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Hey Mieran, I've looked at stuff like that before when a Dbilas setup came up for sale for similar money. Not sure if it's a worthwhile route going down, the reviews of the Dbilas setup seemed quite mixed.
Scott yeah I guess it's down to the better design/airflow/throttle response, and probably an ECU map to suit the changes?
Would definitely want an AFR gauge with that on though!
I'm currently chasing seeking idle, cutting out, misfiring and aftermarket revlimiter not working. :(
Howd you come to that conclusion!? You have a standard airflow meter so if it flows more air, it alters the fuelling. I set up an fpr on my xe when it was running injection, on a rolling road. Went from 160hp at 14:1, to 164 at 12.1:1.Quote:
Originally Posted by MK999
Easy to see how a dblias set-ups work!
ECU is obviously mapped on a standard inlet blah blah.
If the ecu could simply fuel according and adjust to the amount of air flowing through the afm, and then give the correct output for any circumstances then you would only ever need a single ecu, to run any engine... lol
It cant learn that way.
It see's lets say "20" incoming air, looks at coolant temp etc, and then injects say "50" fuel because thats what programmed on its map.
That would be good for the engine the ecu was designed with, but now the engine has a completely different inlet tract and flow characteristics it will not need that "50" fuel anymore.
Thats trying to put it a simple way anyhow lol
I remember a guy on mig put dbilas bodies on his c16xe (standard ecu), it sounded nice, made more peak power(at higher peak rpm) but it was actually slower on track and down 1/4mile, by a long way too.
chimp007-14:1 afr isnt best for peak power, hence why you saw a change...
I took the Nova out for 15 minutes earlier today to warm up the oil ready for an oil change, ended with me at the side of the road and getting a tow back. Started running on three cylinders and a loud clattering noise from the top end.
Whipped the rocker cover off to find this, to the left and right of the cam cap are #2 exhaust cylinders. Slight problem here!
http://iainel.co.uk/images/forums/NovaWIP2a/698.JPG
Pulled the exhaust off and my mate said "watch this" and proceeded to do this with his fingers through the exhaust port lol
http://www.youtube.com/watch?v=dePMW...ature=youtu.be
Engine stripped down again to assess the problem/damage
http://iainel.co.uk/images/forums/NovaWIP2a/699.JPG
Come out little valve we won't hurt you lol
http://iainel.co.uk/images/forums/NovaWIP2a/700.JPG
For some unknown reason it's snapped one of the valve springs (new when built 12k ago). Luckily I didn't run it for too long after it happened, although the valve has been touching the piston as it moved when I cranked it by hand when it was timed up.
Will have the head off in a couple of weeks when I have time and crack on with fixing it, but it's a good opportunity to do the stem seals when I'm there as it's burning oil anyway.
invest in some new gm springs.
They were a set of brand new GM springs when I built it. :(
erm warranty???
Hmm bought May 2010 via a mate who could get trade prices, think I've shot myself in the foot there.
buy double valve springs the bigger cams are probably botteming out the spring
sorry to see this mate, could be worse I'm sure this isn't going to tax your skills :)
you think its pure coincidence this happening after the lumpy cam going in?