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Old 10-08-2009, 05:43 PM   #61
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Ok can someone clear up whats going on with the new V2 EB mods head button. My V2 head button came with 2 shims and the instructions state that under 3500 feet to sea level using 30% to use both the copper and alum shims that come with the V2 button. Another fellow racer told me that Tony from Tonys screws told him to only use the alum one. Someone is confused. Can anyone clarify it for me. My engines run well but I want the EB Mods head button to be installed correctly. Thanks.
I just installed the EB mod V2 head button on my ninja and I have my instructions in front of me now and mine clearly state NEVER install both shims together. Aluminum shim .008/.2mm sea level up to 3500ft 30% P4 or 3500ft and above 40% P4 Copper shim .004/.1mm sea level up to 3500ft 20% P4 or 3500 and above 30% P4. I hope this helps.
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Old 10-08-2009, 05:48 PM   #62
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So you have the 1st version or the new V2 version of the EB Mods Head button?
Frank, with the V2, 30% under 3500ft you only need .008 in shims... either one silver or two coppers.
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Old 10-08-2009, 06:01 PM   #63
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So you have the 1st version or the new V2 version of the EB Mods Head button?
V2 mate as there is 2 dots cnc into the button
thank fark i got it rite finally something i did was rite
frank mate i hope this helps ya and thaks for ur time ppl
and this thing is animal in the losi
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Old 10-08-2009, 06:22 PM   #64
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Frank, with the V2, 30% under 3500ft you only need .008 in shims... either one silver or two coppers.
Cool because I swear that my instructions say something different. I will check again when I get home. Thanks for the input I am all twisted up over this head button thing.
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Old 10-08-2009, 06:28 PM   #65
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Cool because I swear that my instructions say something different. I will check again when I get home. Thanks for the input I am all twisted up over this head button thing.
Yea i think there was a typo in the first batch that went out, i think him or tony posted a warning about it somewhere.. either way it wouldn't harm anything, u'll just make more power now..
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Old 10-08-2009, 06:44 PM   #66
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Yea i think there was a typo in the first batch that went out, i think him or tony posted a warning about it somewhere.. either way it wouldn't harm anything, u'll just make more power now..
look out franky baby more power ehh to an already powerful motor ull love it no doubt and i guess the skys the limit hay
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Old 10-08-2009, 09:03 PM   #67
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Ok guys I am very confused now. Here are the instructions that came with both of my V2 EB Mods head buttons. So help me out, I am pretty sure it tells me to use both the alum and copper shim for 30% around sea level.

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Old 10-08-2009, 09:07 PM   #68
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So thats the secret to crazy fast. My pitman calls my buggy crazy fast down the straight. Hummm and is that also why it eats a little more gas than usual? I think I am leaving it in

Thanks for the info Joe
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Old 10-14-2009, 05:15 AM   #69
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Ok guys I am very confused now. Here are the instructions that came with both of my V2 EB Mods head buttons. So help me out, I am pretty sure it tells me to use both the alum and copper shim for 30% around sea level.

Frank,

I just checked the V2 head buttons I have here in stock and they have the same instructions as yours. I'm not aware of Ed making any changes but I'm calling him now to clarify. Sorry for any confusion.
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Old 10-14-2009, 05:44 AM   #70
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tony p i have this
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Old 10-14-2009, 06:04 AM   #71
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tony p i have this
Mrbusta,
Only 20 head buttons have the directions you have. It's NOT a misprint.... Just please follow your specific directions for your head. After the first 20 I started machining the heads to use both shims to keep it simple. And for 20% you would remove the .004" (0.1mm). Verses swapping out the two shims. Also another note that will be added to the instructions will be to set the head so the two dots, or V2 is above the exhaust port.

30% Nitro
Two Dots= .008" shim
V2 on top= Both Shims (.012" total shims)
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Old 10-14-2009, 06:18 AM   #72
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Thanks for the clarificatio. So we are both right. I have 2 buttons with 2 different directions it's a little confusing but I think I got it. There's no mistake is the instructions just follow which ever set you have. One version uses both shims and the other version only uses one shim with 30%. Thanks I thought I was going crazy.
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Old 10-14-2009, 06:40 AM   #73
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Mrbusta,
Only 20 head buttons have the directions you have. It's NOT a misprint.... Just please follow your specific directions for your head. After the first 20 I started machining the heads to use both shims to keep it simple. And for 20% you would remove the .004" (0.1mm). Verses swapping out the two shims. Also another note that will be added to the instructions will be to set the head so the two dots, or V2 is above the exhaust port.

30% Nitro
Two Dots= .008" shim
V2 on top= Both Shims (.012" total shims)
I was trying to call you Ed....LOL

You in the shop?

Thanks for posting.
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Old 10-14-2009, 07:04 AM   #74
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hay I did mine right and even got the two dots going
the right way I'm on a roll
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Old 10-14-2009, 07:27 AM   #75
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Hi tony, got this from the mugen site. It accurately answered my shimming question. I really made a mistake in shimming cause i used the copper shim 25% nitro and p4. But more than this I thing metal fatigue was the main issue why the piston shattered. Can wait to put this on the speed.



UPDATE!

New V2 (version 2) EB Mod JX-21 Head Buttons

The new V2 head buttons offer the same performance gains as the V1 head buttons but allow for further tuning options. The shimming has changed on the V2 head buttons.

The standard shimming is now one 0.2mm (0.008") aluminum shim for 30% nitro and altitudes under 3500 feet. If you're in higher altitudes (above 3500 feet) and run 30% nitro the deck height is dropped by using the 0.1mm (0.004") copper shim instead. With the V1 head buttons you had to run 40% nitro since you could not drop the deck height.

For extended run times using 20% nitro fuel use the 0.1mm (0.004") copper shim only. Testing has seen an increase of almost two minutes run time. Of course the motor makes less power on 20% fuel but with the performance gains of the head button it can be a nice trade off (especially since 20% fuel is cheaper than 30%).

Ed also recommends the use of a P4 plug due to inconsistencies amongst 30% nitro blended fuels (just because the label reads 30% does not mean it's 30%). Personally I haven't had any issues running the P3 plugs in my JX-21 B01 engine but a very small number of guys have had tuning issues. If you have P3 plugs I would use them unless you see signs of detonation on the plug or have tuning issues. On the dyno, the motor makes better power using the P4 plugs. If you're running 25% nitro fuel, follow the shimming instructions for 30% and use the P3 plugs.

The V2 plugs can be easily identified by two marks machined into the top of the head button.

_ _ _ _ _ _ _ _ _ _ _ _ ____
Tony P.
I shimed my engine from this above thread, But im not sure on the the two V2 dots over the rear exhaust port will check this out when i get home. I'm happy with the out come of the head button on the Speed 2(Hara edition) and was looking at getting another for the standard V Spec as well.
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