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Ok guys I have the Engine apart on the Gasser and I need to do some work on the head. I have been running a .3mm base gasket with good results (standard is a .3+.5+.15 = .95mm total),this has the effect of raising compression and giving a lot better low to mid response,but this is means the piston is about 1mm above the exhaust port at BDC. I need to raise the barrel so the exhaust port is level for optimum efficiency and then do a lead solder squish test. This info would then be passed onto an engineering firm machine and CC the head head I reckon the squish ATM would be close to 2.5mm (at a guess) and need to get this down to about 1mm.My question is who in the Sydney area preferably comes highly recommended to do this type of work and any idea on how much it would cost.
cheers
yep thanks Bruce,head needs to be shaved and reshaped. I could do the shaving at work,but would be a lot more comfortable if the pro’s did it. I will look up NP on the other forum
cheers Ollie
Ollie wrote:
Quote:Ok guys I have the Engine apart on the Gasser and I need to do some work on the head. I have been running a .3mm base gasket with good results (standard is a .3+.5+.15 = .95mm total),this has the effect of raising compression and giving a lot better low to mid response,but this is means the piston is about 1mm above the exhaust port at BDC. I need to raise the barrel so the exhaust port is level for optimum efficiency and then do a lead solder squish test. This info would then be passed onto an engineering firm machine and CC the head head I reckon the squish ATM would be close to 2.5mm (at a guess) and need to get this down to about 1mm.My question is who in the Sydney area preferably comes highly recommended to do this type of work and any idea on how much it would cost.cheers
I read this thread and had no idea what your talking about so i called me three year old son in to sit on my lap and try and shed some light on it but we both ended up just sitting there with dumb looks on our faces (our/my normal look). Could ya help out this pleb Ollie and put it in lay mans talk. I understand the first bit its just the squish test.
Cheers.Ollie wrote:
Quote:JAK wrote:Quote:Ollie wrote:Quote:Ok guys I have the Engine apart on the Gasser and I need to do some work on the head. I have been running a .3mm base gasket with good results (standard is a .3+.5+.15 = .95mm total),this has the effect of raising compression and giving a lot better low to mid response,but this is means the piston is about 1mm above the exhaust port at BDC. I need to raise the barrel so the exhaust port is level for optimum efficiency and then do a lead solder squish test. This info would then be passed onto an engineering firm machine and CC the head head I reckon the squish ATM would be close to 2.5mm (at a guess) and need to get this down to about 1mm.My question is who in the Sydney area preferably comes highly recommended to do this type of work and any idea on how much it would cost.cheers
I read this thread and had no idea what your talking about so i called me three year old son in to sit on my lap and try and shed some light on it but we both ended up just sitting there with dumb looks on our faces (our/my normal look). Could ya help out this pleb Ollie and put it in lay mans talk. I understand the first bit its just the squish test.
Cheers.NO! :laugh:
Ah now i understand.
Thanks for clearing that up :SSorry Jak, :laugh:
when the piston comes up to TDC the area between the piston dome and the head is called the Squish band. By reducing the band down to approx 1mm this will have the effect of raising the Compression ratio.
To check this squish band we need to get some lead solder wire and place it on the dome of the piston.The head is replaced and the engine is slowly turned over using the kick starter. The piston will compress the solder and this is then measured using a vernier. The engineering shop can then use this to determine how much material is removed from the head.
Hope this helps :unsure:
Ollie
Ollie wrote:
Quote:Sorry Jak, :laugh:when the piston comes up to TDC the area between the piston dome and the head is called the Squish band. By reducing the band down to approx 1mm this will have the effect of raising the Compression ratio.
To check this squish band we need to get some lead solder wire and place it on the dome of the piston.The head is replaced and the engine is slowly turned over using the kick starter. The piston will compress the solder and this is then measured using a vernier. The engineering shop can then use this to determine how much material is removed from the head.
Hope this helps :unsure:
Ollie
I’m with ya now, thanks
Continue……….
Diddel wrote:
Quote:Ollie wrote:Quote:Thanks Diddel how much coin did it cost for the head work?Ollie
$130.
I noticed a nice difference in power.Happy with that,
I will also give greg ball a call
Ollie
jack maybe photies to follow
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