350 crank yeah not at the wheels. but why risk it? might as well build it to leave the upgrade options open for the future. ive seen many people with loads of power with stock displacement. the only reasons i bought pistons is because the engine i bought for the build busted exhaust valves and ruined one piston with all others having contact. if they wouldve been good damn right id run stock. but when stock costs just as much as aftermarket i went aftermarket

 

i still stand for the bored 2.0 idea... but ivebeen drinking so ijust skimmed...

 

well...i've been debating, need some advice. i wouldnt bore it to a 2.0 i'd stroke it. i've read a lot about how to do it with the im shaft having to be machined, and the inside of the block having to be shaved a bit so the rods clear...im just worried about the reliability of that with the im gear being like half the size it should be with like double the power. anyone on here have any advice, i can get like most of the parts for like 1500 through 034 which is awesome considering that rods and pistons are like 7 or 8 hundred, it just worries me a bit, but yeah im shooting for high power but i'd really like the internals to be as reliable as possible as i dont really want to have to rip into it again and again...

 

thats why id just leave the stroke alone. when i was thinking about my motor build i didnt even consider the idea mostly because of cost. although it is a little easier for me cause im 06a and dont have an im shaft. if you do really want to stroke it id buy another motor. thats what i did. i bought mine for 250, including the block, head, turbo, manifolds. albeit the head was shot but i still think i got a good deal.

 

If you want to run a turbo that big as a DD, you're going to need more displacement to get it spun up in a livable amount of time. I really don't think you need a valve job for 450hp, but maybe I'm just being conservative. I'd say rods, stroker crank, and all associated stuff like bearings, studs, etc. and you should be good to go. Do you really need to wind it out to 9k on the street?

 

um... yeah!

 

im not planning on driving the car around at 450 all day, i plan on limiting the boost with an ebc, so that way i've got power for just driving but when some kid in an sti pulls up next to me i can flip to my high boost setting and go from there, so 9k all day no, but once in a while i would. also i do plan on using quality parts, ie rods, new pistons, bearings bolts, the whole nice yards and a professional will be doing it. i think im just going to go for it, whats the worst that could happen. haha

 

Don't bore, stoke it if anything. The power gains from stroking will be significantly better.

 

Might want to put the drink down because you cant get 2 liter by going larger bore alone, even the largest 83.5mm bore will only get you 1.9 liter with the stock 1.8 crank.

I dont think that is even possible since I have yet to see anyone offer a 81mm 1.8t piston for a 92.8mm crank, they all seem to be 83mm and 83.5mm. Stroking with a stock bore isn't going to have any advantage over doing a larger bore at the same time. I have been running 2032cc(92.8 crank and 83.5mm bore) for 8 years now, running to 8500 rpm and making up to 650awhp.