Racing Green demonstrator driven
Discussion
Getsis said:
Looks like there could be a few ponies more to come out. Syvecs could be being over protective of the engine, it is retarding the ignition due to knock, hopefully this will be sorted shortly.
get some 99 in there. It should give you a good gain over an MBE engine as it can run optimised.
What were you doing with 95 in there anyway? A spot of mini cabbing?
Getsis said:
DonkeyApple said:
get some 99 in there. It should give you a good gain over an MBE engine as it can run optimised.
What were you doing with 95 in there anyway? A spot of mini cabbing?
At least you can have a map now for this.
JonRB said:
DonkeyApple said:
At least you can have a map now for this.
You don't need a specific map as such. I understand that Syvecs is intelligent enough to make best use of whatever petrol you throw at it. JonRB said:
DonkeyApple said:
That's interesting. I thought the knock sensors would retard timing when you put 95 in instead of say 97 but thought that if you had to use 91 it needed a map.
Oh! Perhaps you may be right there. Probably best to let Ryan answer that one then. Ryan Griffiths said:
...Also something to add for christmas list to go with the Syvecs. (Please Note Admin: i am not associated with the below product, It is made by JT Innovation to work with the Syvecs Range)
Allows you to change Map selection on the Touch Screen display also which can be labelled.
http://www.youtube.com/watch?v=eBSpn9jIvnQ
Ryan
If anyone has any questions about the Syvecs display unit, just let me know Allows you to change Map selection on the Touch Screen display also which can be labelled.
http://www.youtube.com/watch?v=eBSpn9jIvnQ
Ryan
Edited by timhardisty on Saturday 10th December 20:41
timhardisty said:
Not sure what the "mod" rules are, but there's a discounted price for the Syvecs display unit if you order in the next few days. Details on the website www.jti.uk.com
Probably best to remove the link as it will be seen as an advert. Another member has posted it earlier which is fine.
Can't see a mod getting upset if you are able to answer questions without promoting. That would be usefull.
Afternoon Gents
Â
The SpeedSix Engine in its stock form and both with the 4.5 or FFF package is a Knock limited engine on pump fuel. What i mean by this is that the engine will knock at wot before its gets to MBT where the engine produces its best torque in the engines rev range. In order to find MBT on a SpeedSix Racefuel will be required unless the engine has a slighty lower CR but i don't think its far off from MBT on 99ron and certainly feel the CR Tvr choose was spot on for road fuel.
Â
This is why the Knock Control on the Syvecs has enabled speed sixes to make more power safely over the stock Ecu as you can set the ignition timing closer to knock threshold and allow the knock control to keep the combustion stable.
On Getsis car it was not allowing much timing at all in the front 3 cylinders and the knock control was kicking in to protect these cylinders. I confirmed by turning off knock control and putting det cans on the engine. It knows which cylinder it's in btw as the sensors listen in a set window in the combustion based on the firing on the ignition. This requires a cam sensor btw for 720 sync.
It's also only listens at frequencys around 5.5hkz which is the ideal freq based on the bore size of the cylinder.
So I have asked Dom to check the cat on bank 1 as if this was blocked slighty it would cause a big issue in back pressures and cylinder temps which will cause the cylinders to not accept as much timing as the rear. Would also explain why Getsis has commented on cabin temps being hotter..
Another possibility is a weak pump which will cause fuel pressure dropping across the rail as fuel enters at the rear but doubt it....
None of the Syvecs speed six setups allow the knock control to advance timing passed the set timing so if better fuel is put in the Syvecs over its current map it will require a tweak. It's best to have a proper map for the fuel so the knock control does not have its work cut out
Ryan
Â
The SpeedSix Engine in its stock form and both with the 4.5 or FFF package is a Knock limited engine on pump fuel. What i mean by this is that the engine will knock at wot before its gets to MBT where the engine produces its best torque in the engines rev range. In order to find MBT on a SpeedSix Racefuel will be required unless the engine has a slighty lower CR but i don't think its far off from MBT on 99ron and certainly feel the CR Tvr choose was spot on for road fuel.
Â
This is why the Knock Control on the Syvecs has enabled speed sixes to make more power safely over the stock Ecu as you can set the ignition timing closer to knock threshold and allow the knock control to keep the combustion stable.
On Getsis car it was not allowing much timing at all in the front 3 cylinders and the knock control was kicking in to protect these cylinders. I confirmed by turning off knock control and putting det cans on the engine. It knows which cylinder it's in btw as the sensors listen in a set window in the combustion based on the firing on the ignition. This requires a cam sensor btw for 720 sync.
It's also only listens at frequencys around 5.5hkz which is the ideal freq based on the bore size of the cylinder.
So I have asked Dom to check the cat on bank 1 as if this was blocked slighty it would cause a big issue in back pressures and cylinder temps which will cause the cylinders to not accept as much timing as the rear. Would also explain why Getsis has commented on cabin temps being hotter..
Another possibility is a weak pump which will cause fuel pressure dropping across the rail as fuel enters at the rear but doubt it....
None of the Syvecs speed six setups allow the knock control to advance timing passed the set timing so if better fuel is put in the Syvecs over its current map it will require a tweak. It's best to have a proper map for the fuel so the knock control does not have its work cut out
Ryan
Ryan Griffiths said:
Afternoon Gents
Â
The SpeedSix Engine in its stock form and both with the 4.5 or FFF package is a Knock limited engine on pump fuel. What i mean by this is that the engine will knock at wot before its gets to MBT where the engine produces its best torque in the engines rev range. In order to find MBT on a SpeedSix Racefuel will be required unless the engine has a slighty lower CR but i don't think its far off from MBT on 99ron and certainly feel the CR Tvr choose was spot on for road fuel.
