[Diy_efi] Projects

[Carter Shore]

It's a long term project, not many pix yet, have been planning, and acquiring the bits and pieces for years.

So far:
pristine (in OEM packaging) 1296 big journal crank.
Ex-IRL 6.00" rods, to take the Clevite 1798H 1.850" rod bearings.
Venoilia forged pistons.
Ex Nissan 300zx TT T22 turbo.
various intercoolers
1993 Escort complete intake, ECU, harness, sensors, etc.

The intake will be fabbed from Escort 1.9 hardware, it's perfectly sized for my application. The stock plenum is brazed from round aluminum tubes, which makes it easy to cut and interface to custom adaptors, using short lengths of 'mine spray hose' (this is tough stuff). The Bosch injectors will be fed from a length of fuel rail extrusion. I've already built the manifold adaptors, here are some pix and drawings of earlier activity.

http://www.flickr.com/photos/13867611 at N04/

The exhaust will be fabbed from a Pacesetter header, basically using just the flange and first 6" of the tubes, the rest to the turbo inlet will be custom bent tubes. Needs a custom turbine exhaust housing (the stock Nissan unit won't work). To clear the wastegate as it opens, will be made from a 1-1/2" steel pipe.

I was originally going to hack the Escort ECU (EEC-Sucka, etc.), but I think Megasquirt might be better supported and easier to tune. Will use EDIS based ignition, so the dizzy can come out, but have to mount a 36-1 timing wheel on the crank pulley.

The Spitfire rod bearinga are the weakest point. The crank uses 3 main bearings. So by employing the big journal 1296 crank instead of the longer stroke 1493 crank, I'll have a stiffer unit that has greater main-pin overlap. It will be smoothed, profiled, balanced, and Nitrided.

The stock Spitfire rods are nearly 750g. The stock crankpins are 1.889", by grinding to 1.850, I can use the IRL forged rods, which are about 535g. They are also 6.00" long (stock is 5.75"), which nicely matches the Venolia pistons that have 0.22 less pin height than stock. I'll have to get them rebushed for the Spitfire .8125 pins.

My initial attempt will be to get reliable 120 HP at 8-9 psi (stock NA is around 80 HP).
After shakedown and debugging, I'll see about running more boost, but I want to make incremental changes if possible, until I find how much boost the bottom end can handle. If the T-22 runs out of steam (as the compressor map predicts around 150 HP), I have a T-25 and a T-28 waiting.

So we will see, but getting there is half the fun.

Carter



--- On Fri, 10/12/12, Bill Shaw <b.shaw at comcast.net> wrote:

> From: Bill Shaw <b.shaw at comcast.net>
> Subject: Re: [Diy_efi] Projects
> To: diy_efi at diy-efi.org
> Date: Friday, October 12, 2012, 10:41 PM
> I've been having fun,? that's
> what it's all about.? :-)
> 
> The turbo Spitfire sounds like it could be a fun ride,
> too.? Do you have 
> any pics?
> 
> bs
> 
> On 10/12/2012 10:30 PM, Carter Shore wrote:
> > Nice projects Bill!
> >
> > I'm working on adding EFI to one of my Triumph
> Spitfires, as part of an overall turbo project.
> >
> > --- On Fri, 10/12/12, Bill Shaw <b.shaw at comcast.net>
> wrote:
> >
> >> From: Bill Shaw <b.shaw at comcast.net>
> >> Subject: [Diy_efi] Projects
> >> To: diy_efi at diy-efi.org
> >> Date: Friday, October 12, 2012, 9:13 AM
> >> It's good to see some life come back
> >> into the list again.? What's
> >> everybody been working on?
> >>
> > _______________________________________________
> > Diy_efi mailing list
> > Diy_efi at diy-efi.org
> > http://lists.diy-efi.org/mailman/listinfo/diy_efi
> >
> 
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