Spuds Porting and Tuning Thread

[Khriss]

On 03/03/2021 at 18:30, Stubby said:

Cherry ?

Cherry brandy more like. K

 

( which i do indeed like) 

[spudulike]

It is what it is. My customers always seem pretty happy and don't believe I have had any issues with any of them. I try to treat customers how I would like to be treated. It is a simple model but I guess other people in the same industry have some catching up to do!

[bmp01]

4 minutes ago, Khriss said:

Cherry brandy more like. K

 

( which i do indeed like) 

Aw crap did it happen again.....

[sime42]

It is what it is. My customers always seem pretty happy and don't believe I have had any issues with any of them. I try to treat customers how I would like to be treated. It is a simple model but I guess other people in the same industry have some catching up to do!

It's the model I use as well. If you're honest, hardworking and pleasant you'll always have a repeat customer base.

[petercb]

Here is my more commercial view on what I call porting: -
Most of the saws I get in for porting are anything from knackered to new....mostly "Well Used". Most need a good 45 min clean and an hour service. Things like the fuel system and pressure and vacuum testing of the saw are important if you are going to get more out of it and failure to do this will result in the saw not lasting.
In my world, I look at £200-250 as being what the general fella with a saw for porting will spend, most will accept this as being acceptable on a MS200T up to a MS880, small MS150s and MS201s are different in so much as a muffler mod and ignition advance make such a big difference, I don't do a full port but do a muffler mod and ignition advance/service for around £100.
So, what I do is clean the crap of the saw and get it as clean as I can. I strip it down, inspect its bits:blushing: replace what is needed, make sure the fuel system can provide what is necessary and then do a muffler mod. This can be a simple increasing of the outlet hole area or letting in a secondary outlet port but always look for a "Rorty" sound and increasing flow rather than an ear splitting row likely to piss the owners customers off.
I then try to increase compression and widen/reshape ports and do piston work to improve flow in the engine then finally tune the carb to keep the saw close to manufacturers limits but not to exceed them. This won't give max power but will ensure safety of the owner and the saw. The chain brake and chain catcher are cleaned and inspected and on all top handle saws, the cover is stripped, cleaned and all components inspected to make sure it works as the manufacturer designed it to do - those that have had me do your MS200T/MS201s will have seen this!!!
My modifications give at least 25-35% increase in performance and I avoid changing port timings as it is time consuming for the reasons in my previous post and I tend to aim for getting the 80% of relatively easily achieved gains rather than spending hours achieving timings that will give a relatively smaller increase in performance compared to the simple modifications (simple in my world) that I do that make a real difference.
I don't tend to measure the performance from what I do but I did have a customer who was competing in timber-sports with a 372XP. He was all over his saw and sport and already had a jungle muffler on the saw. My mods to ignition advance and ports (without taking the jungle muffler increases) gave him another 30-35% increase in performance.......his figures not mine.
In short, when I mod a saw,  I aim to get the easier 80% and avoid the difficult 20% gains so my customers get a good working saw with enhanced performance, that is safe and will last.
Call it what you like, that is what you get!
 

Thanks for sharing that, fascinating stuff always wondered what was involved.

[topchippyles]

Really good read spud and very interesting. Might be asking a daft question but your saying that you get 30-35% more performance out of the saw so does this mean the manufacturers are producing under powered saw units or is it a case of enhancing and modifying a standard engine like you would a racing car so to speak.

[HuntingHicap]

9 hours ago, spudulike said:

It is what it is. My customers always seem pretty happy and don't believe I have had any issues with any of them. I try to treat customers how I would like to be treated. It is a simple model but I guess other people in the same industry have some catching up to do!

I have had a couple of saws ported by Spud, as have many others on here, and can vouch for the quality of his work and his excellent communication and customer service. 

[JaySmith]

Same here, I sent Spud a 550xp Mark one that didn’t run well at all and had it sorted and ported while it was there. It’s like a completely different saw now and runs better than it ever has done. Only issue now is people queue up to use it onsite as it’s a little ripper!

[Retired Climber]

Is there an issue letting employees use modified saws? If there was a kickback or trousers not stopping the chain quick enough related injury, I'm thinking the HSE would be all over the fact that the saw had been modified to make it more powerful than the manufacturer intended. 

 

 

[gary112]

1 minute ago, Retired Climber said:

Is there an issue letting employees use modified saws? If there was a kickback or trousers not stopping the chain quick enough related injury, I'm thinking the HSE would be all over the fact that the saw had been modified to make it more powerful than the manufacturer intended. 

 

 

Good point,also if you had a new saw done i guess your warranty would be out the window