IcemanG17

Chris
Looks very good!! Your engine is so clean!! I really like the look of those tubes....I just wonder how hard it will be to maintain them when they start to oxidize like aluminum does? It wouldn't be that hard to polish them every now and again.
Great work! You gotta concours that car!

sweanders

The early 944's has similar holes but Porsche removed them on the later year models. On my car I had a bad balance shaft roller and the belt was damaged which lead to my filter getting black from the belt shreds getting sucked into the filter..

airosey

Wow, I can't believe all of the great comments! I've already got a couple PM's from people interested in a set. I'm still working out the details right now. I want them to be perfect before I try to sell a set to anyone. I thought about putting a set on ebay, but I would definitely offer then to rennlist members first! I was concerned about the oxidizing aluminum, so I may have them powdercoated. My strut bar and fuel rails are polished, so I may just deal with a little upkeep. Last night I put the hoodliner in, so that's one more detail out of the way. I'm still rounding up nuts, bolts, and clamps to get the small parts looking good too. I'm kinda OCD about it all!

Here is a before pic not long after I got the car. It had been sitting for 10+ years

SharkSkin

On the 928, there's more going on behind the covers. Heat build-up may be a concern. At least, it seems that the engineers had some concerns about heat buildup, or they wouldn't have put the vents there in the first place.

Alan

Not wanting to dampen things here but it would seem installation & removal will be quite a bit more trickly (cross brace removal?).

If you do have to remove the cross brace to install - seem like fitting it to the TB cover ports shouldn't be that hard...

At the front "intake mouth pieces" are you going to use a gasket or will you remove those to install direct to the pipe - or loosen the other end by loosening the airbox... No flex in those pipes - right - but the engine moves...?

Also is there an issue with more heating of the intake charge with metal tubes. Probably not a huge effect but it would seem that plastic, neoprene, silicone, foam etc would have some benefits in insulation...

Looks like it will turn out nice - and it does match that clean engine bay well.

Alan

airosey

Some good points Alan! I installed the tubes without removing the cross brace. I had to use a piece of cloth to keep from scratching them up though. There is hardly any clearance between the two. It would be easier to remove the brace, only takes maybe 2 minutes tops. And you reduce the risk of scratching them up. At the front of the engine bay there will be a set of 45 degree angle silicon boots. I had already thought about engine movement. To keep this from being much of an issue, I left a 1 inch gap between the filter box and the tubes, this gives the silicon room to move. As far as heat, I guess there is no way to get around it. I figured there would be a little loss in power. My 81 needs as much as I can get, but for me the appearence of the tubes outweights the loss of power. If I ever get to a dyno, we could figure out how much of a loss if any. You could cover the bottom the bottom half of the tubes with some sort of insulator, not sure if it would affect clearance though. This is just the first mock-up of these. The next set should fit more nicely. But, some issues will have to be resolved before I consider selling these to anyone.
Thanks for the suggestions!
Chris

heinrich

To be very honest i thought you had remade the intake runners from thin alum to increase flow. Sorry

airosey

That's OK heinrich. The runners do look nice and shiny now. But that's just because they are powdercoated. I couldn't imagine making intake runners, more work than I want to get in to.