393w HIGH PERFORMANCE TIMING HELP NEEDED
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3rd Gear
Joined: May 2022
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From: Madisonville tn
393w HIGH PERFORMANCE TIMING HELP NEEDED
I have a 92 351w block bored 0.040 it has a 3.850 scat crank eagle I beam rods KB Hyper 22cc dish pistons 0.039 felpro head gaskets. Piston is 0.010 in the hole. Windsor sr 200cc runner heads 64cc chambers 202 160 valves scorpion 1:6 roller rockers comp xr282 hyd roller cam lunati link bar lifters 1 5/8 JBA long tubes msd big cap mech adv distributor msd 6a cd box msd blaster 2 coil air gap edlebrock intake edelbrock 650 avs2 carb with 1/2in heat spacer gasket (i know its not needed it was all I had) engine also has cvf racing 8 rib serpentine with high flow electric water pump. Has a 5 speed trans my question is : is initial timing of 17* -18* with black bushing which gives a total of 36* acceptable. The only advance springs i have are the middle weight ones and don't really start advancing until 16-2000 seem to be all in about 3200 will that work or should I have a wider faster curve
Hotshot
Joined: Jul 2020
Posts: 10,349
Likes: 2,588
From: Near Salt Lake City
MSD big cap mechanical I read
Not to badmouth MSD but my leetle Duraspark with vacuum advance allows my boss to spin to 8k no problem
I would switch to one of those for just a moment and see how it runs
IMO you need both mechanical and vacuum advance and some sort of electronic timing control
All in at 2k sounds normal and reasonable
You could play with adding more removing the bushing etc.
All would not be as streetable and run as well as a Duraspark IMO
Good luck
Not to badmouth MSD but my leetle Duraspark with vacuum advance allows my boss to spin to 8k no problem
I would switch to one of those for just a moment and see how it runs
IMO you need both mechanical and vacuum advance and some sort of electronic timing control
All in at 2k sounds normal and reasonable
You could play with adding more removing the bushing etc.
All would not be as streetable and run as well as a Duraspark IMO
Good luck
Thread Starter
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3rd Gear
Joined: May 2022
Posts: 3
Likes: 0
From: Madisonville tn
MSD big cap mechanical I read
Not to badmouth MSD but my leetle Duraspark with vacuum advance allows my boss to spin to 8k no problem
I would switch to one of those for just a moment and see how it runs
IMO you need both mechanical and vacuum advance and some sort of electronic timing control
All in at 2k sounds normal and reasonable
You could play with adding more removing the bushing etc.
All would not be as streetable and run as well as a Duraspark IMO
Good luck
Not to badmouth MSD but my leetle Duraspark with vacuum advance allows my boss to spin to 8k no problem
I would switch to one of those for just a moment and see how it runs
IMO you need both mechanical and vacuum advance and some sort of electronic timing control
All in at 2k sounds normal and reasonable
You could play with adding more removing the bushing etc.
All would not be as streetable and run as well as a Duraspark IMO
Good luck
thanks for your time
Hotshot
Joined: Jul 2020
Posts: 10,349
Likes: 2,588
From: Near Salt Lake City
Sounds like a neat setup
I should build one like it or something similar for me to play with
My 69 came to me with 2.73
If it runs like a raped ape you mighty need a crank evac system (I put 2 pcv valves in a hot 289 I built)(one in each valve cover)
That is if it is pushing the oil pan gasket out of place
I should build one like it or something similar for me to play with
My 69 came to me with 2.73
If it runs like a raped ape you mighty need a crank evac system (I put 2 pcv valves in a hot 289 I built)(one in each valve cover)
That is if it is pushing the oil pan gasket out of place
Cargo Master
Joined: Oct 2020
Posts: 2,652
Likes: 776
36 is probably more than it needs. I'd be surprised if it needed more than 33 degrees total to run its best. Most of the time on an MSD distributor I end up using the black bushing with either 2 light blue or 1 light blue with one of the weak plain springs.
Lead Driver
Joined: Nov 2000
Posts: 6,623
Likes: 342
From: Albuquerque
Well, let me pe on the parade. I would never try turning an engine to 8,000 with a duraspark. A failure at that speed could spell disaster.The Durasparks are notoriously flakey. There have been tons of post here about them. I've been running MSD stuff for years with no problems. There are some Chinese ripoffs out there to be warey of. Putting two PCV's is not a good idea, you no longer have any inlet air.
Sound like a fun engine. You might be pushing the initial timing a little depending on your altitude above sea level.
Just saying, everyone has there own opinion.
Sound like a fun engine. You might be pushing the initial timing a little depending on your altitude above sea level.
Just saying, everyone has there own opinion.
Hotshot
Joined: Jul 2020
Posts: 10,349
Likes: 2,588
From: Near Salt Lake City
Well, let me pe on the parade. I would never try turning an engine to 8,000 with a duraspark. A failure at that speed could spell disaster.The Durasparks are notoriously flakey. There have been tons of post here about them. I've been running MSD stuff for years with no problems. There are some Chinese ripoffs out there to be warey of. Putting two PCV's is not a good idea, you no longer have any inlet air.
Sound like a fun engine. You might be pushing the initial timing a little depending on your altitude above sea level.
Just saying, everyone has there own opinion.
Sound like a fun engine. You might be pushing the initial timing a little depending on your altitude above sea level.
Just saying, everyone has there own opinion.
I run a yellow module just because that is what I found at the junkyard
With a new stator and a working module the Durasparks have little to no trouble at high rpm
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