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Old 11-28-2006, 05:32 AM   #1
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Default Using a OS V spec buggy engine, what plug

Hi i am new to buggy nitros. i've run nitro tourer for a few years.

i need to know what number os plug or novarossi plug i should use in a v spec boggy engine using 30% nitro.

also do i need extra head shims?

i am racing in australia (currently summer 30 degrees celcius) with 30% nitro, good quality fuel.

it is the liverpool offroad track if any aussies are reading this.

another thing, should i use the WOT break-in technique (josh cyrul style) with this motor?

thanks

tomas b
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Old 11-28-2006, 06:56 AM   #2
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For best performance use the OS P3 plug. You can use the P6 but the performance will fall off a bit. I believe from listening to others that the Novarossi plug has a slightly different thread and can leak in the OS.

OS recommends installing the extra head shim supplied with the engine when using 30%, derive your own decision from that fact.

The heat cycling method as used by Cyrul has proven to be a good method.
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Old 11-28-2006, 09:45 AM   #3
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P3 works great!
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Old 11-28-2006, 10:10 AM   #4
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Actually, the P6 plug makes better power in the V-spec (dyno proven from one of the V-Spec kings...LOL )

Best regards,
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Old 11-28-2006, 10:26 AM   #5
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Quote:
Originally Posted by TonysScrews
Actually, the P6 plug makes better power in the V-spec (dyno proven from one of the V-Spec kings...LOL )

Best regards,
OK but we, the other V-Spec users and I, never noticed any improvment with the P6 on the track. Even after getting the tune right it wasn't any better and it seemed as if the P3 held a more stabile idle compared to the P6.

But who am I to argue with a dyno. To be fair, you should really try both and tune for each one accordingly and then decide which is better for you.
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Old 11-28-2006, 10:32 AM   #6
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Quote:
Originally Posted by AreCee
OK but we, the other V-Spec users and I, never noticed any improvment with the P6 on the track. Even after getting the tune right it wasn't any better and it seemed as if the P3 held a more stabile idle compared to the P6.

But who am I to argue with a dyno.

I agree with you p3 will give you lot's of power with a OS T-2050 pipe, it had a more stable idle
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Old 11-28-2006, 12:55 PM   #7
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Hey There,

Just wanted to add that I would only use a OS plug! I used a Nova plug and I think it contributed to my motor issues.I am running a P3 and that is what I will stick with.The Nova plug does not thread in well and also has a little bit different shape going into the combution chamber.
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Old 11-29-2006, 01:12 AM   #8
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Quote:
Originally Posted by motomanpat
Hey There,

Just wanted to add that I would only use a OS plug! I used a Nova plug and I think it contributed to my motor issues.I am running a P3 and that is what I will stick with.The Nova plug does not thread in well and also has a little bit different shape going into the combution chamber.

sh1T! ok... a p3?? even in 30 degree celcius weather?.... i'll definately add the shim to the engine, but i will double check with the guys at my track for the recommended plug. p3 sounds very very hot

thanks for helping. i will be breaking it in soon.

another question though, do the centax style clutches you can get for buggys work well or do they create too much punch?
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Old 11-29-2006, 01:40 AM   #9
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Quote:
Originally Posted by TomB
sh1T! ok... a p3?? even in 30 degree celcius weather?
what's 30 degrees celsius in farenheit?.........about mid 80's or so? that ain't hot. yes, use an os p3 plug......it's what comes in the box with a v-spec and is what everyone uses.
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Old 11-29-2006, 06:57 AM   #10
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The heat range of a plug is not determined by the ambient air temperature.
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Old 11-29-2006, 09:41 AM   #11
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Quote:
Originally Posted by AreCee
The heat range of a plug is not determined by the ambient air temperature.

yes...i know, although, i'm not sure that tomb does.
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Old 11-29-2006, 01:04 PM   #12
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That's who I was aiming the reply to.

Many people are confused by the word "heat" in the plug's heat range.
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Old 11-30-2006, 04:17 AM   #13
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From what I have gathered the heat range is the thickness of the wire on the plug!!!!
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