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Guess I did have a leak
https://slantsix.org/forum/viewtopic.php?t=39643		 Page 1 of 1
Author:  Jopapa [ Tue Mar 30, 2010 4:13 am ]
Post subject:  Guess I did have a leak
For the longest time I would have to give my engine plenty of time to warm up (even in the summer months) so that it wouldn't quite when I shift into gear. So I remembered I had an EGR blockoff plate cut for me a while back, went to find it and slapped it on the EGR port with a new gasket. Went out to start the engine the next morning and it ran smoother than expected, along with being able to stay running when I shifted out of park. Just thought it was interesting that I had no obvious symptoms of a vacuum leak, but apparently I did have one. I retuned the carb and felt like I gained a small amount of seat-of-the-pants power from the engine too. Funny how stuff like that works out.

For those of you who don't have one yet, get a blockoff plate cut and slap it on your intake. Makes for one less possible location for a vacuum leak.
Author:  ESP47 [ Thu Apr 01, 2010 9:59 pm ]
Post subject: 
Were your vacuum readings fine before or did it just not seem bad enough to hook up a gauge?
Author:  Aggressive Ted [ Thu Apr 01, 2010 11:03 pm ]
Post subject: 
Jopapa,

Good point! Over Christmas break I installed a 1980 225 SL6 barn find while my good motor is getting some upgrades. I ordered a block off plate which came from a dealer in Wichita and installed it a few weeks ago. It was worth 1" of vacuum @ 600 rpm idle in gear with everything on.......from 15" to 16" vacuum.

I had already done a valve lash the engine still had an irregular idle which got me to thinking about installing the block off plate. Now the idle is perfect and can idle in traffic under load with out missing a beat.
Author:  EricCooper75DDS [ Sat Apr 10, 2010 3:40 am ]
Post subject:  egr block off
just curious, where can i get a block off plate?
Author:  carlherrnstein [ Sat Apr 10, 2010 6:39 am ]
Post subject: 
I made mine out of steel, the holes are 5/16'' and are 3'' on center with 5 pieces of aluminum foil for a gasket.
Author:  Aggressive Ted [ Sat Apr 10, 2010 7:56 am ]
Post subject: 
I ordered mine through our local Dodge distributorship, Tom Matson Dodge in Auburn. I got the block off and two gaskets...
Author:  Wesola78 [ Sun Apr 11, 2010 7:35 am ]
Post subject: 
Years ago, I bought one off of Ebay for about 12 bucks. Nice looking one too, but I don't know if they are still out there.
Author:  Jopapa [ Tue Apr 13, 2010 11:43 pm ]
Post subject: 
Quote:
Jopapa,

Good point! Over Christmas break I installed a 1980 225 SL6 barn find while my good motor is getting some upgrades. I ordered a block off plate which came from a dealer in Wichita and installed it a few weeks ago. It was worth 1" of vacuum @ 600 rpm idle in gear with everything on.......from 15" to 16" vacuum.

I had already done a valve lash the engine still had an irregular idle which got me to thinking about installing the block off plate. Now the idle is perfect and can idle in traffic under load with out missing a beat.
Never felt the need to hook up a gauge. I have one but never felt any real roughness during idle (even when in gear once it was warmed up), especially after converting the ignition to HEI. I kept feeling improvements with everything I did so never suspected I had a leak. Now I can mark that off as one more (little) thing done.
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