VH45DE ITB's on stock runners....

[driftnomad]

I am working on fabricating some brackets to put ITB's on my '94 VH45DE, working on it today, I noticed a few things. I know that the runners are different lenghts (well 2 different lenghts). Anyways the runners for cylinders 1,2,7&8 all are the shorter while 3,4,5&6 are the longer runners. However, if you rearrange them so that you are using 2 sets of the shorter runners (1,2,7&8), arranged as described below with a little trimming of unnecessary bracketry, you end up with 4 equal lenght intake runners PERFECTLY level and inline with eachother on each side.Cylinder #: Runner #:1 13 25 8 7 7 2 2 4 1 6 7 8 8

With NO modification the OEM fuel rail will fit and 2 of the holes line up perfectly. The other two bolts can be made to fit with very very little modification. I have been looking at throttle bodies from GSX-R's and Hyabusas and other **** and they all seem to have the injectors going directly into the throttle body, but there is also the previously stated provisions on the intake runners for the injectors and rail. Has anybody else tried this?? If so what throttlebodies did you use anybody have anything to say at all?

[nat0Z]

YES!!!i have a set of the shorter runners coming from hawaii me and my late mate were wondering how the asian fellow with the blue 240z got the inline, and whilst we had his top end in pieces, we sat there with the runners.NOW, even more to your discovery what we found, was that if you rotate all the 4 runners so the intake port @ the top of them is facing towards the centre of the motor, with a lil bit of linishing the ally pads and the back of the castings they can be put this way too, and the injectors would then sit on the inside shooting more towards the inlet valves.

when my extra set arrive i WILL be mocing this up on my mates motor.However since he passed last month things have been put on the back burner for a while, as ther is a bit of aingst with this all as he was the one who talked me into doing the vh swap into my 240z, after he bought one and it highly resembles an oversize motorbike motor.

RIP Eric 8-6-2008

cheers nathan

[nat0Z]

check out my most recent pics on photofuket

http://s303.photobucket.com/albums/nn157/nat0vhZ/

from when we werew messing around with the setup.but other pics were on my mates phone, when bolted up, still yet to grind etc to get them to sit on the inboard side, so when i do i will post pics.

aim is to get them inline to do a nice ally tube type plenum or a small bread box arrangement, but yes the runner lengths are shortened because of this, thus shifting heimholtz up in the rev range, ie intake effiecincy is moved higher in the revs, shifts peak torque. slightly!!nat0

[Mettler]

I'm sure this isn't a new discovery? Guys have already done this a few times and discussed it o_O