Â
This is why the Knock Control on the Syvecs has enabled speed sixes to make more power safely over the stock Ecu as you can set the ignition timing closer to knock threshold and allow the knock control to keep the combustion stable.
On Getsis car it was not allowing much timing at all in the front 3 cylinders and the knock control was kicking in to protect these cylinders. I confirmed by turning off knock control and putting det cans on the engine. It knows which cylinder it's in btw as the sensors listen in a set window in the combustion based on the firing on the ignition. This requires a cam sensor btw for 720 sync.
It's also only listens at frequencys around 5.5hkz which is the ideal freq based on the bore size of the cylinder.
So I have asked Dom to check the cat on bank 1 as if this was blocked slighty it would cause a big issue in back pressures and cylinder temps which will cause the cylinders to not accept as much timing as the rear. Would also explain why Getsis has commented on cabin temps being hotter..
Another possibility is a weak pump which will cause fuel pressure dropping across the rail as fuel enters at the rear but doubt it....
None of the Syvecs speed six setups allow the knock control to advance timing passed the set timing so if better fuel is put in the Syvecs over its current map it will require a tweak. It's best to have a proper map for the fuel so the knock control does not have its work cut out
Ryan
Hi Ryan,Â
The SpeedSix Engine in its stock form and both with the 4.5 or FFF package is a Knock limited engine on pump fuel. What i mean by this is that the engine will knock at wot before its gets to MBT where the engine produces its best torque in the engines rev range. In order to find MBT on a SpeedSix Racefuel will be required unless the engine has a slighty lower CR but i don't think its far off from MBT on 99ron and certainly feel the CR Tvr choose was spot on for road fuel.
Â
This is why the Knock Control on the Syvecs has enabled speed sixes to make more power safely over the stock Ecu as you can set the ignition timing closer to knock threshold and allow the knock control to keep the combustion stable.
On Getsis car it was not allowing much timing at all in the front 3 cylinders and the knock control was kicking in to protect these cylinders. I confirmed by turning off knock control and putting det cans on the engine. It knows which cylinder it's in btw as the sensors listen in a set window in the combustion based on the firing on the ignition. This requires a cam sensor btw for 720 sync.
It's also only listens at frequencys around 5.5hkz which is the ideal freq based on the bore size of the cylinder.
So I have asked Dom to check the cat on bank 1 as if this was blocked slighty it would cause a big issue in back pressures and cylinder temps which will cause the cylinders to not accept as much timing as the rear. Would also explain why Getsis has commented on cabin temps being hotter..
Another possibility is a weak pump which will cause fuel pressure dropping across the rail as fuel enters at the rear but doubt it....
None of the Syvecs speed six setups allow the knock control to advance timing passed the set timing so if better fuel is put in the Syvecs over its current map it will require a tweak. It's best to have a proper map for the fuel so the knock control does not have its work cut out
Ryan
Thanks for that informative post. Could you confirm that I understand this correctly, please?
1. Syvecs will retard timing in the event that detonation is detected by the knock sensors.
2. Syvecs will not advance timing beyond pre-determined limits which are set during mapping.
3. Syvecs can be mapped for race type fuels in addition to the usual 99RON so you can have a 99RON map and a race fuel map.
If 3. is correct then if you switch to the 99RON map which timing limits apply - the max advance from the race fuel map or the max advance from the 99RON map?
Thanks,
J
jcpgasoline said:
Hi Ryan,
Thanks for that informative post. Could you confirm that I understand this correctly, please?
1. Syvecs will retard timing in the event that detonation is detected by the knock sensors.
2. Syvecs will not advance timing beyond pre-determined limits which are set during mapping.
3. Syvecs can be mapped for race type fuels in addition to the usual 99RON so you can have a 99RON map and a race fuel map.
If 3. is correct then if you switch to the 99RON map which timing limits apply - the max advance from the race fuel map or the max advance from the 99RON map?
Thanks,
J
Hi JThanks for that informative post. Could you confirm that I understand this correctly, please?
1. Syvecs will retard timing in the event that detonation is detected by the knock sensors.
2. Syvecs will not advance timing beyond pre-determined limits which are set during mapping.
3. Syvecs can be mapped for race type fuels in addition to the usual 99RON so you can have a 99RON map and a race fuel map.
If 3. is correct then if you switch to the 99RON map which timing limits apply - the max advance from the race fuel map or the max advance from the 99RON map?
Thanks,
J
1.) Correct
2.) It will not advance timing beyond values which are set in the Ignition map selected but it Can be set to advance also if a customer wanted. I do not recommend this.
3.) Correct, you can have up to 4 Different Ignition maps selectable through a cal switch.
If you select a race fuel map then it will limit the timing to what is set in that ignition map. If you went to then 99ron map it then goes back to other ignition timing table. But with the knock control being there you can run the engine very close to the knock threshold.
Ryan
Mattt said:
So the Cal switch just adjusts the ignition map? The fuelling stays identical with all settings?
It has 8 Postions which you can set to have literally what ever you want.So say for using race fuel which is oxygenated you can adust the ignition, fuel, cam angle, closed loop lambda targets, traction levels, have any functions which the ecu can control adjusted.
Ryan
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