Bit of a random Q but how long is the vg30dett from the crank nose to the tail (flywheel) ?

 

Also, does anybody know if the RB25 and Z32 bellhousings / tailshafts differ?

have a look at hybrid z the rb conversions been done a few times and i believe the rb box and vg box vary mostly by the bell housing.

Was thinking of 2x VG30s in-line.. all depends on the length of the block without ancilliaries though.

How on earth do you plan to do that? I can measure my block for you as its currently out but yeah do explain your plan lol. They wont both fit in a z32 bengine bay

I got a skyline GTST currently ;) The engines a bag of sh*t compared to the Z32 engine. I think its unlikely the engine will be compact enoguh ,but the principle's very simple, fly to crank splined coupler - was common-ish in the 40's, 50's with more complex recent examples existing in tractor pulling. I'd need to get a ministarter as I doubt the one starter motor would turn both engines. But once solidly linked the worries about two engines running perfectly 'in sync' goes out the window (as with front/rear of car or side-by-side chain-linked layouts). You just gotta get both with same specs, have them tuned as closely matched as possible then solidly link them, any slack will be taken up by the other engine, as none of the pistons can physically go out of sync.

 

It's a bit of a crazy thought, and all depends on the overall dimensions, but the z32's engines can be had for

Negatives are custom framework being needed to support both engines, the obvious weight difference. Benefits being, both could be mildly stressed at 500hp a piece, but then that should result in a barely-stressed ~1000hp, unlike a hugely stressed single RB25/26/VG30.

i think youve just upset the skyline world lol who believe the rb is farrrrrr superoir to the vg (theyre wrong of corse) although it has to be said the rb is very comparable and a junk load easier to work on. maybe look at using the rb to better effect, get to know it. a 400bhp skyline or zed will be quick enough for any road in this country.

Mines not far off 400hp at the moment and it completely lacks the torque of the 300zx, nowhere near the top end 5th pull either. It's getting full gtr metal fenders gracer kit the works so really needs some serious serious speed to match up to the looks

I know the twin vg30 idea sounds crazy, but I could easily buy 2x breaking tt z's for the price of half the mods needed to take the RB25 up to a safe 6-700hp and talk about unique! I highly doubt the engine bay has the space though :(

or just ditch the gayline and get another z32..........

be easier to rebuild and tune a dirty v12 from somewhere wouldnt it?

Quite probably, does anybody know the width of the Z32 engine bay strut-strut? Been looking up comparisons and the VG30 tops the RB26. The RB26 always seems to get more peak hp but the VG30 torque is miles better, Pentroof tuned an RB26 and vg30dett with the same injectors/cams/turbo's, the RB had 13whp more, but the VG produced over 320lb torque MORE by 4k revs... crazy difference!

it will be a half ton nose weight on the skyline!! handle like jelly

Hmmm, going by this the VG30dett *should* fit in the space width wize at a push... Nothing a sledge cant fix. Hmmm how hard is an RB25 into a Z32? I figure the reverse would be the skyline swap since it seems NOBODY on t'interweb has done it..

Wonder how much weight difference between VG30 and RB25.... think the RB is alloy right? Even a single VG would be awesome!!

vg nearly 250 kgs i think

RB25 is 210~220kg I believe from a bit of a search..