here is a video testing a JP-1 tuned pipe on the JL 21....Very good power, likely well suited to a Truggy...we also ran a JP-3 and the video will be up shortly.....FYI this engine is actually very smooth, we are just driving it wide open all the time so it looks crazier then it needs to be

http://www.youtube.com/watch?v=q7hsC-jaEow&fmt=22

JP3 tuned pipe

http://www.youtube.com/watch?v=JClL9Qq6AQY&fmt=22

It sounds like the JP3 rips a little better! But just by a small margin

the JP1 feels better, but I think the JP3 pulls a little harder on top.....both work extremely well on the engine

I would confidently put my modified JL head to head with any engine in a performance contest.... the only thing faster i have seen is a modified Picco or C6...other then that I would feel this engine would be hard to beat...

Hey Maximo I tried the Sirio 2013 pipe today. Woow!! It runs fast as hell!! I was also able to lean my engine out 2 hrs. Temps around 230

I AGREE.... i want to see it on a jp2 also

I'm waiting for that too...Maximo? I spoke with OFNA and the said run it with a JP2 but my JP3 is soooo sweet I'm nervous about changing it. Mine is box stock and it runs with any of the big buck mills in my area. I ran RBs then Novarossi P5s for the past 2 yrs and I like this one better than my P5s. I feel like the motor let's me be smoother instead of me smoothing the motor...does that make sense? Maximo,what all does Clockwork offer on the mods for this motor?

without getting into the technical changes to the engine...if you were to run the stock back to back against my modded engine you would see a immediate increase in throttle response and low end power, The midrange will be snappier and crisper and the top end runout will have several thousand RPM over stock...so much so you will notice an immediate and distinct difference in the exhaust note...you will be able to clearly tell the modded engine from the stocker just by the sound alone.. from bottom to top the mod engine will have a much angrier note to it...... Interestingly even tho the mod engine carries a big whallop it is still very tractable and smooth to drive.........

Also ease of use, I microlap the pistons on my modified JL's so the need to breakin is almost non existent .. The engine will be ready to perform almost immediately after the bearings are heat cycled... you will not have to wait 2 gallons for the engine to drop its nuts....Which not only means less wasted fuel, but also much less wear and tear on the internals.... I also can mill the JL carb to accept Nova venturi inserts, which can help if your looking for a little extra mileage.......... All in all my mod engine will be easier to use, will rev effortlessly and carry a fair bit more usable power under the curve....And with the inserts allow you to fine tune the mileage and power to your track....On a performance level my $250.00 mod engine will beat out engines costing much much more...The mod JL is very very fast and will hold its own against anything you will ever come up against.....

Have you run both engines and are basing this on experience or is this just your 2 cents??? I've read throught this whole thread and this mill sounds great, the only 'problem' I see is all discussions talk about it in it's modded form. I have no doubt that a modded engine will outperform a stocker, why else would you get it modded....!?!?!?!?!?

Maximo, how bout doing a budget engine shootout, box stock on all, with dyno info, video, and your reaction to how they felt. I'd love to have my Werks B5, the JL21, the new JS racing mill, the ODss21, the Alpha all broken in and paired w/ their optimal pipe and do real world back to back track testing.

The Werks B5 does have alot of buzz because of Ron's support coupled w/ its price and performance in BOX STOCK FORM. Jeremy Kortz consistently places in the pro Amain w/ the likes of Drake, Mayfield etc. with the same exact engine I or anyone else can run.

I am bringing in the Werk's engines next ! And I would love to do a stock engine shootout ! I plan to get pretty much anything I can get my hands on onto the dyno..and providing the weather is good I will gladly do some track testing side by side....

In its stock form the JL has a smooth bottom , good mid and great top end...I doupt it has the low end of the Werk's, but based of its timing I wouldn't surprised if it has more top end....however that is just speculation at this point.....

Just my 2 cents, trying to pump up the JL, its just my opinion I get excited I have 3 JLs all stock and love them.

I had a great time this weekend with my Clockwork JL's!!! My home track opener was this weekend, there was a lot of competition that made for a very long day! There was a E main in truggy and a F main in buggy! I TQ'd truggy and qualified 4th in buggy! I finished 2nd in truggy to Anthony Mazzara (100% factory Team Losi driver), same lap and 4th in buggy.

As the temps here on the east coast have started to rise (75*f) I have experienced some mystery flameouts with the OD 97T. I did alot of testing with colder plugs this weekend, O.S. RP6, P7, and OD 99T. Maximo (Neal) and I have come to the conclusion with the mods and compression I'm running I needed a colded plug, I found the OD 99T to be the best. I ran a JP1 in truggy and a JP3 with RB carb/7mm restrictor in buggy. I had no problems doing 8 mins in my 20 mains, I didn't want to push it for 10mins and run out of gas. The JP1 is great for lowend but I also feel it lacks topend over the JP3, I would carry one of each to change out if needed on the size of the track.
They was a sea of other engines out there this weekend, you name it it was there! A distance friend of mine got out of his pit chair to come see what engine was making all the noise coming down the straight. It was my modded JL that caught his ear, he came over to me after I was done, he could not believe the exhaust note, he said it was like the engine was talking!!!!

I also had some mystery flame outs yesterday. What sucked the most was that my Clocked JL was awesome all day through practice and both qualifiers. I qualified 3rd overall and then when the main started I flamed on down and quiet, and then 3 more times during the race!! I was so pissed I called Neal and he said it could have allot to do with the Odonnell plug. Even though I put in a brand new plug right before my main. Im going to switch to Picco, or OS plugs only and see if that makes a difference.

Your going to find that as the ambient temps climb the modified JL is going to want to run a cooler plug...With the timing and compression the engine runs the OD97 will start acting up in warmer weather.... Chances are a OD99 will work excelent, as its slightly cooler then the 97....Myself I have been running Picco P6TH , however my climate is still quite a bit cooler then yours...But as a general rule a medium Picco should do the trick...either a P6TH or a P7TH........There is nothing wrong with the OD97, but we are running it in a more aggressive environment then it was intended, we aren't far off the 97T's capabilities tho so a switch to the 99T may be all that is needed.........Also as a general rule a 97T will not work in most of my engines, the coils are not durable enough to provide reliable performance... In one of my Picco's the 97T's will barely last a couple of tanks before the coils start distorting and the tuning becomes erratic.....While in the exact same engine and setup a Picco P6TH will last several gallons and provide stable tuning and performance the entire time.... In a really hot climate I would run a Picco P7TH...But be aware that due to extremely thick coil wire Picco uses this glowplug needs a really strong glow ignitor to fire it...If your glow ignitor is weak or not fully charged you will not get this plug to fire..I personally run a 1.5 volt hobby battery with a cable end...These plugs are a little more expensive then other brands, but they work phenomenally well in the high compression high output modified engines...They are built with high grade heavy duty coil wires, and will be able to operate effectively under the conditions we are placing them in.......

edit.. I will add that in a cooler climate you can get away with running a hotter plug.... But keep in mind that as the temperature rises the engines need for a cooler plug will also increase...