Im porting this Daliem 50 cylinder and Im wondering which directions you guys think I should take? I have an extra cylinder to decided to try and port 1 and get my Gfs bike over 35.
This is cast Iron
That exhaust port looks ridiculously small
Don’t just go in there with a dremel if you have to ask what to do. First do a port map, then take measurements, then put it on and check the durations with a degree wheel. After you have done that you can see what can be improved upon without going too far and having a boat anchor. It is easy to go from perfect, to a little over, to unusable.
just follow that burnt carbon line to match the exhaust . pretty safe to go wider by a few mm and up a couple. fun time.
Ended up raising the exhaust about 1.5 mm and opening up the exhaust a bit, glass sanded the head removed the head gasket and replaced it with some copper spray, seemed like it revving a few hundred RPMs higher.
Also I just realized this is in the wrong section, sorry.
Looks like the only mods you could fit in there would be to open up the exhaust port , channel and port match it with you're header , maybe room to get a auxiliary exhaust ports , transfers i would not touch besides mild reshaping with a file for symmetry , but if you were able to dig a couple pockets into the bore between the transfers without breaching into cylinder studs , and add precisely timed charging holes into the piston , youd have some boost ports . Modifying the combustion zone and getting more compression and a squish would help too. I still dont know why people think spray on copper is a suitable head gasket , the reason you have a seal is because youre head is aluminum and the cylinder is iron .
fWFFF (fuckjbg rong forum fuck face)
Have never found the source or patient 0 for spreading the copper spray gasket virus
Not sure where the idea came from, maybe a guy under torqued a cylinder and had to use spray in a pinch, then his buddy saw him do it, and it spread like wildfire
At any rate, where in the service manual does it say ‘Use pt no xxx-xxxx spray gasket’ ?
How in the fart are you able to tell it raised rpm by a couple hundred by feel?
You’ve got lots of splainin’ to do!
> SABAT! andDestroy Wrote:
> I still dont know
> why people think spray on copper is a suitable head gasket , the reason
> you have a seal is because youre head is aluminum and the cylinder is
> iron .
Glad someone else said it. I was once sick too. I was always developing leaks. Turns out gas breaks that spray down easily. Lots of people still use it and say how good it is.....Head gaskets all day everyday.
Does that mean copper blinker fluid is worthless also?
Lol I guess next time Ill just spray the copper spray in a brown bag and wear it like a mask.
I did a pre and post port map and only raised the Exhaust 1.5mm and widened and matched to the pipe.
I could tell it was revving a little higher cause I ride it every day and I know the wall it hits, this time it went past a little but nothing high strung.
your required to a post a post port picture.
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