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Old 08-03-2008, 11:50 PM   #1
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Default JPX .21 motor shim?

Hey, according to the instructions for this motor Jammin claims you need a head shim to run 30%, Since Im really intrested in trying Tilted fuel..and I dont see 20% on there site. But the issue was when I bought the motor from Amain, that it didnt include the shim...

So I dont see shims on the websites, so is it really nessicary for this motor to be shimed to run that fuel or can I skip it? Ive got no problem calling Jammin and ordering one, just wondered if its really nessicary?

I broke the motor in with Od 20% since they claimed in the instructions to do it that way. I make decent power(not like I can tell...its just way fast, probally more than I can handle at times :P ) I get just enough smoke under power to know that its doing fine there. Just like the idea of the Tilted fuel prices vs my LHS.
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Old 08-04-2008, 03:30 AM   #2
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Maximo should be able to answer your questions.
Send him a PM, I know he can help you out.
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Old 08-04-2008, 07:20 AM   #3
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the motor comes stock with 3 shims..... 2 x .10 and 1x .05....... for 30% fuel I usually run .20 total shims..I remove the 1x.05.........adding more shims usually makes the motor lose power and run hotter.....I also run a medium/medium cool plug
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Last edited by Maximo; 08-04-2008 at 09:10 AM.
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Old 08-04-2008, 08:35 AM   #4
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Add 1 shim and your jpx should be perfect for any nitro up to 30%.
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Old 08-04-2008, 09:47 AM   #5
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Quote:
Originally Posted by Maximo View Post
the motor comes stock with 3 shims..... 2 x .10 and 1x .05....... for 30% fuel I usually run .20 total shims..I remove the 1x.05.........adding more shims usually makes the motor lose power and run hotter.....I also run a medium/medium cool plug

I guess I wasnt so lucky....I didnt get the three shims

But thanks guys for the advice!

Update: I located my old box, tore it apart....even looked through the booklets...nadda, I guess I will try emailing Jammin and see what they will do for me.

Last edited by Darth Smoke; 08-04-2008 at 10:00 AM.
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Old 08-04-2008, 10:26 AM   #6
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Quote:
Originally Posted by Darth Smoke View Post
I guess I wasnt so lucky....I didnt get the three shims

But thanks guys for the advice!

Update: I located my old box, tore it apart....even looked through the booklets...nadda, I guess I will try emailing Jammin and see what they will do for me.

Luckily if u get DJ or w/e his name is....He will do JACK Shi* for you.....they dont know there head from there A**es even if u told them where to find it....sorry to say...and i Hope u see this DJ and realise who i am.
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Old 08-06-2008, 10:04 AM   #7
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I still havent heard back from Jammin...and I sent the PM that same day I made the first post.....so, if someone has a .02 shim for this motor and wouldnt mind either selling it or parting ways with it...feel free to pm me, post here or email me at smoke20ster@gmail.com.


Thanks guys!

DS
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Old 08-06-2008, 01:15 PM   #8
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Quote:
Originally Posted by Darth Smoke View Post
I still havent heard back from Jammin...and I sent the PM that same day I made the first post.....so, if someone has a .02 shim for this motor and wouldnt mind either selling it or parting ways with it...feel free to pm me, post here or email me at smoke20ster@gmail.com.


Thanks guys!

DS


ill check if i got a spare of 2.....PM me with a addy tho so i dont forget
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Old 08-06-2008, 03:31 PM   #9
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PM sent, much thanks!
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Old 08-06-2008, 04:34 PM   #10
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Quote:
Originally Posted by Integra View Post
Luckily if u get DJ or w/e his name is....He will do JACK Shi* for you.....they dont know there head from there A**es even if u told them where to find it....sorry to say...and i Hope u see this DJ and realise who i am.
Let me start by saying when have I got into an agrument with you I'm looking at like surprize to me, and trying to realize who you are is drawing a blank but please refresh me on how I don't know shi*, must have been a call from you and we did not mesh, the only thing I can think of is about glow plugs in a Jammin engine, am I right or wrong?


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Old 08-06-2008, 08:00 PM   #11
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If you run 30% fuel on the stock engine you may get some detonation. I did. I could not find Picco shims so I bought some Novarossi long stroke shims and they fit pretty well. I could not tell a difference in power or fuel mileage with the extra shim.
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Old 08-07-2008, 07:02 AM   #12
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Quote:
Originally Posted by Darth Smoke View Post
PM sent, much thanks!

Shims on the way
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Old 08-07-2008, 02:59 PM   #13
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Quote:
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Shims on the way
Appreciate greatly...now I can order some Tilted fuel :P
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Old 09-01-2008, 10:48 PM   #14
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Default jpx .21 motor shim

when i bought mine for the jammin. i found those shims already installed in the motor, did ya take it apart yet, im confused by that 2 , i already had 30 percent fuel used it for break in and left them shims in there. so far so good but i wonder if i can take those out to make more power
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Old 09-02-2008, 07:37 AM   #15
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ok guys i'm running 20% do i run 2 or 1 shims and which ones ?
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Last edited by bobbyblaze; 09-02-2008 at 10:03 AM.
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