3.4L Motor Swap Underway! - 986 Forum - The Community for Porsche Boxster & Cayman Owners

insite · 02-09-2011, 03:40 AM

quick update; got my oil report back. the first report is in the column on the right. that oil is of unknown type & unknown viscosity, but the best guess is that it was Mobil 1 0w-40. it sat in the engine for eight years. you can see that there was a lot of fuel & a lot of silicon in it, which makes sense. unburned fuel from the combustion chambers slowly seeped past the rings & carried some lokasil with it into the oil.

the most recent test is the column on the left. this oil was castrol syntec 5w-30 with about 1000 miles on it. sort of a break-in oil. my guess was that, since many of the oil passages hadn't had oil flow in eight years, we'd see high metal oxides in this batch, and we do. aluminum and iron are high. silicon is still high, but decreasing. no fuel in this batch, so rings are looking good. all in all, this is about what i expected. i'll do another shorter oil change interval this time (2000 miles or so) & expect the numbers to look 'normal' at that point.

car is running very well & is a riot to drive. only weird issue just started the other day; when the car sits for awhile, it doesn't want to start. it pops & coughs. finally it fires up w/ a little smoke and all is well. leaky injector? we shall see.

Lobo1186 · 02-09-2011, 05:23 AM

have you put the car on a dyno? do you think it is more than enough power for a boxster? I was thinking of doing an engine swap as I have the 2.7 and the most cost effective way for much better numbers is a different motor. would u reccomend the 3.4 or a 3.6 or what have you.

JAAY · 02-09-2011, 05:27 AM

Lobo,

do a 3.6

3.4s can be had a bit cheaper though if it matters.

J

insite · 02-09-2011, 05:57 AM

Lobo -

the power is awesome. depending on the year of your car, a 3.6 can be more difficult to install i think. that having been said, it could use a little more low end torque, which i think the 3.6 has in spades.

i haven't put the car on a dyno yet, but i plan to do it. i think it will be quite a lot. right now, i still have the stock cats & pipes from the 2.5L, but used in conjunction w/ headers & a race muffler. i will probably put some cat bypass pipes on it first & see how that works out.

it's a LOT of power for a boxster. it will blow the doors off a 996.

next up: weight loss. i'm going to pull the AC & a bunch of other crap.