How are you breaking it in Brian?

If you do a search of this thread for LSN or HSN you should get enough info to knwo where folks run the engine. Only slightly rich from those is where you need to be on the LSN. I'll let you do the research. Everyone wil have a slightly differente opinion as factory settings are still a mistery to everyone.

Just skimming through here it looks like someone might need a bit of help on their needle settings. My personal experience with the GRP engines/carbs is that you can only set the idle speed screw and have it close to where it needs to be before you fire the engine up. I start my engines with the idle screw in from flush by .7mm (.030"). Some of my engines the bottom needle is out a lot, others it's flush with the chrome part on the barrell, same thing with the main needle also.

Initial tuning I fire engine up on the box, warm it up, tune the bottom needle until it idles consistently, I.E. the idle speed doesn't rise or fall after you rev and clean the engine out some. If idle falls, bottom is too righ, if it rises and goes a little irratic, it's too lean. Once bottom is set I tune top/main needle on the street or track. Then after 1-2 tanks I will set car on box again and check/listen to the idle speed and "tweak" bottom and idle screws if necessary.

thats pretty close how i do mine. one thing tho i cant understand is my idle isnt irratic but when its idleing it raises rpm a little then drops back down. ive richend it with no success so i left it

TYpes?
 

Hi All

I am looking at getting one of these motors over xmas and was wondering what most people are running - Buggy or Rally

Also is the silver headed sport engine just the buggy spec with the std plug button?

Currently i use either RBws7 or OS VZB depending on the track so was looking at which engine would be similer to these in performance

Many Thanks

Lunie

probably......4 quick heat cycles ......idle a full tank ......then probably .....4-5 tanks at 1/4,1,2,3/4 , full blips around .....then just easy on track .....a few tanks ....i mean ive kinda settled in on break in now ....and will probably just start and adjust like ive done on most of my motors ... just noticed the lsn looks like its way out at factory settings ...thanks buddy .....:nod:

will os turbo plugs work on these engines? ive heard both. please only answer if you have personal experience

Yes. I run the P3 in mine and I know two other guys who do. None of us have had any problems.

need to read back through the thread :lol:i mean its been answered 50 times ....:weird:

i personally used the os p3 in my grp when i ran it, i found the plugs to be a little more reliable then the stock plugs

this question might have already been covered in the thread already (sorry if it has) i currently have a .21 buggy engine in my truggy, finding that i don't have enough low down power to punch out of the corners and i have had an opportunity to get a .28 at a reasonable price, so i was wondering if anyone knows what the run time is like with these. i know of another brand i can get that is a .25 6 port that i can get 10mins out of. so any help on this subject would be helpful.

cheers

10 mins is pretty hard to get with a .28, what pipe combination are you running with your .21? i found with a ttr 2035 and os p3 plug and 7mm restrictor the grp had plenty of low end power for the truggy, the 2053 that came in the promo kit didnt seem to have the bottom end power, i dont think any of the factory drivers run the 28 in there truggies

i run the 2053 in my .21 and a 6mm restrictor and get 11-12mins a tank, but im running a 14 tooth clutch bell and a 46 spur, even with a 13 on there i have people going past with 14's and .25 engines (low down i mean). but yeah i want to keep that 10+ run time.
I was thinking that with something like a .28 i could maybe restrict the throttle to say 70% and still have all that power on tap while never having to use all 100%.

in a truggy you should be running a 13tooth, try the 13tooth and 7mm restrictor and that should help with the power, the 14 is for top end, it will hurt the low end especially in a heavy truggy

I found the same thing.

I don't think you need a .28, just a .21 with a good bottom end. v-spec, new ninja, orion crf, plus4 etc, hell, even the go 5 ports.

the .25 i think would be in between the .21 and .28, might be a little easier to control then the .28 but give you more bottom then the .21, i dont think people are realistic with there fuel consumption numbers, i could get barely get around 10 mins on my grp tuned in race conditions, now if i was practicing it would easily get that 12-14 minute run time, im sure the people stating that they can get 10 mins out of a .28 are not going by racing run time, they are going off of what they get for run time when they time it in practice

The OS plug will fit and work fine, O'Donnell I am pretty sure will not. Had someone ask me why their engine was leaking fuel last weekend by the glow plug and they were using an O'Donnell brand turbo plug.

whats a good pipe for the tuned .21 grp?? i was planning on breakin my motor in with the supplied grp plug number 4 then switching to a os p3. but i need a pipe for it.

At the recommendation of someone else I bought and found that the Thunder Tiger 2035 worked well. I tried the JP-1, it didn't hit power band on the bottom side like I thought it would.

I didn't think you were going to skimp on the plug. In the nitro pit thread you said " I dont skip on the details. Ill spend the extra dough and ill use the grp plugs." Funny how 5 bucks will add up quickly. That plug that came with it is way too cold for this time of year toss it and run an OS P3 and never look back.

Those that have leaks must of had defective plugs or head button is all I can think.

Novarossi and OD plugs will not work.

Did you get the 2053 in the promo kit? You might like it in Buggy.

