R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road > Onroad Nitro Engine Zone

Reply
 
Thread Tools Search this Thread
Old 06-20-2006, 12:11 PM   #2386
Tech Adept
 
Join Date: Nov 2003
Posts: 209
Default

edward,
you get pm

dieter
4racer is offline   Reply With Quote
Old 07-03-2006, 12:58 PM   #2387
Tech Master
 
ziggy12345's Avatar
 
Join Date: Jun 2003
Location: West Midlands, UK
Posts: 1,596
Default

Hi

I have a new BRB set and put it in the JP T05 crankl case with a T05 crank. I set the head clearance to 0.4mm and used 16% fuel. I am having troble getting the thing to run. It has no bottom end whatsoever and runs like a dog. Has anybody else had problems?

Thanks
__________________
Dedicated RC Car Speed Site

http://www.fast-rc.co.uk/forum/index.php

Sponsored by:
Norfolk and Chance
ziggy12345 is offline   Reply With Quote
Old 07-10-2006, 10:42 AM   #2388
Tech Adept
 
Join Date: Nov 2003
Posts: 209
Default

edgat,
why did you not answer to my pm, please i must have your help

dieter
4racer is offline   Reply With Quote
Old 07-10-2006, 11:07 PM   #2389
Tech Fanatic
 
kitracer's Avatar
 
Join Date: Sep 2001
Location: hong kong
Posts: 986
Default

Quote:
Originally Posted by ziggy12345
Hi

I have a new BRB set and put it in the JP T05 crankl case with a T05 crank. I set the head clearance to 0.4mm and used 16% fuel. I am having troble getting the thing to run. It has no bottom end whatsoever and runs like a dog. Has anybody else had problems?

Thanks
How many tanks have you run it?
What Pipe are you using? Try JP 2620
what car?
what is yr clutch setting?

U can PM me if you like.

tks
Chris
kitracer is offline   Reply With Quote
Old 07-11-2006, 12:09 AM   #2390
Tech Elite
 
razzor's Avatar
 
Join Date: Aug 2005
Location: Durban, South Africa
Posts: 2,810
Default

Ran a practice day this weekend.
Tried the a mugen 2620 pipe with std conical and a long manifold.
Pipe is definately better than the mega 2601 on the top end.
Overall found it to have a broad powerband and I could make 6 mins on a tank.With the Mega I could just make 5 mins.
I did pick up a problem later in the day ,engine kept leaning out.
Looks like the carb took a knock ,kinked the base of carb that goes into crank case.
The carb twisted and the lock that screws through crankcase dented the carb neck.Only explanation for damage.
What carb can I use to replace the std carb???

Running 16% with thin shim supplied with engine and a Mega 6 hot plug.
__________________
Casterracing ZX1.5R
casterracing EX-1 Pro, SP Silver Arrow
TOP Racing Scythe, SP 17.5, SP GT Pro 2.0
TOP Racing Scythe, SP 4.5 V2, Hobbywing Xerun 120SD 2.0
TOP Racing Scythe, SP 13.5, Hobbywing Xerun 120SD 2.0
razzor is offline   Reply With Quote
Old 07-11-2006, 10:17 AM   #2391
Tech Fanatic
 
kitracer's Avatar
 
Join Date: Sep 2001
Location: hong kong
Posts: 986
Default

Quote:
Originally Posted by razzor
Ran a practice day this weekend.
Tried the a mugen 2620 pipe with std conical and a long manifold.
Pipe is definately better than the mega 2601 on the top end.
Overall found it to have a broad powerband and I could make 6 mins on a tank.With the Mega I could just make 5 mins.
I did pick up a problem later in the day ,engine kept leaning out.
Looks like the carb took a knock ,kinked the base of carb that goes into crank case.
The carb twisted and the lock that screws through crankcase dented the carb neck.Only explanation for damage.
What carb can I use to replace the std carb???

Running 16% with thin shim supplied with engine and a Mega 6 hot plug.
We have individual Carb for Sale or if you have Sirio (prefer new 2006 version) or Novarossi's.
Just make sure when you use old carbs, they dont have leak problem because the O rings inside them need replacement in regular bases.
kitracer is offline   Reply With Quote
Old 07-11-2006, 04:57 PM   #2392
Tech Adept
 
Join Date: Sep 2002
Location: Austin, TX
Posts: 246
Trader Rating: 2 (100%+)
Default

Ziggy, I think you're overshimmed for 16% fuel. It should be .3mm or maybe .25mm shim thickness. .4mm is what I run for 30% nitro.
Surge is offline   Reply With Quote
Old 07-11-2006, 06:34 PM   #2393
Tech Fanatic
 
teammpp's Avatar
 
Join Date: Mar 2004
Location: Northern Ireland
Posts: 894
Default

Quote:
Originally Posted by Surge
Ziggy, I think you're overshimmed for 16% fuel. It should be .3mm or maybe .25mm shim thickness. .4mm is what I run for 30% nitro.
In ideal circumstances yes. If I run .3 I end up with serious pitting on the piston. We dont have the same high temps in the UK as you do in the US most of the year. We need to run more shims to get the temp up on the engine. The other factor being altitude. I race at sea level. .4mm is the minimum we get away with.

