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-   -   GRP... Engine... Thread... (https://www.rctech.net/forum/offroad-nitro-engine-forum/211114-grp-engine-thread.html)

tony montana 03-07-2009 06:34 PM

[QUOTE=bherzog513;5521304]

Originally Posted by losi_racer (Post 5520001)
if he didnt then i dont see how they can call them mario rossi tuned motors.

Does Kernal Sanders tune the friars that make your KFC chicken? :)

I've got four gallons on a GRP tuned. I dont race every weekend. After 2 weeks of sitting it was un-tunable today. I began systematically going through the obvious things but the same result concluded. Motor would run good, then go "dumb" rich. I was told by a very knowledgeable person that this is common and it is due to needle o-rings(idle and high).

Motor has ran for a couple weeks at 2.5-3.25 out on the high speed needle with the bottom as lean as I could get it. The motor wouldnt run until I leaned the top. Is everyone throwing their motors away once this happens, because I havn't seen anything resorting to these problems here, I hear of the mystery flame, but no fix other than buying another brand of engine? If I set the engine's needles as losi claims, it wont run at all, after four gallons. I wish Drake Would respond to my "real world" totall screwed situation.

(MOTOR HAS TONS OF PINCH)


My question to the board is, are their any mentions of any of this, here?

Mine did something like this. During a long main mine just richend up alot. Come to find out it had a airleak. It was leaking around the fuel nipple. make sure that is tight

njballa 03-07-2009 07:55 PM

bherzog513 you asked:
"Does Kernal Sanders tune the friars that make your KFC chicken? :)"


But does anyone at KFC know the actual "Recipe" NOPER its a Secret actually there was a article about it recently as it need to be moved from one vault to a newer vault.... They had major security !!!!

So with out the 11 herbs and spices can't call them "Mario Rossi Tuned" it would only be called Fried Chicken :lol:

rawdawgga 03-07-2009 08:00 PM


Originally Posted by losi_racer (Post 5522938)
i dont own a .28 but i used the .21 in my truggy(its mainly in the buggy) and the 053 was a great match, i got 12 min run time

Hey losi is that the non tuned version?

losi_racer 03-07-2009 09:00 PM


Originally Posted by rawdawgga (Post 5523698)
Hey losi is that the non tuned version?

nope

jldjlaudio 03-07-2009 09:10 PM

In a 8t whats better a grp 21 or grp 28?

Alan D. 03-07-2009 09:14 PM

you will almost never need a .28

jldjlaudio 03-07-2009 09:29 PM

Is this the right one he should get? He's going to get whatever he buys, powerhouse modded! http://www.amainhobbies.com/product_...ducts_id/26092

losi_racer 03-07-2009 10:37 PM


Originally Posted by jldjlaudio (Post 5523877)
In a 8t whats better a grp 21 or grp 28?

a .21 is more then enough power. dont judge it till after its first gallon tho, my dad hates his grp right now but it only has 1/2 a gallon, mine has about 1.5 gallons on it and he loves mine. these engines take a while to break n

air8 03-08-2009 12:54 AM

A buddy told me these engines sort of perfer a certain type of fuel. Are you guys seeing this as well? Any particular brand work better than the next? I'd like to keep using Gen 2 like I use in all my other engines if possible. I don't like the idea of needing to pack two different types of fuel, ya know?

jay568424 03-08-2009 01:56 AM

Good Bye Tuned GRP?
 
The GRP engine was very very good engine specialy the tuned one, and now, the guy Mario Rossi leave the company, will the engine will stay the same as the tuned one?

Sad News

http://www.neobuggy.net/modules/news...p?storyid=5785

Bigedmond 03-08-2009 08:16 AM


Originally Posted by air8 (Post 5524348)
A buddy told me these engines sort of perfer a certain type of fuel. Are you guys seeing this as well? Any particular brand work better than the next? I'd like to keep using Gen 2 like I use in all my other engines if possible. I don't like the idea of needing to pack two different types of fuel, ya know?

that is not true at all. At my track, we have 1 with 9 gallons on it. It has been on 20%, 25%, and now 30%. Along with that, it went from odonnels, to nitrothane to byrons gen 2.

All of my GRPs run Byrons Gen 2, 30%. no tuning issues.

itsshemp 03-08-2009 09:23 AM


Originally Posted by Bigedmond (Post 5524986)
that is not true at all. At my track, we have 1 with 9 gallons on it. It has been on 20%, 25%, and now 30%. Along with that, it went from odonnels, to nitrothane to byrons gen 2.

All of my GRPs run Byrons Gen 2, 30%. no tuning issues.

