Thanks for the tip about using a socket to keep the drill true love that simple but effective. That 930 had bundles of torque very impressive can't wait to see what you make of it in the husky.
Hi Andy this new 930cc engine would be an ideal one to add a turbo as it has the lower compression ratio that is normally what turbo's require to work properly!
Hi Andy, Another great video. I have my fuel filter exactly where you said it shouldn't be, and have experience the dreaded hot starting problem more than once! When you say it is better to install the fuel filter near the battery, I presume you have the filter on the pump outlet between the pump and the carb, rather than on the pump inlet?
Hi David. Not trying to hijack Andy’s video! But I would recommend an in tank filter. Robert pipcombe sells these amazing magnetic in-tank filters designed for an imp. They are great. Message me if you want me to put you in touch with him
A very good video on technical aspects of the Imp engine, I still would like to no now you seal the plate to increase the deck height ? Kit from down under
I've never got my head around why the dynamic CR is actually less in the real world than the static CR. (of course when being measured on a engine on the bench it will be less). I thought that the reason that the inlet valve was held open for several degrees of the compression stroke was that the inlet charge has inertia and therefore would still be forcing fresh charge into the engine even though the piston is on its way back up the bore.
Static CR is the actual cylinder volume compressed into the head. Dynamic CR is the cylinder volume after the intake valve closes, because the piston is part way up the bore when the intake valve closes. Dynamic CR depends on camshaft timing. You can draw a picture of the crank and rod on a sheet of paper with the actual measurements and using a protractor, you can figure the compression ratio at the intake valve closing point. It is the reason race cams are lumpy....because some of the combustion gets pushed back into the inlet manifold before the valve can close. Hope this helps to clarify the dynamic CR.
@@chrisval78 Hi Chris, thanks for your reply but you are looking at things from the point of view of the engine spinning at 1 rev per minute, or something like that. In the real world with the engine spinning at many hundred RPM things are different, in a well designed engine the inlet charge will continue to travel INTO the cylinder even after the piston has started to travel up the bore on the compression stroke, this is due to resonance and gas inertia, this is the reason why the inlet valve is held open for part of the compression stroke. This is the reason why I stated that i don't pay much attention to the dynamic CR. If this wasn't the case then cam designers would simply close the inlet valve earlier to avoid the fresh charge being pushed back into the inlet manifold, they don't because they want to use 'every trick in the book' to cram as much fresh charge into the cylinder as possible.
Good you took us through the new 930 engine, good bit of R and D for us all, good bit of PR for you. I'm thinking there will be a lot more development to come. Stage 1,2,3?
Love the 930 Andy - I’m going to be needing a new engine for Gracie (my 67 Imp Super) soon… that looks *very* interesting and maybe just what the car needs… will be in touch! 😎
Looking at the log style inlet manifold with the old Zenith carb, would a set of Strombergs yield a decent bit more power without sacrificing drivability?
What about a pair of stock Solex carb on a modified manifold? 🤔 Mini cooper style A Danish guy did that on his nimbus bike. I always wondered if this trick also works on Ford Kent's, twin stock twin-shokes webers
I initially thought you were playing with a datsun L series as from underneath the Datsun and Imp could be cousins when looking at the head from underneath so similar it isn't funny
great information
Thanks for the tip about using a socket to keep the drill true love that simple but effective. That 930 had bundles of torque very impressive can't wait to see what you make of it in the husky.
All good stuff Andy
Hi Andy this new 930cc engine would be an ideal one to add a turbo as it has the lower compression ratio that is normally what turbo's require to work properly!
Thanks Andy. Tell the viewers to hit the like button. Apparently it helps the algorithm share your posts with a wider audience. Just sayin'
Hi Andy, Another great video.
I have my fuel filter exactly where you said it shouldn't be, and have experience the dreaded hot starting problem more than once! When you say it is better to install the fuel filter near the battery, I presume you have the filter on the pump outlet between the pump and the carb, rather than on the pump inlet?
Hi David. Not trying to hijack Andy’s video! But I would recommend an in tank filter. Robert pipcombe sells these amazing magnetic in-tank filters designed for an imp. They are great. Message me if you want me to put you in touch with him
Nice tip with the socket on the drill. Looking forward to seeing the new engine test driven in the Husky!
It would be good to try some small choke webers on that standard spec motor. Downton always used to go for torque on a road motor.
A very good video on technical aspects of the Imp engine, I still would like to no now you seal the plate to increase the deck height ?
Kit from down under
I've never got my head around why the dynamic CR is actually less in the real world than the static CR. (of course when being measured on a engine on the bench it will be less). I thought that the reason that the inlet valve was held open for several degrees of the compression stroke was that the inlet charge has inertia and therefore would still be forcing fresh charge into the engine even though the piston is on its way back up the bore.
Static CR is the actual cylinder volume compressed into the head. Dynamic CR is the cylinder volume after the intake valve closes, because the piston is part way up the bore when the intake valve closes. Dynamic CR depends on camshaft timing. You can draw a picture of the crank and rod on a sheet of paper with the actual measurements and using a protractor, you can figure the compression ratio at the intake valve closing point. It is the reason race cams are lumpy....because some of the combustion gets pushed back into the inlet manifold before the valve can close. Hope this helps to clarify the dynamic CR.
@@chrisval78 Hi Chris, thanks for your reply but you are looking at things from the point of view of the engine spinning at 1 rev per minute, or something like that. In the real world with the engine spinning at many hundred RPM things are different, in a well designed engine the inlet charge will continue to travel INTO the cylinder even after the piston has started to travel up the bore on the compression stroke, this is due to resonance and gas inertia, this is the reason why the inlet valve is held open for part of the compression stroke. This is the reason why I stated that i don't pay much attention to the dynamic CR. If this wasn't the case then cam designers would simply close the inlet valve earlier to avoid the fresh charge being pushed back into the inlet manifold, they don't because they want to use 'every trick in the book' to cram as much fresh charge into the cylinder as possible.
Good you took us through the new 930 engine, good bit of R and D for us all, good bit of PR for you. I'm thinking there will be a lot more development to come. Stage 1,2,3?
Love the 930 Andy - I’m going to be needing a new engine for Gracie (my 67 Imp Super) soon… that looks *very* interesting and maybe just what the car needs… will be in touch! 😎
so if you advance the cam would that also change the dynamic compression
Another bril video. You've got that much on the go your head must be spinning!
Are you still due to move premises?
Looking at the log style inlet manifold with the old Zenith carb, would a set of Strombergs yield a decent bit more power without sacrificing drivability?
What about a pair of stock Solex carb on a modified manifold? 🤔 Mini cooper style
A Danish guy did that on his nimbus bike.
I always wondered if this trick also works on Ford Kent's, twin stock twin-shokes webers
You still managed a mega waffle!😂😂
🏁🏁🏁🏁🏁
I initially thought you were playing with a datsun L series as from underneath the Datsun and Imp could be cousins when looking at the head from underneath so similar it isn't funny