red gear into blue motor

[The Darkness]

would these work in a blue motor? not the block but the pistons. thx
holden red 202 motor parts - eBay HQ, HJ, HX, HZ, WB, Holden, Car Parts, Cars, Bikes Boats. (end time 24-Oct-07 17:59:12 AEST)

[DANNY8]

Yeah the pistons are the same, aslong as both motors are 202's or 173's etc etc.

I was watching a set of NOS GM pistons on there and 2night they finished....the whole set sold for about $21!

I got a set of new 186 flat tops (being 186 they were for a red motor) for my blue 173, just got it bored out 130thou to fit them in. The bore size is now the same as a virgin 202. So now it isn't a 2.85L 173, but a 3.0L 186.

[The Darkness]

lol. im also watching some crow cams heavy duty valve sprinsgs. planning on puttin a small turbo setup. just a little bit of extra power so im modding my 202 now

[DANNY8]

How much are the valve springs goin for? Can't seem to find any for a holden 6 listed on ebay. Don't worry I don't wanna buy them from under u or anything lol, just curious. I bought new ones (Crow heavy duty) which cost me $75.

[AirStrike]

Yeah the pistons are the same, aslong as both motors are 202's or 173's etc etc.

I was watching a set of NOS GM pistons on there and 2night they finished....the whole set sold for about $21!

I got a set of new 186 flat tops (being 186 they were for a red motor) for my blue 173, just got it bored out 130thou to fit them in. The bore size is now the same as a virgin 202. So now it isn't a 2.85L 173, but a 3.0L 186.

BORED 130 THOU" !!!!!!!!

[The Darkness]

How much are the valve springs goin for? Can't seem to find any for a holden 6 listed on ebay. Don't worry I don't wanna buy them from under u or anything lol, just curious. I bought new ones (Crow heavy duty) which cost me $75.

these are $60 new.

[V85000i]

BORED 130 THOU" !!!!!!!!

i thought the same thing.

[DANNY8]

haha its sounds a lot, but it was a 173 to start with. How it is now is the same as a virgin 202 block. A 186 has the same bore size as a 202, only it has smaller stroke.

A mate at work thought I was dribbling sh*t coz he said ya can't get pistons bigger then 60thou over. But I bored it out to the standard bore size of the 186, so std 186 pistons would fit. 202 pistons won't tho coz the pistons will hit the head. I can put 202 pistons in if I put a 202 crank in as well, which will then take it up to 202 cubes (of course), but that will just be like a standard 202.

The 173 and 202 blocks are identical, except the bore size is smaller in the 173, therefor if someone is after a virgin 202 block, they can just get a 173 block (even if it's bored out 60 thou, coz it's still under 202 spec) and still bore it out to the std 202 bore size.

173 + 130thou = 186 (or 202 if I use 202 pistons and crank). You can also chuck a 202 crank and pistons into a 186 red motor to bring it up to a 202.

Put simply, I can still go another 60 thou like the normal 202's.

Sry for being so repititive, I'm just crap at explaining technical stuff haha.

[Dose Pipe]

what vhpirie has done is quite safe (id hope so as i sold him the pistons :P) he still has another 80thou to go before it starts getting sketchy

[V85000i]

it amazes me that the 173's have adequate cooling around the bores if the walls are that thick.

[DANNY8]

I think 130thou is about 3.2mm (thx to Google )....so it isn't really heaps....but I guess in a motor where everything is exact and important, something small is actually big.

I haven't started the motor yet so dunno wat she's gonna do...hopefully within a fortnight if I get off me bum.

[Clutchy]

what vhpirie has done is quite safe (id hope so as i sold him the pistons :P) he still has another 80thou to go before it starts getting sketchy

Id be having the block x-rayed befor i was boring a block any more than this even now it would be at its limit.

[DANNY8]

Id be having the block x-rayed befor i was boring a block any more than this even now it would be at its limit.

technically it aint at its limit coz after boring the 173 block out 130 thou it is now the same as a std 202 block.

[Dose Pipe]

I love how all the experts who dont even own an old holden 6 are comenting....

[quick308]

it sounds right to me. same go with tha v8s i think. 253, 308 and 350's are the same block size

[V85000i]

yeah i'm not arguing it, i just thought that because the walls between the bores and water jackets would be so thick on a 173, how do they not overheat.

[Tree cutter]

The red 202 pistons will fit a blue block but the red motor conrods are weaker.Blue and black motors have stronger conrods with thicker bolts so they can handle more revs.

[DANNY8]

yeah i'm not arguing it, i just thought that because the walls between the bores and water jackets would be so thick on a 173, how do they not overheat.

I would of thought having thicker walls would be better. More thickness which means more metal to take more heat. I guess that would work hey?

The red 202 pistons will fit a blue block but the red motor conrods are weaker.Blue and black motors have stronger conrods with thicker bolts so they can handle more revs.

Blue/black rods are starfire rods hey? Which seem to sell pretty good. It seems on eBay if u have 2 auctions, one for a set of rods out of a blue 202, and a set of starfire rods, the starfire ones get a lot more attention coz of the name.

In my 173, I used the standard 173 crank and rods (got it all balanced up as well), then the red 186 flat tops. So I'm still using the blue bottom end except the pistons. Hope it goes ok.

[V85000i]

yeah that makes sense, i suppose it doesn't matter either way, if the walls were thinner the heat would be dissapating into the water and being taken away by the water flow to the radiator.

[quick308]

The red 202 pistons will fit a blue block but the red motor conrods are weaker.Blue and black motors have stronger conrods with thicker bolts so they can handle more revs.

is there any difference at all between tha black motor and tha blue motor. i know tha black motor is a later model motor. in tha vk's i think

[DANNY8]

yeah the VK had the black motors. I don't think there's much difference at all between the blue and black motors. The black had a slightly better flowing head (apparently), and of course the EST or EFI system. But other then that I don't think there's anything different except the colour.

[AirStrike]

I love how all the experts who dont even own an old holden 6 are comenting....

I may not own one now, doesn't mean I didn't in the past. Had a worked 202 in a LJ. I just feel that 130 thou" is a lot of meat to take out.

[AirStrike]

it sounds right to me. same go with tha v8s i think. 253, 308 and 350's are the same block size

350 is a totally different engine.

[quick308]

350 is a totally different engine.

is it oh well there ya go. i was not totaly sure thats jus what iv been told. so tha 350 has a larger block then

[V85000i]

the 350 is a chev motor, 253 308 are holden motors