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  #1  
Old 06-09-2012, 06:29 PM
s924b s924b is offline
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Default 5462 btm question

Hello,
I am finally getting around to connecting my universal BTM to my Porsche 924 with a VIal ignition box. The turbo is currently only about 6psi, but will probably go 8-10psi this year. I still have the original Bosch distributor with vac connections to it. I wanted to double check the set up for the distributor.

Does the distributor have to be locked out, or can the vac canister remain connected?

thanks very much,

Sean
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Old 06-11-2012, 11:06 AM
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msdtech1955 msdtech1955 is offline
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you can use this with mechanical advance. but , on the vacuum advance ..( never really seen anybody you advance on a boosted application)
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Old 06-12-2012, 11:27 AM
s924b s924b is offline
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sorry maybe I said the wrong thing there - my distributor has the vac canister attached to the side - it has connections to the side of the throttle body and one to the brake booster

boosted engine with advance would not be the best case situation would it?

does that sound more correct?

Sean
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Old 06-13-2012, 06:53 AM
s924b s924b is offline
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just curious -

does the vac advance on the distributor only occur at part throttle?

would that still be ok to leave connected?

Sean
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Old 07-03-2012, 08:26 AM
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msdtech1955 msdtech1955 is offline
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depends...
you normally dont run boost and pump gas together....
because of timing and octane issues that can lead to detonation .

if you really want more control of the timing curve, i would suggest using a
programmable 6al p/n 6530

http://www.msdignition.com/product.a...019&terms=6530
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  #6  
Old 02-25-2015, 09:52 PM
zunixaani zunixaani is offline
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# 2 ( the high side)

then use all the rev limt controls on the 8973
( the dark blue and light blue wires)
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  #7  
Old 02-26-2015, 12:48 AM
Gaz64 Gaz64 is offline
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Quote:
Originally Posted by s924b View Post
sorry maybe I said the wrong thing there - my distributor has the vac canister attached to the side - it has connections to the side of the throttle body and one to the brake booster

boosted engine with advance would not be the best case situation would it?

does that sound more correct?

Sean
Sounds like one is manifold vacuum advance (brake booster) and one is pressure retard (throttle body).

Non-adjustable though, so you would do better with programmable retard like a 6530.
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Old 02-26-2015, 09:21 AM
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msdtech1955 msdtech1955 is offline
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Quote:
Originally Posted by zunixaani View Post
# 2 ( the high side)

then use all the rev limt controls on the 8973
( the dark blue and light blue wires)
are you talking about a 7al with an 8973?
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