A 833 Transplant: Trunnion Flange to Slip Yoke Conversion
They would be....
the reasoning behind running 3.09s is to bring my rpms up at very low speeds because of the solid cam profile I am running. I dont want the car bucking while I creep thru a parking lot.
Hey man, IMO, that's the expensive way to cure bucking.
The real issue is the ignition timing; not that there is anything wrong with whatever you have, but that the pulses are so strong. The key is to soften the pressure hits.And there may be just three ways; reduce the Scr, install a fluid coupling, or retard the timing.
I use a dash-mounted, dial-back, timing box.The box has a range of 15 degrees. I set the timing with the knob near the center. That gives me a range of plus 5/minus 10 degrees. When I go on parade, I just dial the timing back as far as I need to . This is also why my initial timing is just 12 to 14 degrees. With the engine idling at 14 less 10=4*, the timing is so retarded, my 10.9Scr 367 is tame as a pussycat.
To compensate for the meager 14* initial timing, I run a two-stage timing curve that scoots the timing back on track, to 28*@2800. Then I slam the brakes on it with the second spring taking 600 more rpm to reach 32/34 by 3400rpm.
I don't recall the cost of the box, but the distributor springs came out of a smogger 318, which I had laying around.I think I ground a bunch of weight off the flyweights to delay the all-in to 3400.
BTW, this same curve allows me to run 87E10 full-time.
In any case, I already had the E-box, installed for tuning purposes, so I just left it there when I was done.
So for me it was a total of ZERO dollars invested.
Now about that 3.09
It will multiply your idle torque to an additional 16%, complete with plus 16% stronger pressure pulses........ask me how I know..... lol. The only cures for that are; more gear so the jump is used up in less distance, Or, less gear to choke it,or reduce the idle speed, or put a toe on the clutch,Or................. retard the timing. I chose the timing deal.
But,on soft ground, my 367 does not have enough torque at 5* @550 rpm to pull itself, so I have to put some toe on the pedal anyway. Your stroker I bet, will not have that issue,lol.
But why 550rpm? Cuz with 3.55s in the back, this makes 4 mph just possible, which you might know, is a fast walk for a fit person.
Parting shot;
Plus it's really cool to control your idle speed at a red light. My regular idle is 750, and the idle lope of my 230 cam, is hardly noticeable. But when I retard the timing,From the front seat, here it comes!
