Novarossi Ielasi Tuned Engines - Official Thread
#31
Pipe combo
All depends on tracks were here in the states tons of hair pin turns & tracksize varies we have 2 large tracks Kissimmee 255ft straight leading into sweeper 80ft
Homestead Miami 300ft leading into 50ft sweeper both tracks large gearing
The track I tested a bit shorter gearing 19,24 57,61
All depends on tracks were here in the states tons of hair pin turns & tracksize varies we have 2 large tracks Kissimmee 255ft straight leading into sweeper 80ft
Homestead Miami 300ft leading into 50ft sweeper both tracks large gearing
The track I tested a bit shorter gearing 19,24 57,61
#32
Running the Ielasi tuned in a Mugen MRX5-WC, gearing 16/20 on 50/46 and as fuel Runnertime TOP-16. Exaust: JP Racing 2031 with the Novarossi short conical manifold which I believe is the best exhaust system for Novarossi (based) engines.
The engine had a 4 hour break in in my heated oil bath bench and needed about 1.5 tank on the track to go on sharp. With small size tires (74/68) the engine comes to life and is one of the fastest on the straight. Also on low and midrange parts the engine has a powerfull but still smooth control even when knowing about the very high timings.
On full size tires (77/70) you will notice the engine looses some power but is still able to withstand the competition.
After 1.5 liter driving the pinch is still there which tells me a better material piston is used. I am very pleased with this engine although it has no 5 min milage!
The engine had a 4 hour break in in my heated oil bath bench and needed about 1.5 tank on the track to go on sharp. With small size tires (74/68) the engine comes to life and is one of the fastest on the straight. Also on low and midrange parts the engine has a powerfull but still smooth control even when knowing about the very high timings.
On full size tires (77/70) you will notice the engine looses some power but is still able to withstand the competition.
After 1.5 liter driving the pinch is still there which tells me a better material piston is used. I am very pleased with this engine although it has no 5 min milage!
Last edited by Roelof; 05-07-2016 at 02:42 PM.
#33
Engine choice
Roelof you have pm
#34
Tech Adept
Roelof,
Silly question, your engines in the photo are ITD.21-9CL WC EDITION and look to have a black case, but the photos on Ielasi's website show its silver. Is it just the photo, or am I looking at the wrong one?
Silly question, your engines in the photo are ITD.21-9CL WC EDITION and look to have a black case, but the photos on Ielasi's website show its silver. Is it just the photo, or am I looking at the wrong one?
#35
Tech Adept
Also you wrote the engine is not a 5min engine? Have you fixed this?
#36
It is a silver crankcase.
I did not take the time to find out how to reach 5minutes. James does get 5 minutes and I know he is using a 2015 exhaust. I have a 2015 so I can give it a try but I am pretty sure I sill will not reach 5 minutes.
With all my previous engines I was already used to make extra fuel stops so I live with it.
I did not take the time to find out how to reach 5minutes. James does get 5 minutes and I know he is using a 2015 exhaust. I have a 2015 so I can give it a try but I am pretty sure I sill will not reach 5 minutes.
With all my previous engines I was already used to make extra fuel stops so I live with it.
#37
Last weekend it was time to replace the rod, with some fresh R7's in my stock I placed a R7 rod.
In 2 pics the difference between the smaller R4 and the larger/heavy R7
The R4 rod had about 5.5 liter use with a no hard break in because my heated oil bath break in bench.
Also a pic of the piston after the 5.5 liter, last weekend driven a lot, is now at almost 8 liter of use and still a lot of pinch. I must admit I pre-heat my engine always befor the start. I use Runnertime top16 fuel.
I also found some milage....
James told me the engine needs to be at least 130 degrees to come alive and indeed @ 135-140 degrees celcius the engine is running at its best. together with a leaner setting on the LSN I managed to run 4:50 easy with still a drop in the tank. 5:00 is possibe but no 5:20 if I run a long heat.
In 2 pics the difference between the smaller R4 and the larger/heavy R7
The R4 rod had about 5.5 liter use with a no hard break in because my heated oil bath break in bench.
