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those of you that have been following the saga will Know that I recently had built and fitted a hybrid turbo, spec was exactly the same as Damien's (ALFADOIT) spec as having been in the passenger seat of his car I was blown away by the power and responsive nature of his set up.
my car had previously a standard turbo on a very nice responsive map provided by loz when he did my EGR delete...iIwas happy with this but wanted to take it to the next stage so contacted turbo dynamics and discussed the hybrid design with them.
after a while a found a suitable donor turbo a Garrett 777250-1 from a clover with 40k on the clock. sent to turbo dynamics who re-worked the turbo, I then picked it up and went down to Loz for fitting.
My immediate reaction was that the midrange as much improved but that it was spooling much later than it should at around 2200 rpm, this made staying on boost really difficult and driving the car was a drag but i assumed it was a mapping issue and decided to hold of on judgement until it was re-mapped.
I elected to go to Red dot and had the car mapped there...began with a figure of 177 BHP with 240 ft lb and after the mapping ended up with 196 bhp and 314 ft lb..however the real issue and surprise was that the curve had not changed at all, still in late at 2200 rpm and tailing off early at 3500 rpm, Paulo said at the time he thought the VNT actuator was not calibrated correctly.
spoke to Tom at turbo dynamics who said it most likely be ''something else'' Normally I would agree with this but having changed all the sensors (MAF,MAP )and VNT actuator solenoid I had ruled out any power train related issues , all the sensors were Bosch Genuine and fitted by Autolusso south when fitting the turbo.
however in order to move forward I had to get it checked out so I drove down to Loz again and it was all ''double checked'' nothing odd was found and the problem of late spool and early drop off was still present.
after much head scratching it was suggested I go see Ned at autolusso in luton.
I am glad i did as it was an interesting day and ultimately Ned got it sorted..
the red dot map was not helping issues as on investigation the boost limiters were not right, Ned and Wayne loaded about 6 maps today and although things were better each time it was still ''not right''
Ned then said he had an identical Turbo in the building and suggested changing them over..after some thought I decided to go ahead,and...
The car is now Exactly as I envisioned it would be before I elected to go with the hybrid, after driving home round the M25 and through Guildford I can report it kicking in from 1500 rpm is nicely responsive from 1800 rpm, full boost is achieved at around 2k and pulls all the way up the rev range EXACTLY like Damien's
the car goes like stink with power on tap in every gear , driving round town is now easy not requiring multiple gear changes like before.
my conclusions are
1) Autolusso maps are very good and a Dyno is not required to get the result you want,Ned and Wayne tweaked several things on the car resulting in an improvement on the red dot map even before the turbo was changed over, if I had to do this again I would go to Ned first and will be for any further map tweaks.
2) the turbo was definitely the main culprit as on swapping over it was all much better, how much better was not entirely evident until my drive home but needless to say its now awesome, have yet to speak to turbo dynamics but they are decent guys so we should be able to sort something out with all of this.
and finally a very big thanks to Ned for the work today, I feel like I have exactly the car I set out to achieve the drive home was a blast!
no doubt I will need a clutch in the next few months!
my car had previously a standard turbo on a very nice responsive map provided by loz when he did my EGR delete...iIwas happy with this but wanted to take it to the next stage so contacted turbo dynamics and discussed the hybrid design with them.
after a while a found a suitable donor turbo a Garrett 777250-1 from a clover with 40k on the clock. sent to turbo dynamics who re-worked the turbo, I then picked it up and went down to Loz for fitting.
My immediate reaction was that the midrange as much improved but that it was spooling much later than it should at around 2200 rpm, this made staying on boost really difficult and driving the car was a drag but i assumed it was a mapping issue and decided to hold of on judgement until it was re-mapped.
I elected to go to Red dot and had the car mapped there...began with a figure of 177 BHP with 240 ft lb and after the mapping ended up with 196 bhp and 314 ft lb..however the real issue and surprise was that the curve had not changed at all, still in late at 2200 rpm and tailing off early at 3500 rpm, Paulo said at the time he thought the VNT actuator was not calibrated correctly.
spoke to Tom at turbo dynamics who said it most likely be ''something else'' Normally I would agree with this but having changed all the sensors (MAF,MAP )and VNT actuator solenoid I had ruled out any power train related issues , all the sensors were Bosch Genuine and fitted by Autolusso south when fitting the turbo.
however in order to move forward I had to get it checked out so I drove down to Loz again and it was all ''double checked'' nothing odd was found and the problem of late spool and early drop off was still present.
after much head scratching it was suggested I go see Ned at autolusso in luton.
I am glad i did as it was an interesting day and ultimately Ned got it sorted..
the red dot map was not helping issues as on investigation the boost limiters were not right, Ned and Wayne loaded about 6 maps today and although things were better each time it was still ''not right''
Ned then said he had an identical Turbo in the building and suggested changing them over..after some thought I decided to go ahead,and...
The car is now Exactly as I envisioned it would be before I elected to go with the hybrid, after driving home round the M25 and through Guildford I can report it kicking in from 1500 rpm is nicely responsive from 1800 rpm, full boost is achieved at around 2k and pulls all the way up the rev range EXACTLY like Damien's
the car goes like stink with power on tap in every gear , driving round town is now easy not requiring multiple gear changes like before.
my conclusions are
1) Autolusso maps are very good and a Dyno is not required to get the result you want,Ned and Wayne tweaked several things on the car resulting in an improvement on the red dot map even before the turbo was changed over, if I had to do this again I would go to Ned first and will be for any further map tweaks.
2) the turbo was definitely the main culprit as on swapping over it was all much better, how much better was not entirely evident until my drive home but needless to say its now awesome, have yet to speak to turbo dynamics but they are decent guys so we should be able to sort something out with all of this.
and finally a very big thanks to Ned for the work today, I feel like I have exactly the car I set out to achieve the drive home was a blast!
no doubt I will need a clutch in the next few months!
aperbag:
