Garrett76Zt

its a z31. . . as soon as you hit the gas it'll squat, go negative camber and tuck those wheels right in for ya. . .

you tease! I was just getting into it . . .

awesome info. After reading that I really want to turbocharge one! they've really tried hard to reduce detonation in this motor. I mean you can run 87 octane in it with 10:1 CR! Also curious if a "short 3mm ringland" could be one deficit when trying to boost it. As far as the metal powder cast rods . . .heres what I found: A company that makes metal powder forged rods, Metaldyne. They have some info on the process. http://www.metaldyne.com/metaldyne/sections/powdermetal/connectingRods.asp Here are two bullet points that caught my eye: • Meets or exceeds the ultimate tensile and yield strength of forged steel • Requires less machining, reducing OEM cost Check out the videos at the bottom of the page . . .

hmm, the height thing does seem to be a bit of a challenge. On another note what do you guys think about how undersquare this motor is? The displacement is great but with a 93mm bore and a 102mm stroke what do you think this would be best suited for in a Z? Also how do you think that would play into a boosted application?

I know Kevin mentioned this and if I were doing this swap that whole plastic intake manifold business would go bye-bye. That should knock off several inches from the height. EDIT: I also didnt realize that the I5 is rear sump while the I6 is front, hmm. I wonder if dropping in an I5 would be easier? Its still a minimum of 3.5liters . . . If we could get a set of motor mounts that you could use to bolt in the 4,5,6cyl versions of this Atlas motor that would be awesome.

Bob, I agree with you on tuning via lambda, and probably that this whole conversation should be condensed to that. As far as your math goes for calculating AFR's when using meth injection, its just not that simple. There is more going on than just a difference in stoich values. Tuning via the method you suggest would probably result in a safe tune, but I contest that it would result in tune that is much too rich, sacrificing power.

great info guys! I really wouldnt think twice about doing this swap if it wasnt for the fact that I will need to have both an intake manifold and exhaust header fabbed to use this motor in a turbo application. Still might though! haha

Guy, so how do you find out if your local dealership is a "cool" one or not when it comes to voiding warranties due to Mods and whatnot? I mean it would be nice to just walk back into the garage, introduce yourself to the techs and ask them, but generally its just a service manager that you deal with . . .

Wrong place for these questions, you probably wanna start a new thread.

I currently tune my car around 11.2 right now.

http://www.coloradofans.com plenty of 5sp 5cyl owners there.

I'm afraid I have to disagree with Bob H's suggestion. Please bare in mind that I dont know everything there is to know about this subject but . . . 1) The following sentence does not make any sense: "10% Meth A/F target ratio for stoich,(NOT max power): 13.88 or rounded to 13.9 That is now your target A/F for cruise/part throttle/idle." We are talking about methanol injection which is only injected when in boost. Your target AFR's for cruising will remain the same. 2) Consider this, isnt the reason for a turbo motor to run richer 11.5 afr as opposed to 12.5 afr in an NA application due to the fact that cylinder temps are increased from the pressurized air entering it? If that is true then you must also consider the role that the methanol is playing in reducing those temperatures. Also consider that the more meth you spray the more cooling effect it will have. Yes if all things were equal between gasoline and methanol aside from their stoich values, Bob's suggestion would be the way to do it. Speaking for myself and others that are running more like 20% methanol (scottieGNZ), if I plug those numbers in I get a target AFR of 10.1, I can tell you from experience that my motor doesnt like that, haha.

IMO, Micky Thompson ET street radials on zx swastika rims is the combination to run on a stock fendered car. Size = 235/60/15

Oh crap Mike's gonna hafta get back on his horse, hahaha. Nice runs!

aka yes 5cyls did come with manual trannies.

I've been running a z32 trans behind my L for the past year and a half or so. I have zero complaints with the quality of the adaptor or its functionality. While the z32 trans is certainly tough it does have a common problem with the synchros in 3rd or 4th gear. Granted I have been pretty tough on mine but my 4th gear scratches nearly every time I go into it. Alot less annoying than swapping trannies every week though!

Kevin, the flywheel from both the 4 and 5 cyl versions of this motor will not work with the LL8 (4.2 liter). The bolt pattern on the crank is different I believe. You will need a manual bellhousing from either of those motors and then it can be mated up to a Toyota R154 5-speed from a MKIII Turbo Supra. The flywheel and related parts are the real holdup IMO.