Also a pic of the piston after the 5.5 liter, last weekend driven a lot, is now at almost 8 liter of use and still a lot of pinch. I must admit I pre-heat my engine always befor the start. I use Runnertime top16 fuel.
I also found some milage....
James told me the engine needs to be at least 130 degrees to come alive and indeed @ 135-140 degrees celcius the engine is running at its best. together with a leaner setting on the LSN I managed to run 4:50 easy with still a drop in the tank. 5:00 is possibe but no 5:20 if I run a long heat.
#38
I have the .12 Ielasi Tuned and raced it at last year's biggest race. With the right pipe (tried several but the efra 2669 was by far best) it has great full range acceleration and top speed.
I had a previous Nova Flash PT that was tuned by Ielasi which was also excellent.
There is nothing wrong with a normal/stock tuned Nova's, but the Ielasi just seem to be a bit faster in terms of my lap times.
All engines seem very fast these days (once I find the right carb and clutch setting and gearing). Just takes a lot or trying and testing things with an eye on lap times more than on how it feels. Often my fastest laps don't feel like fastest laps.
I had a previous Nova Flash PT that was tuned by Ielasi which was also excellent.
There is nothing wrong with a normal/stock tuned Nova's, but the Ielasi just seem to be a bit faster in terms of my lap times.
All engines seem very fast these days (once I find the right carb and clutch setting and gearing). Just takes a lot or trying and testing things with an eye on lap times more than on how it feels. Often my fastest laps don't feel like fastest laps.
#40
#41
#42
That buttonhead has got a really large squish band... much larger than other novas I think... interesting
#43
Some updates....
I have found 5 minutes runtime. After some tests with the 2031 exhaust I could reach 4:50 on a tank. Changed the pipe to a 2015 with the 6 fin header and added some volume to my tank, it seemed a few cc to small and now I can reach 5:15 easy.
My 1st engine has about 13 liter use and now the main bearing seems to be failing. Meanwhile I have changed the rod twice and have used a R7 instead of a R4. No performance issues with that.
I started to use my 2nd engine because the 1st needed a rod replacement and I had no time for it. The performance, milage and temperature is exactly the same as my 1st one. Sadly in the 1st race at the end of a final it started to rain and I had to drive on. The engine had seen 10 minuts of rain and afterwards the standard procedure to let it idle for a while and stop th engine by dripping some afterrun into the carburator. A week later with a start the bearing was noisy and with an inspection it had lots of rust.
This explains why I can run longer on a bearing than I am used to be, bearings that rust less fast have softer races.
I changed the bearing for a normal steel one (#16800) and again no performance issues.
The performance of my 9CL is noticed and some people have bought one as well and are very satisfied with it. One guy copied the timings into an ISON21 and that one is performing the same. (the base of the 9CL seems to be an ISON21)
I have found 5 minutes runtime. After some tests with the 2031 exhaust I could reach 4:50 on a tank. Changed the pipe to a 2015 with the 6 fin header and added some volume to my tank, it seemed a few cc to small and now I can reach 5:15 easy.
My 1st engine has about 13 liter use and now the main bearing seems to be failing. Meanwhile I have changed the rod twice and have used a R7 instead of a R4. No performance issues with that.
I started to use my 2nd engine because the 1st needed a rod replacement and I had no time for it. The performance, milage and temperature is exactly the same as my 1st one. Sadly in the 1st race at the end of a final it started to rain and I had to drive on. The engine had seen 10 minuts of rain and afterwards the standard procedure to let it idle for a while and stop th engine by dripping some afterrun into the carburator. A week later with a start the bearing was noisy and with an inspection it had lots of rust.
This explains why I can run longer on a bearing than I am used to be, bearings that rust less fast have softer races.
I changed the bearing for a normal steel one (#16800) and again no performance issues.
The performance of my 9CL is noticed and some people have bought one as well and are very satisfied with it. One guy copied the timings into an ISON21 and that one is performing the same. (the base of the 9CL seems to be an ISON21)
#45
Tech Regular
how should I shim if I use 25% nitro? The engine I have is 9CL-WC.
Thank you.
Thank you.