WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
Does wax's CDI fit in the e-box?
Ada Billet Cylinder?
- Thread starter FL-cracker
- Start date
I have personal experience with TL's in saltwater (not good xp, either).
However, I am convinced that if one takes the time to properly install and setup the ignition, it will be good in saltwater.
Like I said, enclosed. Or, alternatively, ritually rinsing and spraying down with lube to maintain a barrier from the atmosphere.
I don't see what big reliability or budget differences there are between a 5 and 6 mm stroker. In fact, since most 5mm stroker cranks have standard rods and many 6, 7, and 8mm cranks have 133 (longer) rods, I would expect them to have less cylinder wall loading than a 5mm, thus adding reliability. I could be mistaken though.
However, also one thing to consider is that when you are in the 85mm bore range, a 1mm differnece in stroke only nets you 10-15ccs of displacement increase. In essence the biggest gains in performance due to increased stroke/displacement wouldn't be realized unless you are going, for example stock stroke to 4mm or 5mm to 8mm, etc (big jumps in stroke).
However, also one thing to consider is that when you are in the 85mm bore range, a 1mm differnece in stroke only nets you 10-15ccs of displacement increase. In essence the biggest gains in performance due to increased stroke/displacement wouldn't be realized unless you are going, for example stock stroke to 4mm or 5mm to 8mm, etc (big jumps in stroke).
douglee25
m3booooy
- Location
- South Jersey
I believe you have it backwards. Decreasing stroke, increases piston speed. Also, the forces experienced on the piston on an engine with an longer rod are less than one with a shorter rod. The longer rod engine tends to almost stop the piston when it reaches TDC. Engine longevity may actually increase going to a longer rod setup.
Doug
- Location
- atlanta ga
jetskiking
Im done sanding!!!
- Location
- Dallas Georgia
Yes longer rods make it more reliable but I think you have it backwards about piston speed a longer stroke has more speed. Travels more distance in the same time.
douglee25
m3booooy
- Location
- South Jersey
Errr. This cold is getting to me. You and MattE are correct. Longer stroke = greater piston speed. I think what I meant to say is decreasing rod length increases piston speed.
Doug
- Location
- South Africa
Dont want to hijack thethread but are the rica stroker cylinders anygood?????? thanx guys.
Exile.
Exile.
waxhead
wannabe backflipper
- Location
- gold coast
yes my ignition system bolts into a stock lec box
its a plug in replacement to make it legal for stock class
ok stroke debate
the longer rod makes for a slower piston speed but the longer stroke make for a faster the longer rod is there to try and cancel some of the longer strokes bad points
the longer rod also helps with the rod angle ratio to stop the pisting forcing its self againt the exhaust port wall
its a plug in replacement to make it legal for stock class
ok stroke debate
the longer rod makes for a slower piston speed but the longer stroke make for a faster the longer rod is there to try and cancel some of the longer strokes bad points
the longer rod also helps with the rod angle ratio to stop the pisting forcing its self againt the exhaust port wall
jetskiking
Im done sanding!!!
- Location
- Dallas Georgia
So how does the longer rod slow down speed? Isnt it still traveling the same distance? I know the rod takes some of the angle out so it dosnt have as much pressure on the side walls of the cylinder but wouldnt the piston still travel at the same speed?
douglee25
m3booooy
- Location
- South Jersey
The point at which the piston changes direction is a change in acceleration. The longer rod slows this whole process down and reduces the amount of acceleration seen on the piston as compared to a shorter rod.
Doug
Edit: Here is a good diagram showing how rod length effects piston acceleration vs. crank angle.
http://e30m3performance.com/tech_articles/engine-tech/rod-ratio/accel-1.gif
Last edited:
douglee25
m3booooy
- Location
- South Jersey
Jetskiking,
There are two things usually measured, one being mean piston piston and instantaneous velocity. I have been referring to instanteous velocity which occurs at TDC. This is indeed lowered with that of a long rod vs. a short rod. Mean piston speed is what I believe you're speaking of, which does not change with rod length. This is based soley off of engine speed and stroke.
Does that make sense?
Doug
There are two things usually measured, one being mean piston piston and instantaneous velocity. I have been referring to instanteous velocity which occurs at TDC. This is indeed lowered with that of a long rod vs. a short rod. Mean piston speed is what I believe you're speaking of, which does not change with rod length. This is based soley off of engine speed and stroke.
Does that make sense?
Doug
jetskiking
Im done sanding!!!
- Location
- Dallas Georgia
Gotcha, so it increases duration in other words? I was refering to the speed the piston travels between TDC and BDC
waxhead
wannabe backflipper
- Location
- gold coast
it increases dwell time at tdc
which is good as it allows for more pressure to build up
which is good as it allows for more pressure to build up
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
longer rods also prolong dwell time which is good for torque.
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
oops,I guess I should have read more replies before I typed.
waxhead
wannabe backflipper
- Location
- gold coast
hahaha
but its a great way to get your post count up
but its a great way to get your post count up
douglee25
m3booooy
- Location
- South Jersey
Actually shorter rods are better for torque. The shorter rod sees a 'right angle condition' to the crankshaft sooner from a time perspective than that of a longer rod. I think many are confusing rod length and stroke length (like I did earlier :biggrin: ).
Doug
steve802cc
Team Ugly
- Location
- Sarnia Ontario Canada
yamasaki
Look what you started with the "'poor man's strokers" question.
Rod length, stroke length sounds like porn to me. Jetski porn:biggthumpup:
If you really want a "'poor man's strokers" you should go buy a Playboy.
For $5 you can stroke it all you want instead of $5000 for stroker Lamey
.:haha:
Ya I know useless post but I'm bored and crippled.
See ya
Steve