Planning on doing a 3.5 crank in a 3.0 hence making a 3.3

do i really need to do the 3.5 rods or will the 3.0 rods work?

3.0 rod length = 5.822"
3.5 rod length = 5.680"

3.0 stroke = 73.3mm
3.5 stroke = 81.4mm

can someone plz do the math and let me know which rod would be better? id love to use the 3.5 rods because the longer rod means higher c/r but will it be too high? planning on running a VAFC to add air and play w/ ignition timing. also are there any problems with running 4.0 cams in 3.0 heads?

 

Can I ask why you don't want to do a full 3.5 swap?

VQ35 heads flow very well. Take advantage of that!

 

spend more money and do more work, end up with less power than if you'd just have done a 3.5 swap. hmmm.

 

No.
Smaller combustion chambers make higher c/r's.

Using 3.5 rods, piston height will be lowered by 4.055-3.6mm = .455mm.
Using 3.0 rods, piston height will be raised 4.055mm. Chamber size less than zero. Crunch.

(4.055 is 1/2 stroke delta.
3.6mm is rod length delta.)

Nissan did a fair bit of math when they designed and built the 3.5, why wouldn't you utilize that?

 

the same reason 383's are so bad *** in the chevy world. sometimes people just like to try different things if they didnt maxima's would still be running 14's

true is would be easier to just drop a 3.5 in but at the sametime why not just buy a 5.5gen instead of a full swap 3rd or 4gen swap, why cause he feels like it

 

like stated above I don't think the valve will clear if you use a 3.5 crank and 3.0 rods but anyway you go with this I suggest putting the motor together turn it over by hand and check all your clearances

 

Thanks SteveB123! So 3.5 rods are next on the list of ish to buy! Possibly eagles because I would eventually like to spray a 75/100 shot....EVENTUALLY lol

And to answer why....like t6378tp said cuz I feel like it. Plus how many people have a vq33 in a maxima? I don't want the 3.5 cuz. Everybody wants to do that. And even if I did that swap id want to bore it out to a 3.7/3.8 just to have something alil diff. Id love to go the boosted route but its alil out of my price range at the moment. And with a stroker I can get used to how my car handles with the extra power.

Does anybody know an estimate of what my c/r would be? J/w

 

http://forums.maxima.org/all-motor/2...bolt-pics.html

 

....and i read that thread like 3 times......apparently i need to pay more attn. thanks again! def sparked my motivation again to getting this build accomplished

 

neither of those are apples to apples.

doing a 3.3 stroker will - no questions asked - make less power than a vq35 swap (assuming all other variables are kept equal, tuning, other mods, etc). that's just simple math. people build 383s because they are rebuilding their 350s and going .030 over anyways, why not throw a 3.75 crank in there and make it a 383 stroker. they do it because it's easy and cheap to get that extra displacement. if 400s were more readily available and didn't often have cooling issues, more guys would be doing 400s. it's because there's a tradeoff between money, availability, reliability, etc. doing a 3.3 stroker out of a 3.0 doesn't make sense with any sort of reasoning except just to say you did it (which is interesting and cool to some degree, but it's still just slower than what it would have been in the end, and you spent more money/time/effort on it).

doing a 3.5 swap in a 4th gen results in a faster car than a 5.5gen because it's lighter, that's why. also it's way cheaper to swap in a $500 engine than buy a whole new car, that's the other reason.

it just doesn't make sense to me personally. I like a good return on investment. this isn't one. the mechanical mixing and matching of it is cool to me (i love doing that ****) but the end result having no chance of being better than what's already more easily available just sours it for me.