3x8mm flathead screw.

any 3mm screw with a washer will be fine... i like to use a cap head 2.5 hex size screw.. less chance of stripping...

Except in the case of a losi. You need to use the losi washer and 3mm flathead screw.

is that 2.0 specific... cause when i had my 8ightT i used a cap head and a washer..

Hoping some of the gurus might be able to help me, I was running my btt yesterday and had a two stage idle I couldn't tune out, was running my X3 before and it was running perfectly, but changed to the btt and had the bad idle, thinking there might be a air leak, I ruled out the fuel lines, tank, pipe gasket as it ran fine with the X3, the gasket on the manifold/ engine was a bit worn so I changed that, no change, changed plug, idle improved. When tuning I had to lean to top a bit, got lean bog so richened hsn a bit, went to lsn, lean it untill idle stayed up but seemed like I had to go to far and idle kept two staging. This is the first time I ran the 2096 pipe on the btt, never had two stage idle with the 9901 pipe, so thinking its my tune. I read Monty mentioned you have to lean it a decent bit when changing to the 2096 but seemed
Fairly excessive how far I went and still had two stage idle.
Any suggestions how I should attack
It, maybe start fresh with the needles.

Mine was doing.the same thing at The Nitro Challenge this passed weekend, same engine and pipe, Monty helped me out, the HSN is about flush, LSN about 4.5 out, try that and see if it helps

Monty helping me out made a big difference, took him about 2 seconds, thanks Monty.

Cheers for the reply, I'll give those settings a go, my needles were about flush hsn and 1.5mm-2mm in from flush on the low.

different
 

what are the different preformens off

the 9901 pipe

and the 9001 super strong pipe

run it whit a nova bonito

thanks

the 9901 was kind thin and the thinger area bent in pretty easy

the ss pipe is the same just can take a better hit. and it got a deep rasp sound in because of the harder pipe it brappp sounds bettter lol

I was looking for a p5. and I could not find a place that sells them besides a main hobbies. I was wondering what other places sell them thanks.

http://www.absolutehobbyz.com/produc...products_id=89

http://www.houstonsengineservice.com...products_id/63

get a huston tuned p5 the things smoooth as glass rips and it got top end for days

:nod: +1 to that !! Monty's the man

BTTA tune?
 

I am having a hard time with my tune on my BTT and I have a Nitrotec also and always had a good tune on it. Anyway I have my needles at about flush on top and bottom and about 1 1/2 gallons on the mill 7.5 insert with a RE10 Losi pipe. I am having a hard time finding the sweet spot the bottom seems weak and the top is not consistent I hear it pick up about halfway down the straight. I guess it's rich on bottom but smoke is thin and ldle moves up and down if I lean it on bottom also the top blubbers down the straight if I go above flush on top. Not flaming out but don't seem to have the performance I expected my Nitrotec had more power. Temps never above 240f and sealed up motor good also new tank and lines. I was working on the tune today but rain decided to ruin our points race and I am just looking for some advice on what I should try to get it right! Thanks Again!

wrong pipe dude
re12 2096 or 9901

Yeah I am going to get a new pipe soon but I hoped it would work as well as it did with my Nitrotec but I guess not I do have a RE11 also maybe I should give it a try. Which of the pipes has a better bottom because we have jumps coming out of corners and short runs between jumps? Which do you recommend? Thanks!

i am not monty but i say a 2096 has more bottom snap
maybe try a hard clutch spring to

Anyone know if the updated carb comes with the 2012 BTTS or is the carb a option part?

yep deff wrong pipe you will need a 9901 and long hard header thats it its a sweet engine very smooth

Can anyone give me a quick rundown on the differences between the plus4 BTTA Tuned and the plus4 BTT Tuned? Is there ceramic bearing the only difference, and is it worth the extra $ for the BTT?

Ceramic rear is the only difference
worth the extra $ ? Thats a question you need to answer yourself

Novarossi bearings are pretty good in steel or ceramic

Thanks for the answer...

