MSD Trigger Ignition

[dq409]

Well I got to boast !!
I just installed the distributor that IgnitionMan rebuilt and dialedin for me. I went with the MSD trigger style and the MSD 6AL box.
I`ve got to say this IS the best ignition I`ve ever had !!! BAR NONE !!
After I installed the box and wiring it fired so fast I didn`t even get my finger off the starter togle before she lit !!! FLAWLESS !!! And this was an bone cold engine that sat for six to eight weeks !!
I`m impressed in the workmanship that Dave does. The distributor impressed everyone who saw it BEFORE it was installed.
Multispark is the ONLY way to go.
If you want to keep the stock look just put the MSD box under the dash or other hidden spot. ME? OUT in the open baby !!,,,dq

PS: Dave, It`s great to do business with someone who prides his workmanship! Thanks Again!!,,dq

[dq409]

And one more thing to add,,,,

With the MSD 6AL you get the rev limiter. I just had to try it since before the install I had that high RPM falloff at the mid 5K.
I hit the 6400 rev limit and it works !!!
Pretty cheep insurance !!,,,dq



don`t ask about the rag,,,,

[wrench]

I wish mine would fireup! It still sits, waiting for that loving touch.

Someday, someday.....


BTW, love that oil filler cap filter system! A red rag would have matched better! :p

:cool:

[IgnitionMan]

I'm concerned...how'd my "universal red" paint match yours??

I have a tendency to do everything like it will go into one of my own vehicles/engines, so...it's got to be right.

That thaaing sure ere purty!!

[dq409]

YEP Dave ,,Matched perfictly !!!

And Wrench,,,I would have used a red rag but I only have green !! LOL :cuss

[IgnitionMan]

That engine should have a road draft tube area someplace on the block, if I remember correctly. Maybe back of the block, next to tyhe dist, like early small blocks.

If so, the whole thing could be PCV valve'd fairly easily. That'd help with any oil throwoff up the filler tube.

[TomO]

dq409-Great to hear that you have also solved you miss at higher rpm. It sure seem like the ignition was causing us both problmes!!! I have been looking into the crank trigger set up as part of my furture 409 plans. Iman knows his stuff. The advice that he has given has really helped my car in both driveabilty and at the track.
Tom

[dq409]

Dave,, I am running the PVC set-up now. Just trying to figure out this goofy oil thing. Ready to do a leak down test to see if that shows anything,,,,Ideas?,,,,,dq

[IgnitionMan]

HMMM, not really.

You won't find one of these tools available, and it would be after the fact on this engine, but I built/use a blowby meter.

Graduated plastic cylinder mounted on a wood pedistal (like a manometer, top end open to atmosphere), marked in one half inch increments, ping-pong ball inside, tube off the bottom.

Connect the tubing to the PCV valve fitting on the engine/valve cover, seal all other orifaces to the engine windage area (oil filler, dipstick), run engine and record how high the ball goes in the tube. Every tune-up, record the new level. This will give you an idea of the ring sealing for the oil control and second compression ring scraper condition. This test should be done with a leakdown and compression test, the trio, I call it.

Say, just how much pressure is in the crankcase of that thing? Could be one of either these, second rings are up-side-down on the pistons, and/or the PCV valve spring loading is too light? Can you feel excessive pressure at the oil fill tube?

[TomO]

Ignitionman - I see that B&B makes a guage that measures engine blow-by, which is kinda pricey. It is the volume of blow-by and not the amount of pressure that it produces-OK-OK I got it.
TomO

[dq409]

IgnitionMan or anyone else, I need a lesson on the PCV theory. I thought that the valve it self was just a oneway valve.
If you ran a hose from the back of the carb to the PCV hookup port with out the valve ,,,what would happen? How does the valve itself funtion?
If you are just using a road draft tube does it just spew oil and pressure out under the car?
I do think I know the theory of how the PCV system works,,,,buy pulling air out (through the PCV valve) with manifold vacuum you lower the crankcase pressure. You do need a vent for air intake (breather tube at the oil fill tube or valve cover vents).,,,dq

[CDNpontiac409guy]

DQ, the PCV is effective during situations where the crankcase pressure exceeds the intake manifold pressure ( vacuum ) by a set amount. The pressure from the crankcase must overcome the resistance in the check valve in the PCV system.

A PCV alone is not adequate ventilation for the engine. Under full throttle, when the manifold pressure ( vacuum ) is near atmosphere, the crankcase will have greater pressure. This is where you see the "closed" PCV systems where the 2nd "vent" from the crankcase will be a larger diameter tube or hose that will vent into the closed air cleaner.

I have been trying to determine what could be causing this excessive pressure in your crankcase. the clearances are standard high performance values. The rings are what are accepted as the best street performance ring that are available... Speed Pro Plasma Moly. And no, they're not upsidedown !

[IgnitionMan]

Next time you go to the auto parts store and have the entire PCV section all to yourself, take a gander up the engine end of a few valves.

Different numbers/letters, combos on the plates inside the valves. What does it all mean? Loading, to match cam/vacuum, engine parameters, etc. Different valve "weighting" for different engine parameters, on-off levels, etc.

Sometimes, the hose draw volume needs to be restricted as well.

As far as the blowby meter goes, some of each, volume/pressure. I like to make my own tools whenever possible, like rod bolt stretch meters, block deck square readers, all kinds of stuff.

[dq409]

CPG,, Thanks and I KNOW that the rings are in right !! I guess I`ll check the PVC system and see what can be done.


HEY I JUST THOUGHT OF IT !!!! If the PCV valve is installed horizontal would that cause the ball valve to stay shut and not allow the crankcase to vent !! O PLEASE O PLEASE !!! Could this be it ?????? It just poped into my head as i wrote the first line !! ,,,dq

[dq409]

CPG,,,I know you`re in here,,,,,,,,,can`t hide anymore !!!!

[dq409]

Never mind,,,,,,,,,,,,,,,,dq

[IgnitionMan]

Certain year's Chevelle engines used a PCV valve that was "hose fed" on each end and was mounted horizontally. If the loading is correct, the valve should work no matter the way it sits.