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Old 06-04-2008, 07:19 PM   #1
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Default Jammin 21 or Dynimite 21 help?????

Jammin 21 or Dynimite 21 help????? lookin at one or other any comments would be helpful
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Old 06-04-2008, 07:23 PM   #2
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Ive never had either and only seen the jammin 21. I will tell you the jammin 21 rips, I have heard they dont last as long as others though. Thats the only info I can give you on them.
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Old 06-04-2008, 07:50 PM   #3
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Both are excellent mills and than jammin will last forever. Like every engine you need to treat it right but longevity should not be an issue. I have personally seen both and with the propper tuning and piping you shouldn't be able to tell much difference. I can say though jammin parts and accessories are built to the hilt. If you can find the jammin I would run with it man
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Old 06-04-2008, 08:20 PM   #4
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I have the Dynamite


Its performance and mileage is outstanding
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Old 06-04-2008, 09:09 PM   #5
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I just got the Dynamite and have raced it once, and my dad has the Jammin and has had it for a couple of months now. The Jammin has more power I would say, but it hits hard. The Dynamite still has plenty of power, but seems smooth throughout the whole powerband. The Jammin has a JP-1 on it and my Dynamite has a JP-3 on it.
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Old 06-05-2008, 07:32 AM   #6
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I run the JPX .21 and the P7R Evo 2 and for the same price, the Evo kicks the JPX .21's butt. Not a much bottom end but the thing rips in the mid and top end.
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Old 06-05-2008, 07:47 AM   #7
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I run the JPX .21 and the P7R Evo 2 and for the same price, the Evo kicks the JPX .21's butt. Not a much bottom end but the thing rips in the mid and top end.

the JPX and EVO 2 are indentical engines...same power/rpm and tq...........any differences your seeing are from your setup or breakin techniques...........
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Old 06-05-2008, 07:49 AM   #8
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A Jammin JPX is one of the fastest ( IMHO "THE" fastest) .21's money can buy...... the Dynamite Platinum on the other hand is a very mild SH built .21... the Picco engine outclasses the Platinum on every front...power,rpm,tq,longevity etc..... the Dynamite motor is really a glorified sportmotor made in Taiwan..pretty expensive for what it is IMO....

Last edited by Maximo; 06-05-2008 at 08:07 AM.
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Old 06-05-2008, 11:08 AM   #9
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the JPX and EVO 2 are indentical engines...same power/rpm and tq...........any differences your seeing are from your setup or breakin techniques...........

There are differences between the Jammmin and EVO 2. The Jammin has the P9 On-Road crankshaft in it and a turbo plug. The Picco has a standard plug in it. Evo 2's tend to have more mid range and low end.

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Old 06-05-2008, 11:19 AM   #10
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You can just look at the two and see they are not the same engine ....
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Old 06-05-2008, 11:22 AM   #11
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i love my jpx .21 easiest engine ive ever broke in or tuned it runs great and hauls at about 200 degreeseim still under a gallon on it so ill lean it out little by little
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Old 06-05-2008, 01:02 PM   #12
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There are differences between the Jammmin and EVO 2. The Jammin has the P9 On-Road crankshaft in it and a turbo plug. The Picco has a standard plug in it. Evo 2's tend to have more mid range and low end.

Roger
trust me..they are the same engine... the JPX has identical timing, identical crank bore.. the only difference is the head button(old EVO 2 has both)......... I have modified and timed many JPX and EVO2 engines......... the cranks are no different whatsoever.... but I will say Picco is not 100% consistant on engine dimensions, you will see slight fluctuations motor to motor, but as far as timing,crank bore,sleeve timing, case volume, piston,bore/stroke etc they are identical engines......FYI the P9R has the same crank timing as the EVO2, which is the same timing as the JPX.. the P9R has its sleeve timing much higher...
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Old 06-05-2008, 01:13 PM   #13
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How I know so much about these engines is because I somewhat specialize in modifying Picco engines..... Every single motor I modify is timed, both sleeve and crank.. every motor I modify has both crank and sleeve timing altered.... So over the course of the last year I have worked on several dozen of these engines....Picco will change timing and crank bore, but those variences will be in all 3 variations of the Picco ( Drake,JPX,Picco) all the offroad .21's share the same crank timings, same opening, same closing.... You will see a oddball crank with a extra few degrees every nowand then...Some JPX mills have a 9.8 mm bore, others a 9.9 mm bore...some are harcoated all the way thru the crank...others are bare metal dowm the bore......... older .21's had transfer ports opening earlier then boost, lately Picco has been opening boost a little earlier... Month to month I see a swing int he way Picco times and builds then engines... Adam from AB mods also hand times every engine and has also notices when Picco updates the lineup.
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Old 06-05-2008, 03:13 PM   #14
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The Dynamite should perform quite well. From what I understand, it is the same engine internally as the Sprotwerks V2 .21, which is an excellent running engine when tuned correctly with an 053 pipe. The SH engines I have seen don'e seem to last very long but I have heard of others getting great life out of them. The sportwerks engines I have seen run were as fast as just about anything else with 7+ minute run times.
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Old 06-05-2008, 04:43 PM   #15
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Jammin 21 or Dynimite 21 help????? lookin at one or other any comments would be helpful
do your homework and reserch, the newest dynamite is not the same as last year, i think the newest version is called the XP, it is factory modded and the same as the new SH, it has a lightened crank and filled with the red epoxy, and the crank counter is also a little more aggressive, this motor is good on open flowing tracks, i have ran them myself and they perform well, your laptimes with this engine will be more consistant compared to the picco, it's not as explosive, the dynamite has a great linier feel with very goot topend, and the new dynamite is also turbo i believe, and the price is still only around 215 220. it's a good all around engine.
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