My 'new longer-term project' ...

[Lightweight_911]

Since my car's engine has quite a high compression I decided to 'deviate' again & fit a lightweight high torque starter rather than use the original (very heavy) Bosch starter - this is a swap that I've done on most of the 911's I've owned but you need to be aware that not all lightweight/high torque starters were created equal & there are some very inferior offerings out there.

I bought mine from AES for about half the price that Andy Prill charges for the same item ...

[Lightweight_911]

I mentioned earlier in this thread that there was a further development in the plastic screw/curry paste saga ...

- the sad news being that after thinking that I'd successfully accelerated the 'ageing' process, the screws gradually (over a period of a couple of weeks) returned to their original (white) colour !

So I had to resort to more stringent methods - soaking the screws in yellow food colouring :





After a week they had taken on a suitable colour (allowing for fading):





& after rinsing thoroughly:





They were then left in direct sunlight for several weeks, checking the degree of fading every few days. After a couple of weeks the fading seemed to have slowed down significantly & a month after the original treatment they appeared to have stabilised at just the right shade :





- comparison with a non-treated screw:





Only time will tell ...

[Mick Cliff]

OCD at its best (or worst!)

It's just plainly superb Andy!

[Tosh]

I am going to show that to my wife to make her appreciate how good she has it!

[DeRRis]

Brilliant!

[Lightweight_911]

Although on special occasions I will run the car with open (carb) trumpets, I wanted to be able to utilise some suitable period-looking air filters the rest of the time.

I had aquired some K&N filters/housings in the (non-Watershield) style that most of the 904's equipped with 6-cylinder engines run these days but the combination of 'tall' inlet manifolds & phenolic spacers meant that the tops of the filter housings just fouled on the underside of the rear deck - so I neede to search for another solution.

On checking K&N's database it transpired that the same shape/style of filter used in their std Porsche Weber set-up was available in a shallower version so I ordered a couple of those.

These pictures show the difference:







Obviously the current trumpets were now going to be too tall to fit inside the shallower filters so I looked around for some suitable shorter ones. Concensus of opinion from those in the know was that a minimum of 25mm free space was required above the trumpets in order not to restrict the air flow.

Having done the necessary calculations & searched potential suppliers I found/purchased what I needed:







Preliminary test-fitting them to the engine showed that there were now no clearance problems ...

[threefiftysix]

I had a good poke around your car earlier Andy - stunning.*








* I didn't actually touch it, I was terrified of inadvertently scratching it

[gridgway]

I was worried that even looking at pictures might tarnish it in some way!

[Mike]

How much are you shortening the trumpets by overall Andy, hope it doesn't give flow problems into the manifolds.

[Lightweight_911]

I had a good poke around your car earlier Andy - stunning.*

* I didn't actually touch it, I was terrified of inadvertently scratching it

A few scratches won't hurt - it's going to get scratched sooner or later !

[ims101]

I had a good poke around your car earlier Andy - stunning.*

* I didn't actually touch it, I was terrified of inadvertently scratching it

A few scratches won't hurt - it's going to get scratched sooner or later !

It's stone chips that are the killers I wouldn't mind talking about your trumpets and filters they might be a good option for my car too??

[Lightweight_911]

How much are you shortening the trumpets by overall Andy, hope it doesn't give flow problems into the manifolds.

Mike -they're about the same overall height as the ones that were fitted when this engine was in my 914/6 GTR.

I won't know what effect these will have on the engine's performance until I get it on a rolling road/dyno.

[Mike]

Interesting stuff Andy, it's a bit of a black art messing with air intakes. A racing mfi airbox
using the shorter SCRS trumpets lost 20hp when fitted onto high butterflies.

[brembo]

Interesting stuff Andy, it's a bit of a black art messing with air intakes. A racing mfi airbox
using the shorter SCRS trumpets lost 20hp when fitted onto high butterflies.

That's a surprise Mike.

[Lightweight_911]

Interesting stuff Andy, it's a bit of a black art messing with air intakes. A racing mfi airbox
using the shorter SCRS trumpets lost 20hp when fitted onto high butterflies.

- but your cams/overall engine spec is a lot more radical so I'm sure it would have more of an effect on your engine's output (he says hopefully) ...

It's all part of the development/research/enjoyment anyway!