Redback Banned 236 Member For: 15y 3m 13d Gender: Male Location: Blacktown NSW Posted 13/10/10 11:33 AM Author Share Posted 13/10/10 11:33 AM Well I think im convinced. I just ordered a Plazmaman Plenum. Thanks for the info guys. Link to comment Share on other sites More sharing options...
F6R Member 81 Member For: 15y 8m 8d Posted 13/10/10 06:42 PM Share Posted 13/10/10 06:42 PM (edited) Not done it on one of these yet, as the provision to 3D trim the cylinders is not there yet, and I dont know if it is even coded into the oak. There is no closed loop individual lambda trimming to the best of my knowledge, but there is individual cylinder knock control.The The last GTR I did which still ran the stock intake went like this:Cyl 6 needs an increase of 6% by 5000 at 200kpa abs and 12% by 8000, but needs a reduction of 16% at 50kpa abs below 3000 tapering to zero by 150kpa abs and 5000rpmCyl 5 needs a reduction of 12% at 50kpa abs below 3000 tapering to zero by 150kpa abs and 5000rpmCyl 4 is neutralCyl 3 needs an increase of 3% by 8000rpm from 5000 at 200kpaCyl 2 needs 5% by 5000rpm at 200kpa and 9% by 8000 at same pressureCyl 1 is neutralThis sorts the fuelling out. There is still cylinder temperature to deal with, which I use high speed EGT's for. Edited 13/10/10 06:42 PM by F6R Link to comment Share on other sites More sharing options...
Boosted1 Member 346 Member For: 15y 10m Posted 13/10/10 07:06 PM Share Posted 13/10/10 07:06 PM aaron from DTM in geelong has a turbo EL falcon, he has done individual cylinder sensors on his exhaust ports. I beleive its for two resons mentioned above. but would this only be nessasary if you are pushing the upper limits? ie 500> Link to comment Share on other sites More sharing options...
IH8TOADS Silver Donating Members 3,618 Member For: 19y 2m 16d Gender: Male Location: OZ Posted 14/10/10 02:42 AM Share Posted 14/10/10 02:42 AM F6R the PCM does both, it's there. Rapid the BA/BF has that table but I wouldn't touch it unless you have data to back up why you're making the change. Link to comment Share on other sites More sharing options...
DUS12 Member 471 Member For: 17y 2m 19d Posted 14/10/10 02:56 AM Share Posted 14/10/10 02:56 AM I got pyro bosses in each runner, dont tune so close to the edge and you wont have a problem, easy Link to comment Share on other sites More sharing options...
turbotrana Member 2,586 Member For: 21y 5m 25d Gender: Male Posted 14/10/10 12:10 PM Share Posted 14/10/10 12:10 PM Some good info here. Innovate do a lambda setup that allows you to datalog every cylinder and is being used by alot of serious tuners. I know that EGT sensors were the main thing to use years ago (pre cheap lambda)and would certainly aid in comparing cylinders if datalogged. But I'd say there are less than a handfull of Ford Turbo tuners that use either. Most just use a lamda in the tailpipe on a non load dyno. that's why we see so many melted pistons on highly strung engines. I am sure Nizpro would know the variances in cylinders. Link to comment Share on other sites More sharing options...
F6R Member 81 Member For: 15y 8m 8d Posted 14/10/10 05:13 PM Share Posted 14/10/10 05:13 PM The trouble with an EGT is that it is less specific about whether there is a timing or fuelling issues causing the variation in temperature. Lambda is more specifically mixture related - well timing can change mixture slightly, but that's another thing.I know there are tables for individual bank trimming in the oak, but certainly with regards to the turbo engine, the function is disabled and the tables are empty.I struggle to see how closed loop individual fuel trimming can work on these engines when it comes out and straight into a blender. It'd be one hell of a task to map that with both O2's downstream as they are. Link to comment Share on other sites More sharing options...
IH8TOADS Silver Donating Members 3,618 Member For: 19y 2m 16d Gender: Male Location: OZ Posted 15/10/10 02:12 AM Share Posted 15/10/10 02:12 AM You make some good points F6R. Being time window based would make it possible....accuracy could be debated. The second O2 is not used in the closed loop fuel trimming. Link to comment Share on other sites More sharing options...
Smoke them tyres Member 557 Member For: 16y 9m 3d Gender: Male Location: Brisbane Posted 15/10/10 09:25 AM Share Posted 15/10/10 09:25 AM (edited) The trouble with an EGT is that it is less specific about whether there is a timing or fuelling issues causing the variation in temperature. Lambda is more specifically mixture related. I struggle to see how closed loop individual fuel trimming can work on these engines when it comes out and straight into a blender.Absolutely spot on.The car actually has 2 "blenders".....the exhaust manifold that collides the flows AND the turbine which swirls the flow. Edited 15/10/10 09:39 AM by Smoke them tyres Link to comment Share on other sites More sharing options...
F6R Member 81 Member For: 15y 8m 8d Posted 15/10/10 06:20 PM Share Posted 15/10/10 06:20 PM True that. 2 blenders!Second O2 is just there to tell you the cat is misbehaving I think..... could be wrong. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now