2035 of nova 9853 is what i found worked the best on the grp,i also used the os p3 for the glow plug, i found the grp plugs to be unreliable

i did say that, i asked many people and they said that i would have no problem runnin the os plug, the only issue i had was leaks from the plug, but if there were no problems i would like to save 7 bucks on a plug lol. and no i didnt get the promo kit i got a hell of a deal for the grp. and i was told to run the grp 4 for break in and then once break in is over switch plugs. How much is it for the grp promo exhaust

i wouldnt waste the money on the grp pipe, mine came with it i ran it for around a month and wasnt really happy with the engine, once i switched to the 2035 p3 and 7mm restrictor the motor really started to work well, pulled real well from the bottom to the top

They go for like $80.00 new. I have a used one listed on eBay right now. Had I known a local guy was in the market for one I'd given you a deal on it. It's item# 190273301826. Check it out. It might go for cheap. If you win I can take it to SRS this weekend or you could swing by my place and pick it up.

I didn't like it for Truggy.

I don't know why you wouldn't want to break in an engine on the plug you intend to use. But if that is what you are set on go for it...

it would be easier to break in with the os p3 plug, i am with desert bird i would just start with the os and stay with it

hey bro ...was just on the the phone with alan burton ...he said to check your post on the possibility that o.d. plugs dont work in this engine ...i had a question for ya ....

on the guys motor that you checked out that was leaking ....do you know what kind of plugs he ran before the odonnels ? because it seems if you run an o.s. plug then try to change to an odonells plug it will piss fuel out of there .....that i have seen first hand ...but it seems if you go with the odonells plug straight off ...it does not ...thanks man :tire:

I think I've read early on in this thread that OD and Novarossi plugs have a different tapper. But, it was proven by a tool and die guy that the tapper of a OS is excatly the same as GRP, but is ever so slightly longer going into the combustion chamber.

Search P3 and read for yourself.

no offense ..but ive read the whole thread:nod:...and if you read it you will find as many people had good luck with o.d. plugs as well as o.s. plugs ...but that the problem comes into play (i think ) when you swap from o.s. to o.d.
nothing personal against o.s. plugs ...i just have never had good luck with them in any motor ....but i know plenty of people who do .....i think alot of the problem with "the glowplug issue" and grp motors came from swapping back and fourth ....or well thats the way it seems when you read the thread ....i will know for sure this weekend ...as im breaking mine in .....with o.d. plugs ....or well unless they dont work .....:cry:

Well, I would guess that the change in plugs and subsequent leakage would be due to a tapper and length issue between plugs. I would only trust that OS has the same tapper as GRP, based on the measurements proven in this thread. No one, that I recall, has proven an OD plug to fit the same tapper or length. Maybe I just don't remember correctly, but I thought Novirossi and OD were interchangable, and that novirossi didn't fit GRP head period. I could be wrong, it's been 5 months since i've researched. So please do not take my word as gold, and feel free to correct me if i'm wrong. Hell, running that P3 is probably why my GRP had a sucky bottom in my truggy:lol:.

the od plug is tapered like a novarossi plug, they wont work in the grp, but once you ruin your head button send me a pm i have a brand new turbo button i can sell you with a grp plug

.


Word up! That's what I remember, no wonder the damn thing would leak with a P3 after suffing a OD in there:eek:.....:p

I have a gently used button on ebay right now, P3 run from day 1.:lol:

yeh i here ya on that ...how do you explain the several people on this thread that have used an o.d. plug before using an o.s. plug and had good results ...? just curious not meaning to aggitate :sneaky:...im just thinking by the looks of it ...you best be sure which plug you wanna run ...because you may be limited .....if it pisses fuel with an o.d. plug then im gonna have an assload of odonells plugs to unload ...one things for sure the results will be posted this weekend .....:ha::D

just keep in mind i have the button on ebay for ya to bid on:lol::lol::lol:

good luck with the OD, let us know how it works.

i dont know which page it is on, but someone a while back actually measured out all the different plugs, the only one that matched the grp plugs were the os plugs, i havent had a issue with a p3 i change mine out around a gallon of fuel, havent had one go out on me during a race, if you run the grp plugs make sure you run the 4 the engine acts a little finiky with colder plugs

yeh several peolpe had good luck with them ....(o.d. plugs)...on your bottom end i read through where you had issues with it ...i mean there are also several people who said they had really good results running the .21 in truggy...but hell i might blow my motor up,not make a jump , get pulled out of the corners ....you never know .......:nod::tire::tire::tire::tire: we shall see .......

yeh mine came with a 4 ...i just dont even trust it after i helped break my buddies in ...and the grp plug wouldnt lite out of the box new ............yeh on the measurments ...the guy who did it only used o.s. and grp plugs ....no other plugs were measured ....so i mean really the other brands havent been measured by a mititoyu drop gauge ....not that they need to ....just saying .....:nod:

can you tell me the exact ignitor that you used? i have raced mr ninjas for around 2 years and i thought that i had a bad plug, but my ignitor wasn't strong enough. i use a hot shot2, burns really hot and works great on mr plugs. seriously, i thought i had a bad one out of the package. i changed the battery in my ignitor to a brand new d cell and it still wouldn't glow, tried a friends hot shot and bingo, it wasn't bad after all.

does anyone know whats a good temp the .28 would run at?
i like to tune to smoke and power but i just want a estimated temp to look for



im only on my second tank and it looks promising:nod: