TO TO TURN MY 1600 to a 2L????

H3PPZ · tinkerer Joined: 17 Oct 2002 Posts: 442

i got a 1600 engine sat on a pallet at work and was wondering if someone who knows what they are talking about could walk me through the steps of how to bore it out????

i got a 2L in my gemini now but that one was supplied and fitted by a mate but i cant get in touch with him any more.

tx1975 · tinkerer Joined: 21 May 2002 Posts: 321

u can bore it out and put 2ltr pistons in it but that will only make it around 1800, the 2ltr crank can be put in but pushed the pistons out the top of the block so u require custom conrods to stroke it out and not hit the pistons onto the head..

TGNVD247 · tinkerer Joined: 04 Nov 2002 Posts: 470

whats wrong wid ya 2L?
u cant bore a 1.6-2.0

GasGem · backyard mechanic Joined: 05 Nov 2001 Posts: 755

PREVIOUS POST BY SOMEONE ELSE THAT SHOULD CLEAR IT UP.

Gemini Engine Spec's
I know this has been said before, but it seems to be said regularly. Half of the time I read posts about gemini engine sizes I have to laugh. Everyone is aware of:

g161z has 82mm bore and 75mm stroke.
g180z has 84mm bore and 82mm stroke.
g200z has 87mm bore and 82mm stroke.
g161z capacity is actually 1548cc
g180z capacity is around 1850cc
g200z capacity is around 1950cc
The maximum overbore ive ever seen in a 2litre is 60thou or 1.5mm. Someone may know of a bigger one but i doubt it cos there is barely enough cylinder wall to seal when its bored 60thou over. Working with the rough size that the difference between a g180 and a g200 bore size is 3mm and that gives 100cc, a 1.5mm overbore should give you and extra 50cc correct? Therefore the largest possible non stroked g200 capacity will be 2000cc exactly. So why do people talk about boring motors to 2.3litres? And if i fit 2litre pistons to a 1600, I barely get 1750cc. And while im sure it is possible, I am yet to see or have proven to me that stroking a gemini motor is possible. People talk about hilux cranks and corona cranks, none of which come close to having the right journal spacing to fit a gemini. So unless you know things I dont, and I know alot of engine reconditioners in queensland, I would pretty much rule out stroking a g180z or g200z.

Be happy with your motor, its not the size that counts, its how good the head is that matters!