the 053 is the one you will want to run :nod:

What is the manufacture of these pipes?

Dynamite.

I was having a torque issue with a tuned .21 in my truggy with a dyn 053 pipe. mid was great and top end was not bad, but the low end suffered a little bit. I installed a long RB header and what a difference. I used a long header when I used to run the stock GRP 2053 pipe and that seemed to help it too. The long header and a 053 pipe work great for me in a truggy.

Who makes the long header? What part number? What about the Ofna pipes?

The GRP 2053 pipe is the best pipe. I have not seen any Ofna pipe work well with this engine yet.

hey guys figured i would ask but idk if anyone will know for sure since ive had many people look at this even sponsored pro drivers..


my grp has like 3 maybe 3.5 gallons, i broke it in right, i took it easy for the first gallon, then about 1.5 gallons i lost a lot of pinch idk why, it never got over 190. then at the nitro challenge in az i was having problems like no other. temps would not go lower then 220 and i was runnin rich. i had mike thrue look at it and he couldnt even give me an answer. so i checked for air leaks none, took the head off, the piston looked perfect. the weekend after the challenge i went to a p4 plug, my temps dropped back down to 170-190 but im still running rich. im not getting all the power i should be gettin out of the grp but im still making the jumps so its not like its so rich its effecting the performance a lot but i had to have a run at jumps to clear them.

last night was a club race. same story, i tried leaning it out but didnt help it would shoot my temps up to 230 if i leaned it out and it would still be rich.Im only getting 6 min FLAT out of a tank. we had 6 min qualifers and i had to leave the pit at the last sec to make it, i actually ran out of fuel on the second qualifer.

so the main comes, its a 20 min main no big deal i would just pit 3 times. i richened it up because the temps started to drop and i didnt wanna over heat. temps were fine in practice. i knew i was running hot during the main i could just fill it, i had a good amount of smoke but i just had the feeling. i had great power, the power a grp should have. i took it off after the 20 min and temped it and i was at 260.


whats the deal with this grp? i have some pinch left, not where it should be at with the amount of fuel that has gone thru it but there is some. im not having issues with it shutting off, the temp seems to be consistent except for last night.

should i just junk this and get a new engine(not grp) or what...... ive always checked temps last night was the first time its over heated...... it seems like it will run good at 240ish but i dont wanna try it. i dont tune by temp but i know where these engines are supposed to run and this just has me worried.....


and please, i dont wanna hear that these engines run at 225 and not to run them at 160-190. if thats what you gotta say please keep it to your self. ive done my homework on these engines and i dont wanna get into an argument about something like that.

thanks in advance,

Losi Racer

anybody know where i can purchase a new con rod for the tuned .21 online...

can't find one at the places i know

thanks

i would check the front bearing. have a friend that swears he got 3 grp engines with leaky front bearings and i saw the results, 230* to make good power, but engine lost compression around 2 gallons. these engines aren't supposed to run that hot!

how do you check the front bearing????

I've read that if you spray carb cleaner at the front bearing while the motor is running and the motor shuts off then the bearing is leaking.

um....... how do you start it if you take the flywheel off to check the bearing lol

Hey guys,

I was running my grp non-tuned yesterday in an ambient temp of 70 degrees. It has just under a gallon and was running nice and rich with good smoke on th bottom and a good trail on the top and the temps were at right around 210 when I brought it in the first few times. Then after about 7 minutes I brought it in and the tank was low, I took the temo and it was at about 230? Do the temps get higher when the tank gts low or do I have a problem?

Your good. Leans out as it runs dry. (or run dry like I do :sweat:)

Check your temp gauge lately? I ran into a guy last year that couldnt get his to run right. We compared temp gauges and found his off by 40 degrees. Tuned it to my gauge and it ran great.

Where do you get those? I checked Stormer but they didnt list it.

http://www.amainhobbies.com/product_...ducts_id/23789

http://www.amainhobbies.com/product_...ducts_id/23790

my dad uses it everyday for a/c, and we dont have issues with our other engines. his grp has ran hot as well but we had thrue temp his. but he said not to worry because his is so new. his temps are droppin a little as more fuel gets thru his

My new GRP is doing that too. Check the clutch I had a heat prob a few weeks ago and changes the clutches and then temps that were at 230's down to 175 but then this weekend temps in the 220's and then in the main it came in at 205 after 20 mins of hard running. As long as there is good smoke throughout all ranges I dont worry about it. The front bearing is defiantly a weak spot. I had one go bad under a gal and the other GRP I run has over a gal on it but I know soon it will go bad. Install TKO's and forget about the front bearing. Did you seal the carb and back plate? and how easy do the low, high and idle screws turn. If they turn easy then the carb needs an o-ring kit. The o-rings in this engine dont last too long, I have seen fuel come out of the HSN because the o-rings were bad. I always carry spare o-rings.

