Appreciate it. Still trying to settle into a groove, but it is coming along.

372xp wit +2more HP count me in!!!!

@@justinweaver8787 exactly😀

Thank you

.018 isn't that tight, many dolmar 7900'scame that tight or even tighter. .020 is just a good safe number many use.

I only consider 18 thou tight as below that on builds I’ve had issues with pre-detonation and had to mess about a bit (with higher octane fuels, etc). I haven’t come across a 7900 with tighter squish that 22 thou yet but I can absolutely believe it as the Dolmars I’ve ported have been all over the place, even on exactly the same model of saw from the same production year when I’ve ported a batch. I’ve not gone down the race saw rabbit hole yet but I wouldn’t be surprised to see much tighter squish’s in that area. For work saws here I tend to stay up around 24-26 thou as folk here tend to use fairly cheap and dirty oils and often don’t bother warming their saws up, leading to some almost comical amounts of carbon build up in the cylinder and piston crown. I worked on a two year old saw a while back (can’t remember if it was a 372xp or an MS261) and there was so much carbon build up in the exhaust you couldn’t fit a pencil through it into the cylinder from the muffler side - crazy! 🤯 Suffice to say it ran a heap better once I’d removed it all 😂

I’m not sure if that was addressed to me, Brett or Joe, but I just run 98 octane ethanol free pump petrol and it runs fine for feisty work saws (being able to use pump fuel is in part a governing factor on how I choose to port/modify a saw).

@@latinodeathjazz just use a 268 piston in a 372 with everything else stock in the cylinder, just a muffler mod and let me know how you like that. You will need to use a base gasket and cut a .040 pop-up that will fit into the chamber, leave the squish band stock also. I think you'll like how simple it is and how much extra power it gives you. It's also nice because you can replace the 268 piston with a stock 372 piston anytime you'd like as you did no custom machining on the cylinder. Have a great week.

@@williamwallace9620 I run 90 octane ethanol free mixed 40-45:1 using Maxima K2 in all my saws, including ported and higher compression.

Thanks. Most of the time they don't go too far before I can get them into a cup.

Thank you

That would be a fun build, I only have a m tronic 462...Maybe someday I'll get a carb one.

@@dynojoemods2764 I like the improvements Stihl made to the ms462. The ported 372xp with a 28" light bar has been a nice daily felling saw.

Right, for sure a saw that can start the ported saw addiction...

@@dynojoemods2764 very forgiving to port also. Easy for a beginner.

Appreciate it. I don't really mess with the carbs on the worksaw builds. Unless they are really struggling to fuel. 97% of the carbs are adequate for "worksaw" type mods.

​@@dynojoemods2764 when you increase air flow don't you also have to adjust the carb to increase fuel flow? Or does the carb do it automatically?

@@Mark_Tschetter As more air is pulled through the carb more fuel is also pulled to a certain point.

@@dynojoemods2764 Thanks! that's what I needed to know. Which filter setup would give more airflow on a performance build like this, the low top or high top?

@@Mark_Tschetter Both factory filters seem adequate for a worksaw type build. Not noticed a large gain from one over the other.

Indeed he is. Great guy for sure.

If it was 100% mill saw it would be a little bit different. Bit not drastically

Those type of numbers will work well. Even without the extra compression. Depending on the port time you stsrt with a gasket delete alone may not get thr exhaust low enough.

@@dynojoemods2764 Thanks for your reply. Will give it a go in the near future.

It may make a slight difference, but nothing you will be able to feel.

Awesome! Sounds like a plan. I do have some porting spots on the calender if you want to Check them out. Www.worksaws.com

@@dynojoemods2764 On the calendar for the 24th!!!!

Around 875 +/- shipping

@@dynojoemods2764 is that from Paveen?

@@robertclifford1099 Yes

I will try to remember to throw the gauge on the next saw that gets a healthy band cut. I would guess this around 185 psi

You need a good Michigan ported saw man. Looks great Joe.

nop, no difference in gains from low top or high top

Hard one to decide. Can't go wrong with whichever one feels best in the hand.

I'm not a fan of knife edging ports. I feel they flow a bit better over a raidus/bull nose. A knife edge dosent create a boundary layer the same as the rounded, can actually make the mix stick to the walls vs flowing. Depending on the goal for the saw and type of porting they may need all the lowers opened way to the max and bulk flow as much as possible. For a standard worksaw type build I don't think it is needed on every saw.

Most of the older generation/carb saws gain better %. Most of the newer auto tune/m tronic don't gain a high % but they start out stronger too.

Stock you are probably limited elsewhere

Stock bore. Did machine work to raise compression and move the ports to the correct duration.

I agree! Take the same saw and dyno with the high top bigger filter to see if its worth it!

What are you hoping to gain by switching, which filter do you have now.

Yes 371 gains very well

@@dynojoemods2764 do you offer this service?

@@VE9ASN Yes, check out the website Www.worksaws.com to schedule a porting service appointment.

To lower the cylinder, increase compression and get port time closer to where I want it. And I cut the chamber first that way no clamp marks are left over after cutting the base.

EBay

I don't remember, sorry.

Yes it is. There is also cylinders made by Italian company Gilardoni. I have one on my early (1999) 362XPG with single large transfers.

Malaysia

350$ + return shipping for the port work. Check out the website under porting service appointment Www.worksaws.com

Yes

Just the way I learned to read the wheel and talk numbers. I have started to use total durations a bit more recently.

@@dynojoemods2764 I see. Thank you. I would like to give compliments to the electronic degree wheel tool. Really clever idea.

The older 365 wake up really well