TAR
24-12-2009, 12:34 AM
I thought I would post up my recent dyno print-outs courtesy of Ben at Eurospec.
But first I want to thank Ben and the team at Eurospec for the great job they did on sorting out my car.
Since the dyno day last year, my car has been running very lean; lots of power but not really healthy for the engine. It was completely standard at that time and it made 259BHP (adjusted figure as its a pre-facelift auto).
I then had an opportunity to get a MAP2 ECU at a great price (thanks to Nutter_John) but didn't want to use it until the lean running was sorted.
This meant I spent all last summer and a Silverstone trackday running the MAP2 in self learn mode at wastegate pressure only - fun, but not enough!
Then by another stroke of fortune a set of 3" downpipes and a decat were aquired and hastily fitted, albeit with the standard back end still on it.
Eventually an opportunity arose to get the car down to Ben for mapping so off it went. He had to add LOADS of fuel to offset the lean running but managed to get the car up to 242BHP. The power came on hard and fast very low in the rev range which made the car feel pretty quick. :)
At this point I wanted to measure the AFR's to see what was going on. Step up Pezza with an Innovate LC-1 for sale. Fitted and working it was showing the AFR to still be on the lean side?
I eventually found enough cash to get a Walbro 255lph fuel pump and a Sytec motorsport fuel pressure regulator; this is where the problem really started.:(
The fuel pump was fitted followed immediately by an issue with starting, it took several seconds to fire up regardless of whether it was hot or cold. This was diagnosed as the check valve in the new pump being faulty so that will have to come off and go back to the supplier.
After fitting the new pump, the AFR's dropped and the car started running much richer, as expected if the original pump was tired.
So next was the FPR. On it went and splutter went the car. IT WOULD NOT START FOR LOVE OR MONEY /bat
I spent a whole weekend on my cold wet driveway removing plugs and checking coil packs and twice removing and refitting the FPR without any joy.
I was almost at the point of putting a match to it when on the 3rd time of removing the plugs and cleaning them, it started :d
It was overfuelling like mad, stunk of petrol and wouldn't tick over. It was awful but it was running.
So off to Eurospec with an instruction to keep it until it worked again.
Well within a day, Ben was on the phone to tell me he had found the problem.... The MAP2 had switched from primary to secondary and guess what? there was nothing in the secondary map and no MAF for the ECU to read from. The reason for the switch remains a mystery and Ben had to fiddle with the MAP2 to get it to look at the primary table again, however so far, its been OK (although that was just on a sedate drive home in the snow)
Not only did Ben find the fault and fix it quickly, he also remapped it to take out the now excess fuel and had it valeted. That is a professional service if ever I saw one. :thumbsup:
So finally I now have a Legnum running a MAP2 ECU at 0.8 BAR with 3" downpipes, decat , Innovate LC-1 wideband controller and a performance air filter.
The graphs are attached to the next post.
:)
But first I want to thank Ben and the team at Eurospec for the great job they did on sorting out my car.
Since the dyno day last year, my car has been running very lean; lots of power but not really healthy for the engine. It was completely standard at that time and it made 259BHP (adjusted figure as its a pre-facelift auto).
I then had an opportunity to get a MAP2 ECU at a great price (thanks to Nutter_John) but didn't want to use it until the lean running was sorted.
This meant I spent all last summer and a Silverstone trackday running the MAP2 in self learn mode at wastegate pressure only - fun, but not enough!
Then by another stroke of fortune a set of 3" downpipes and a decat were aquired and hastily fitted, albeit with the standard back end still on it.
Eventually an opportunity arose to get the car down to Ben for mapping so off it went. He had to add LOADS of fuel to offset the lean running but managed to get the car up to 242BHP. The power came on hard and fast very low in the rev range which made the car feel pretty quick. :)
At this point I wanted to measure the AFR's to see what was going on. Step up Pezza with an Innovate LC-1 for sale. Fitted and working it was showing the AFR to still be on the lean side?
I eventually found enough cash to get a Walbro 255lph fuel pump and a Sytec motorsport fuel pressure regulator; this is where the problem really started.:(
The fuel pump was fitted followed immediately by an issue with starting, it took several seconds to fire up regardless of whether it was hot or cold. This was diagnosed as the check valve in the new pump being faulty so that will have to come off and go back to the supplier.
After fitting the new pump, the AFR's dropped and the car started running much richer, as expected if the original pump was tired.
So next was the FPR. On it went and splutter went the car. IT WOULD NOT START FOR LOVE OR MONEY /bat
I spent a whole weekend on my cold wet driveway removing plugs and checking coil packs and twice removing and refitting the FPR without any joy.
I was almost at the point of putting a match to it when on the 3rd time of removing the plugs and cleaning them, it started :d
It was overfuelling like mad, stunk of petrol and wouldn't tick over. It was awful but it was running.
So off to Eurospec with an instruction to keep it until it worked again.
Well within a day, Ben was on the phone to tell me he had found the problem.... The MAP2 had switched from primary to secondary and guess what? there was nothing in the secondary map and no MAF for the ECU to read from. The reason for the switch remains a mystery and Ben had to fiddle with the MAP2 to get it to look at the primary table again, however so far, its been OK (although that was just on a sedate drive home in the snow)
Not only did Ben find the fault and fix it quickly, he also remapped it to take out the now excess fuel and had it valeted. That is a professional service if ever I saw one. :thumbsup:
So finally I now have a Legnum running a MAP2 ECU at 0.8 BAR with 3" downpipes, decat , Innovate LC-1 wideband controller and a performance air filter.
The graphs are attached to the next post.
:)