Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 15, 2019 17:59:24 GMT
would have thought with it having the legs on you that you would be taking advantage of everything that might slow Mouse downΒ Β Β Don't tell him but I've a soft spot for that old Perky π»ππ€« That's on a 1:1 TMP box with no flywheel weight so I'm taking cues from that as well - it spins up quite hard enough with no turbo π€¬π
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 15, 2019 18:03:01 GMT
Have fun ! Guiness and 6N for me ... I understand both those Rog If I pull my finger out I may manage both - although Mrs Gazza is going for a 10 mile run in the morning, she is in training for a half marathon at Bedford Autodrome on mothering Sunday l, we invented the IC engine so you didn't need to use Shank's Pony π€¦ββοΈπ My start time hinges on her finish time, if she is late back from her run I'll have to make do with 5 Live π€¬
|
|
|
Post by mouse on Mar 15, 2019 22:54:21 GMT
would have thought with it having the legs on you that you would be taking advantage of everything that might slow Mouse down Mouse is very easily slowed down by having a beer or a Grouse (preferably) WAVED UNDER HIS NOSE!
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 16, 2019 5:51:02 GMT
would have thought with it having the legs on you that you would be taking advantage of everything that might slow Mouse downΒ Β Β It's funny you should say that mind - one of the sage old boy's down the club (a damn fine retired fitter) said to me 'why are you farting about putting this bloody turbo on when all you need do is wind dad's throttle stop in!' I gave him the Everest answer, but; being completely honest - he's got a valid point π€«ππ»
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 16, 2019 7:01:18 GMT
As for the flywheel that is going on:-
I weighed it at work yesterday on our accurate large parcels scales; 25.1 KG, more than enough I would have thought. I'd guess the one coming off would be around 25% heavier than that. I will weigh it just to satisfy my curiosity.
My boss was horrified - the latest engine build on their 205 rally car saw the fitment of a lightened flywheel, tipping the scales at a dainty 3.9kg π§
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 17, 2019 14:53:45 GMT
The monster flywheel wrestled free from the engine As ever nothing was particularly straightforward - I was sceptical there would be enough space to lift the engine at the rear only to clear the engine mount studs -they are a bobbin type mount so it had to come upwards rather than taking a couple of bolts out and slip the mounts off. Never mind, Iβll disc the excess stud threads off (worth about 3/4βof extra height I would have had to lift the engine) and give it a go. No dice π€¬ short of clearing the studs by about 1β - the head mounted heat exchanger was fouling the bulkhead - right, off it comes! Succes!! It just cleared the studs - quickly took the adapter plate off, slipped the new flywheel on, adapter plate back on and drop it back on its studs. Phew! π So the replacement flywheel is on, torqued up along with the drive plate refitted and centred ready to take the box. This Thursday is another big push to get it ready for Sunday week. But! As ever one job gets another, the last time I saw the underside of the heat exchanger was 9 years ago, you need to have a tame talking bat to be able to see what is going on under there due to its location - well, with it off in my hand I could see the telltale early signs of a failing pair of tube stack seals π€¦πΌββοΈ Iβve never had this to bits, it was ok 9 years ago but is not going back on without some attention - sadly, this can be a pretty awkward task - pulling end caps off that have been in place for donkeys years can be an utter bastard, itβs certainly not a job to do without all the tools I have at my disposal in a decently equipped workshop. In time honoured fashion more pictures later π
|
|
|
Post by JohnV on Mar 17, 2019 15:17:07 GMT
The monster flywheel wrestled free from the engine by heck that is a monster
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 17, 2019 15:22:36 GMT
The monster flywheel wrestled free from the engine by heck that is a monster Iβm going to bring the scales home to weigh it - Iβm already fed up of shifting it about! It makes sense on something with a big prop to keep the inertia up, or a lumpy old twin, bit on a whizzy 1:1 4 pot that is pretty smooth anyway itβs more than a bit excessive! Most BMC kit (including my brothers DC30) run automotive flywheels with no detriment to performance or smoothness. Another benefit with the weight loss programme is more beer can be carried π»πππ
|
|
|
Post by JohnV on Mar 17, 2019 15:31:18 GMT
by heck that is a monster Iβm going to bring the scales home to weigh it - Iβm already fed up of shifting it about! It makes sense on something with a big prop to keep the inertia up, or a lumpy old twin, bit on a whizzy 1:1 4 pot that is pretty smooth anyway itβs more than a bit excessive! Most BMC kit (including my brothers DC30) run automotive flywheels with no detriment to performance or smoothness. Another benefit with the weight loss programme is more beer can be carried π»πππ if you were close enough I would be after it to add to my ballast heap
