Another successful re-build.
Discussion
About two years ago I decided..... The 928 had to make way for a Cerbera.... but V8 or straight 6?
I decided on the six (for various reasons), and yes, I was fully aware of the issues with the in-line engine after all the chitchat on this website and also conversations with 'folks' who have experience rebuilding and improving these units.
I simply wished to establish a strong engine for reliable road use. Also, my expectations regarding mileage is around 5k miles per year, therefore 100k between rebuild is not an issue for me.
I have kept a watching brief over all the suggestions and alternatives to either correct initial design flaws, materials and QA of parts or improvements to extract further power / delivery or longevity.... the eternal compromise that all engine designers attempts to balance.
A 'well cared for' SpeedSix with an engine that needed a re-build was for sale locally, so for me this was an excellent opportunity.
I decided that TVR Power should complete the rebuild.
I will admit that I had to be patient and there were a number of issues that we had to resolve, such as a new starter motor and a replacement 1/2 time bearing which required the engine to come out again!
So, the reason I now place these words on this forum is simply due to what I regard as the completion of the rebuild, the re-mapping of the ECU. This was actually done by John Ravenscroft. The engine now is, as I believe it should be, simply having a very strong smooth delivery of torque as the revs rise….. actually very very smooth.
Yes, it did take a long time to sort and there were repairs along the way following the rebuild, however, I'm now seriously pleased at the end result and I do have confidence that the work Dom and his team has completed on my 4.0ltr is certainly producing the goods.
I decided on the six (for various reasons), and yes, I was fully aware of the issues with the in-line engine after all the chitchat on this website and also conversations with 'folks' who have experience rebuilding and improving these units.
I simply wished to establish a strong engine for reliable road use. Also, my expectations regarding mileage is around 5k miles per year, therefore 100k between rebuild is not an issue for me.
I have kept a watching brief over all the suggestions and alternatives to either correct initial design flaws, materials and QA of parts or improvements to extract further power / delivery or longevity.... the eternal compromise that all engine designers attempts to balance.
A 'well cared for' SpeedSix with an engine that needed a re-build was for sale locally, so for me this was an excellent opportunity.
I decided that TVR Power should complete the rebuild.
I will admit that I had to be patient and there were a number of issues that we had to resolve, such as a new starter motor and a replacement 1/2 time bearing which required the engine to come out again!
So, the reason I now place these words on this forum is simply due to what I regard as the completion of the rebuild, the re-mapping of the ECU. This was actually done by John Ravenscroft. The engine now is, as I believe it should be, simply having a very strong smooth delivery of torque as the revs rise….. actually very very smooth.
Yes, it did take a long time to sort and there were repairs along the way following the rebuild, however, I'm now seriously pleased at the end result and I do have confidence that the work Dom and his team has completed on my 4.0ltr is certainly producing the goods.
PeterT said:
So, the reason I now place these words on this forum is simply due to what I regard as the completion of the rebuild, the re-mapping of the ECU. This was actually done by John Ravenscroft. The engine now is, as I believe it should be, simply having a very strong smooth delivery of torque as the revs rise….. actually very very smooth.
Was that done via TVR Power or directly with John Ravenscroft? Why did he/Power/you decide a remap was necessary? I decided that a re-map was necessary. I was never happy with the way the engine behaved during warm-up and at operating temps. The mechanical build of the engine is one thing, however the ignition and fuel settings complete the package. During the rebuild there were a few minor changes that may have effected fueling, such as the cleaning of the ports and ceramic coating of the exhaust. Also, the earlier mapping gave issues with the emissions at the time of MOT ( even with new cats! )
TVR Power has had their rolling road operational for a few months now but are still learning the finer art of re-mapping the MBE ECU - not any piggy-back unit. Dom suggested that I call John and he was happy to come in person to do the re-map.
With the re-map, there are a number of significant improvements:-
- It actually starts better (seems to be less load on the starter).
- Warms-up more quickly and it's less rough when cold.
- Just seems smoother all the way through the revs when warm.
Oh - as well as improved torque and Bhp.
TVR Power has had their rolling road operational for a few months now but are still learning the finer art of re-mapping the MBE ECU - not any piggy-back unit. Dom suggested that I call John and he was happy to come in person to do the re-map.
With the re-map, there are a number of significant improvements:-
- It actually starts better (seems to be less load on the starter).
- Warms-up more quickly and it's less rough when cold.
- Just seems smoother all the way through the revs when warm.
Oh - as well as improved torque and Bhp.
Mr Freefall said:
PeterT said:
Oh - as well as improved torque and Bhp.
By how much can I enquire?Mr F
PeterT said:
SimonSparrow said:
Does this imply that TVR Power can now re-map the MBE? If so, thats good news.
No implication.... TVR Power can re-map MBE and burn new chips. This and with the their rolling road set-up is certainly good news.
SimonSparrow said:
PeterT said:
SimonSparrow said:
Does this imply that TVR Power can now re-map the MBE? If so, thats good news.
No implication.... TVR Power can re-map MBE and burn new chips. This and with the their rolling road set-up is certainly good news.
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