+1:nod:

My GRP (tuned) went 9+ gallons as well. It was still going until something scared the piston. I ran mine on Nitrotane, and mostly Gen2. This is by far (IMO) one of the best engines out there. It does take some time to break in fully (1+ gallons), but once it does, it has tons of power, and runs like a champ! Even after each gallon, it really never declined in performance.

Sad to see that Rossi has left the Co. Hopefully this will not be the end of the Tuned version of this engine, or of them at all. That would be BAD!

I ordered the non-tuned, to see how it runs, and to use as a back-up. I hope it runs pretty close to the tuned. I dont expect it to be just as good. We will see.

zixxer 03-08-2009 09:30 AM


Originally Posted by air8 (Post 5524348)
A buddy told me these engines sort of perfer a certain type of fuel. Are you guys seeing this as well? Any particular brand work better than the next? I'd like to keep using Gen 2 like I use in all my other engines if possible. I don't like the idea of needing to pack two different types of fuel, ya know?

no and +1 on what others said i am running byrons30% gen2 ...works perfect and head temps after mains are 160-170 maybe 190 after long mains ...

yaright 03-08-2009 09:48 AM

Does any one know the base needel settings

zixxer 03-08-2009 09:51 AM


Originally Posted by yaright (Post 5525237)
Does any one know the base needel settings

LSN = 6.25 TURNS OUT FROM BOTTOM
HSN= 3.5 TURNS OUT FROM BOTTOM
IDLE GAP = 1-1.28MM

yaright 03-08-2009 10:02 AM

Thanks zixxer had a blast at Nitro Fever yesterday even though I couldn't get my truck off pit row:lol:

spudly12 03-08-2009 10:33 AM

hi there i have been offered a realy good deal on the sport promo kit 21 version can anyone tell me what plugs to use they are the standard plugs .also how do these motors compare against the ws7111
cheers inadvance

air8 03-08-2009 11:26 AM

Ok. Thanx for clearing that up guys.

losi_racer 03-08-2009 11:57 AM


Originally Posted by spudly12 (Post 5525364)
hi there i have been offered a realy good deal on the sport promo kit 21 version can anyone tell me what plugs to use they are the standard plugs .also how do these motors compare against the ws7111
cheers inadvance

yes, they use standard, idk what engine the ws7111 is, i never heard of it so i cant say

zixxer 03-08-2009 12:06 PM


Originally Posted by yaright (Post 5525278)
Thanks zixxer had a blast at Nitro Fever yesterday even though I couldn't get my truck off pit row:lol:

awesome man so glad yall came out ..it was a pretty good turn out for their season opener ...we hope to have yall back really soon ...let us know of any good racing yalls way and we will try to make it as well ...later

John Schafer 03-08-2009 12:27 PM


Originally Posted by spudly12 (Post 5525364)
hi there i have been offered a realy good deal on the sport promo kit 21 version can anyone tell me what plugs to use they are the standard plugs .also how do these motors compare against the ws7111
cheers inadvance

The RB WS7-III will have way better top end preformance, and the GRP will be better on the bottom end. Both engines will last for several gallons and fuel milage may be a little better with the GRP.

tallyram 03-08-2009 02:44 PM

has anyone ran the tuned version with sidewinder worlds blend? i have a friend with that combo and we can't seem to get it tuned in. i run a mr ninja and it tunes wonderful, but his just will not tune in to sidewinder. it wants to run 200* and makes "o.k." power. we both run rc8's so i guess it could be a fuel tank issue. this is his third tuned grp and he's on his 4th or 5th fuel tank. just trying to rule out the fuel.

losi_racer 03-08-2009 02:49 PM


Originally Posted by tallyram (Post 5525960)
has anyone ran the tuned version with sidewinder worlds blend? i have a friend with that combo and we can't seem to get it tuned in. i run a mr ninja and it tunes wonderful, but his just will not tune in to sidewinder. it wants to run 200* and makes "o.k." power. we both run rc8's so i guess it could be a fuel tank issue. this is his third tuned grp and he's on his 4th or 5th fuel tank. just trying to rule out the fuel.

thats the set up i run... grps dont make power until about the gallon mark. the temp range is 160-200. if its in this range your safe.

freeman 03-08-2009 02:54 PM

Could someone tell me what the noise is coming from my GRP tuned. At idle it does not do it but at mid to full throttle then back down to idle there is a ratteling like sound. Almost like the rod is touching the block going up then back down. Checked everything and no rubbing of the rod. BTW the engine runs perfect stays tuned in everyway.

zixxer 03-08-2009 03:11 PM


Originally Posted by tallyram (Post 5525960)
has anyone ran the tuned version with sidewinder worlds blend? i have a friend with that combo and we can't seem to get it tuned in. i run a mr ninja and it tunes wonderful, but his just will not tune in to sidewinder. it wants to run 200* and makes "o.k." power. we both run rc8's so i guess it could be a fuel tank issue. this is his third tuned grp and he's on his 4th or 5th fuel tank. just trying to rule out the fuel.

if you run rc8's and have not swapped the tank over to an xray 808 tank you are asking for trouble ...my buddy jyzf destroyed a grp because of associateds in ablilty to fix their gas tank issues ..that and all the 808 tanks were back ordered because everyone running an associated bought one :lol:

white48rc 03-08-2009 03:38 PM

[QUOTE=bherzog513;5521304]

Originally Posted by losi_racer (Post 5520001)
if he didnt then i dont see how they can call them mario rossi tuned motors.

Does Kernal Sanders tune the friars that make your KFC chicken? :)

I've got four gallons on a GRP tuned. I dont race every weekend. After 2 weeks of sitting it was un-tunable today. I began systematically going through the obvious things but the same result concluded. Motor would run good, then go "dumb" rich. I was told by a very knowledgeable person that this is common and it is due to needle o-rings(idle and high).

Motor has ran for a couple weeks at 2.5-3.25 out on the high speed needle with the bottom as lean as I could get it. The motor wouldnt run until I leaned the top. Is everyone throwing their motors away once this happens, because I havn't seen anything resorting to these problems here, I hear of the mystery flame, but no fix other than buying another brand of engine? If I set the engine's needles as losi claims, it wont run at all, after four gallons. I wish Drake Would respond to my "real world" totall screwed situation.

(MOTOR HAS TONS OF PINCH)


My question to the board is, are their any mentions of any of this, here?

Bill,The 3 Grp that i got all have went stupid fat at the 3 gallon mark.It has happen to me in practice over the weekend and the motor has no more then 3 gallons on it.I was running it in practice and it was fine and i handed the controller over to Hudson he ran about 5 laps and it was fine, then he handed it back to me and it was so fat that it wouldn't even pull itself around the track.It happen that fast,so just lean it out its fine. my motor never ghost flamed on me i have ran these motor for a year every weekend and they never have let me down. Jason White

Frank L 03-08-2009 06:03 PM


Originally Posted by tallyram (Post 5525960)
has anyone ran the tuned version with sidewinder worlds blend? i have a friend with that combo and we can't seem to get it tuned in. i run a mr ninja and it tunes wonderful, but his just will not tune in to sidewinder. it wants to run 200* and makes "o.k." power. we both run rc8's so i guess it could be a fuel tank issue. this is his third tuned grp and he's on his 4th or 5th fuel tank. just trying to rule out the fuel.

I have only used sidewinder 30% in my .21 tuned and no problems besides the ones I create by twisting on the needles too much. Sidewinder does run a little hotter 10-15 degrees but 7+ gallons on the tuned and no problems. You may have a bad gallon of fuel it happens sometimes to any type of fuel.

Frank L 03-08-2009 06:09 PM


Originally Posted by freeman (Post 5525993)
Could someone tell me what the noise is coming from my GRP tuned. At idle it does not do it but at mid to full throttle then back down to idle there is a ratteling like sound. Almost like the rod is touching the block going up then back down. Checked everything and no rubbing of the rod. BTW the engine runs perfect stays tuned in everyway.

If you are running the FLS type pipe system check the o-rings that seal the header to the pipe. I had them leak and make my .21 tuned sound very loud. It took a very cold day to see the exhaust escaping out the FLS fitting.

freeman 03-08-2009 06:44 PM


Originally Posted by Frank L (Post 5526652)
If you are running the FLS type pipe system check the o-rings that seal the header to the pipe. I had them leak and make my .21 tuned sound very loud. It took a very cold day to see the exhaust escaping out the FLS fitting.

Thanks for the reply, I did notice the o-rings are very hard and dry. Will replace with new ones. Again thanks

rc-mike 03-08-2009 10:47 PM

I just got a tuned .21 and so far it seems like it is going to be a great engine. Only downside so far is the 8ight 2.0 I got for it to go in came with this nifty 4 way wrench and I decided I would take out the glow plug and check it before I started it and it was so tight it stripped the wrench. :weird: I got it out with another wrench so all it well (well, besides messing up my brand new wrench.)

losi_racer 03-09-2009 12:19 AM


Originally Posted by Frank L (Post 5526627)
I have only used sidewinder 30% in my .21 tuned and no problems besides the ones I create by twisting on the needles too much. Sidewinder does run a little hotter 10-15 degrees but 7+ gallons on the tuned and no problems. You may have a bad gallon of fuel it happens sometimes to any type of fuel.


i havent seen this issue with sidewinder. my engines run the same temps as others

SupermaxxRich 03-09-2009 09:05 AM


Originally Posted by losi_racer (Post 5528151)
i havent seen this issue with sidewinder. my engines run the same temps as others

all depends wich Sidewinder you run or fuel for that matter. Fuel that has more oil in it tends to run a little hotter.....

If you outside temps are 80+ and you have a GRP that is still around the 1/2 gallon mark don't be affraid if it hits 200-220. Mine was running right around those temps at the Nitro Challenge and it was 90 degrees outside. After a couple more qualifiers temps started dropping and my engine was running around 180-190.

Just ran my engine again this weekend, and its starting to break in, its making a little more power and it was temping about 150-160 but outside temps were in the 40's.

If your past 1 gallon you shouldn't see temps over 200.

tallyram 03-09-2009 09:23 AM

my friends tuned has 2-3 gallons through it. i can hear and feel that its lean, the temps just confirm this. i think he must have some tank issues! after this being his 3rd grp that will not tune and is probably going to burn up, he is not a fan. i keep trying to tell and show him otherwise! i have minimal trouble out of my mario rossi engines!

ABURTON 03-09-2009 10:43 AM

Hey guys, just got this in a email. Get the grp tuned for about $260...


March Engine Sale - Get a New Engine!
There are a number of new engines for 2009 - including the new O.S. V-Spec II Worlds, EB Mods Go 5-port, Novarossi Plus 21-4, and more! As a result, we have many of our current engines on sale at killer deals!

Engines on Sale:

> GRP .21 Mario Rossi Tuned Engine
> GRP .21 Engine
> Ninja JX .21 B01 Engine
> Novarossi P5XS Hot Mod Modified Engine
> Novarossi Plus 21-5K

New Engines:

> O.S. V-Spec II .21 Worlds Turbo Race Engine
> Go Tech .21 5 Port EB Mods Race Prepped Engine
> Go Tech .21 5 Port EB Mods Fully Modified Engine

Save Up to $75 in March!
To save up to $75 on your next order, enter the following discount code into your shopping cart before checking out.

Order Amount:You Save:Discount Code:
$75.00 - 149.99 $5.00RCMAR95
$150.00 - 249.99 $12.50RCMAR912
$250.00 - 799.99 $25.00RCMAR925
$800.00 +$75.00 RCMAR975


These discounts are good through March 31, 2009, and may not be applied to orders that have already been submitted. The codes may be used for online orders, phone orders, and in-store orders.

losi_racer 03-09-2009 12:39 PM


Originally Posted by SupermaxxRich (Post 5529241)
all depends wich Sidewinder you run or fuel for that matter. Fuel that has more oil in it tends to run a little hotter.....

If you outside temps are 80+ and you have a GRP that is still around the 1/2 gallon mark don't be affraid if it hits 200-220. Mine was running right around those temps at the Nitro Challenge and it was 90 degrees outside. After a couple more qualifiers temps started dropping and my engine was running around 180-190.

Just ran my engine again this weekend, and its starting to break in, its making a little more power and it was temping about 150-160 but outside temps were in the 40's.

If your past 1 gallon you shouldn't see temps over 200.


your lucky you dont live in az... if the n.c was in july it would be 115 :(


but i see what you mean on the new engine. my grp has like 2 gallons or so on it and it runs at 160-165 all day but my dad has maybe 1/2 a gallon and his runs at 220-225.i didnt know what to do and so we took it to mike thrue and he tuned it, he actually leaned it out a tiny bit more and said dont worry about temps, power, or fuel consumsion till after the gallon mark

SupermaxxRich 03-09-2009 12:54 PM

Exactly:nod:

[email protected] 03-09-2009 05:42 PM

Hey I know a bunch of guys recommend the dynamite 053 pipe for the non tuned engine but will any of these come even close to its performance. Jp3, sportwerks 053, os 2060, or a jp1? I can get good deals on these, also I have a dynamite 086 so would any of those pipes be better than the 086 on the non tuned version?

drs92 03-09-2009 08:30 PM

How is the non-tuned version of these GRP's? the one with silver head, can anyone tell me how it would do in a truggy? Or is the jpx .21 a better chioce/ extech .21

jldjlaudio 03-09-2009 08:40 PM


Originally Posted by derek_18mt (Post 5532021)
How is the non-tuned version of these GRP's? the one with silver head, can anyone tell me how it would do in a truggy? Or is the jpx .21 a better chioce/ extech .21

I was wondering the same thing with those same motors.. I was also wondering about the extech 24 or the GRP 28.

losi_racer 03-09-2009 09:05 PM


Originally Posted by jldjlaudio (Post 5532072)
I was wondering the same thing with those same motors.. I was also wondering about the extech 24 or the GRP 28.

the tuned and non tuned grps are good. ive never owned a non tuned but i heard many good things.


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