Project Shit Box (2021)
- Thread starter fubar andy
- Start date
It’s not about running mad power , but it’s not that much more effort to do a few improvements and put the head back to better than new .
Some things have to be done anyway , like crack checking and measuring any warp in the head ,cleaning .
So if the head is off anyway and valve seat are to be lapped , why not reangle seats , cc the chambers , check cams are parallel , new valves and guides and port .
Yes it’s more cash , but the head is the heart of the engine where all the action happens ,the heat and pressure are all created here .
This effects the whole engine in some way or another ,not just power but longevity.
The extra power is a side effect of that extra longevity, due to better heat paths and flow .
Aluminium melts around 650 C ,the combustion temp is way above this (but only intermittent ) hence the need for cooling paths - the better they are the lower the head temp peak - things like valve seat width form the heat path along with guides ,valves , plug threads and so on - the better the heat path more heat is transferred to the water /oil - less stress all around on gaskets ,pistons ,rings -and the head - a longer lasting engine .
Some things have to be done anyway , like crack checking and measuring any warp in the head ,cleaning .
So if the head is off anyway and valve seat are to be lapped , why not reangle seats , cc the chambers , check cams are parallel , new valves and guides and port .
Yes it’s more cash , but the head is the heart of the engine where all the action happens ,the heat and pressure are all created here .
This effects the whole engine in some way or another ,not just power but longevity.
The extra power is a side effect of that extra longevity, due to better heat paths and flow .
Aluminium melts around 650 C ,the combustion temp is way above this (but only intermittent ) hence the need for cooling paths - the better they are the lower the head temp peak - things like valve seat width form the heat path along with guides ,valves , plug threads and so on - the better the heat path more heat is transferred to the water /oil - less stress all around on gaskets ,pistons ,rings -and the head - a longer lasting engine .
Was a good day that, 16 secs
Keep meaning to send Kieron a message and see what he's upto these days!
Progress is getting underway.
However I'm needing a new crank as mine looks like its seen better days and after a polish it seems like there a little too much damage to the journals after it wasn't cleaned from its previous rebuild.
If anyone has a standard crank, in good nick or maybe needing a little polish, I'm all ears!
However I'm needing a new crank as mine looks like its seen better days and after a polish it seems like there a little too much damage to the journals after it wasn't cleaned from its previous rebuild.
If anyone has a standard crank, in good nick or maybe needing a little polish, I'm all ears!
Nothing major has really happended over Xmas and Jan.
Sourcing parts in advance along with a new crank has been the top issues.
However that crank has been found and finally I took delivery today (still needs to be checked on Monday)
Also my new paddle clutch rocked up this afternoon.
DHL very kindly left it on my driveway for someone to steal and never followed the delivery instructions I requested!!!!
Now the clutch and crank are here, work can start to take place to get things put back together.
Hopefully it'll be ready around March/April for installation not longer after then (fingers crossed)
Sourcing parts in advance along with a new crank has been the top issues.
However that crank has been found and finally I took delivery today (still needs to be checked on Monday)
Also my new paddle clutch rocked up this afternoon.
DHL very kindly left it on my driveway for someone to steal and never followed the delivery instructions I requested!!!!
Now the clutch and crank are here, work can start to take place to get things put back together.
Hopefully it'll be ready around March/April for installation not longer after then (fingers crossed)
Good to know!
Mostly will be used in track, so hopefully won't be too aggressive on the gearbox!
Do you find it quite grabby or does it engage with reasonable ease?
Mostly will be used in track, so hopefully won't be too aggressive on the gearbox!
Do you find it quite grabby or does it engage with reasonable ease?
Perfect!The AP racing 4 paddle clutch I've currently got fitted isn't grabby or harsh so you'll be fine with a 6 paddle
I can't wait for my initial whiplash!
Well, crank number two has been rejected due to too much wear damage.
I don't know if my engine builders are wanting a perfect crank or they are just super picky!!!!
Back to looking for another crank!
On the upside Turbo as gone into Owen Developments for an inspection, fingers crossed nothing major needs doing!
I don't know if my engine builders are wanting a perfect crank or they are just super picky!!!!
Back to looking for another crank!
On the upside Turbo as gone into Owen Developments for an inspection, fingers crossed nothing major needs doing!
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Very fustrating!
I'm on my 3rd crank now and its been the hardest part to get hold of. They all seem to have too much wear on them so they keep being rejected.
I've got one being sent to my engine builder this week, after that, I've got one more to look at (crank).
However if neither as fit or use, the engine build stops!
On the postititve side, the head is built, bearings are here, I just need a crank to finish the job!
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Crank has been approved!!!!
Both!That's good news
What was the issue with the others? Were they too far gone even to take a grind or was the engine builder just after a perfect standard sized crank?
They were quite scorn and grinding them isn't what they wanted to do as getting Nissan bearings for ground cranks was not available (apparently).
Tell me about it, I understand what they were getting at and you could feel the grooves in some of the cranks with my fingernails.
They are very proud of their work and I guess they wanted to ensure (knowing its going on track too) the car would last as long as possible!