engine mapping
Discussion
2d map would be mapping the fuel and/or ignition against just the engine revs (not normally for fuel though, although i think some big drag race engines dont map in 3d for the fuelling .. anyone let me know on that?), ie think of a distributor with no vacuum advance .. the advance curve is fixed against revs no matter what throttle position/load you generate. If you graph the results you just get a straightforward single line of revs and ignition values.
a 3d map takes account of both revs and throtle position/load so you have generated a 3d graphical representation ..
hope that makes sense.
a 3d map takes account of both revs and throtle position/load so you have generated a 3d graphical representation ..
hope that makes sense.
just been in touch with John wilcox and they say, Yes it is possible to have a 3D sytem on carburettors if it is fitted with a throttle pot on the end of the carburettors. If it has no throttle pot then it is a 2D system.
so it seems you can 3d map a engine on carbs.
now i need to know what a throttle pot is?smile
so it seems you can 3d map a engine on carbs.
now i need to know what a throttle pot is?smile
trotsky said:
just been in touch with John wilcox and they say, Yes it is possible to have a 3D sytem on carburettors if it is fitted with a throttle pot on the end of the carburettors. If it has no throttle pot then it is a 2D system.
so it seems you can 3d map a engine on carbs.
now i need to know what a throttle pot is?smile
If you don't have a throttle pot you can still 3-D map is using manifold pressure for load. That's what a traditional dizzy vacuum advance unit does, after all.so it seems you can 3d map a engine on carbs.
now i need to know what a throttle pot is?smile
trotsky said:
just been in touch with John wilcox and they say, Yes it is possible to have a 3D sytem on carburettors if it is fitted with a throttle pot on the end of the carburettors. If it has no throttle pot then it is a 2D system.
so it seems you can 3d map a engine on carbs.
now i need to know what a throttle pot is?smile
I had a 3D system on my 2.0 VX engine with its twin 45 Webers and it improved the performance and economy quite noticeably.so it seems you can 3d map a engine on carbs.
now i need to know what a throttle pot is?smile
The throttle pot(entiometer) is attached to the side of the carbs and connected to the throttle spindle to indicate to the ECU the position of the throttle opening. I can't recollect how much mine was for my setup but I wouldn't expect it to be much more than £40 or £50. Have a look at this thread for some info http://www.blatchat.com/T.asp?id=128182
T
OOhh fairy muff .... 
I always thought that the optimisation of fueling with injection at any give load / speed / throttle opening was the very essence of 3d mapping.
I guess you could use other parameters for the 3 dimensions / inputs but shirley you wont get the fueling optinmised at a very significant % of speed / load sites with carbs even with 3D ?
Dave
I always thought that the optimisation of fueling with injection at any give load / speed / throttle opening was the very essence of 3d mapping.
I guess you could use other parameters for the 3 dimensions / inputs but shirley you wont get the fueling optinmised at a very significant % of speed / load sites with carbs even with 3D ?
Dave
One being built here http://www.mygt40.com/ or a pair of finished examples are at http://www.gt40s.com/forum/rcr-forum-rcr40-rcr70-p...
Mines going to be blue.....
Mines going to be blue.....
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