Its only the latest batch of BRB that is causing problems. Tuning has become really difficult for most people to say the least. Thats just changing the P/L and nothing else so something has been done differently which isnt working in our climate.
teammpp is offline   Reply With Quote
Old 07-12-2006, 01:13 AM   #2394
Tech Master
 
ziggy12345's Avatar
 
Join Date: Jun 2003
Location: West Midlands, UK
Posts: 1,596
Default

Yes I have 4 sets, one piston came apart after running in and the others dont work. Its not that they dont tune, they just dont work
__________________
Dedicated RC Car Speed Site

http://www.fast-rc.co.uk/forum/index.php

Sponsored by:
Norfolk and Chance
ziggy12345 is offline   Reply With Quote
Old 07-13-2006, 11:05 PM   #2395
Tech Initiate
 
Join Date: Sep 2005
Posts: 36
Default Shimming

Quote:
Originally Posted by ziggy12345
Yes I have 4 sets, one piston came apart after running in and the others dont work. Its not that they dont tune, they just dont work
Shim advice Eduard

0.3 will compress to about 0.25 with the alu shim

I also had a piston crack apart while running in and a rod snap at the oil hole.

No reply from edward re- parts.
I have fitted a ZX12 p/l - need to ream pr12 rod for gudgeon pin and about 0.2 undersleeve shim - PR12 head button fits if plug is loose and no shims. Hope to run it soon.
C Mike Hunt is offline   Reply With Quote
Old 07-14-2006, 02:12 AM   #2396
Tech Elite
 
AMGRacer's Avatar
 
Join Date: Oct 2001
Location: Brisbane, Australia
Posts: 3,939
Default

Quote:
Originally Posted by C Mike Hunt
Shim advice Eduard

0.3 will compress to about 0.25 with the alu shim

I also had a piston crack apart while running in and a rod snap at the oil hole.

No reply from edward re- parts.
I have fitted a ZX12 p/l - need to ream pr12 rod for gudgeon pin and about 0.2 undersleeve shim - PR12 head button fits if plug is loose and no shims. Hope to run it soon.
I also had a similar problem with a BRB piston breaking. Edward set it right tho.
AMGRacer is offline   Reply With Quote
Old 07-17-2006, 11:38 AM   #2397
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default

How do you properly break in BRB p/s/r ?

Thanks
__________________
On Road : Xray NT1 , RX8 , T4 || Mugen Seiki MRX4-R , MTX4 , MTX3 prospec || Tamiya M03 , M04 || Top Racing Sabre FD2
Off Road : Xray XT8 || Hobao Hyper 8
Radio : Futaba 3PKS || KO propo EX-10 eurus
asw7576 is offline   Reply With Quote
Old 07-17-2006, 05:56 PM   #2398
Tech Fanatic
 
Speedypeterb's Avatar
 
Join Date: Oct 2002
Location: Pompano Beach FL.
Posts: 775
Trader Rating: 16 (100%+)
Send a message via AIM to Speedypeterb
Default break in

My regular break in is three tanks rich settings at a temp of 180-200 degree f. and then set it on the track for 4 tanks half to three quarter throttle and after tune the low end and work the high end needle to race tune in the next three tanks. talk at you later Peter
__________________
Team Kyosho, Team Epic, IDM Engines, J-Tech racing fuels, Airtronics, Superiorhobbies.com
Speedypeterb is offline   Reply With Quote
Old 07-23-2006, 12:11 AM   #2399
Tech Elite
 
razzor's Avatar
 
Join Date: Aug 2005
Location: Durban, South Africa
Posts: 2,810
Default

shimming under the sleeve ,pros and cons ???
Do you change powerband of engine by doing this ?

Any info and guidelines welcome ?
I am running .45 head clearance at the moment with 16%
What I noticed is that there is no sign of detonation on piston and the plug hasnt distorted but I have seen wear on one side of head button.
Looks like the button has indentation on one side.
__________________
Casterracing ZX1.5R
casterracing EX-1 Pro, SP Silver Arrow
TOP Racing Scythe, SP 17.5, SP GT Pro 2.0
TOP Racing Scythe, SP 4.5 V2, Hobbywing Xerun 120SD 2.0
TOP Racing Scythe, SP 13.5, Hobbywing Xerun 120SD 2.0
razzor is offline   Reply With Quote
Old 07-23-2006, 03:37 AM   #2400
Tech Master
 
ziggy12345's Avatar
 
Join Date: Jun 2003
Location: West Midlands, UK
Posts: 1,596
Default

Under liner shims mover the power band up to give you more top end power. Removing them brings it down. I have given my liner to a machine shop to machine .3mm from under the liner flange so I can adjust the band depending on the track
__________________
Dedicated RC Car Speed Site

http://www.fast-rc.co.uk/forum/index.php

Sponsored by:
Norfolk and Chance
ziggy12345 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Palmaris PR12 .12 1/10 touring car engine boy2rc R/C Items: For Sale/Trade 0 01-29-2007 09:28 AM
Palmaris Racing EdwardN Monster Trucks 0 11-26-2006 08:56 AM
Palmaris Racing EdwardN Electric Off-Road 0 11-26-2006 08:48 AM
Palmaris PS12 engine for sale boy2rc R/C Items: For Sale/Trade 0 08-10-2005 09:05 AM
Palmaris PS12 for sale boy2rc R/C Items: For Sale/Trade 2 03-16-2005 06:15 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:58 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net