacuum from your carb. Did you take your distributor apart for repairs or maintenance

[Tim D.]

Re: 64 stalled at 50 MPH??

Jim,

I have not done any of what you mentioned but it looks like that is the direction I am heading. I am currently trying to educate myself in order to perform all of the vacuum advance, timing and distributor tests and fine tuning. The distributor was supposedly rebuilt by one of the catalog company pros when I bought it but that doesn't always mean it was done properly. I am reading archives and other posts trying to learn how to go through the system from start to finish including making sure the distributor is not one tooth off etc.

Thanks,
Tim

[Chris D.]

Re: 64 stalled at 50 MPH??

Tim,
Regarding timing, you listed a big problem along with its solution. Since the vac can is hitting the manifold you can't get the proper initial timing set. As you suspected, the solution is to properly index the distributor drive gear. All the insights into mechanical and vacuum maps presume you are set to the design tune up spec for initial advance.

Chris

[Tim D.]

Re: 64 stalled at 50 MPH??

Chris,

Thank you very much for confirming my thoughts. I am a novice but bound and determined to educate myself and get this thing right. The car is too nice to be dealing with this hot idle, timing, vacuum advance issue. I am studying and gathering the knowledge and tools to get to the bottom of this. I have a Craftsman inductive timing light, but wonder if I need an inductive advance timing light instead??? I also have a dwell/tach/voltmeter. I think I need to buy a Handy Vac vacuum gauge???

Tim

[Joe R.]

Re: 64 stalled at 50 MPH??

Hi Tim,

I think you mean a Mighty-Vac. Is your timing light a dial back type?

Joe

[Tim D.]