Mi16 Pistons

[RP1983 4]

Hi,

 

Can somone please answer me a few questions on these pistons, I have had a search but cant find exactly what I need to know.

 

What Gudgeon pin size do they use and are they floating or interference fit.

 

Also does anyone know the pin to crown height on these pistons please.

 

Any info appreciated

[welshpug 1,661]

1.9 or 2.0?

[RP1983 4]

1.9 or 2.0?

 

Forgot that minor detail

 

1.9 83mm please

[welshpug 1,661]

22mm Circlipped fully floating,

 

IIRC D6C pistons are 37.12mm compression height and DFW are 36.28mm.

[RP1983 4]

Exactly what I needed.

 

Cheers

[matyasg 0]

Sorry to chip in, I have similar questions.

I have a DFW engine with 2xDCOE45 (38mm venturis) and PeterT Stage I intake cam.

DFW compression is not too high, so I'm going to change my pistons to aftermarket parts.

I have access pistons with 37,68 compression height but they can produce the pistons in any size I want.

 

What compression height would you recommend to my setup? (I'm not going to use bigger inlet cam)

[B1ack_Mi16 67]

Sorry to chip in, I have similar questions.

I have a DFW engine with 2xDCOE45 (38mm venturis) and PeterT Stage I intake cam.

DFW compression is not too high, so I'm going to change my pistons to aftermarket parts.

I have access pistons with 37,68 compression height but they can produce the pistons in any size I want.

 

What compression height would you recommend to my setup? (I'm not going to use bigger inlet cam)

 

Comp height shouldn't be much more than the D6C ones really, pistons will hit the head if they are much taller!

Maybe they can be 0.3mm taller or something to optimize squish a little bit but this you need to investigate.

 

If you wanna raise the compression you're better of getting pistons with a small intruder dome into the head chambers.

[matyasg 0]

Comp height shouldn't be much more than the D6C ones really, pistons will hit the head if they are much taller!

Maybe they can be 0.3mm taller or something to optimize squish a little bit but this you need to investigate.

 

If you wanna raise the compression you're better of getting pistons with a small intruder dome into the head chambers.

Thanks for that.

If I calculate well, 37.42 comp. height is the maximum, the piston will flush with the top of the liner.

[petert 588]

Very close, it's actually 37.50mm.

[B1ack_Mi16 67]

So 38mm comp height might just about work with a 1.3mm thick headgasket, squish distance of 0.8mm.. maybe on the tight but guess it would work.