Wow. Thes a bit of a fizz bang engine there
No.....I attempted to upload from phone, it kept asking to select a file, when I selected the desired picture guess what it did.......asked me to select a file.
Given the cost involved to do it, I think I'd be better off going bigger valves eh?
If you look in the upper right you'll see the 'loading' icon flashing as the picture uploads. If you wait a few seconds while it does so the 'Choose file' box vanishes and then you'll see the image as-per desktop when you choose to insert as full or thumbnail.No.....I attempted to upload from phone, it kept asking to select a file, when I selected the desired picture guess what it did.......asked me to select a file.
I disagree with that...i'd only put the onus on exhaust valves if I were running a large hit of Nitrous Oxide as well. If we took a round straight tube with matching diameter to the valve head as 100% flow efficiency then the normal inlet port flows at about 50%. The exhaust port doesnt have this issue, as the air already uses the full circumference of the valve seat due to the fact it's going into the seat from all around the chamber. As long as the port is big enough then it should hit >65% efficiency or more because the valve seat is being used more effectively. Even the shape of the short side bend is not that critical because it's not having to guide the air into a seat like the inlet, where the inlet charge can skip across the short side of the valve for example.If I were doing a T/C engine from scratch I would make the exhaust valves bigger than the intake - you have the turbo to help overcome any small loss in efficiency from having smaller intake valves which is more than made up for by the better exhaust breathing.
You still having the manifold? Still at Lee's I think.Dave,
Not going for massive power. Been there/done that.
Going to run 17-18psi, with head work,matching the manifolds, t34 with .48 cossie housing, front mount, got the nice downpipe and side exit exhaust already as you know, cossie fuel reg, would love another Nick Hill chip and a front mount.
Ideal would be 235-240 bhp and get a standing quarter of low 13s,
You still having the manifold? Still at Lee's I think.
Yeah no probs buddy, i was just making sure...I dont mind holding it for you but if you didnt want it i'd stick it up for grabs.Yea mate.
Trying to sort some funds out shortly.
Whoa were you visited by the 3 ghosts last night?Yeah no probs buddy, i was just making sure...I dont mind holding it for you but if you didnt want it i'd stick it up for grabs.
I disagree with that...i'd only put the onus on exhaust valves if I were running a large hit of Nitrous Oxide as well. If we took a round straight tube with matching diameter to the valve head as 100% flow efficiency then the normal inlet port flows at about 50%. The exhaust port doesnt have this issue, as the air already uses the full circumference of the valve seat due to the fact it's going into the seat from all around the chamber. As long as the port is big enough then it should hit >65% efficiency or more because the valve seat is being used more effectively. Even the shape of the short side bend is not that critical because it's not having to guide the air into a seat like the inlet, where the inlet charge can skip across the short side of the valve for example.
Edit to add: OE 21 Turbo Inlet valve diameter 43.9mm, Exhaust valves 37mm