Corleones new engine is running
04-02-2010, 08:36 AM
#181
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Phuzion gasket? I liked the concept but was not wild about the execution.
The teeth on the cam trigger are quite close to the teeth of the cam gear – any false triggers?
I would suggest going to a crank trigger – there is a loss of definition with cam triggers. That might not be a problem with a ‘typical’ street engine – but with the power levels you have every bit of accuracy with the spark timing is important!
No knock sensor?....
The teeth on the cam trigger are quite close to the teeth of the cam gear – any false triggers?
I would suggest going to a crank trigger – there is a loss of definition with cam triggers. That might not be a problem with a ‘typical’ street engine – but with the power levels you have every bit of accuracy with the spark timing is important!
No knock sensor?....
04-02-2010, 09:37 AM
#182
Racer
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The 4 hose from the head is wented to the cool side of the cooler by a 4 to 1 collector. Cooling system is not as usual, the routings is different...
04-02-2010, 09:45 AM
#183
Racer
Thread Starter
Phuzion gasket? I liked the concept but was not wild about the execution.
The teeth on the cam trigger are quite close to the teeth of the cam gear – any false triggers?
I would suggest going to a crank trigger – there is a loss of definition with cam triggers. That might not be a problem with a ‘typical’ street engine – but with the power levels you have every bit of accuracy with the spark timing is important!
No knock sensor?....
The teeth on the cam trigger are quite close to the teeth of the cam gear – any false triggers?
I would suggest going to a crank trigger – there is a loss of definition with cam triggers. That might not be a problem with a ‘typical’ street engine – but with the power levels you have every bit of accuracy with the spark timing is important!
No knock sensor?....
Actually no problems what so ever with the trigger, I have had an oscilloskop and it works without problems. We have also checked so the ign is stable to the map in higher revs and it is.
I have 2 knocksensors and connected to the Link, it lowers the ign if above the target values. When I tuned I did listen with earphones attached to Link knock box. Without problems.
It would be nice if someone like you Chris posted a ignition map for similar power. My ignition has been about 36 degrees at 7 krpm and 1.25 bar, of course with E85. I did tune on gas first so I had something to start with.
04-02-2010, 05:37 PM
#185
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04-03-2010, 09:07 AM
#186
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Yes, Phuzion.
Actually no problems what so ever with the trigger, I have had an oscilloskop and it works without problems. We have also checked so the ign is stable to the map in higher revs and it is.
I have 2 knocksensors and connected to the Link, it lowers the ign if above the target values. When I tuned I did listen with earphones attached to Link knock box. Without problems.
It would be nice if someone like you Chris posted a ignition map for similar power. My ignition has been about 36 degrees at 7 krpm and 1.25 bar, of course with E85. I did tune on gas first so I had something to start with.
Actually no problems what so ever with the trigger, I have had an oscilloskop and it works without problems. We have also checked so the ign is stable to the map in higher revs and it is.
I have 2 knocksensors and connected to the Link, it lowers the ign if above the target values. When I tuned I did listen with earphones attached to Link knock box. Without problems.
It would be nice if someone like you Chris posted a ignition map for similar power. My ignition has been about 36 degrees at 7 krpm and 1.25 bar, of course with E85. I did tune on gas first so I had something to start with.
At half the speed you lose half the resolution and any flexing of the belt will introduce a timing error – do I think either of these is a serious problem? No – but I usually prefer to get the most accurate signal I can!
As for posting timing maps – not a good idea – I could do more damage than good. There are so many variables in a modified engine - boost level, fuel, cam, turbo efficiency, head mods, crank throw, sensor placement variations and planned engine use that posting a timing curve doesn’t really help. Somebody may take the curve and use it on a different engine and destroy it…
For example – somebody may read 36 degrees of timing at 1.25 bar and try it on their gas engine….boom….
04-03-2010, 10:07 AM
#187
Racer
Thread Starter
There are two problems with cam triggers – the cam is turning at half the engein speed and belt stretch / flex.
At half the speed you lose half the resolution and any flexing of the belt will introduce a timing error – do I think either of these is a serious problem? No – but I usually prefer to get the most accurate signal I can!
As for posting timing maps – not a good idea – I could do more damage than good. There are so many variables in a modified engine - boost level, fuel, cam, turbo efficiency, head mods, crank throw, sensor placement variations and planned engine use that posting a timing curve doesn’t really help. Somebody may take the curve and use it on a different engine and destroy it…
For example – somebody may read 36 degrees of timing at 1.25 bar and try it on their gas engine….boom….
At half the speed you lose half the resolution and any flexing of the belt will introduce a timing error – do I think either of these is a serious problem? No – but I usually prefer to get the most accurate signal I can!
