might be the case for the 2lt i suppose but my 1400 was on 40's
Printable View
might be the case for the 2lt i suppose but my 1400 was on 40's
you will def need to map ecu but it wont idle better? its the opening durations of the valves that makes it tickover rough, therefore with the valves being open longer you get more valve overlap! this is what causes rough ilidling and poor low end power.
my cam is a 300 deg one and sits at idle perfectly on 900 rpm. its lumpy in the sence that the exhaust pulses a lot but if i wind the idle to 1000 it even gets rid of that,
Agree with md, my kent 296 idles as smooth as a standard one, infact none of my cams have had a 'rough' idleQuote:
you will def need to map ecu but it wont idle better? its the opening durations of the valves that makes it tickover rough, therefore with the valves being open longer you get more valve overlap! this is what causes rough ilidling and poor low end power.
The only thing i can see with more lift and duration is emissions. Mine gets through an mot but only just, kinda, almost. with more lift and duration the overlap is likely to be alot more and hence if for road use it 'may' cause problems acquiring an mot certificate but that would be a suck it and see approach.
I did try a few cams, but that was the progression of the engine and getting it just right. Only way to find out if the cam is what you want is to get it and try it, if it isnt quite right then you can always try again.[/quote]
yeh im sure if the engine is sett up correctly the engine will run smooth tick over.
thanks for the input guys i will prob go for the nvo 63 as it does sound like the one im after. i take it none of you have used it before?
bruce
I wouldn't worry about MOT emissions, you can just plug in the laptop and lean it off till it passes then return it to the map it normally runs :lol:
good choice! i dont know anyone that has used that cam but my mates have used similar cams and myself. you will notice alot of difference through the higher revs. are you buying a vernier aswell? you will need one of these to 'fine tune' the cam on the rolling road.Quote:
Originally Posted by broos3
yeh the cam need a comp valve spring caps and uprated valve springs and i have both and yes got a vernier aswell.
bruce
correct me if i'm wrong, but isn't the problem with injection and big cam's due to the air flow meter? alot of overlap causes a pulse up the inlet track which when it hit's the AFM it send's the ecu daft? as you are having a mappable ecu, you won't have a AFM. that's one of the reason's to swap to mappable, so you can run bigger cams.
i might be talking bollox about the theory of it all, but i think i've got some of it right. i've got a book somewhere that explains it all, i'll have a look for it.
the bst thing to do would be to ring piper and kent (other cam manufactures are available) and see what they recommend, then choose between the 2
i was also told the ast1 is quite good, worth a look