Ruf-Dan-Ruf

the hose that is .... right off the trumpet.

Standing at the back of the car facing the front it is the furtherest(is there such a word??) away on the right hand side.

The plastic manifold pops out of the rubber hose that attaches to the trumpet that attaches to the head.

The trumpets, the hoses and the clips are all new and are in perfect condition.

There is no oil residue or anything obvious to cause this other than boost pressure popping it out. (I run at 1 bar boost)

So ... my question is ... is this common? is there a special renlist fix .... is there a post in the archives that I should have read b4 posting this???!!!

My thoughts are to manufacture a strap from the top of the manifold in that area to the bolt hole for the trumpet in question.

All help / suggestions / advice appreciated.

ruffy

pics would be more discriptive..

breeze constant torgue clamps should fix it, Anir and Viperbob should know a thing or two

Ruf-Dan-Ruf

It is the other side and at the other end of the block directly below the airbox.

This is the old hose and old trumpets. The new ones are black not orange but better shows what I am talking about.

It only just kicks out at the back enough to get a boost leak.

Jean

Dan,

Maybe not much help, but you should not be having this issue even running at 1 Bar. My engine has been setup for 1.3 Bar + and it has the stock clamps and stock trumpets, while Breeze clamps have been used in several other places.

I would still think that they need further clean up and tightening???

Kevin

Like Jean said, it takes alot of pressure to unseat the factory black hose with clamps.. This design has been used ever since Porsche has upgraded from the plastic manifold on teh 964. Make sure everything is clean, use brake clean and install new hose clamps..

Ruf-Dan-Ruf

Thanks Jean/Kevin.

Kevin, the manifold is a RUF altered 964 manifold that they have customised for the BTR-2. (I haven't seen a 964 manifold but my mechanic tells me that this is what it is.)

You say since upgraded from the 964 .... if my mechanic is correct then from the trumpet point of view anyway this is a 964 manifold. Does that make any difference to your experience with this issue ... i.e was the 964 plastic manifolds prone to this problem.

Just getting my facts right before arguing some warrenty repair work.

Thanks

Kevin

The '89 964 manifold was aluminum. A year and a half later it was changed to plastic. A design that is current even with the 996TT.. For your info your Ruf turbo engine is basically a 964 engine converted to a single turbo. Another words it has more in common to a N/A 964 engine than it does to a 993TT engine.. The manifolds should not give you any issues with good boots and clamps..

Ruf-Dan-Ruf

Thanks again Kevin.

The engine specs I know are.

The block is 993, the crank is 993, the rods are 993, the pistons are 964 milled flat, the heads are 993 RS, the cams are RUF specials (with numbers machined off), fuel system is RUF/993, wiring loom is RUF/993, exhaust manifold is RUF, turbo is K27 hybrid with external wastegate, large Bosch diverter, and the inlet manifold is plastic 964 modified.

Kevin

The block/case is actually a 964 case.. Infact the same case casting is used up till '04 in GT3, GT2 and TT's.. It was my thought that the heads were 964 RS Twin plug heads? Ruf actually uses a K27/K29 hybrid.. Albiet a large compressor housing the compressor wheel isn't very efficient compared to the newer designs.

Ruf-Dan-Ruf

Going off the invoice with Porsche part numbers, the heads are 993 RS. They only use one plug the second plug is plugged They may have put the wrong part number on the invoice?? Do 993 RS heads have twin plugs??

I had the turbo seals replaced when the engine was redone. I will have to wait a while before I can justify a Kevin upgrade unfortunightly

Kevin

As a rule of thumb all the factory turbo engine for the street, came with single plug cylinder heads..

Ruf-Dan-Ruf

Did they all have two plugs with one sealed up or machined with only one cylinder plug? Mine has two plug cylinder heads but one plug is sealed up??

Kevin

The turbo's have only one plug machined. If I was you I'd call Andial and get there ignition coil splitter and use your 2nd plug hole. This was you can use a 964 or 993 NA dual distributer.

Jean

Dan

The 964 and 993 N/A heads were all twin plug. Your car having been converted from N/A to turbo, they have sealed the second hole. On a turbo head, you only have 1 spark plug/cylinder in general. I believe RUF only did twin plug turbos on some CTR2s.

Consensus seems to be that you do not need twin plug on a turbo engine unless it is a race/high output engine, even then, it is debatable below around 600 hp. The difference between the aluminum and plastic manifold is that the plastic manifold flows better, is lighter, and cheaper to manufacture. What they might have modified about your manifold is the MAF and maybe the TB location, as they might have had to cut the intake and turn around the TB location a little to fit the I/C, but I doubt that anything was done to it to improve performance.

Ruf-Dan-Ruf

That all makes sense. I therefore have NA 993 RS heads with 2nd plug sealed..... thanks for the education team .... It's good to work out exactly what I have on this rare car.