So does the IDM have an advantage over the JL Red Dots?

Some people will say no and some will say yes. You will see different performance from both with the difference in the cranks. It will usually make the engine a little more efficient on fuel and also give better performance over the power band. But will it be a night and day difference I think that depends on the persons ability to use the engine to it's ability as well and all the other issues. The pipe and clutch will also make either one run well.

Hi,
For those people who had try using nova carb on their idm/picco engine, i need your reviews!

How does it works? better? Do we need to tune like picco carb? for example rich low end setting also? or tune like a nova? Thanks!

nova carb on piccos = tune like novas? as tuning is on the carb?
well, i'm not sure.

OK that being said what pipe is good to use for this motor?

2607 or 2617

ATS 2621 is also good too.......................

Thanks i just happen to have a brand new never used 2607 pipe

anyone tried a shim under the sleeve (like the red dot tuned) in their idm evo3?

yep, 0.2 mm makes quite a difference. if you need more top end, try it.

other than gaining more topend, any 'ill-effects'?
sucks more nitro, hotter, etc...?

if i add 0.2mm under sleeve, i got to remove 0.2mm from the button head right? to have the same head clearance...

other than a slighter higher consumption, I have not seen any side effects.

I'd recommend the 2617 pipe after you shimmed it.


Yep, that's correct

Btw, I am using head shims of a .26 GO engine. These shims have an inner diameter of 17.2 mm. Our engine (Picco & Nova based) sleeves have an outer diameter of 17 mm. The won't fit on Sirio, there sleeve OD is 17.5mm.

I cut the outer rim of the shims with lexan scissors.

There is also a RB 323/523 engine which has head shims with 17 mm ID, but it's a bit of a tight fit.

thanks bro...
no worries about the sleeve shim, i got 1 just for the picco.

higher consumption = 30s less runtime?

no, not that much. mine still makes 5 min easy.

what shim are you using?

stefan: i'm using the sleeve shim from my old tuned nosram.12

did an engine cleanup and observed the following (see pic).

time to ditch the engine? or replace new P/S and button?

caused by over-lean? i suspect caused by foreign debris...