Need some help

[racer-dom]

I got my K8T running but I had to strip the carbie all the way down as there was a lot of metal shavings in there after I did that I realized that I did not check the setting on the mid level needle and now I do not know where to set it I am able to run the car but I am running it very rich until I get this sorted out. Could someone either tell me the gap between the low end needle and the high end needle when the low end is flush with the brass surface and throttle is at full or the amount of turns out I need.
Can someone please help me I feel as if I have buggered my carbie now as this setting seems to be very important.
Oh and it the stock force 25.

[racer-dom]

Please guys really need to know what to set the mid range at.

[Mr Fusion]

I have no idea... but I'm sure the guys that do know, will be here to help.

[hakmazter]

I wish I knew more about it to feel I can answer, but I have read a million posts here about tuning, etc.... Have you done a search?

I'm going out to the garage to plug in my batteries.....

[bc24fl]

I'm going out to the garage to plug in my batteries.....

:&!@ that's so wrong!

[bc24fl]

racer-dom... maybe this link will help ya out.

http://www.ofna.com/pdf/eng-force25.pdf

[racer-dom]

racer-dom... maybe this link will help ya out.

http://www.ofna.com/pdf/eng-force25.pdf

No not at all really but thanks I have all off those set but the mid range needle is the one that is out, well I think that it is. The car was running really revy so I changed the settings around a bit and after a while it all came out quite well the car is reaching max rpm and not over heating and the pick up is good so I am just going to leave it alone. I do not race these cars they are just for my enjoyment so it does not have to be perfect but the more performance that I can get out of them and keeping reliability the better.

In saying all that I hope that there is someone out there that can help me with this as I think that it is good to know all the settings on the car.

[racer-dom]

I wish I knew more about it to feel I can answer, but I have read a million posts here about tuning, etc.... Have you done a search?

I'm going out to the garage to plug in my batteries.....

Yeah did a search and came up with nothing on that particular subject but there is a tone of great information on this site.
Thanks for the advice.

[razzor]

I have a 25 in stock, ill get settings from there.
Back in a few minutes

[razzor]

OK

HSN is 4 1/2 turns from close
LSN is 3 3/4 turns from closed
There is no mid range needle
and idle gap is .8mm

[vnmsgt]

OK

HSN is 4 1/2 turns from close
LSN is 3 3/4 turns from closed
There is no mid range needle
and idle gap is .8mm

Cool I was just about to check on my RTR I had in stock for him.

[hakmazter]

I love how everyone helps each other on here. I hope it never changes.

thanks guys.

Mike

[manynitros]

I love how everyone helps each other on here. I hope it never changes.

thanks guys.

Mike

It certainly is the way it should be. I hope people don't change their attitudes when this forum gets huge. Above and Beyond Customer Service is what it's all about...

[razzor]

+1 :)

[racer-dom]

OK

HSN is 4 1/2 turns from close
LSN is 3 3/4 turns from closed
There is no mid range needle
and idle gap is .8mm

Mine has a mid range needle and on the casterracing site it has a mid range needle on the force 25. It does say not to touch it but I have and now I am in a little pickle.

[razzor]

Usually most engines MRN's are set flush to the carb housing, so do that and take it from there.

[racer-dom]

Usually most engines MRN's are set flush to the carb housing, so do that and take it from there.

Thanks razzor I have done all that I set the HSN to flush and 2 turns in and the LSN I set to flush but on the other side of the carb directly across from the LSN there is the screw for the main jet or spray bar this is the Mid range needle it is not meant to be set to flush and it is not meant to be set all the way in.

Well I broke it in on the weekend anyway with those settings after 7 tanks I started to tune it and it is running really well I think I can get a little more performance out of it but I just need to do a little bit more fine tuning and I will be ok. Temp at the moment is to low so I can go a little bit more lean but just need to find the time.

[racer-dom]

Here is a link to the ofna instructions on the base line settings for the force 25 the one marked D and highlighted in red is the one that I need the help with.
http://www.ofna.com/guide-tune-basics.html

It says do not adjust but when there is a whole heap of metal shavings through the body there is no choice but to strip it down.

[razzor]

Just to clarify what is what needle.

http://i6.photobucket.com/albums/y236/razzor13bt/CarbDiagram.jpg

On all my engines i have owned with 3 needles i have never had to adjust teh MRN and it was always flush to carb housing.

[racer-dom]

Just to clarify what is what needle.

http://i6.photobucket.com/albums/y236/razzor13bt/CarbDiagram.jpg

On all my engines i have owned with 3 needles i have never had to adjust teh MRN and it was always flush to carb housing.

This is what has got me stumped on the OFNA site they have the mid and low range around the opposite way.

So razzer should I just tune to the specifications that you have pointed out as above or should I follow the ofna site and tune the way that they say.

[manynitros]

Definitely follow razzors instructions. Ignore the Ofna typos. Use this link from the Hyper Series mills, it is just like the one razzor included.
http://www.ofna.com/pdf/eng-hyper21.pdf

[bc24fl]

Razzor was given his title for a reason. Man knows his stuff yet very humble guy. Wish he lived down here!

[razzor]

I wished i lived there ;)

Go with the hyper 21 settings or what i posted since its a reference point.
Just remember to start a bit rich and if not sure start from scratch again.

You did say you had it running much better.
Post where your needle settings are now or what is teh motor doing.
If the tune is close maybe just stick to it and fine tune it a bit more.

[racer-dom]

Well what I have done is set the brass needle now I know that this is the mid range as I am going to go of what ever person on this site and from what a few local guys told me. I have set this needle to flush and the low end needle when I first started tuning it was set to flush as well. The engine would not start with this setting as there was to much fuel getting through so I adjusted the low end 1/8 turn at a time until it would try and turn and then I opened the throttle a little bit and started the car so it was running. At this stage it was running very rich but I had it running so after 1/2 a tank of fuel on this setting I could grab the motor it was not hot at all so I bumped it up1/8 of a turn and off I went ran a few tanks through it per the instructions for break in on the force 25 and then each 1/2 a tank that I ran through it I would check for performance and temp. So basically I got it to the point where it was running to my exact expectations and then I put the cover on and ran a lap and bought it in to check the temp. Well I found that the temp had sky rocketed with the cover on and it ran much better at the higher temp so I am going back out today to do a little more tuning and will be doing all this with the cover on.

I would like to say thanks a lot to all of the guys here for helping me out I hope that one day I get this much knowledge and I can help others out.

[maz64]

we have this mid range needle on our os engines
it actually changes mixture strength at mid range and under acceleration

star with it flush if you need to move it move inwards very slightly
i find on the os engines both the 21 v spec and the .28xz that the best place is just slightly in from flush only a tiny amount

once you have got this needle set it does not need touching again you can just tune youe eng using the hsn/lsn as normal

when you have it set put a mark on the needle and on the side of the case we have had this needle move slightly due to vibrations ect
if you put a mark on it its easy to see if it has moved and a simple job to put it back

chris

[razzor]

Also when you adjust the MRN i always make the same adjustment to the LSN ie
1/2 turn in on MRN = 1/2 turn out on LSN etc..
The MRN as said above actually changes the mid range power band and is very sensitive so never more than 1/2 turn either way from flush but recommend to leave it alone though if not familiar with tuning yet.