Right now I have a P5 XLT with a 9901 and was looking for a motor thats a little softer on the bottom with better topend. Is there a better pipe to run or would the 7 port Bonito be the way to go?

You r on the right path with the plus4 ;) :nod:

novarosi toro flameouts.
 

hi all. im running a nova toro. 9901 and 41021. using byron 30% and c6tgc.
what is a good baseline setting for the hsn and lsn and idle gap to get the engine running in a race. Ambient temps around 28-30 deg c.engine is fully broken in with good compression.

I would like to know this also....and what is the deal with the new carb...what part of it is updated?

I am getting a 2096 but I also figured out my tune issue I had the idle screw way to far in after I set it correctly I was able to lean the bottom to 4.5 turns out. 230f and screaming I should have set after I broke-in the engine (1 1/2 gallons) but I usually just back it down as I am leaning out during run-in but it was really open from factory so it was still to far in after break-in. Thanks Again!

glad you got it figured out Mick , good job!!

I am leaving you Alpha, hello Novarossi!
I am looking at buying the Plus 21-4 with the std plug. I potentially will have Monty break it in on the bench before he ships it. How much more fuel will I need to burn before "race tuning"? The reason I ask is that I likely will not have good enough weather before the first race of the season. A few days of decent weather and the street is all ill have.
E

If you wrap the head in foil you can run it in pretty cold conditions for break in. Just make sure you preheat the engine and let it warm up good. Youll have to run it richer than normal but that's good for break in, it will have extra oil running through the engine. I did an engine like this in 30 deg weather. If Monty is going to break it in ahead of time I'd say a half gallon should be good but he would know better since I don't know how much he breaks them in.

You'll know when the "nuts drop." LOL. I had him do a break-in for me in '09 on a stock Plus4 and it was flawless when I received it. Like posted above it took more than half a gallon more to fully break-in and drop it's nuts. I still have that engine...12+ gallons...gettin ready to put in the 3rd front bearing(every 4 gallons like clock work)...had it pinched at 10... still working great.

However it has become the backup to my Xtreme Tuned X7 that I use in truggy. So I didn't get to use it much last year. Just in buggy a couple times.

Thanks for the answer! And yes, I understand nut dropping. I have dropped my nuts a few times:cool:
E

I'm still very much a noob about engines. Although I flipped several pages on here, I can't really find a good comparison between the 21+4C team, bonito and a btts. Anyone here can help me out in listing the pros and cons of each of them and how they compare? I'm running both buggy and truggy, whc engines might be better for them?

Thx in advance! Would really appreciate any kind inputs :nod::nod::nod:

OS Plugs
 

Anyone has tried using the OS P3 or P4 plugs for the Plus4C..?

OS turbo plugs have a different taper then all other turbo plugs, once you use a OS turbo plug you have to stick with them or change out the button to use a Nova, RB, Werks, or O'Donnell plug again.

yea but do they work ok or fine or crap or not, reason i ask is its hard to source plugs in my remote location and easier to get os plugs can you use a os button maybee ?

Do not attempt to use the OS button. You can use the OS P3 / P4, I believe the P4 is preferred, in the Nova. Just as beidle99 says, once you use the OS plug, you should not switch back to Nova plugs in the same head button due to the taper difference.

A person I met here on Tech mentioned they have two head buttons for their 21-4C Team...one for OS plug and another for Novarossi plug. A bit extreme IMO but it works for him. :nod:

Its not a plus4 C but Ive been using os p4 plugs in my Nova plus4 btt with 30% fuel for the last 5 months no problems, work fine. They last about 2ltrs of fuel before they start to get tired and need replacing, obviously depends on the tune with life.

The Os plugs will work ok, but just keep in mind that because their taper is different, you can't run other plugs (like the novas) on that head button again.

I have a Plus 4c that was giving to me used with 1 gallon on it but i dont know what plug he used to used. How can i tell if he used the os or the nova plug? I dont wanna force any in there.