965 3.6 L Intercooler Brumos Race

[AskewRSR]

This Intercooler came on a 3.6 liter Brumos Race motor I bought a while back. Can anyone tell me something about it? I have a 91 C2 Turbo motor and this intercooler is twice as thick. Is this a factory 3.6 liter turbo intercooler or is it something custom that Andial made? I am currently building the engine and will post pics of it later. Thanks Tate

[JBL930]

I don't know, but it looks factory...... Also looks bloody awesome! Nice tightly packed cores, interested to hear more about it!

[AskewRSR]

Jonathan, I was told that Bob Snodgrass at Brumos had Andial build 2 motors for him back in 1994. They were to be in a Hillclimb car to be driven by Al Unser. I don't think that the car was ever built. I was able to buy the "lesser" engine from Brumos racing a few years back. I am now rebuilding it. Here is a pic of the "sister engine" to mine at the Brumos Race Engine room. I assume that Andial had these intercoolers built for them. Thanks , Tate

[IMONBOOST]

The intercooler looks just like the one on my turbo 3.6 which should be the same for any 965. I can measure and post back. What is very interesting is that there are some changes in the CIS plumbing, detailed pictures of this would be of great value.



Looking in more detail, there is no tapping on the WUR, but still a RRFPR between the WUR and FD plus disconnecting the boost signal to the WUR make a lot of sense, means they take away the WURs responsibility to add fuel with relation to boost and give it to the RRFPR. At least on my car and the manuals, I have not seen this regulator, and like I said, makes all the sense in the world since the WUR is not very good at controlling fuel on boost.

[JFairman]

Thats not a fuel pressure regulator in the control pressure line, it is a damper to absorb control pressure spikes and the hose nipple with a red circle you named the WUR boost signal connection is not what that is.
On the 930 and 964 turbo that is an air vent on the top of the WUR which should be hooked up to the air cleaner housing so if the steel control pressure fuel metering disc under the internal return line orfice ruptured, fuel would then come out of that vent and spray into the air cleaner housing where it would not cause a fire immediately but the motor would run rough and probably stall out.

The WUR boost signal connection is on the bottom side of the control pressure regulator and you can't see it in these pics.

[IMONBOOST]

Thanks for clearing that up...don't want to cause confusion.

[Porschephd]

It's a little hard to tell from the pictures but if you look at the front edge it appears that the core is extended. If I had better pics I could confirm but this would indicate that it has been recored by Garretson. I have one and have sent many of these to them to have this mod. It looks very close to factory and unless you know what you are looking for you wouldn't know any difference.

[AskewRSR]

My first question is to Depth. I have a 1991 C2 3.3 liter turbo engine with a very similar intercooler but it is only about 2.5 inches thick. Are factory 3.6 liter 1994 intercoolers 4" thick? Also, What are the specific differences of the C2 3.3 L turbo motor and the 1994 3.6L turbo motor? Thanks, Tate

[timc]

possibly a cup car intercooler from the early 90's?

[JBL930]

This is not a standard 964 turbo intercooler, the 3.6 one was the same as all of them. This one is tasty, doesn't anyone know what it is? It really does look the tits

[koenig911]

That FPR is used to reduce the control pressure at the top of the FD plunger allowing more fuel to be delivered to injectors under boost.

[1100sport]

is there an OEM part number for that FPR?
What do you guys think of this system for our cars?

[IMONBOOST]

measured my turbo 3.6 core and it is 3" (inches), for sure yours is not stock. I agree koenig911, to me that is a RRFPR and I do not have it on my factory turbo 3.6.

[IMONBOOST]

1100sport, if it is in fact a FPR, then is makes all the sense in the world if installed in reverse (which is how this one looks like), as boost increases, we want the pressure to the top of the FD to be lowered, sent back to the tank, hence fixing the leaning condition at high RPM that most of us experience.

[JFairman]

I've seen other diagrams of RUF and some other CIS installation with that device that looks similar to a bosch fuel pressure regulator and for it to be a fuel pressure regulator that lowers the control pressure before the CPR/WUR it would have to have it's own fuel return line bypassing the control pressure regulator... That would be a third fuel line coming out of it that would join into the main return line - and it doesn't have one.

The porsche factory diagram I saw posted by someone here had a part number for it and the description for it was: damper.

It appears to be a small spring loaded diaphram pressure damper being used like a small accumulator to absorb fuel pressure spikes in the control pressure line going to the CPR.

[AskewRSR]

Hey guys, I am on vacation down in Fla. I have many detailed pictures of the "sister" engine. When I get back in my office on late tues, I will try to post some of them. The engine I received was missing many of these parts and I am very interested in trying to figure out the system. thanks

[IMONBOOST]

JFairman, I agree too that there must be a third fuel line and vacuum signal for it to be a Rising Rate Fuel Pressure Regulator, but the picture does not provide the resolution and angles to validate this. I have the parts catalog for my turbo 3.6 and it is not there, see below:

[JFairman]

Porsche never put it on a street car.. only competition CIS cars running higher system pressure.

[IMONBOOST]

Hope someone can shed more details in terms of what Porsche Factory/Brumos race prepared Porsche did to their CIS systems, if this damper is to manage spikes with increased pressure, how did they increase pressure? Did they use two 044s? The damper would make sense to provide better transient control which would greatly help on throttle control under corner exist etc. Any part numbers?

[1100sport]

Here is the thread on the "damper" with part# etc..:
http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/534009-control-pressure-dampener-930se.html