http://carolinasrc.com/Webstore/Scri...idproduct=8868

http://carolinasrc.com/Webstore/Scri...idproduct=8970

geeze. $11 for 5 tiny o rings. :rolleyes:

Broke in my new .21 Tuned, did the heat cycle, now here comes the fun part, was trying to get it tuned, and ran into my first problem, when going to full throttle I get this bog (for lack of another name) the engines sounds like a deep "BOAAAAAAAAAAAAAA" then a couple of seconds later clears out, tried leaning the bottom, richening the bottom, leaning the top, richening the top and nothing....any ideas, I'm going back to stock settings, but I'm kind of lost on how to tune, I've read that you first set the LSN then the HSN so it just clears out, spoke with some other guys that run same engine and told me to tune like any other, first HSN then LSN.....any help much appreciated!!!!

With this engine when in doubt lean it out. I had one GRP that sounded lean at idle and sounded like a lean bog at full throttle like you are describing and I leaned it out a lot like 1/2 turn on top and bottom and then all of a sudden it came alive. Tunning on this engine is different from most. So I lean it out till I know its lean and then richen it back up. The last GRP I ordered from powerhouseperformance and I had powerhouse do the heat cycle. This was done in NY at 20 degree ambient temps. When I got the engine I tuned it in 60 degree ambient temp and I had to lean it out a good 1/2 to 3/4 turn on the bottom and 1/4 on the top. Ran like a champ then. Try leaning it till you know its lean and then richen it back up. If you get lost you can always start over at factory settings. Dont give up you will get it and when you do you will be very happy.

to lean on top to rich on bottom:nod:gets my vote every time because youve tuned it like other motors ...like the guys at the track said ...only problem is they dont tune like other motors:lol:you will get it and like frank said when you do ...its golden

Thanks guys for the help!! Actually it was to lean on the bottom and too rich on top, I'm loving it!!! Can't wait to get it to the track!!

Thanks Alan B., this guy rocks!!! Helped me over the phone!!!!

Alan, have u tried the Losi R10 pipe with a GRP Tuned 21?? What restrictor would you recomend for 8T 2.0 ??

The 7 is perfect I put the 8 in looking for a little bit more torque and my runtime dropped significantly to out of gas at 8:30. I usually get around 10 min or so. I am running a dyn 053 pipe with a RB long header. The long header really helps out the torque in the truggy.

Great thanks Frank, how does the 053 compare to the JP3? Or the R10?

its not the clutch. ive replaced the clutch twice since having it.....

i checked for air leaks and found nothing, there isnt fuel on the bottom of the block after runnin so i dont think the bearing bad. and the needles are tight. im just going to lean it out and have it run around 240(guessin this will be where it at) there was tons of smoke at 268 last saturday but thats to hot..... if it blows it blows. im tired of dealin with this engine. my pinch is prob close to being gone soon(maybe 2 more gallons) and it has like 3 on it so o well no more grp for me

Funny question losi_racer....have you ever cleaned the tip of your temp gun ? ive found a little layer of grunge on the "eye" every once in a while and can cause Extreme differences in temp...like a normal running motor temps at 275+ when the motor IS NOT 275...and once you clean it whamo 210-220 like its supposed to be...i have a specific paint brush i use for cleaning the Tip's of my guns that i keep in a Zip loc in the pit box. :nod:

LOL. I've had that happen before. Luckily I caught it before I started twisting needles. Mine was reading below 100deg F everytime I checked the temp.

Some brand's will go Up...some will go down......my Duratrash back in the day went down like your's.....my OD and HPI went up....crazyness i tells ya. :lol:

Will a mccoy #8 work in a non tuned GRP .21 motor? Also, i made the mistake of pulling out the lsn tonight and didn't get the amount of turns out from bottom before doing so. I have search and found different suggestions on where the factory setting is, but cant figure out what it is suppose to be. Is it 5.5 or 6.5 turns out?

Thanks in advance
Bryon

I'm not sure of how many turns out but the manual says .045" in from flush.

6.5 turns out from bottom

opps and ya the mccoy 8 will work fine ...it takes a long standard plug ....so like o.s. plugs will work but give you less compression ...stick with the mccoy , or the odonells ....nova rossi plugs will work also ......

E shop
 

Anyone know anything about the eshop that they were opening up have not seen anything.As they were releasing a new carb for the engines

not yet when someone finds it post it up

hey guys just a quick question. Today I wasrunning my grp non-tuned out with an ambient temp of about 75 to 80. So I got out and my engine was really rich when I started and assumed it was my engine breaking in a little because its got just around a gallon on it. Then It leaned it until it ran well with a good amount of smoke. I temped it and it was at 225 so I thought it wouldnt hurt to richen the lsn and the hsn just a small turn(about 1/6). I did his and it literally was rich to the point were it bogged and cut out. Are these engines that sensitive or is that not normal?