Novarossi engines thread
#4321
Tech Initiate
Hi
Started running in my pts 21 and noticed after two tanks there is no pinch
I wondering if I got a Pre run engine the piston and sleeve didn't look run
When I had it apart to flush it how can u tell if it's Pre run thanx
Started running in my pts 21 and noticed after two tanks there is no pinch
I wondering if I got a Pre run engine the piston and sleeve didn't look run
When I had it apart to flush it how can u tell if it's Pre run thanx
#4322
Tech Regular
We use the 5 (41615) with the 2660 pipe. At Arcadia, using the Flash .12 PTS, we were getting about 5:30 running hard with plenty of smoke. However, normally the longer header will give you more run time. What engine are you running?
#4323
Tech Regular
#4324
Tech Regular
It says it on the box. Right below 'PTS' it would say 'BREAK IN'
#4325
Tech Elite
iTrader: (36)
This weekend I preped two KEEP-ON .21 for bench running. One of the things that I noticed was the pinch. There is exactly 3mm worth of pinch honed into the sleeve. What I hope this means is less bench running.
#4326
Tech Initiate
Thanx for the replies it didn't have break in
On the box I'll keep going and hope I havn't
Got a dud motor never had a motor like this
Normally a lot of pinch I'll see what happens
Thanx
On the box I'll keep going and hope I havn't
Got a dud motor never had a motor like this
Normally a lot of pinch I'll see what happens
Thanx
#4328
#4330
Re. head clearance Keep On .21s
The stock engine comes with 2x 0.2mm aluminium and 1x 0.1mm brass shims. With all 3 of them used, head clearance is about 0.62mm using the 'solder squish' method. I also noticed the Keep On uses a No.8 plug. Would you recommend removing the 0.1mm shim to make the head clearance closer to the 'generally recommended' 0.5mm ? With a colder plug, I supposed reducing head clearance will advance ignition and make the engine make more lower/mid end power. What are your settings ?
Thanks
The stock engine comes with 2x 0.2mm aluminium and 1x 0.1mm brass shims. With all 3 of them used, head clearance is about 0.62mm using the 'solder squish' method. I also noticed the Keep On uses a No.8 plug. Would you recommend removing the 0.1mm shim to make the head clearance closer to the 'generally recommended' 0.5mm ? With a colder plug, I supposed reducing head clearance will advance ignition and make the engine make more lower/mid end power. What are your settings ?
Thanks
#4331
You can always give it a try and see what it does.
Get a set of shims, in these days Novarossi has also a .15 shim so you can replace the 0.2 for a 0.15 for maybe a better finetuning if removing 0.1mm is too much.
Get a set of shims, in these days Novarossi has also a .15 shim so you can replace the 0.2 for a 0.15 for maybe a better finetuning if removing 0.1mm is too much.
#4332
Re. head clearance Keep On .21s
The stock engine comes with 2x 0.2mm aluminium and 1x 0.1mm brass shims. With all 3 of them used, head clearance is about 0.62mm using the 'solder squish' method. I also noticed the Keep On uses a No.8 plug. Would you recommend removing the 0.1mm shim to make the head clearance closer to the 'generally recommended' 0.5mm ? With a colder plug, I supposed reducing head clearance will advance ignition and make the engine make more lower/mid end power. What are your settings ?
Thanks
The stock engine comes with 2x 0.2mm aluminium and 1x 0.1mm brass shims. With all 3 of them used, head clearance is about 0.62mm using the 'solder squish' method. I also noticed the Keep On uses a No.8 plug. Would you recommend removing the 0.1mm shim to make the head clearance closer to the 'generally recommended' 0.5mm ? With a colder plug, I supposed reducing head clearance will advance ignition and make the engine make more lower/mid end power. What are your settings ?
Thanks
For better bottom end you can just try the 6-fin header.
if you still want to play with head shims, remember that Keep-on .21 is sper long stroke and the correct head shims are the ones with "XL" in the end of product code.
An actual head clearance of 0.50~0.55mm is usually fine, so make sure your engine has 0.62 and you can try to reduce 0.05mm only.
For the plug stay with 8TGH, it works real nice and is a lot more safer to avoid glowplug failures "from nothing" which can be a common and expensive issue when using 7TGF.
Temperature: do not look at temperature, only as reference, due to the had design and depending on track layout and driver skill I have seen those engines running extremely stable at 160ºC.
#4333
Tech Addict
Novarossi Ceramics
Dear all i have heard alot of bad press about novarossi cermics going bad very easily.
I have a .12PT and replaced the ceramic rear bearing after around 8 litres and bearing still looks great. Mind you i threat my engines with great care and i always pre-heat.
I have a .12PT and replaced the ceramic rear bearing after around 8 litres and bearing still looks great. Mind you i threat my engines with great care and i always pre-heat.
#4334
Tech Initiate
How many gallons are needed to make the break-in of 35plus21? After 1 gallon, the engine does not rise of turns and the temperature is too high.
It may be that the engine is not broken yet?
It may be that the engine is not broken yet?
#4335
Hi,
I have a Novarex engine, it late 80's it's a Novarex 350-3port. Can someone help me for a replacement piston and sleeves. Or what model in the current Novarossi engine is suitable replacement for it. i'll post a picture soon.
Thank you all.
I have a Novarex engine, it late 80's it's a Novarex 350-3port. Can someone help me for a replacement piston and sleeves. Or what model in the current Novarossi engine is suitable replacement for it. i'll post a picture soon.
Thank you all.
Last edited by rc10parin; 06-20-2012 at 04:15 PM.