As for posting timing maps – not a good idea – I could do more damage than good. There are so many variables in a modified engine - boost level, fuel, cam, turbo efficiency, head mods, crank throw, sensor placement variations and planned engine use that posting a timing curve doesn’t really help. Somebody may take the curve and use it on a different engine and destroy it…
For example – somebody may read 36 degrees of timing at 1.25 bar and try it on their gas engine….boom….
About the ign maps, I am just curious about others as I have done about 75-100 ones to come to this point. Most people (experts) has told me that its not possible to have that ignition I have. Of course most rise is coming after you passed max torque. Fuel is a lot easier and do not take that time at all.
04-03-2010, 10:32 AM
#188
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E85 is a completely different tune.
36 degrees @ 1.25 bar would destroy a gasoline powered 944 turbo…I would love to design, build and tune an E85 motor – but E85 is not easy to find around here…
36 degrees @ 1.25 bar would destroy a gasoline powered 944 turbo…I would love to design, build and tune an E85 motor – but E85 is not easy to find around here…
04-03-2010, 01:18 PM
#189
Racer
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Yes, the difference is enormous with E85. I hope to reach 600 rwhp in the Rototest this year with no more than 1.35 bar of boost.
04-03-2010, 08:28 PM
#190
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About Chris's point on the trigger set up when pushing the last from a petrol tune you are hunting for the last half a degree of advance and you simply don' t have that accuracy with a cam set up .
when tuning with E85 although you push the timing are you perhaps not pushing the timing as close to knock as a petrol tune ??
so is e85 a tad less fussy for timing ?
when tuning with E85 although you push the timing are you perhaps not pushing the timing as close to knock as a petrol tune ??
so is e85 a tad less fussy for timing ?
04-04-2010, 12:59 AM
#191
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I would think that 36o is sailing right up next to knock, no?
04-04-2010, 01:25 AM
#192
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well thats what i'm asking I believe there is a few more degrees between max power and knock when you go up in octane ..can any one confirm or deny this please ?
last time i was tuning 105 octane (long time ) lpg it wouldn't just wouldn't knock it would start to make less power ..
last time i was tuning 105 octane (long time ) lpg it wouldn't just wouldn't knock it would start to make less power ..
04-04-2010, 02:30 AM
#193
Formula One Spin Doctor
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Some updates...
I have had a gasring that had went into the cylinder, strange... probably it has been so since start.
Head is modified to evacuate air in the cooling system.
MLS is glued beween all layers.
Camshaft is exactly measured in now.
Still i had 563 rwp last year, hopefully it will be some more this year...
I have had a gasring that had went into the cylinder, strange... probably it has been so since start.
Head is modified to evacuate air in the cooling system.
MLS is glued beween all layers.
Camshaft is exactly measured in now.
Still i had 563 rwp last year, hopefully it will be some more this year...
Yes, Phuzion.
Actually no problems what so ever with the trigger, I have had an oscilloskop and it works without problems. We have also checked so the ign is stable to the map in higher revs and it is.
I have 2 knocksensors and connected to the Link, it lowers the ign if above the target values. When I tuned I did listen with earphones attached to Link knock box. Without problems.
It would be nice if someone like you Chris posted a ignition map for similar power. My ignition has been about 36 degrees at 7 krpm and 1.25 bar, of course with E85. I did tune on gas first so I had something to start with.
Actually no problems what so ever with the trigger, I have had an oscilloskop and it works without problems. We have also checked so the ign is stable to the map in higher revs and it is.
I have 2 knocksensors and connected to the Link, it lowers the ign if above the target values. When I tuned I did listen with earphones attached to Link knock box. Without problems.
It would be nice if someone like you Chris posted a ignition map for similar power. My ignition has been about 36 degrees at 7 krpm and 1.25 bar, of course with E85. I did tune on gas first so I had something to start with.
What CR is your engine ?
well thats what i'm asking I believe there is a few more degrees between max power and knock when you go up in octane ..can any one confirm or deny this please ?
last time i was tuning 105 octane (long time ) lpg it wouldn't just wouldn't knock it would start to make less power ..
last time i was tuning 105 octane (long time ) lpg it wouldn't just wouldn't knock it would start to make less power ..
knock system .....
04-04-2010, 09:19 AM
#194
Racer
Thread Starter
Be careful with e85 , I'm sure you are aware it is not 85 in the winter months, Intake and fuel temp is important you will have quenching , lifting the head. When doing so it will torch the block, that's how you lost the ring ....
Get away from the cam trigger , they are only good for 7000 rpm IMO...
What CR is your engine ?
High frequency detonation , you will detect no knock from conventional
knock system .....
Get away from the cam trigger , they are only good for 7000 rpm IMO...
What CR is your engine ?
High frequency detonation , you will detect no knock from conventional
knock system .....
Strange about the ring is that it have went into the cylinder, normally the cylinder pressure would have pushed the ring out from the cylinder...
CR is almost 9:1
No signs of knocks when looking at the pistons etc. so far...