Some of you may remember I made an ITB setup for the vg30det engine 3 years ago. At that time, I also planned to make one for the vg30dett so I bought an extra set of 45mm bore Jenvey ITB's and this winter I started working on it. Because of the little space underneath the bonnet and the masses of hoses, wires etc. I needed to have an actual 300zx to test fit. A friend offered me his 300zx, it's an old one with 234.000km on the clock (even original engine) and it needed a timing belt.

 

The engine runs OK but at idle wasn't very happy. I found some leaking hoses but they didn't really help after fixing, eventually I noticed the engine is consuming oil badly and probably makes low compression on at least 1 cylinder. The valve lifters tick like hell and I'm in the process of doing something against that before the car goes to the dyno. Will be one of the last trips this engine will make.

 

Now we all know how complicated the OEM manifold and fittings are. The valve covers aren't really helping either. I decided to remove the large raised sections and weld in a new plate. The baffles were fitted back in (no pics). The coils were modified to sit lower and welded/bolted to the exhaust valve covers. I also made a custom oil filler.

 

 

I removed some material from the base of the OEM lower manifold for a cleaner fit. The pipes were than welded upon. The exact angle etc. took long calculations and test fittings so I keep those to myself.

 

 

 

The flanges were welded on and the ITB's could be mounted.

 

 

 

Further test fitting of the Jenvey velocity stacks and clearance underneath the hood. Clears no problem.

 

 

An idle collection manifold was made underneath the manifold, all copper lines with brass fittings no cheap ass hoses that can barely be used in such short bends.

 

 

The complex plenums took 2 weeks to design and cut/weld.

 

 

In order to link the cylinder banks I made a copy of the Jenvey OWK unit that pushes one wheel outside to line up with the other.

 

 

Awesome, thats some Mad Max mod right there, if the air boxes were made from carbon it would be on my shopping list for sure.

Well done rudi you have some skills mate

Hi Rudi,

 

Are you located in the Netherlands?