mrgsr

iTrader: (15)

I just picked up an evo 3 and noticed the sleeve is very standard. on my previous engines i used to dremel small tear drops on the sides of the ports and this would make small noticeable power.

has anyone modded there liner in this way and what sort of changes were experienced??

thanks
john

rcrevolution

iTrader: (1)

doesnt matter if the sleeve is standard or radically different as long as its making that power

Scott Fisher

iTrader: (28)

Try the IDM version. Modified and I am almost sure the piston and sleeve and hand fitted.

stefan

40° ABDC to 60°ATDC on both engines

slightly under 7mm on both engines


Exhaust 166° on both engines
Transfer 114° on both engines

That's right, but the changes from the EVO 2 to the EVO 3 are mostly in the selection of materials for piston, crank and rod, which makes a considerable difference in power and consitancy

stefan

That's correct. All the parts of the IDM modificato versions are hand selected. That includes the crank and the bearings as well.

The engines are assembled by Daniele.

Sp Racer

iTrader: (12)

Don't do it John!....just try some different pipes, when you get the right one you'll be amazed at the power

Team Kamikaze

iTrader: (3)

PICCO 2607 pipe set

mrgsr

iTrader: (15)

We have a guy here using a solaroli tuned efra version to this engine and they found the best pipe to be the miekle (mugen efra 2501)..this pipe had the most improvement in power over the rev range.

they also tried the novarossi 2630 and picco 2607. the feedback from the 2607 was it had huge bottom end but ran out of legs rather quickly. it was used on a kyosho rrr using 17/23 55/60 gearing.

I will try the picco 2607 as we have one coming from kamikaze so ill see how it goes.

tl2111

iTrader: (21)

'


Michael
Believe me 2607 is the 1 you want..I have use nr2501 with the JLR too but is no where near the performance of the picco pipe, my exprience of the Mugen pipe is, its allow you to lean the bottom end without the sign of lean bog but engine runs hotter and top end tune is very touchie, sweet spot is narrow not as wide as 2607 also you need to play with the head shims to make the most out of it.

RayJ

Interesting on the crank bore being unchanged. I slightly enlarged the crank bore on the first version of the JLR to 7.25mm and the engine gained some rev's and smoothed out the bottom end. It also didn't sacrifice in fuel mileage or bottom end. I'm surprised they kept the crank bore the same. I also had cut a recess into the back plate, and upped the transfer timing afew degrees and the motor revved like a beast. Of course none of these things are necessary since the motor is fast right out of the box.

Team Kamikaze

iTrader: (3)

The bore measurement on the crankshaft of the JL EVO 3 is 7.45mm,
while the crankshaft bore measurement of the JL2 is only 6.75mm,
that is a whopping .70mm difference.

stefan

Show me!

tl2111

iTrader: (21)

Sam is right!!

Evo3 has a IFMAR crank(no limit), while the Evo2 was using EFRA crank(below 7mm) I have both engine

Team Kamikaze

iTrader: (3)

I suggest you buy a JL EVO 3, so you can measure the crankshaft's I.D./BORE and see the actual measurement yourself.
for short Show it to yourself!

Team Kamikaze

iTrader: (3)

Thanks! tl2111