Super Jet Will increasing stroke change your timing
- Thread starter L.T.D
- Start date
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
I figured it would have changed some.
Hey Gil, are you reading this?
Hey Gil, are you reading this?
GIL
Power In The Hands Of Few
- Location
- Cullman AL
Chris, w t/l u set static based on stroke/piston height. Not arguing-but confused. How would stroke not effect stk ign w enhancer?
GIL
Power In The Hands Of Few
- Location
- Cullman AL
I installed stk stuff w/enhancer on a 8mill/144 rod Laney using oem timing marks and it don't run. Lol
GIL
Power In The Hands Of Few
- Location
- Cullman AL
Tl is going on it tonight.
Cannibal
Tasty Human
- Location
- Summit Lake, WA
Timing is measured in degrees of crank rotation. The crank is a 360* circle and the piston is at 0* at TDC no matter what stroke your crank is. So (for instance) if static is 10* BTDC stock and you install a stroker crank, you are still at 10* BTDC with your stator in the same spot.
HOWEVER, your piston is physically lower in the cylinder at BDC, moving through the cylinder at a faster speed, and spending more time at TDC/BDC than stock, so the timing REQUIREMENTS do change, but the physical measurement does not.
HOWEVER, your piston is physically lower in the cylinder at BDC, moving through the cylinder at a faster speed, and spending more time at TDC/BDC than stock, so the timing REQUIREMENTS do change, but the physical measurement does not.
So If I take an indicator find tdc and mark the case then line a degree wheel up and want to verify timing with a light mark the flywheel or coupler depending where I mark the cases for 22 degrees which is where it should be at 2000 rpm with and enhansor. Start it up take it up to 2000rpm check it with a light and adjust stator accordingly to get the actuall timing
GIL
Power In The Hands Of Few
- Location
- Cullman AL
Buy tl and keep it simple.
D-Roc
I forgot!
- Location
- Dirty River Rider
X2. Take full advantage of that stroker.
Never had much reliability out of the totaloss systems in the past. Mabe it was me. I have an epic but I don't want to chance a backfire and possibly bending rods. So am trying to get the most with an enhansor and Tbm flywheel. I'm happy with it how it is but I know theirs more to gain and was wondering if it was in the timing.
- Location
- New Jersey 732
I will save Chris the wasted breath..... Epic ignition properly installed with an electrical system ( IE all cables, battery, stator pickup wires etc, Timing set properly ) functioning 100% and fuel system 100% will not be subject to back firing. A-lot of the issues posted here on the X are continually being blamed on the epic when in fact they are cause by the operator lacking the ability to properly tune a set of carbs. There are plenty of guys that know how to tune motors and set them up running epic ignitions with no problems. For instance look at the FX-Mafia ( Gordon and JD ) their boats do not back fire, but they do rip like a raped ape!!! Do yourself a favor, run the epic, the gains from the available timing advance are tremendous. But at the same time make sure your electrical system is up to par. If your not sure of how to set up the base timing etc, call chris at ATP and I am sure he would be willing to walk you through it. Good luck
today I checked a std stroke engine at 30 degrees btdc the piston was .215 down on the indicator
on my 12mm stroker 30 degrees was .275 down on the indicator.
its around 4 degrees btdc lower than a standard crank so on this engine if i ran the stator lined up with the mark It had 4 degrees of advance in it.
so now when going to set timing on this engine do i compensate 4 degrees so its firing truly at the right time according to the crank?
on my 12mm stroker 30 degrees was .275 down on the indicator.
its around 4 degrees btdc lower than a standard crank so on this engine if i ran the stator lined up with the mark It had 4 degrees of advance in it.
so now when going to set timing on this engine do i compensate 4 degrees so its firing truly at the right time according to the crank?
- Location
- South Florida
No problems with the epic on my wifes ski for me and I am a tl man on my own ski. It does slowly discharge the battery whether I leave the lanyard on or not, though. That and still no comparison to tl in performance gain are my only complaints. It is bulletproof otherwise and surf safe which is why I bought it.
- Location
- Rincon Beach
30 degrees is 30 degrees, it will be a different DISTANCE from tbdc depending upon stroke and rod length
play with this http://john.rushworth.com/Pics/Piston/index.html
this reply is spot on
Db
also with an epic ignition you just bolt the stator in, there is an advance /retard feature in the software to alloy the entire curve to be advance or retarded
hard staring issues have been resolved with the latest units
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You are over complicating this, If you are running a TBM you need to check your timing, if you are running a stock 62T set up you do not need to check your timing, just line up the stator marks and go. If you need to check your timing, by far the easiest way is to program a curve that is just a flat line at 21 degrees from 2000rpm up. I think you know how to mark the flywheel so just start the ski and shine the light and it should be 21 degrees without needing to worry about holding the rpm steady. If it does not read 21 degrees just set the timing offset for the correct amount.
Chris.