How do I post pics of dyno graphs?
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Dyno graphs for. ITbs on a 2.5 M20
Moderator: martauto
This shows how much effect cams have on torque
The Aldon graph showing 197 est hp at the top shows just over 85 ft lbs at 3k rpm, 120 ft lbs at 4k this was the best map after a day having the eber Alpha ECU mapped
The same RR At Aldon with the 285 CATCam in shows 130 ft lbs at 3k rpm and approx 148 ft lbs at 4 k again this was best map after a day on the rollers, theAlpha system is mapped using a developments EPROM chip, the cars own chip is then re burnt and put back in the ECU
At first sight it seems like replacing the Cam was a quick way to loose 10 hp. However I drove the car at Donnington before and after and the car was quicker after. The reason I think being the ratio gap in the sport Gbox
The Aldon graph showing 197 est hp at the top shows just over 85 ft lbs at 3k rpm, 120 ft lbs at 4k this was the best map after a day having the eber Alpha ECU mapped
The same RR At Aldon with the 285 CATCam in shows 130 ft lbs at 3k rpm and approx 148 ft lbs at 4 k again this was best map after a day on the rollers, theAlpha system is mapped using a developments EPROM chip, the cars own chip is then re burnt and put back in the ECU
At first sight it seems like replacing the Cam was a quick way to loose 10 hp. However I drove the car at Donnington before and after and the car was quicker after. The reason I think being the ratio gap in the sport Gbox
meant to say the other graph was done just after I replaced the cam ( i also had the head flowed). on a hub dyno to check the cam timing on the vernier pulley before it went to Aldon for the re map
This is interesting to prove 2 things
1 cam timing made 4 hp
2 I've got piper cross filter socks on the end of the ITB,s I did this because the guy at Aldon reckoned they were a good way of protecting the engine and wouldn't cost any HP
subsequently a fair few people who claimed to be in the know told me that these socks would definitely loose me power. so we took the socks off and did a run and then put them back on and did a run, see the green line on the graph
Result the socks actually seem to be helping the engine make power, possibly by getting rid of some kind of interference between the adjacent trumpets on the ITBs
Just goes to prove nothing is ever proven until its tested on YOUR OWN engine
This is interesting to prove 2 things
1 cam timing made 4 hp
2 I've got piper cross filter socks on the end of the ITB,s I did this because the guy at Aldon reckoned they were a good way of protecting the engine and wouldn't cost any HP
subsequently a fair few people who claimed to be in the know told me that these socks would definitely loose me power. so we took the socks off and did a run and then put them back on and did a run, see the green line on the graph
Result the socks actually seem to be helping the engine make power, possibly by getting rid of some kind of interference between the adjacent trumpets on the ITBs
Just goes to prove nothing is ever proven until its tested on YOUR OWN engine