engine swap - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 6 (permalink) Old Apr 15th, 01, 08:36 AM Thread Starter
 
Join Date: Apr 2001
Location: prince george B.C. Canada
Posts: 13
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I am currantly running 396 with single plane
torquer manifold. The problem is that I
sometimes run out of vacuum for power disc
brakes. When I was running a performer
dual-plane manifold I never had this problem.
I noticed the vacuum fitting on the manifold
is 1/4 pipe and the dual-plane was 3/8 pipe.
Should I drill and retap to bigger size
and can a person do this without taking off
manifold.
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post #2 of 6 (permalink) Old Apr 15th, 01, 01:23 PM
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Join Date: Feb 2001
Location: Concord Cal. USA
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That is not the problem. the problem is that the single plane manifold makes less vacuum at idle. I don't know how much cam you are running but it must be a bunch the torquer has very small runners and usually is not that much different than a duel plain when it comes to manifold vacuum. Does the car need to be fiddled with to make the engine combination work better.

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post #3 of 6 (permalink) Old Apr 15th, 01, 01:33 PM Thread Starter
 
Join Date: Apr 2001
Location: prince george B.C. Canada
Posts: 13
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<BLOCKQUOTE>quote:</font><HR>Originally posted by oger:
That is not the problem. the problem is that the single plane manifold makes less vacuum at idle. I don't know how much cam you are running but it must be a bunch the torquer has very small runners and usually is not that much different than a duel plain when it comes to manifold vacuum. Does the car need to be fiddled with to make the engine combination work better.

<HR></BLOCKQUOTE>
Thanks for the reply. The cam I'm running is a sig erson hyd with .535/.535 286/286.I also put on closed chamber high comp heads with bigger valves (2.19 intake and 1.88 exhaust) Could this also be a contributing factor? If I replaced single plane with dual plane would it solve this problem?
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post #4 of 6 (permalink) Old Apr 15th, 01, 08:03 PM
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Joe
 
Join Date: Jan 2001
Location: Benicia CA
Posts: 1,294
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I installed a vacuum reservoir on my 69 396 and it took care of the brake issue. Cost $30.

Joe

------------------
69 396 w/SS Trim
[email protected]
69 Pics http://albums.photopoint.com/j/Album...559&a=11674961
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post #5 of 6 (permalink) Old Apr 16th, 01, 06:50 AM Thread Starter
 
Join Date: Apr 2001
Location: prince george B.C. Canada
Posts: 13
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<BLOCKQUOTE>quote:</font><HR>Originally posted by Joe G:
I installed a vacuum reservoir on my 69 396 and it took care of the brake issue. Cost $30.

Joe

<HR></BLOCKQUOTE>
Hi, I just saw your pics and couldn't tell from engine pic where the vacuum canister was
Where is the best place to install one or is that it besides the msd ignition on the passenger side firewall? Also I noticed you have a cowl hood. I was just wondering how high of an intake one could use with that hood. Is that a Victor Jr? Am thinking of going to a cowl hood?

P.S. Nice Car

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post #6 of 6 (permalink) Old Apr 22nd, 01, 07:50 PM
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Joe
 
Join Date: Jan 2001
Location: Benicia CA
Posts: 1,294
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Thanks, Lost.
My vacuum reservoir is mounted to the radiator support, in between the radiator and horn relay.

I have an Edelbrock Performer intake, Holley 750 DP with ~ 3/4" spacer and drop snout 3" air cleaner.

I have ~1/2" between hood and air cleaner nut. Not a wing nut!

Joe

------------------
69 396 w/SS Trim
[email protected]
69 Pics http://albums.photopoint.com/j/Album...559&a=11674961
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