matt.mcinnes
2F-ETI
- Thread starter
- #141
hurry up with the dizzy, i wanna drive this thing at vic winch!!
marin
Hope your saving for your tyres, till then back in your box NAVI. Oh no I'm the NAVI this year
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hurry up with the dizzy, i wanna drive this thing at vic winch!!
marin
Stronger yes lighter yes, LONGER would give us more torque and has been discussed but this will be left to the engine builder to make the decision, also I guess it depends on how the drop forged JE Pistons sit.
You looking for a set for your engine too?
awsome thread............holy $hit; I am running scared when I hit 3.000 rpm on my stock 2f!
Lou
G'day Matt,
It's fantastic to see such a 'technical' thread being posted by a fellow Aussie. The engineering skills of some of the members on this board are absolutely extraordinary and I reckon this thread has to be up there with the best of them. Keep up the good work and I look forward to bumping into you in the bush if you happen to be in East Gippsland.
Cheers,
Ben
P.S. A little of track but I'm curious about your choice of tyres. Why not something more aggresive Claws, Swamper, Simex (even the old faithful BFG muds) etc???
So you shortened up the connecting rods?
If so... Be careful with your rpms.
Mark...
Sorry... I was thinking about the 3F, not your 2FE set up.
In the case of the 3F, the short rod and short bore already put a lot of stress on the piston skirt. The piston drops out of the bore, almost to the pin. The rod is at a sharp angle when the crank is at 90* from TDC/BDC. Any shortening of the rod will only increase this angle/stress.
I've shattered two different pistons (skirts) in 3FEs from too much RPM. A cammed 3FE likes to turn up nicely. But the pistons can't take what the rest of the motor wants to do. Keep it below 5000. Factory redline of 4500 is not a bad idea.
I am actually more comfortable with a 2F at this RPM range than I am with a 3F. The much longer rod and longer bore eliminate this particular weakness. Achilles heel of the 2F is the rod bolts. These can be upgraded. The rod and bore of the 3F can not be changed.
If you are not shortening you 2F rods by much, then you should not have any skirt worries.
Without upgraded rod bolts, I'd still keep it under 5000, even with the 2F.
Mark...
and to a good home it has gone....thx matt.
i think the 1 st thing i need to do when mines up and running is get a rev limitter, or stop wearing boots...lol
btw i know its been said b4...great post, so much to learn, sent the wife into town to watch a movie so i cound use the dishwasher...lol, now to work out how to open it![]()