Go-Tech Engines Thread
#2612
Tech Apprentice
Joined: Apr 2008
Posts: 67
I have always found it is the opposite. If you go off a jump and stuff and the rpms stay too high and do not come back down I richen the low speed up and it fixes the problem. IMO the low speed is too lean if you do not have a air leak. I have had 3 motors I got from a friend do this too me and the all 3 the low speed was too lean.
1. Do I have to seal everything in that article on the GoTechs? Ie, backplate, carb, carb clamp screw, HSN, etc?
2. If you end up richening up the LSN to get the mix right at the end of the race, do you guys have any issues keeping it running at the very beginning when the engine is cold? Ie do you have to constantly rev it to blow out the extra fuel until you warm up the engine?
#2614
Rich and low LSN can cause an erratic idle. Different brands of motors also tune differently. The Go-Tech's seem to favour a fat HSN and a lean LSN.
If the engine is coming to an idle and "machine gunning" - a very fast and high pitched idle that sometimes pulses, then the LSN is too lean. Richen it 1/8 at a time until you get a stable idle. If the engine is coming in and idling normally then after a few seconds the idle suddenly drops dramatically, the LSN is too rich and the engine is loading up. This situation will cause the engine to run continually hotter as the tank level drops and is a cause of a lot of tuning problems when it is combined with an idle gap that is too wide.
Set idle gap at .7mm and tune from there, only adjusting idle once you have tuned both HSN and LSN. See the post I put up on page 81 about 2/3 of the way down. It covers this tuning situation in detail.
Make sure you tune with the engine at operating temp at around half tank, and only make 1 hour adjustments at a time.
You don't want your LSN too rich. You will have no bottom end punch. The engine reving after you come of a jump is typically caused by too wide an idle gap and a rich LSN. Been there and done that
If the engine is coming to an idle and "machine gunning" - a very fast and high pitched idle that sometimes pulses, then the LSN is too lean. Richen it 1/8 at a time until you get a stable idle. If the engine is coming in and idling normally then after a few seconds the idle suddenly drops dramatically, the LSN is too rich and the engine is loading up. This situation will cause the engine to run continually hotter as the tank level drops and is a cause of a lot of tuning problems when it is combined with an idle gap that is too wide.
Set idle gap at .7mm and tune from there, only adjusting idle once you have tuned both HSN and LSN. See the post I put up on page 81 about 2/3 of the way down. It covers this tuning situation in detail.
Make sure you tune with the engine at operating temp at around half tank, and only make 1 hour adjustments at a time.
You don't want your LSN too rich. You will have no bottom end punch. The engine reving after you come of a jump is typically caused by too wide an idle gap and a rich LSN. Been there and done that
Last edited by grizz1; 05-08-2008 at 02:53 PM.
#2617
I should have my order in by monday for my motors at holeshothobbies.com Which one you looking for. I have some of them sold already but should be able to get one drop shipped to you if I do not have it.
#2618
#2622
Tech Apprentice
iTrader: (7)
Joined: Nov 2007
Posts: 66
Hi guys... I have just ordered a .21 5 port for my buggy and a .28 6 port for my truggy. I bought a JP-3 pipe for each. After reading through this, I see that the Dynamite pipes (086 and 053) are recommended. Is it worthwhile me getting these pipes instead?
#2623
I have 2 modded 3 port race engines with team mods available.



2Likes
You better give us the inside scoop on all the new goodies
The hard anodised finish pipe is great value for money too when compared to other brands.