Wax,s 260z 2+2 long term build
Posted 20 May 2009 - 07:27 PM
It was going to be an rb30det but looking around i see they are getting big power out of the l28 turbos
so i have decided to stay period for the car
I brought it off a fellow member here and it seems to be in reasonable condition.
Got a few areas IE under the dash that i need to fix the rust in but nothing to major
I am sure the owner before me didn't know about that so its all good
Anyway I don't have much room in my garage at the moment on account of jetskis and other toys in the way so i decided i would start on the engine at work
Mainly the manifolds
Its common knowlodge that a plenum should be about 1.5x engine cc which means my one should be 4.2 litres
Its not hard to look at the stock injection manifold and see that its no where near that.
So out comes the alloy cut off saw and we have this.
Posted 20 May 2009 - 07:30 PM
Of course it will have all the holes filled and the casting cleaned up
When its all cleaned up and run over witht he cardtridge roll i will take it and get it sand blastered
I want to have the sane cast look on the whole manifold so it looks like an aftermarket system
Posted 20 May 2009 - 07:31 PM
I have the exhaust flanges off being cut by the waterjet guys and i will start my exhaust manifold as soon as i have finished the intake
Posted 20 May 2009 - 07:42 PM
Posted 20 May 2009 - 08:06 PM
Posted 20 May 2009 - 09:20 PM
Posted 22 May 2009 - 08:16 PM
when i started i couldnt fit a 32mm ball bearing down there now i can roll a 35mm one straight down there
I also cleaned out the short turn alot so that its a more direct flow
Im very happy with the result
the pictures dont show it as well as it should, but you get the idea
I have started to clean up around the outside of the manifold , the casting marks will all come off then i will take it down and get it sandblasted to give it that sand cast look again. My goal is to make it look like an aftermarket manifold and not a hand fab job
The flash off the camera takes awy from my porting work, i will try and get some better ones tomorrow
Posted 24 May 2009 - 06:55 PM
Hopefully i will have the manifold welded up this week
Stripped down the spare l28 that came with the car today
all cleaned up enough to go in the back of the car now
Will go off to get hot tanked this week
Posted 24 May 2009 - 07:27 PM
They are my favourite socks
Im happy with the way the manifold is coming along. Hopefully when its all welded up it will look as good as it does in my head
Posted 25 May 2009 - 07:12 AM
Posted 25 May 2009 - 05:30 PM
I could see a shortcoming on my first design
So i changed it a bit today, I think it will look alot better and should flow alot more as well.
Of course it needs to be welded up and its just held together with tape at the moment.
Hopefully i will get it tacked together on wednesday and then will make the plates to over all other holes. Should be excellent when finshed
Posted 25 May 2009 - 07:31 PM
The Jandle is is something you wear on your feet or use to prop up unwelded intake manifolds.
Posted 25 May 2009 - 10:32 PM
Would reconsider putting your entry too close to the first port.
Have a look at the flow works on the second page, this was for a n/a at about 4,000rpm
I've been thinking of resurecting that project now I have a turbo exhaust manifold.
Posted 26 May 2009 - 07:14 AM
But i see your design and its further. Im not getting to stressed about it , The flow is going to be far better than the orginal and since its going tbe force feed i think it will flow enough to reach my goal of 300 to 350 whp
Thahks for the comments
Posted 27 May 2009 - 08:54 PM
Then its a case of welding it all up and making a top and bottom plate and then manifold is finished
On the bottom plate i will weld a thicker plate so i can put in the map sensor and vacum fittings
oh i wore my socks to keep every one happy as well
Posted 28 May 2009 - 04:57 PM
this is the manifold with the side panels on
Well sitting in there anyway
Its almost ready to be welded shut now
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