Found a 3.8l 6G75 Block (4.0l + potential) specifically to fit the 3000GT / Stealth chassis
Found in these.. V77W Pajero
and you'll need one these.. JDM 6G74 DOHC (use everything off this but the block)
P.S- For the ppl who dont know the 6g74/75 block have the same deck height so you'll need most of the gear of this engine to make up added deck height, the 72 dohc gear doesn't fit - check Wrench Monkeys page to get a better understanding of what i mean --- http://wrenchmonkey.com/Webpages/6G74swap.html
damn well thanks for the 74 sizes. i guess i have too look around and see who has 72 bearings handy . i believe Ray said 72 bearings are wider but i always wonder by how much.
I recon 99% of people are better off just boring out the 74 block though...looks like the 75 will be only an extra mm in there(while it looks good, it has a backwards step in the water channel side of the bore) and going to all the hassle of getting extra Bosses put on the block won't be worth it for that extra .05L of capacity
I put 3K into buying this block so it's going to work one way or another
haha, yep i havnt checked this thread for months, good to see your block pics, fast nelson reckons dohc heads fit the 75 block's sweetas "just a little bit more porting" his words.
This block...have trouble believing the block itself really is a 75 block...but if it IS and we can workout what it shipped in, then it would be the holy grail block (ignoring any other oddities)
yea dunno either, the block you've got will still work, only needs two custom side brackets - all you need now is a jdm 6g74 dohc and swap all the dohc stuff onto your 75 block!
actually got a guy converting some 6g75 MIVEC heads to go on it I've decided I'd rather get stock brackets to fit the block hense getting the Bosses welded onto the block and going to tackle it that way
Don't try welding anything to the block, you could wind up with a boat anchor. Wait for me to take apart the '75 eclipse engine to verify what mount holes to use.
From my understanding as a learning welder by trade welding cast anything especially iron requires special equipment to do it right and usually doesnt do too well im the durability area.
"well, I measured the bores and wall thicknesses and all that rubbish
here we go
6g75
water passages (widest part) 10mm
edge of bore to inside of block 21mm
edge of block to inside edge of block (thinnest)138mm
water passage to bore ~8mm
water passage to edge of inside of block ~8mm
6g74
water passages (widest part) 12mm
edge of bore to inside of block 23mm
edge of block to inside edge of block (thinnest) 138mm
water passage to bore ~8mm
water passage to edge of inside of block ~8mm
keep in mind none of this is sonic...that will have to be in a few weeks or something (probably a month) pics showing my measurements are in the usual spot "
being lighter, does this mean that it's basically a bored 74 with different bosses? what i'm really hanging on is the cylinder wall thickness, and the water jacket "step" in the 75 is'nt going to help in this department.
stroked and bored to the max, would it be possible that both blocks would end up the same displacement, due to the 75 having thinner cylinder walls already? or would the 75 still end up with slightly more displacement?
lol i hear ya, i just had to finish reading everyone elses posts on the matter, and did'nt want to loose where yours was, so i just copied and pasted instead of quoting. i did add quotation marks, they're just small. lol
anyway, mad props to you for all this research for us. i'm very exited to see your final outcome with this beast.
also excited to see if anyone ever does find a 6g75 with the same bosses as a 74 "possibly the endevor?", but with the external dimentions of both blocks being the same, i'd still see it as little more than a pre-bored 6g74 untill some evidence shows otherwise.
and lastly, i'm exited to see how much better the 3 hole main bearing design of the 75 is compared to normal 72 & 74 bearings, and if it is alot more reliable, could 72-74 style blocks be modified to use this new bearing design?
not sure that the bearings are that different, anyone got pics of the 72 bearings (up close/highrez)
I'm taking my blocks into to get checked on FRIDAY...this shall be interesting, I really don't want to stuff around with the 72 block but then gain I don't want to throw away 3k
I've taken Friday off so I'll be spending a few hours talking to the block guys about what can and cannot be done, and most importantly if they can do it!
called up the block guy, he's just finished checking both the 74 and 75 over.
he said that assuming it's going to take high boost (30+psi) his recommendation is to keep the bore wall over 5.1mm so based on his results:
the 74 block is fine up to 95mm
the 75 block is fine up to 97mm
so the 75 fookaround might actually be worth all this trouble (it has a 1mm larger bore radius).
the bore testing guy is now going to take both blocks to his welding guy (regularly welds stuff on blocks) to have a look and get a quote.. he says it's usually $100 per Boss.
Annnd bad news, I cannot weld boss's onto the block, they are saying that most of what I want to weld on are in spots that are too thin...
so I'm going to get all the metal work I'll need, take it down there and see what ones he can weld on, from there it will be a case of seeing what of bdrank's braces will fit (and if so paying him to make me some :|)
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