First off, appologies to fast64ranchero. I don't have enough posts yet to reply to PMs.
I did some math though (kind of thinking about cam/rod combination):
Just going off some stock values from the tech archive:
Stock:
- stroke: 3.126
- bore: 3.68
- rod length: 4.715
- static compression ratio (SCR): 8.5:1 (guesstimate)
- dynamic compression ratio (DCR): 7.53:1
- roughly stock cam 252 @ 110, 4 degrees adv
With 1JZ Supra Rods:
- stroke: 3.126
- bore: 3.68
- rod length: 4.929
- SCR: 9.5:1
- DCR 264D 112 at 4 adv: 7.88:1
DCR 274S 112 at 4 adv: 7.61:1
DCR STOCK at 4 adv: 7.94:1
- SCR: 9.1:1
- DCR 264D 112 at 4 adv: 7.56:1
DCR 274S 112 at 4 adv 7.30:1
DCR STOCK at 4 adv 8.29
Those cam profiles are Clay Smith.
Don't know if that's helpful and it's all estimates and playing around with some online calcs. This article was kind of informative as to why people would choose one or the other.:
http://blog.diamondracing.net/understan ... aft-stroke
Living in California with our super extreme 91 octane, I've gotta plan ahead or be forced into a water/meth setup or something. I'm also kind of "directed" by the wife's choice of keeping the C4 (which is why 112 LSA). Seems like I'll get more options for tuning with the longer rods because of the kind of "dwell" at the bottom and top...but I think that I'll start running into valve clearance of I keep bumping up the static compression (of course, there are pistons that could help too).
For turbo or supercharged where static compression stays a bit lower, seems like a perfect fit (part of my thoughts about going this direction was a "just in case, plan ahead thing").
If I'm completely wrong or something, let me know. I'm learning too! Haha.
I haven't been able to get to the rebuild yet because I've got a 19 month old. The time I've had has been devoted to the brakes and rear end. My wife only wanted to be able to stop and turn with power. I've also been kinda scouring the Google maps and local errand drives for closer machine shops with better hours (surprisingly hard to get any kind of information down in LA sometimes). Should be in October though!
I'm a rambler sometimes.
Edit: fixed some typos.