I hope you guys can guide me < noob
I am converting my 1.4 engine to a 1.6 by changing the crankshaft and conrod.
I need to get the car from my house to the rolling road guys who tune megajolt about 80 miles away.
They configured the first map for me.
Is it okay to use the original map to run the new 1.6 engine in?
Nothing else has changed apart from the increased capacity.
Other notes
The bike carbs have always run slightly running rich (150 jets).
Take it easy you should be ok.
You could always re calculate the 'req fuel' based on your expected bhp increase.
I will take it easy:
Is 2000 to 3000rpm enough to run in an engine?
Usually when capacity is increased to you increase timing or decrease.
There is no set in stone way to do it,lots of different views on how to do it!
One thing that seems to be agreed with all the ways is you must use the engine on the over run as much as you do using it to power up.
Cruising for miles on end at the same revs is to be avoided.
Also no using WOT ,but you can use higher revs once you have covered a couple of hundred miles but building the revs up slowly.
If you Google it you will find loads of opinions on it!
[Edited on 7/9/17 by CosKev3]
Just been told by the guys who did the first map that the bigger capacity wont really affect the ignition map it,ll probably just need to be made a bit richer due to the increased capacity so if I drive it across steadily then I should have no problems especially if it was a bit rich to start off with.
quote:
Originally posted by bikecarbfred
Nothing else has changed apart from the increased capacity.
Comp ratio from 10:5:1 to 11:5:1
Higher Comp ratio will cause you to need a more conservative ign map.
Fuel requirements will be scaled by approx 114%.
If it were me, purely intuitively and at my own risk, I'd drop 5 degrees off across the loaded area of the ignition table and scale all fuel
table values by 14% as a quick fix. Technically you should mod the base fuel requirement (Req_fuel in MS).
Brilliant. Thanks. Not using MS though. So can't control fuel. Megajolt and carbs were running rich before hand so will be suited for the 1.6.
Just need to know which way pos or negative the ignition map should be.
I think I will have to ease it off like you said.
I also have a knock sensor Phormula KS-3 knock (detonation) Hopefully that would help.
[Edited on 7/9/17 by bikecarbfred]
I will be now installing a pair of schrick mild road cams with an extra 1mm of valve lift and a increased duration in the new build.
Does this mean I will now definitely require a more conservative map?
With carbs they will change the fuelling themselves to a certain extent. But should remain OK as long as you are careful about keeping revs etc
sensible. 3K and all should be fine
As to ignition, under light load and keeping the revs down, again it should be OK, but won't hurt to reduce the map a few degrees.After all, you
have only have a small distance to cover....and damage rarely happens at sensible revs unless things are miles out.
quote:
Originally posted by bikecarbfred
I will be now installing a pair of schrick mild road cams with an extra 1mm of valve lift and a increased duration in the new build.
Does this mean I will now definitely require a more conservative map?