8 mins just

ok guys

i have a nova 3.5 pluss on my losi l8ight model. i have been running 20% fuel with a OS P3 PLUG. I ALSO HAVE A 7.5MM INSERT IN MY CARB. i still have a relatively tight pinch so i have some more breakin to go. my question from you guys is i want to race using 30% VP Racing fuel. What glow plug should i start with when i change? also should i change now and finish the break in or stay whith the 20% untill finished?

thanks for any opinions and knowhow you guys share with me.
edward

Yes it is a Mugen
Sorry the plug is a c6tgc[/QUOTE]

I'd say its your fuel tank. Mugens are known for that. Try replacing the o ring in your tank lid.

Hi all,

I have a Plus4 which has done slightly over a gallon. Still has very good compression and it was running well till recently ive changed the fuel. Simply cant get to tune the low end right. Was previously using the 30% Maxina Orion and now switch back to 30% Byron. Tried to chamge to the turbo button head from the std button head and use the Odonell 97t and c6tgc but to no avail. When i set the lsn a bit rich, it will just flame out aft idling for 10secs when i punch the throttle. When i set it a bit lean, eng will kept on reviving at high rpm n when i tune down the lsn.. Punch full throttle aft 10sec and eng will flame out..
The only way i can keep the engine running is to keep the idling high..
It cant be the tank or the fuel lines as it works fine with my xzb. Btw, im using a dyn053 pipe. Hsn is 3 turns out, lsn is 4turn out and idle is slightly more then a turn out from close without the 7mm venturi.
Thanks

Finish the break in on the 20% and OS (?) glow plug, you mine as well use them up. I'd then switch to the Novarossi C6TGC plug and VP 30%, tune it in and let it rip. The 7.5 insert should work fine, many use 7mm...others use 8mm, so you're right there.

Best of luck!

Did you make sure to transfer all the head shims?

Sounds like youre in the ballpark with the needles so kinda interesting ,

outside temps are?
If its colder out you might try c5tgc instead

Finish the break in on the 20% and OS (?) glow plug, you mine as well use them up. I'd then switch to the Novarossi C6TGC plug and VP 30%, tune it in and let it rip. The 7.5 insert should work fine, many use 7mm...others use 8mm, so you're right there.

Best of luck!


yeah the plug package just said os P3 ultra hot or thats all i remember anyway.

and thanks i only have about half a gallon of 20% left so i was hoping and even leaning to finish it off then switch. i can order the nova C6tgc plugs and switch over all at once.

thanks and have a good day

Fyi: if you used OS plugs in Your novarossi you should continue using them, suggest p4 though

Hope this helps

I have been meaning to comment on this one, but have been too busy to sit down and do it !

Anyways every engine is different in how it responds to having the crank stuffed.......some engines pick up power, some lose power....... I do not think the ramp itself has much effect on the mixture path and the differences we do feel are a response to the change in crankcase volume more then anything else...... But where I have seen the ramp affect the engine is when too much silicone is used to ramp the crank and it gets in the way of the mixture path...this hurts power, and I have seen it on the dyno......... If you think about it, the more places the mixture makes contact, the more separation it experiences ..just like sticking your fingers in the patch of a spray can.... The less we contact the incoming mixture the better the mixture flows with the least amount of separation.. All too often i see cranks that are over stuffed ..which not only causes a loss of power, it also reduces the engines mileage........Some factories cranks are actually over stuffed right off the bat, and can see noticeable improvements just by opening the channel up...they not only pickup power, they also usually pickup runtime.........In the end the crankfiller should not get in the path of the incoming mixture...filling a void in the nose of the crank is one thing, but partially blocking the intake path with a ramp of silicone is not a good idea. IMHO.....When I fill a crank I try to make sure my ramp will make as little contact with the mixture as possible....

This season I did a test comparing filled crank vs non filled crank using the Bonito...... Judging by whats written on these forums It seems stuffing the crank on the Bonito is believed to be the single most important mod that can be done to it.......As apparently this mod brings out the bottom end of the engine........... I actually ran a non filled Bonito vs half a dozen of the filled Bonito's all season long on the track.....During the season we all swapped controllers back and forth , and even did a few drag races.......You cannot tell which Bonito is filled and which one is not...these is absolutely zero difference on the track..... not one person could tell ..... The Bonito with the non filled crank had just as much bottom end as the filled crank Bonito...and whats really strange is the non filled crank engine actually was a little better on fuel.......


Anyways here is a video of the modified Bonito that does not have a filled crank.... It has massive bottom end and has no issues with idling down....so in the the end what was said/thought/sold to be the most important modification that can be made to the Bonito ended up being quite worthless for improving its performance.....And this is not just dyno testing, this is a pile of on track testing with some pretty skilled/experienced drivers....There are dozens of modifications that can be done to a Bonito that are a thousand times more effective then putting silicone filler into its crankshaft...Now of course I have not tested every engine out there in this manner...

sorry for the long post guys, but I figured I have some good insight into this, as I did do a pretty thorough test on this during the season....cheers !

edit: in no way am I implying anyone else info is wrong or false....i am just relaying what I found with my own Bonito and several other engines I have tested..

+ YouTube Video

Maximo, were your tests of filled vs non filled all on equally modded engines? Were the tests done on stock vs stock? To me all your post says is what the putty does to YOUR modified engines. I am gona guess maybe 1% of the worldwide racing population uses YOUR racing engines. It almost seems as if your trying to discredit someone and what they said, so I sure hope your experience your speaking of is with more than just your own modified engines!!

Chris, what results have your thorough independent tests on this subject matter produced?

So what is the ideal/safe temp for a Bonito? with about 1 gallon?

I have no desire to discredit anyone else...what someone else believes has no relevance whatsoever to my own findings.....

I have most definitely tested several stock engines...as I already said, every engine is different... I gave a case study of a Clocked Bonito....as that was the engine we did the most in depth testing with......I do not see anywhere that I am discrediting anyone else....If their view doesn't match my own its not my fault , And I do not believe I should feel obligated to withhold my experiences because it doesn't agree with popular belief.....Sorry dude, but if anything you guys are the ones trying to discredit me, not the other way around......It doesn't bother me much what other people are doing, Someone asked in the thread what filling a crank does, I answered...then pretty much got told I was missing the boat, so I came back and clarified why I said what I said about crank filler being overrated ..... its nothing personal, nor a knock at anyone else...I just happen not to agree with popular belief is all !

Ok smart guy, where did I say I had better info? I simply said he quoted a very experienced person in a thread that is not a clockwork racing thread. I asked him what his tests were based on and said I hope it's more than mod engines for him to quote Monty like that. Glad you and Neal touch pepes enough that you feel you need to stick up for him

Monty...I assume you recommend this based on the head button alone? Meaning once you thread an OS plug into the Novarossi button, you should not thread a Novarossi plug into the same button as the thread difference could lead to problems.

I've had other local racers ask me about using OS plugs in Nova engines. I prefer to keep plugs and engine brands in sync, though I do understand folks may have existing stock of one brand plug on hand.

Thanks and good luck at the Nitro Challenge!