Squish tunner in Europe? (romania)

[adriano.ro]

I'm planning to do this,the benefits are too great to be ignored. So the problem is the machinist,to cut from head is easy step but to calculate the volume of head chamber and angle is tricky part. If I make 1.5mm squish and ignore the volume chamber will do some impruvments?

Anyone know a good runner is Europe ? I am from Romania,if someone from Romania read this and have some solution I'm glad to meet him

 

[Zman]

It depends on which head you have. Both of the 250 heads in these photos were cut for a 1.2mm squish. I kept the heads on the same sides for the photos so you can see the numbers. The one on the left with the lower volume had too high of compression for pump gas with 1mm squish and was very difficult to kick over with the stock kickstart lever.

 

[Zman]

I forgot to say that I cut the one on the right (previous photo) before I installed it and it looked like the head on the lower part of this photo.

 

[adriano.ro]

For 1mm squish is impossible to untouche the combustion chamber. The perfect squish is between 1.1mm-1.4mm ,if I make it on that tolerance ,the compression will be to high so too difficult to start the bike. In conclusion I will try to go down ,until I need to modify the combination chamber.

Tnx for information. I plan to do this next month so any info will be appreciated

 

[(F5)]

Search and read my head thread, well first couple of pages it gets off track later. 1mm but triangle the squish to parallel the piston. If you have a look at the photographs you can almost estimate how much I took out for my 300. And then measure, I give instructions.

 

[Zman]

I ran the 250 head, ME25-30916000 shown on the right with about 1.2mm and it runs great on 93 octane. So it depends on which head you have if your head has the larger volume from the GG factory. If you do not have the ability to open the head dome you can still benefit from decreasing the squish but just be careful that you do not raise the compression too high.

 

[adriano.ro]

So my head has this code:-30916000. BUT before the "-" someone has erased something,some numbers I think,or that modification is made from factory.
@Zman we have the same( almost ) code,in conclusion,can I make the squish around 1.4mm without touching the dome?

 

[Jakobi]

So my head has this code:-30916000. BUT before the "-" someone has erased something,some numbers I think,or that modification is made from factory.
@Zman we have the same( almost ) code,in conclusion,can I make the squish around 1.4mm without touching the dome?

http://homes.ottcommunications.com/~red/uccr.html

Have a read and see if you can get your head around the methods described. I understand it may be hard with English not being your native language, but short of knowing a machinist/engineer who is capable of calculating and correcting the compression ratio is to take some time and measure some volumes yourself. Determine how much you can machine without pushing your compression through the roof.

 

[Elvis74]

Search and read my head thread, well first couple of pages it gets off track later. 1mm but triangle the squish to parallel the piston. If you have a look at the photographs you can almost estimate how much I took out for my 300. And then measure, I give instructions.

Do you have the link for your thread?!
Would
Be very helpful


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[Zman]

The head in the left of my photo has the "30" "erased" at the factory and it has the smaller chamber. That is the one that had the compression that was too high. Your best bet is to try to measure as Jakobi said. Google Translate works great!

 

[adriano.ro]

Tanks guys,I will measure the squish and I will try to do the best,if I damage my head ,S3 high compression head will be the rescue solution.

 

[Capz85]

Tanks guys,I will measure the squish and I will try to do the best,if I damage my head ,S3 high compression head will be the rescue solution.

I'm going through a similar thing, my head has been at a machine shop since November keep being told maybe at the end of the week..... Turns out they lost it and have now found it

I had 2.3mm squish hoping to have it at 1.3mm if it ever returns of not they can send me an S3

 

[savage sausage]

I'm going through a similar thing, my head has been at a machine shop since November keep being told maybe at the end of the week..... Turns out they lost it and have now found it

I had 2.3mm squish hoping to have it at 1.3mm if it ever returns of not they can send me an S3

hmm thats sounds ominous id be going straight over there and getting it back,i mean they lost your head doesnt sound a very professional setup there.
are you sure their not gonna let the apprentice mill it.

If i were you id go elsewhere...sound like a bunch of monkeys, if you are determined for them to do the work I'd be asking for a heavy discount do they have a FB page or something??

 

[Capz85]

Yes I'm giving it one more week and I'll get it back if it's not not done it becoming a joke, the bike shop/ rolling road I use have sent it there ( not sure why they can't do it themselves) and apparently they are usually pretty quick but they were saying something about them being really busy as they are modifying a big batch of Ferrari heads for a race series.

Anyway one more week then I will send it off to Mick abbey racing heard lots of good things about them