7 blt 4G64 or 6 blt 4G63? PLEASE, ANY AND ALL INPUT IS SOOO APPRECIATED!

[BryanK]

Hey. Well I've got two different engines lined up to replace my crankwalking 2G 7 bolt. Idealy, I want to do the 7 bolt 4G64 shortblock because its basically a direct drop in for my 2G. The head bolts right up to the block, I can retain stock ecu/mas, and the extra 6cm of bore will help me get great torque. I have a source that has quoted me about 2K to completely build a 7 bolt 4G64 shortblock for me... that means I get the block fully prepped (hot tanked, decked, etc), Eagle rods w/ speed pro rings, Venolia forged pistons, stock 64 crank, all balanced and assembled for me. I have a source for a 4G64 7 bolt out of a sohc galant including rotating assembly for $200. Add that up... those numbers are great. Figure $400 for the pistons, $350 for the rods, 100 for the rings, 100 for moly coated bearings, and say $300 to have it all balanced/blueprinted... thats $1250 on parts alone, plus they're completely assembling everything and doing all the machining. I figured 2K is a darn good price, especially since I get to reuse my stock 2G heads and intake (I know I know.... they don't perform as well as the 1G's do, but I'm a little short on $$ at the moment, eventually I'll have the head ported, etc and get a magnus intake). My only problem with this is the 7 bolt part. Will I have problems with Crankwalk with the 7 bolt 4G64 like the 7 bolt 4G63's do? Do they have the same problems? I dont even want to think about crankwalk again, so is this a good way to go? Main issue... Will this support ~400 whp and not have crankwalk/reliability issues? (Please don't flame, thats just my goal, I think thats fairly realistic)
My other choice.... 6 bolt 4G63. I have a source for a 6 bolt 4G63 out of a '91 GSX including rotating assembly for $350. I think its just the shortblock, but I'll have to check. I know someone who can build me a 1G rod/95 piston motor for $1500, but that doesn't include the necessary machining that I'll need done to the block so I can swap it into my 2G. That also doesn't include the head/intake, and I also think I'll need a different fuel management system (right?). So, figure I can use my '95 pistons with it, but thats basically the only thing I get to retain with this swap. So, $1500 to have a 6 bolt shortblock, plus say about 900 to have it machined so I can swap it in my 2G, another $250 for heads/intake puts me at $2,650 for a pretty nice 6 bolt that won't have crankwalk issues (I know I know, they still get it but if I get it assembled right it shouldn't walk) and should support my goal of 400hp without having reliability issues.
With my knowledge, the 4G64's don't have crankwalk issues, regardless of whether or not they're 6 or 7 bolt, but then again the 64's weren't turbocharged so that might be an issue with my turbo application. Do you think I'll have crankwalk with a 7 bolt 64 bottom end? If not, the 64 makes more sense economically, plus i am absolutely in love with the torque numbers that engine puts out.
WHAT DO I DO? Above all else I want this done right the first time. NO FRIGGING CRANKWALK! (or at least I want the engine with the least probability of walking)
Thoughts anyone?... PLease? Seriously, I need help with this one. I know I ask a lot of questions, but this is a very very serious one. No dreaming here, I have the $$ waiting but I dont know what to do with it.
Thanks for your time,
Bryan

 

[Hobbes =^.^=]

Your best bet would be the 1g 6-bolt. Stronger then the 7-bolt and almost crankwalk free. It is not worth putting in the 7-bolt because there is still a chance it could get CW again.

Or you can just get one that is pre-built from www.buschurracing.com or the 4g63/64 from www.magnusmotorsports.com Their hybrid IS very pricey. (starts at $3,000 US) You get the torque but you lose top end I believe. Remember there are 4g63s that do just as good and better.

Keep in mind your goals. You don't want to spend more money then you need to when building your engine.

=^.^=

 

[BryanK]

Uhm... yeah, 4K on the shortblock alone is a little out of my league. Not that its not a nice build or worth it, I just don't have that kind of $$ and I highly doubt I'd even be able to get the $$ to exploit magnus's built 64. Its either $2500 on an engine and the rest for mods to get the engine running at its full capability, or 4K in a shortblock that doesn't even come close to meeting its potential. I don't plan on even pushing it past 400hp, so 4K on the shortblock alone is pretty much wasted $$. Seeing as how the hybrid is cheeper, and makes more torque (my car is just for fun.... I'm not planning on winning any real drag races with it) I really really want to go that route. What do you figure my odds are of getting the walk.... say on a scale of 1-10, a 1 being equal to the 63 6 bolt, and a 10 being equal to the 7 bolt 63.
Thanks for the input,
Bryan

 

[BryanK]

When I said that the hybrid is cheaper... I mean a non magnus hybrid. The 7 bolt hybrid from a galant. I can get one of those going for about 2K, vs. the 2.5K for a 4g63 6 bolt. PLEASE, DSMTUNER WISEMEN, PLEASE HELP ME OUT!?
Thanks so much,
Bryan