1964 PCV valve location

[Jeff B.]

Re: 1964 PCV valve location

Timothy,
Well we are off the initial subject a bit, but the different crimps in the exhaut manifold tube for the choke circuit is very interesting. In preparing my 64 300HP for the PV I found it a bit challenging to get the idle down to 600 RPM. The carb was fully rebuilt and rebushed during the restoration but I still had to play with things quite a bit before I could get there. I thought a lot about the size of the hole in the (aftermarket) PCV restrictor but did not give much thought to the choke circuit since I was using the factory mainifolds. Now I'm going to have to take a look at that! You never know what's going to come out of these threads, thats what makes them fun.

[Michael H.]

Re: 1964 PCV valve location

And for those interested, look at the picture of an early 64 with a 7017375R FI unit on page 279 of the Noland Adams book.

Other than some misc 64 items, the engine looks just about exactly like a 63, including the vacuum advance system.

[Stuart F.]

Re: 1964 PCV valve location

Michael;

Have not gotten to Saint Cloud as yet for the non-ethanol fill up. The road (Narcoossee) is still under construction between me and them. Truth is I haven't had the Vette out in a while. What with the heat and all, my best time for a run is Sunday am's, and the're not open then.

Still waiting on parts for my 3461S that I'm setting up for the good gas too.

Tim;

My 3461S has the holes under the air valve too.

Stu Fox

[Duke W.]

Re: 1964 PCV valve location

And for those interested, look at the picture of an early 64 with a 7017375R FI unit on page 279 of the Noland Adams book.

Other than some misc 64 items, the engine looks just about exactly like a 63, including the vacuum advance system.

I believe these early '64s with the 375R unit also used '63 distributors. The early L-76s may have also used '63 distributors.

Does anyone know the difference between a 375 and 375R. Was it just different specs for the power/economy stops?

Duke

[Michael H.]

Re: 1964 PCV valve location

I believe these early '64s with the 375R unit also used '63 distributors. The early L-76s may have also used '63 distributors.

Does anyone know the difference between a 375 and 375R. Was it just different specs for the power/economy stops?

Duke

Duke,

I don't remember for sure on the distributor/vacuum advance but I thought they had a new part number to be used with the 375R. I'll look.

Yes, the lean/rich stop settings changed because of the new 346 cam for 64. There may have been a change for the enrichment diaphragm spring too but I don't remember. I think everything else was the same as 375.

[Timothy B.]

Re: 1964 PCV valve location

Jeff, Michael and Stu,

I can report my experence with the choke hot air restriction in that holding my finger over the clean air tube the motor slows further than blocking the pcv valve.

I am sorry I changed the subject of this post..

[Michael H.]

Re: 1964 PCV valve location

I believe these early '64s with the 375R unit also used '63 distributors. The early L-76s may have also used '63 distributors.

Does anyone know the difference between a 375 and 375R. Was it just different specs for the power/economy stops?

Duke

Duke,

We may need some assistance from someone that has a 1964 printing of the parts book.

I looked at a 1966 printing but I didn't learn much. I think most of the unique items for a 7017375R FI unit were removed/replaced prior to 1966.

I think the vacuum advance unit for a 7017375R is a 236 though, the same as that used for all 7017380 FI's.

I have to wonder what the part numbers are for the advance weights and springs and the entire distributor assembly. Is the distributor an 1111064 ??