DavidJ
Well-Known Member
Yes exhaust elbow is the word
if you do take a pic I would suggest a new post with a suitable title that will draw the experts to the issue.
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Sunseeker 375 Portofino - The journey so far
- Thread starter mustiquee
- Start date
if you do take a pic I would suggest a new post with a suitable title that will draw the experts to the issue.
petem
Well-Known Member
Fouling and/or knackered turbos (assuming originals) without a doubt.
Spongesaki
New Member
Hi guys. A friend of mine was cruising with me today and was sitting in the engine room as i increased power to plane. He says both engines seem to be as powerful and kompressors and turbos kick in as they should. We also tested the ”weak” engine by dropping power from the good engine while planing and it performed well. Like turbo is okay-well.
So our thoughts turned to the sensors/”brain box” that gives information to the gauges. Can the fault be there ? That it is just getting wrong info to the gauges or... very confusing :/ . Theres another thing: the lever also goes futher on the”weak” engine” than the other one when hitting full throttle but we checked that both throttles on the engine end go as full as they can....
And with smaller revs the levers are aligned but when adding revs, the other lever needs to be pushed more and they get uneven... it also does not give the same full revs even though the lever goes even further.... it’s like the throttle wire would stretch
all ideas are wellcome, i appreciate it !
So our thoughts turned to the sensors/”brain box” that gives information to the gauges. Can the fault be there ? That it is just getting wrong info to the gauges or... very confusing :/ . Theres another thing: the lever also goes futher on the”weak” engine” than the other one when hitting full throttle but we checked that both throttles on the engine end go as full as they can....
And with smaller revs the levers are aligned but when adding revs, the other lever needs to be pushed more and they get uneven... it also does not give the same full revs even though the lever goes even further.... it’s like the throttle wire would stretch
all ideas are wellcome, i appreciate it !Spongesaki
New Member
dragoon
Well-Known Member
After the kompressors disengage do the gauges align again? If they do, my money is still on a slipping belt - which causes the alternator to turn more slowly and this is reflected on the gauges.
Mr Googler
Well-Known Member
Bit of a confusing post.
You can’t “see” if a turbo is working at decent boost by looking at the engines.
cables can stretch yes.
Ignoring where the levers are in relation to each other as all they do is move a lever on the engine…..if the lever on the fuel pumps goes all the way to the stops on both engines and you are not making full revs….take the exhaust elbow off and take a picture of the exhaust side turbo wheel as already suggested.
You can’t “see” if a turbo is working at decent boost by looking at the engines.
cables can stretch yes.
Ignoring where the levers are in relation to each other as all they do is move a lever on the engine…..if the lever on the fuel pumps goes all the way to the stops on both engines and you are not making full revs….take the exhaust elbow off and take a picture of the exhaust side turbo wheel as already suggested.
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Spongesaki
New Member
No they align only when coming back to revs like 1400 range and under. More than that, the levers start making difference between each other. Did you have a part number or place to search for the pulleys to sort that belt slipping probem ? Thanks !
Spongesaki
New Member
Yes sorry my english is crap
I didnt mean he sees the turbo working but he has assembled and raced for 15 years so he does have a clue on how the engines sound and feel and if the power is there and especially the feel if the power is not there or one turbo short of the other. But also the mentioned exhaust elbow will also be taken off so we get a pic and see what it looks like in there. Thanks !
dragoon
Well-Known Member
Check your belt tension. If you still have the old pulley tensioner system, it can be upgraded - KAD42 KAD43 Belt tensioner upgrade kit 877180
If you want to be sure the turbo and compressor are delivering boost correctly, the clearest way is to get a cheap boost gauge installed. Somewhere there will be a plug bolt you can remove and replace with a nipple / bango fitting for this purpose. I expect on the inlet manifold.
