Thread: 92mm / 92mm Looking For Opinions

I have been in the turbo sr20 world for a while now and am debating starting fresh in 2011 with a 92mm bore 92mm stroke 12.5:1 VVL build. I have a few questions that I hope someone could help me with before I decide to jump in this thing and make my initial purchases. Does anyone feel that this build it a little too ridiculous for a DD? What kind of engine life on average could someone expect to see on an engine like this daily driven, well taken care of, never sprayed and never reved to hell? I do apologize in advance if this comes off as a dumb or generic question but I didn't find exactly what I was looking for when I searched. Any opinions will be appreciated.

for about the same money you can go with 91/92 mm bore and get a LOT more displacement.. (2.3L instead of 2.1L) and rev faster

then you'd have a 92mm bore x 86mm stroke, which is oversquare and potentially a better revving engine.. to go 7700 rpm in a stroked (91mm or 92mm) motor, the piston speed is a lot faster than 7700 rpm in a stock 86mm stroke motor.

bigger bore also gives greater compression too.. more-so than an equally bigger crank..

really, when you go with 86mm bore and 92mm stroke, it's like you're moving towards making the motor a KA24 or QR25.. both of those are stroker motors.. (in terms of bore/stroke ratio)

maybe you already know this and like low end grunt.. if that's the case, go for it man!

In general the motor is gonna be put to more abuse. But as long as the sleeves were installed correctly I dont see why it couldnt be a very reliable daily driver car. Again keeping things mild. Thats the best part about VE is you can have a rediculous cam in there and you wont even know the difference at idle or crusing around. Well tuned there isnt any reason why it shouldnt last any less time than a normal motor.

There are its drawbacks being at that big of a bore you have very little cylinder wall left and sealing room for the gasket. So one slight mistake on either the sleeves or assembly or even maybe slightly overheating it one time could mean problems. Just make sure everything is in order like your cooling system. Your gonna have a lot more heat dissapation into the cooling system because of the thinner cylinder walls so again if everything is in line there is no major drawbacks.

A 92 x 92 stroker? What? Stroker engines usually are not square. 92 x 92 is square. Like how the SR20 is 86 x 86 and a square engine.

Either way, technical terms aside, do it.

Thank you vqman and ashtonsser for your thoughts and information, I found it helpful.

http://www.sr20-forum.com/mazworx/31754-mazworx-91-92mm-stroker-kits.html

oh oh, i thought the subject said 91/92 stroker, like you weren't sure if you were gonna go with 91 or 92 mm crank.. and keep bore at 86mm.

that's what I was talking about.. LoL

i guess because you said "stroker" i thought you were only going to go with a crank..

at 92 bore/92 stroke you'll have 2.4xx L of displacement, most of that coming from the 92mm bore.. the 92mm crank only gets you about 0.1 L of displacement and the 92mm bore gets you 0.3 more liters.

both for about the same price..

I'd just go with the bore.. but thats just my opinion..

Are you keeping the bore 86? I guess that is a type in your thread title it says "92/92 Stroker" so I thought you meant 92 x 92 stroker.

Sorry guys, typo for sure. But now that we are on topic if im going 91 or 92 mm bore what crank in your opinion?

I am curious to this exact question as well, as far as reliably running a 92x92 VE with 11.5-12.5:1 compression in a DD.

To me, I think lots of the guys who are go with larger bore/stroke USUALLY, not always, go with the biggest they can in either direction. Sleeves cost the same whether you get them 1mm over or 6mm over, so most guys just go with 92mm.

Stroker kits are similar, costing roughly the same for 90, 91 or 92mm kits. Might as well get the most for your money. And even though the rod ratio might not seem ideal, most aftermarket cranks are 8CW and balanced to even higher standards than factory, and the pistons might be larger, but made of better/stronger/lighter materials, so revving them is not an issue. Many of those 92mm kits can rev out to 8500 rpm.

The only thing that seems pertinent is the spacing between cylinder walls, which would be my concern on a daily. As long as you get the sleeves of quality materials and run a well assembled block, I think the wear & tear should be minimal. Good luck.