|
|
|
Post by Jim on Mar 20, 2019 17:24:25 GMT
The monster flywheel wrestled free from the engine As ever nothing was particularly straightforward - I was sceptical there would be enough space to lift the engine at the rear only to clear the engine mount studs -they are a bobbin type mount so it had to come upwards rather than taking a couple of bolts out and slip the mounts off. Never mind, Iβll disc the excess stud threads off (worth about 3/4βof extra height I would have had to lift the engine) and give it a go. No dice π€¬ short of clearing the studs by about 1β - the head mounted heat exchanger was fouling the bulkhead - right, off it comes! Succes!! It just cleared the studs - quickly took the adapter plate off, slipped the new flywheel on, adapter plate back on and drop it back on its studs. Phew! π So the replacement flywheel is on, torqued up along with the drive plate refitted and centred ready to take the box. This Thursday is another big push to get it ready for Sunday week. But! As ever one job gets another, the last time I saw the underside of the heat exchanger was 9 years ago, you need to have a tame talking bat to be able to see what is going on under there due to its location - well, with it off in my hand I could see the telltale early signs of a failing pair of tube stack seals π€¦πΌββοΈ Iβve never had this to bits, it was ok 9 years ago but is not going back on without some attention - sadly, this can be a pretty awkward task - pulling end caps off that have been in place for donkeys years can be an utter bastard, itβs certainly not a job to do without all the tools I have at my disposal in a decently equipped workshop. In time honoured fashion more pictures later π You are now the proud owner of a decent mud weight!
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 20, 2019 17:36:46 GMT
The monster flywheel wrestled free from the engine As ever nothing was particularly straightforward - I was sceptical there would be enough space to lift the engine at the rear only to clear the engine mount studs -they are a bobbin type mount so it had to come upwards rather than taking a couple of bolts out and slip the mounts off. Never mind, Iβll disc the excess stud threads off (worth about 3/4βof extra height I would have had to lift the engine) and give it a go. No dice π€¬ short of clearing the studs by about 1β - the head mounted heat exchanger was fouling the bulkhead - right, off it comes! Succes!! It just cleared the studs - quickly took the adapter plate off, slipped the new flywheel on, adapter plate back on and drop it back on its studs. Phew! π So the replacement flywheel is on, torqued up along with the drive plate refitted and centred ready to take the box. This Thursday is another big push to get it ready for Sunday week. But! As ever one job gets another, the last time I saw the underside of the heat exchanger was 9 years ago, you need to have a tame talking bat to be able to see what is going on under there due to its location - well, with it off in my hand I could see the telltale early signs of a failing pair of tube stack seals π€¦πΌββοΈ Iβve never had this to bits, it was ok 9 years ago but is not going back on without some attention - sadly, this can be a pretty awkward task - pulling end caps off that have been in place for donkeys years can be an utter bastard, itβs certainly not a job to do without all the tools I have at my disposal in a decently equipped workshop. In time honoured fashion more pictures later π You are now the proud owner of a decent mud weight! No I'm not, it hasn't got British Seagull written on it π§ππ
|
|
|
Post by mouse on Mar 20, 2019 17:39:57 GMT
The monster flywheel wrestled free from the engine by heck that is a monster Last time I saw something like that was the 200lb jobbies we used to use on Gen Sets at GM Wellingborough.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 20, 2019 18:02:19 GMT
by heck that is a monster Last time I saw something like that was the 200lb jobbies we used to use on Gen Sets at GM Wellingborough. It's not quite that heavy - I'd struggle to lift that on me tod! I'll bring the scales home Friday when they are not needed over the weekend - ought to do the Thunderboat guess the weight of the flywheel competition. First prize a signed coconut πππ
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 1, 2019 20:02:09 GMT
