the MSR 1005 really works well on the 28's...on the .21's it tends to soften the bottom a little too much...but screams on top end

Neal, which way should I build the jammin? Weighted flywheel with 16 tooth bell or aluminum with 17 tooth?

Is it a big track or a small track ? and what kind of traction will be available ? The surface you run on and size of track can make a huge difference on what is the ideal clutch setup is.....

Ya, I got that part. Its a huge track with plenty of traction. i am specifically referring to my bottom end power. What would be the difference between heavy flywheel and lower gearing compared to lighter flywheel and higher gearing. Last race at the Nitro pit I had a 16T bell with aluminum wheel and it had too much bottom. This time at the Nitro pit I wanted your opinion which of my two options would be better. I just want to tame the bottom down a tad, not have it so tame that it stinks. I like a snappy engine with good bottom end, but not so much that it breaks the tires free or makes my buggy do wheelies, which is what this JPX is capable of. Not that I dont love it, I just dont want to have to change up my whole clutch set up after I get to the track. what do you you suggest?

I would try the 16th with weighted flywheel.... then tune engagement using springs and shoe compound.....

Thanks, I'll give that a try and let ya know how it feels

Have you ever modded an O'donnell .21 SS? They are really cheap over at Towerhobbies and wondering if i sent it to you. Would you be willing to mod it? I have one now with a gallon or so on it. Overall Im pretty happy with it just would like a bit more power. Not saying they arent but if your engines are what you say they are and what ive seen from your vids then this little motor should move really well with some of your handy work.

Neal I have wondering about something. When looking at a vspec piston and a jpx piston, the o.s. Piston is noticeably bigger then the jpx. So does that mean the jpx has a longer stroke to have the same .21 displacement or cubic inch? I would have thought the bigger piston would create more torque, but that is not the case. Just curious if you are not to busy.

Hey Neal I just got the new OS Speed in today (sent you a PM a few days ago about it). I am gonna end up putting in my new Durango 408 once it comes available (already have ot on pre-order on Amain!). Have you had an opportunity to review the specs on this engine? I am also looking to pick up one of your Clocked B6's.

If you were to put your mojo on the new OS, do you think it has the potential to be better than the Clocked B6 (run time, low end,top end, pure awesomeness)?

Thanks!

in 4 strokes engines long strokes usually creates more torque and short stroke usually creates more rpm ( this is old school thinking.. allot have changed)... but in 2 stroke... there is a lot more factors that come into play when dealing with torque... the port and induction timing will have more of an effect for torque than the bore x stroke ratio...

take for example the toro... when they first came out with the long stroke no one would of ever thought it would be kinda soft on the bottom... now they readjusted timing on the crank.. change the piston and it changed the engine...

The V-Spec has a bigger bore and a shorter stroke... traditionally the longer stroke engines make more torque and the shorter stroke engines make more RPM....However in 2 strokes many other factors are involved in determining the engines powerband characteristics....I am not sure I can explain it all properly, but its safe to say Picco engines make insane amounts of torque !

I would be definitely willing to give the engine a shot...I have not modified one yet, so its hard to say what can be done till I actually measure up the engine....But I can make more power with pretty much any offroad engine i come across....Feel free to send it in and I can have a look at it...

I am not sure till I measure up the engine and do some testing on it....As I said in a previous post I can work with pretty much any offroad mill...But till its running on the dirt its hard to speculate if it would match or exceed the Werk's engines.....The modified B5 and B6 have some very impressive stats behind them, so its going to be a very tall order to match them let alone exceed them......

Hi Maximo,


I have a question,when a sleeve gets modified,ported,and cut does the integrity of it deminish.
Does it still have the solid foundation it once was.

I'm just asking,because someone thinks once an engine is modified,it loses it's reliability.And all I can think of is that for it not to be reliable,is that the sleeve has been structually weekend.What are your thoughts...

My modified engines actually will look almost 100% stock to the untrained eye...I do not cut a pile of material out of my engines at all...so there would be absolutely zero loss to structural reliability...

However there are some things to be considered with modified engines...
- they rev harder, faster and higher then stock engines do....so if you tune it lean, damage can happen faster
- because they have more power and RPM they can be over revved easier.
- If you abuse the modified engine, damage can happen faster
- tuning and setup do become a little more critical..these are legitimately modified engines, they do make substantially more output then the stock version...Any time you increase the output of an engine the sensitivity to setup and conditions does increase...However once setup and tuned correctly they will run much sweeter then the stock counterpart will..you will not only see a difference, you will also feel it in your trigger as well hear it in the exhaust note...the modified engines flat out scream !