Vacuum

L78Impala · #1 07-04-2003, 02:30 PM

A friend has a 69 302 Z. The engine is stock. He is currently getting 10 pounds of vacuum at about a grand idle. Does anyone know what the correct vacuum should be at idle?

Thanks in advance,
Bill

Chevy454 · #2 07-04-2003, 04:06 PM

Here you go:

NCGuy68 · #3 07-04-2003, 08:43 PM

Good info Rob. I'll add it to my original shop manual collection even if it is Sun Electric info.

Best engine vacuum I can get on my 68 Z is 14" even after a stock rebuild. After exhaustive troubleshooting, no vacuum leaks turned up. I simply live with it. The power brakes and ralley sport headlight covers work just fine.

L78Impala · #4 07-04-2003, 10:38 PM

WOW Rob...That is super cool. Thanks for the help. [img]/ubbthreads/images/graemlins/beers.gif[/img]

Would you happen to have one of those sheets for a 65 L78 Impala or Corvette?

Thanks,
Bill

**Mr70** · #5 07-04-2003, 10:42 PM

Billy
You can pick up those sheets at any swapmeet.
They are plentiful around here.Usually 5-10.00 a sheet,depending on the show.
I am going to be at SuperChevy Indy next week,and that vendor will be there selling 100's of them.Let me know.
Rick

68z302 · #6 07-05-2003, 12:28 AM

This is a little off topic but I notice the coil # listed on the sheet is the 293 coil which is the standard V8 coil for small & bigblock engines, except special high performance engines.
Z28 & high performance big blocks used high speed coils & I believe that '68 & '69 Z28's with flat hoods had 298 embossed coils in them. I can't recall what the '69 coil induction coil # was.
Can anyone confirm this for me? [img]/ubbthreads/images/graemlins/worship.gif[/img]
What do COPO 427's have?

Thanks [img]/ubbthreads/images/graemlins/beers.gif[/img]

Chevy454 · #7 07-05-2003, 03:19 AM

Bill:

Sorry, don't go back that far...but there are some lose ones, so I'll check and see what I got.

Boy, $5-$10 a sheet? I got a BARGAIN then! [img]/ubbthreads/images/graemlins/biggthumpup.gif[/img] I got ALL manufacturers/makes/models from '67(?) until '77, still in the original Sun add-on file cabinet, shipped from the Northwest for $130. Looks real good hanging on the side of our diagnostic machine!

L78Impala · #8 07-05-2003, 10:52 PM

Rick, Thanks for the offer. I will be heading to SC in Joliet. I will look for one there. Do you remember the sellers name?

Rob, thanks again for looking. If you come across one let me know.

Bill

Denis · #9 07-06-2003, 02:01 AM

Gee Rob, you wouldn't happeen to have one of those sheets for a 67 302 engine would you?