A small update - mouse and I did get out the other Sunday - engine performed very well. Cooling efficiency is perfect now the heat exchanger has had some love - no need to alter the pump speed to up the flow rate. No detriment whatsoever running the lighter flywheel - still smooth and much more willing to rev than with the monster fitted. Performance on the water was good, I only had the boost at 5 psi - nowhere really deep enough for long enough between Titchmarsh and Oundle to really run it hard. So fitting it has given another 300 rpm at 5 psi boost - a little under what I may have hoped for - I think I can run it up to 8 or possibly 10psi safely but will go for pushing the envelope in steady increments - I want to get some hours on it before I go and wind the wick up anymore. Torque is vastly improved - running the 1000w inverter with the kettle on no longer makes the engine labour as much - she sits at 2100 rpm + without feeling stressed and is also very quite with the new exhaust system, the turbo taking a lot of energy out of the exhaust helps massively too. Fueling seems bang on and temperatures were stable and safe. Running at 2100rpm the readings are as follows T1 = Charge air in T2 = Charge air out Both measured on the external surface of the stainless Intercooler pipe work - it doesnβt tell me the actual temperature of the compressed charge air but gives a good comparison of relative Intercooler efficiency T3 = Exhaust gas temperature at the wet exhaust mixer elbow, at idle this rises to around 65c due to the reduction in water flow from the raw water pump. T4 = Exhaust gas temperature at the turbine inlet, plenty safe enough - 600 degrees is starting to get hot! I am going to do a bit more bracing to the turbo/manifold/head, there is a bit of resonant vibration to the turbo at 750 rpm, slower and the idle speed is too low for my liking- if I speed the idle up to smooth it out we are at around 850-900 rpm, more than enough to piss the slow down nutters off in March! So bar for a little bit of scaffolding we are pretty much close to were I want to be, I am toying with the idea of taking an inch of pitch out of the prop when we are on the slip but that may depend on Clements Marine lead times- if they canβt turn it around in two weeks I may leave it until we go on the hard again next year. I did an oil change on both the engine and box when we got back, Iβm trying some Motul 15/50 CD oil now the turbo is in action. The box got a fresh glug of ATF.
|
|
|
Post by peterboat on Apr 1, 2019 20:48:48 GMT
A small update - mouse and I did get out the other Sunday - engine performed very well. Cooling efficiency is perfect now the heat exchanger has had some love - no need to alter the pump speed to up the flow rate. No detriment whatsoever running the lighter flywheel - still smooth and much more willing to rev than with the monster fitted. Performance on the water was good, I only had the boost at 5 psi - nowhere really deep enough for long enough between Titchmarsh and Oundle to really run it hard. So fitting it has given another 300 rpm at 5 psi boost - a little under what I may have hoped for - I think I can run it up to 8 or possibly 10psi safely but will go for pushing the envelope in steady increments - I want to get some hours on it before I go and wind the wick up anymore. Torque is vastly improved - running the 1000w inverter with the kettle on no longer makes the engine labour as much - she sits at 2100 rpm + without feeling stressed and is also very quite with the new exhaust system, the turbo taking a lot of energy out of the exhaust helps massively too. Fueling seems bang on and temperatures were stable and safe. Running at 2100rpm the readings are as follows T1 = Charge air in T2 = Charge air out Both measured on the external surface of the stainless Intercooler pipe work - it doesnβt tell me the actual temperature of the compressed charge air but gives a good comparison of relative Intercooler efficiency T3 = Exhaust gas temperature at the wet exhaust mixer elbow, at idle this rises to around 65c due to the reduction in water flow from the raw water pump. T4 = Exhaust gas temperature at the turbine inlet, plenty safe enough - 600 degrees is starting to get hot! I am going to do a bit more bracing to the turbo/manifold/head, there is a bit of resonant vibration to the turbo at 750 rpm, slower and the idle speed is too low for my liking- if I speed the idle up to smooth it out we are at around 850-900 rpm, more than enough to piss the slow down nutters off in March! So bar for a little bit of scaffolding we are pretty much close to were I want to be, I am toying with the idea of taking an inch of pitch out of the prop when we are on the slip but that may depend on Clements Marine lead times- if they canβt turn it around in two weeks I may leave it until we go on the hard again next year. I did an oil change on both the engine and box when we got back, Iβm trying some Motul 15/50 CD oil now the turbo is in action. The box got a fresh glug of ATF. Great stuff Gazza, I removed 3 inches of my Prop, and this has made it much nicer, I have gained 300rpm and that was with flat batteries, I have now connected solar up to the drive batteries, and they will be fully charged soon, so I may get more RPM after that?
I dont really want to take anymore off the diameter, so the next chop if needed will be off the leading edge of the blade, but I will leave that until cooling to the motor is fitted later this week
|
|