yep thats per piston Eric i told Guy the price as thats what VW told me lol F that ennit and the link Guy has given you is worth it as blown rings is no fun at all

^^ The cam in that picture is gonna come loose and fall out the head if it isn't welded. The dark bit in the middle is the cam, the lighter bit is the float ring which is only wedged on, the hole drilled has released it's grip and the cam will float and crash the sprockets.

Why do you think that?

The engine driving fine with 172bhp and 230nm{more than a year} without the cam comming loose (or did you not mean my picture?)

Wow! What mods have you done to make 172bhp?!

Wow! What mods have you done to make 172bhp?!

boost

^^ The cam in that picture is gonna come loose and fall out the head if it isn't welded. The dark bit in the middle is the cam, the lighter bit is the float ring which is only wedged on, the hole drilled has released it's grip and the cam will float and crash the sprockets.

Why do you think that?

The engine driving fine with 172bhp and 230nm{more than a year} without the cam comming loose (or did you not mean my picture?)

It's holding up, but you should know the same applies, it's holding with very little grip. I'm not saying the heat and oil make it inevitable, but if you notice a rough metallic noise like a grinding coming from the engine then turn off immediately and check the cam sprocket teeth aren't clashing. Happened to mine, which is why i had to pin it back into place with a couple of plug welds.

Eric - I've given full instructions in another topic on how to build two 1.6 AFH engines depending on whether you're doing a chain drive version or direct drive version.. use the search!

he's already asked questions in it mikey

You know what I'm like

So let me get this straight. I've gotta use the FAQ to answer someone else's questions..?

So let me get this straight. I've gotta use the FAQ to answer someone else's questions..?

Nope, I was pointing out that he's already found the faq because he's already asked questions in it

Wow! What mods have you done to make 172bhp?!

actually not much :-D a good G40 charger and i had the beckler and bentler ecu from a genesis model{140 bhp} and a good ajv engine..

the boost on the dyno was 0,5 bar! because i had made it with decompression plates.

Gr

What size decomp plate did you use? Is it your engine that has the modified G60 conrods fitted?

So an AFH with the AVY crank/rods/pistons is still 11.5:1 comp ratio? Winning? Haha.

Eric, it basically means that the air when the pistons at BDC gets compressed so much it ends up in an area 11.5 times smaller than it. I think, someone will correct me here haha.

What size decomp plate did you use? Is it your engine that has the modified G60 conrods fitted?

It was a 0,8mm with 2 original 16v head gasket.

No this was my first engine with all original stocks/internals.. wen it was on the dyno we saw that it was running low. (not enough fuel-pressure)

the other engine must need some KMS to run properly :-) and that runs on a G60 charger.

Edited 5 October, 201213 yr by richard16vg40

So with that plate and the extra HG it was the equivalent to about a 1.2mm decomp plate? (i measured a used afh HG to 0.5mm). Do you know what the standard cr of the AJV engine is?

Is it your current engine thats running the G60 rods?

Edited 5 October, 201213 yr by Mclovin

Eric,

Compression ratio is the ratio between the maximum volume of the engines cylinder (you use just one cylinder for the figure, not all 4) and the minimum volume,

So when the piston is at the lowest point (BDC, bottom dead centre) the cylinder volume above it is at the maximum,

then when the piston is all the way up at TDC (top dead centre) the cylinder volume is at its minimum.

As an example, when i increased my ABD engines CR, i calculated its maximum volume was 384.68636mm² and its smallest was 35.6750mm^2.

384.68636/32.6750 = 10.8

So the ratio betweent the numbers (and thus compression ratio) is 10.8:1, which matches up with VW's quotes i beleive.

To work out the maximum cylinder volume, you can multiply the bore in mm² with the stroke of the engine, and then add on the volume of the combustion space that the piston doesnt fill...

So maximum volume equals volume swept by piston (bore x stroke) + combustion space.

Minimum volume just equals combustion space, so CR = ((Bore x stroke) + combustion space) / combust space

Hope that hasn't made it more confusing

And just to add, a higher CR is usually desireable (for NA engines) because the fuel/air mixture is being compressed/squeezed at a greater level, so you extract more heat out of the mixture, thus receiving more power at the crank from the greater heat/pressure pushing downt the piston.

Edited 5 October, 201213 yr by MaxGT

cheers maximus, you just fried my brain

So with that plate and the extra HG it was the equivalent to about a 1.2mm decomp plate? (i measured a used afh HG to 0.5mm). Do you know what the standard cr of the AJV engine is?

Is it your current engine thats running the G60 rods?

I think it was 1mm i dont know exactly anymore

standard cr of the ajv engine is 10,5. {current engine will running with 8,3:1 CR}

it is not my current engine with the G60 rods.. that engine is on a low pit.. i have my own company and that takes allot of time

Only thing i need to do is fitting the kms {Kronenburg management system} and adjust everything on the dyno!

Edited 5 October, 201213 yr by richard16vg40

What he's saying is that if a piston squashes the air in the cylinder to just one tenth of it's capacity when going from one end to the other, then the compression ratio is 10:1

If it leaves just a twelth of it's original size then the compression ratio is 12:1

oooh i see!

Good explanation max but probably far too detailled for what it needed to be haha

Good explanation max but probably far too detailled for what it needed to be haha

No point in skimping on detail my furry friend

Mine was fun haha, I had to measure the head volumes with valves shut, then I measured the bore at 5 points to get the average size x stroke, factor in the compressed HG thickness and volume of the dishes in pistons, was about 10.8 IIRC

how would someone go about doing they AVY with the ecu and fusebox? could you just keep the mk3 fuse to run the basic things rather than having to swap them all over? if this makes sense